Hi Lola, that is awesome!!!!! Beautiful car you have! What color? Glad you can have and enjoy one. Thanks for commenting. Take care!

@@Doulop The Anniversary Editions are ruby red {like a maroon}. I have a '93 as well. But even the 2003 50th Anniversary Edition is also a ruby red.

Doulop it’s black with red stripes down the center!

Road Dawg yes it was originally that, but I got it repainted.

Road Dawg, the very first Corvette I ever drove was a 2003 50th anniversary. A friend of mine let me borrow it 2 years in a row for Prom. It’s where my love of vettes came from!!

YES!!! That’s it! Thanks so much for correcting my vocabulary ;) Thanks for commenting. Take care. Merry Christmas!!

Don’t forget the speed thermometer

Hahahahahaha!!! That’s right!!

Hi Chris, I have been told it needs a new tach filter 🤷‍♂️. It’s a little wire and box behind the engine. Pretty easy fix apparently! I’ll make a video when I do! Thanks man. Take care!

Hi Keith. Thank you very much, I would love to get it re-dyno’d. Maybe this Spring or fall! Thanks for commenting. Had a great Thanksgiving! I hope you did as well! Take care!

Yeah, I know what you mean. I recorded videos for my own fun wayyyy before KZfaq. I then figured why not upload it now that I have a channel. Thank for watching and commenting.

Thank you for watching and commenting. I was impressed as well.

the 91 l98s are rated at 245hp so thats right on par with the rating from Chevrolet

Hi Thomas, you are very welcome. Thanks for watching. I was hoping to do a dyno this year too but not too sure it’s going to happen! Awesome you also have a 91 :) take care!

Wow!!! That sounds like she would rip! That’s awesome you could do that. Drive her hard!

Thanks man!!

Hey Mr. Wood, nice! Love the C5. Absolutely love them. Black on black. Can’t beat it! Great car. Thanks for commenting. Take care. Merry Christmas!!

Thanks Frank! I have to agree with you ;)

Thanks John. Hope it to do another dyno this season! Thanks for your comment.

Hi Danny! Yes, definitely younger. It was funny, for sure! Thanks for commenting. Take care!

Heck yeah. Great cars!

Awesome!!! Sounds gorgeous!! I hope you love her to death! Enjoy and thanks for letting me know :)

Oh my yeah. Those cars must not have been Chevy’s ;) thanks for commenting man. Take care!

You are welcome, thank you!

Hey, I bet you are right!! We will find out in the spring :) I love the torque over horsepower anyways! Take care!

@@Doulop , That's the way I feel too. Living in Pennsylvania, we don't really have the right road topography for massive horse. But the torque is a monster, when you need to pass on those country roads. Be careful though, I had my '90 L98 break traction with new tires on dry pavement and it's an automatic! Best of luck to you.

Road Dawg, that’s the best part! I love dropping her down and passing people quickly. It’s exhilarating! Thanks again!

what Bushings ?

Hi Johnny, yeah, dyno’s are hard to find, honestly. There are a few but not a ton. What bushing are you referring to? Thanks for commenting. Take care!

Prothane 7-2013-BL Black Total Kit www.amazon.com/dp/B003AW0PLE/ref=cm_sw_r_cp_api_i_4yi6Db8D3CHD0 Something to take make it a little smoother.

I see now. Thanks for showing me!

Doulop The new polyurethane bushings are better than factory. Will make it ride new again.

Thanks man! It’s pretty cool to watch them do it, I think! I hope you can get it done!

Gotcha! It will all work out!

I would love to drop an LS motor in her some day. Maybe in the future. Depends on how well my channel does ;)

Speed traps are lame

Oh my yeah!! Best friends since 4th grade (1998). Thanks Josh. I’m glad you enjoy them :) means a lot!

Wow!! That’s would be insane to drive. Good luck!! Thanks for commenting. Take care. Merry Christmas!!

@@Doulop thank you and a merry Christmas to you also

I agree. Thanks for watching

Thanks so much! I appreciate that. I never had to replace a headlight motor yet. Sorry man!

It’s so frustrating. I’ve gained a lot since COVID began. So mad at myself.

Hi John, nice comment. Thank you! I agree with the torque dropping after 3300 RPM. Very bad drop, lol. How do you do the ported things and plenum runners? Are they parts you buy or what? Thanks again. Merry Christmas!

