Yea fr ✊🏾

My pleasure

And the ford modified video was cool! It's an underbuilt machine and your proved it!!

Yeah, seriously I've been applying what you have found and shown on Ford stuff in conjunction with the stuff I've learned on Engine Masters and it is helping a ton when looking at engine math books and such to come up with my combination....this will be a mostly home build and I want everything to be as good as it is going to be and WORK. And I believe it will with what you teach and some of your colleagues teachm

Absolutely

Not to mention the best sounding 👍🏻

I used to eat those all the time back when i had my Taurus SHO, both the drag strip and highway pulls. They didn't stand a chance lol

Was that with e7 heads?

@@TommyboyGTP that 7k redline helps. And as does the part about Yamaha making some badass heads.. 220~hp and 215tq (according to a forum or 2) and that power comes on fast. Imagine if they'd have offered that little v6 in a rwd.. (it's doable buuutt..)

@@PureCountryof91 I'm pretty sure that was a very conservative power rating, and yea it pulled like a beast, and would go to 7,500 or a bit more before the cutoff. Used to rev the piss out of mine, it loved it lol

I appreciate that!

@@richardholdener1727 if you could swap in a mild 302 in anything, what would you pick and why? Not for racing but just to have for fun on the street. Like a pinto, ranger, maverick, ect?

Glad you enjoy it!

I have a 331 10:1 with a gt40 tubular, china heads, XE270 cam, aluminum china heads, shorty headers made 315whp/360 tq

Stock 5.0 cam in a 306?

You bet

I second that! Us EFI 5.8 guys don't really have a junkyard option for the lower intake, unless you're lucky enough to find a first gen Lightning in the Junkyard, which would be like hitting the jackpot. Most have to spend over $900 for the Edelbrock stuff.

it is industrial grade silly putty impregnated with silicone carbide (or even industrial diamonds on some applications)

Thats a killer set of heads. Best overall on the market imho at least for a street car

Run plenty of ported (and modded) Cobras and GT40s over the last 30 years or so-we know what they do

@@richardholdener1727 so you know a what a cut, runners shortened to peak at 6,500rpm, 2.4 mcsa, 320cfm bolted together average runner flow with a 80mm 1,100cfm throttle body tunnel flow gt40 would have made 30plus hp more than any of the tested aftermarket manifolds. To many that would be a better test because it's doing something different than buying what everyone else has bought and getting the same limitations everyone has. We have plenty of back to back testing and we have found it hard to beat a properly ported/modified gt40 manifold. This is a good test though. Keep up the great work!👍

@@richardholdener