@@Doulop You can go to a company like Extrude Hone and they will port your intake (plenum, runners, baseplate). Or, you can replace the TPI with another intake, e.g., the Miniram (that loses the TPI look). Or you can go with an aftermarket system like a FIRST TPI that is like the factory TPI in design but on steroids, and flows 30% more air without porting (and can be ported to flow much more, e.g., via Extrude Hone). I think that on a stock or rebuilt 350 L98, either the Extrude Hone option or the FIRST TPI with the GM Hot Cam would bring you up to near 300 HP at the rear wheels (RWHP), and that would let you run 0-60 in the mid-4 second range. If you can do the work yourself, the FIRST TPI and the cam would run you under $2K. Your engine had 100K miles when the video was made. I'm sure it has more now. If I was doing this, I'd get a 383 stroker short block, get AFR 195 heads on it, call Crane Cams for a recommended hydraulic roller cam for 2500 to 6000 RPM and 1.6:1 ratio roller rocker arms, and get a FIRST TPI manifold. That package would produce well in excess of 400 crank horsepower, and likely well over 350 HP at the wheels. Imagine your car with twice the RWHP, yet it would be tractable and driveable, with good fuel economy if you kept your foot out of it... and VERY fast, about as fast as you could safely use on the street. My '91 L98 has 52K miles on it, and the Hot Cam and a full Borla exhaust. It runs 0-60 just over 5 seconds. My cheap performance fix would be the FIRST TPI intake and AFR heads.

Thanks again, John! Merry Christmas!

I have to disagree with you on some things, I don't believe an LT1 intake will bolt on a L98 and its not just put it on and get the HP and torque of the LT1 if it was Chevy would have just changed the manifold instead of engineering a new motor. The LT1 was quite a bit different, one difference is the L98 had a distributor in back of the intake and I believe coil packs back there where the LT1 had a distributor above the crank shaft and say what you will about optispark but it was far superior controlling spark then anything before it, so I don't believe the LT1 manifold will allow for the rear distributor. The LT1 also had reverse coolant flow which enabled higher compression ratio and I would have to go out in the cold garage and look but I don't think the coolant runs through the intake but I think it did on the L98. But the real thing is why do you want to beat those 30 year old cars up remember its more than an engine, when they were made Chevy had no intention of making that car to be still on the road in 30 years or over 150,000 miles, it was a little more than 10 years earlier that the odometers only went to 99K. I have a 92 LT1 vette in black rose metallic that 10 years ago was getting close to being a parts car and I have been resurrecting it ever since, you destroy yours and it makes mine just a little more rare and it keeps the swap meets running.

@@jaymortensen642 On the subject of intakes: The LT1 intake can be modified to work on an L98. A few people have machined them to fit small cap HEI distributors. Obviously a TPIS mini ram or FIRST intake would be an easier swap though. The L98 113 heads and aluminum LT1 heads flow basically the same in stock form(190-ish cfm). Combining the TPIS intake and an LT4 "hot cam" kit with some tuning seriously wakes these motors up. Port the 113's with 2.00/1.56 LT4 valves and they'll support over 500hp. On the subject of reverse cooling: Chevy had to bump the LT1's compression up because the heads run so cold. Aluminum heads already retain less combustion heat in the cylinder than iron heads and produce less power for a given static compression ratio. By cooling the heads first, the LT1 really doesn't have a huge advantage over the L98. On the subject of modifying older C4's: There are still guys out there modifying and racing C2 and C3 Vettes. The great thing about fiberglass is it doesn't rust, and with Corvettes being body on frame there's nothing underneath that really can't be rebuilt or upgraded. It not hard, or relatively expensive, to build a serious autocross or road race car from a decent condition C4.

Thanks for watching, Mark. All good points. I never heard of an f-body but I will take your word for it.

@@Doulop a F-Body is all Camaro's and Firebird's including all gens

Never heard that before. Thanks Mark!

Hi David, I have 115,000 on her now. Thanks for complimenting the video. Take care!

Hi Jeff, I’m not sure why that would be. I’m really sorry. I don’t know much about engines, I wish I did. Good luck on finding the issue. Take care!

93? that would be an LT1. opti spark maybe? i have a 96 Z28 and i had to replace mine once.

@@ad356 The '93 was a first-generation, non-vented Optispark. Even still, 40K miles is an early fail for OEM. Once you replace it, you'll be doing it over and over again as Mitsubishi and Delco no longer make them. Factory stopped selling new units years ago. Final prices were around $1,200 for the part. $50 Chinese knockoffs are just as reliable as a $600 MSD unit. I hope you kept your old OEM Optspark. You can harvest the highly coveted Mitsubishi optical sensor and repurpose it. Rebuilders are paying $$$ for the discontinued sensors.

@@RARenfield i have a delhpi unit i bought back in 2014 when i bought the car. not sure what sensor it has

Some folks add aftermarket air box and filters that are lightly oiled and mess up the MAF sensor. And check for the PROPER Factory plugs and wires being used.

amen!! Thanks for watching!

@@Doulop Do you still have your Vette?

Absolutely. Never won’t have it lol. I just made a video on it three weeks ago.

Hi Steven, so cool. I responded to your message on Instagram. Did you get it?

Hi TellMeHD, thanks so much for watching the videos. That means a lot to me. Honestly, when I was 19 (when I bought the car) I knew very little about the C4. I knew a lot about the C6 because it had just came out a few years earlier. I had no idea what I was buying. These days, I would have done a ton of research. To answer your question, I often wish I would have gotten a later year C4 with the LT1. That being said, though, I wouldn’t trade my current car for one. I love that car so much! I am definitely doing another dyno this spring as long as I can figure out why my radiator fans aren’t running. Thanks for commenting. Take care!

Uh,that would be 96 LT4. All had ZF 6 speeds.Factory rated @330hp. Most all of them,including mine,Dyno higher. They didn't want to outshine the new body style 97(C5) which was 345hp. Love the C4 content.

Thanks for the information. I appreciate it!

Shouldn’t it be 10-15% for manual, 15-20% auto? AWD vehicles are in the 20-25% range

Where do you got that Info the the Torque Converter eats more Power than a Manual Car? The Torque Converter is only active in the starting Phase, and while changing Gears. When the Gear is in, the Torque Converter is inactive, and the Car have the same Driveshaft Connection like a Manual Car.

@@kallo182 Science says the torque converter is slipping while it is working just picture a electric fan blowing against another fan that is unpowered like a pinwheel that one is the transmission while the one bolted to the flywheel is the engine. that is how a automatic transmision works. I am so glad I have a Richmond 5 speed manual in my autocross car and blast through the gears as fast as I can floor it and bang through the gears with 6500 RPM shifts !

@@lilibethdoherty295 WTF? The Torque Converter ist like a Clutch in a Manual Trasmission. It is only there to change Gears. When the Gear is changed, the Torque Converter is switched off. Like i wrote in my first Comment. You dont have to explain me how it works. I know how it works. Do you actually think the Car drive all the Time with the Torque Converter??

Wow!! That’s is awesome! Beautiful car you got there! Thanks for commenting. Take care!

The '89 and '90 ZR1s at 375 hp were actually quicker than later models, except for maybe the '93-95 with 405 hp.

Joshua Echt I would love to drive the ZR1. Epic!! Thank for commenting. Take care!

5500 shift points is fine and dandy. But L98's are out of steam and pretty much stop pulling hard at around 4500.

That’s a very tall statement lol

My year car doesn’t have adjustable TPS. Just plug and play!

@@Doulop there are two bolts that hold it on right? There are 2 arks or curved slots that the bolts are in and thats where you move the TPS.

@@Doulop if it's moved 1/32 '' that will change 5 volts on the meter it's very finicky

@@Doulop that's why the TPS has those wide slots where the bolts screw in so you can move it around up down forward back angled up angled down ect.

is your idle ok because you will notice you can turn the screw to adjust it and the computer will just go back to where it was. You need to bypass the computer unplug the idle control valve set your idle speed plug it back in then do your TPS to 5.v volts +/- .3 volts if I remember right and then it will run like you never saw it run before!!!

Heck yes!!!

Right on :)

Hi Billy, I know. I’ve seen a lot on KZfaq and never saw one like that either. It was a Mustang Dyno. That’s all I know. Thanks for commenting. Take care!

@@Doulop Do they ever adjust anything on the Dyno, or is it just for informative reasons?

Yeah, I’m assuming they are stock gears. I know nothing about gearing.

Thanks a lot! I looked him up!

Go wild with the turbo! They did a vid on engine masters where a small block Chevy nothing special with just a turbo and 12lbs boost made 500 hp!!!! They took it all the way until it exploded at like 560 with 20 lbs boost!!!

Wow!! That’s crazy!

@@sonnydemichele4903 5.3 swap with a turbo kit you would be fast as hell and around 500hp .... try to find a truck with a 5.3 2wd and swap over everything needed .... then buy one of those ebay turbo kits ....

Hey man, here is a dedicated video of it :) thanks a lot! kzfaq.info/get/bejne/nctjksdztLm9mnk.html

Hey, they are 275/40 ZR17. I hope you can get some :) I found the C5 Z06 wheels on eBay 11 years ago, lol. The tires are Nitto! Good luck!

The tires now are Nitto. Back then, they were Hankook which are way better!!

Ok. Thx. Same size as what i have on mine. yours just look like they sit better

Hmm, wonder why? I wish my car was lowered but it would be annoying for almost everywhere I drive, hahaha!

Very true!! Complete toast. I never park along a curb so I am safe that way! Thanks for the info!

Hahahahaha, lesson learned! Lol. I would love to drive something that fast. Sorry you had to get rid of it. Thanks for commenting. Take care!

@@Doulop I have the 1996 LT1. And I would trade it for a similar '91 in a heartbeat. All you are missing out on is the Optispark, and I wouldn't wish that on my worst enemy. Doesn't matter how fast it goes if it leaves you stranded without warning.

RARenfield, I’ve not heard got things about the OptiSpark. Glad I don’t have that!!

@@Doulop Seriously. You dodged a 50 cal. bullet. For a base model, you scored the perfect year C4, IMO. Five years with a C4 daily driver has been quite the education. If I had known then, I would've kept looking for a '91. No question. My theory is that they only did a band-aid fix to the Optispark after 3 years of trouble because everyone except the door hangers had moved on to the C5.

@@RARenfield my top rad hose blew and antifreeze took out my optispark left me stranded on the highway late at night cost $900 after tow and fixing it that is the only shitty thing about the LT1

Nice! Thanks a lot man! My next video will go over all those things I added. I will get her dyno’d again next year. Thanks for commenting. Take care!

45 maybe. 60, not realistic. Not with an L98. Don't get me wrong, great motor, had 2 of them. Love the torque of an L98. That's what they were designed for. 340 lbs stock, in a '90 Formula.

Amen! That’s why I wasn’t holding my breath!

Hey, thanks so much for reaching out!! I would love to help answer your questions. I am glad you like the channel. I appreciate that. In the about section of my page, is my business email. Feel free to email me :)

Hi Jack, who knows? I’m just sharing what the DYNO showed. Thanks for commenting. Take care! Merry Christmas!

incorrect, net horsepower doesn’t mean power to the wheels.

It cost me $150 and that was several years ago.

I’m not sure. Sorry man! Thanks for commenting. Take care!

I honestly have no idea. This Dyno was done over 10 years ago and I forget what it was.

Thanks a lot. It was $150 but that was 8 years ago, lol. Merry Christmas!

@@Doulop merry Christmas brother!

Thanks man!

L98

Hahaha, that was just the start :)

I am jealous of the Z06. I hope you can get your 91 in running order.

That’s awesome! I wish mine had lower miles but she still runs great! Merry Christmas!

@@Doulop I always said I would not buy something and never drive it but now I've got 11 cars in my collection that might see 10 miles a year I dont know where i went wrong

Hahahahaha!!! Sounds like a good problem to have, though :) Someday, when my wife and I get our debt paid off, I want to add another Corvette to my collection! Can’t wait

Hi Arthur! Yes, sorry, I should have mentioned that in the video. Thanks for watching and commenting. Take care!

@@Doulop no problem, after a dozen years of owning a C4 L98 and competing with the car in SCCA Autocross I have come across a number of problems, and can offer solutions but only on that specific engine and the ZF 6sp combo.

Arthur Grant, thank you! I would love to do some auto cross sometime :)

Thanks for commenting. Good to know. Happy new year!

Thanks a lot. I agree. Lots of low torque but nothing up top, for sure. Thanks for commenting. Take care!

@@Doulop do a lt1 conversion be intake

hell yeah.. they were still fun.... there tq monsters when built up

Huh??

Nope! Haha

Yes, the later C4 seats were hideous. Mine are awesome!

What year are they. Mine is a 94. I like your better.

Mine is a 1991. Yeah, I never knew the years were different until I was looking at them at the Corvette show and saw the later 90’s and I was surprised.

Hi Ryan, a cam would be sick! Maybe some day. Pretty expensive to do at this point. Thanks for commenting. Take care. Merry Christmas!!

For that type of gain you would also need some serious induction upgrades. L98s suffer from low flowing intakes.

@@jackmehoff4613 Yep, the runners where made for the 305 TPI Motor. Shorter runners and a Cam would move the power up the RPM range =More HP and Less Low end Torque.

Chrysiotis I’m actually looking to get one From 1-10 how you rate your experience with the C4 I want one for the classic look and LT1 motor Newer corvettes are too played already exception of the C7 and C8 those are cool af

@@juliobello4561 I would give it a 9 since nothing is perfect. The biggest gripe I got is that it's not the easiest car to get in and out of if you got a few extra pounds. Once inside though it feels like an airplane cockpit. If you get one get the 2 factory service manuals and the ""corvette fuel injection and engine management"" book. You can find them all on ebay. I want to know how everything works and how to do most repairs myself because we are talking 30 year old vehicles that even though are very reliable they still need maintenance and repairs. And in today's world paying a good mechanic to do your work costs a lot of money. Not every repair facility has knowledgeable mechanics to work on them. A good scanner is extremely helpful to have, I use a Snap On MT2500 found on ebay for a fraction of their original price. Great cars overall and I'm loving owning one. Yes the newest car have more horses but 300 plus a few more with easy mods are plenty for me plus 28mpg on the highway. Good luck if you get one, just buy a nice one , they are not expensive. Don't buy a beater, costs a lot of money to restore, especially interior parts.

@@juliobello4561 .

Chrysiotis, she has 115,000 now. Thanks for commenting. Glad yours runs well ;) take care!

Julio, I would definitely give the C4 a 9 or 10. Mine has been a great car. Had her for over 10 years! Take care!

Hmm, you are right. I thought it was 250. Thanks for correcting me! Thanks for watching.

@@Doulop If you are curious of the history here....and this comes straight from GM-Buick engineers, the 86 Vette was 230HP. The 86 Buick GN was 235HP. In 87 Vette was upped to 240HP. The 87 GN, with zero changes in the engine, was stated as 245HP. For ‘88 the Vette was upped to 250HP. See the trend here? Literally Buick was upping the Vette. The sole reason the ZR-1 was made was to smash the Buick GNx. I love the history here. Source for above info, Documentary Black Air. Its on youtube and its cool to listen to the people responsible for the Buick development and part of their drive was to top the Vette. Despite corporate orders not to do so. Cool stuff for C4 owners to know the lineage.

That’s why I enforced the words “says it should” hahaha because I know that’s kind of crazy. We shall see in 2020 what I currently have. Thanks for commenting, take care Dr M.

Dr M wisdom 25hp at most that’s if the part is compatible with the factory software.

That’s the first dyno I ever experienced. What was unsafe about it?

Amen!!! Loved your comment. Thanks Alan!

Thanks for your comment. I don't know. I have heard several times that cars typically lose some power with age due to wear and tear. Oh well. Mine still runs great.

@@Doulop That is a myth. Some wear and tear can actually increase power! To a point... My car is 14 years old and over 150k miles and have gone up against new cars that supposedly had more HP and mine would outpull them.

That’s awesome! I wish I could have driven my car brand new but I couldn’t. I was 2 years old. She still runs great and has great power. Thanks for your comments!

Yeah, you are right. I found that out from some others too. Thank you!

Unless the car came with the performance rear end. With that you also got the ZR1 exhaust. Were rated at 250 with that combo

People who follow my channel and watch every video do care. Sorry to disappoint. There are plenty of other C4 videos out there that have the information you’re looking for.

Yeah, pretty funny. It’s a small block, though, too. Doesn’t help.

I’d still rather drive a Vette than a raggedy Mustang any day.

Amen!!

If you get super critical, yeah, you are right. Haha! Thanks for watching! Most people I watch on KZfaq don’t consider an exhaust beyond stock but you are correct.

Thanks!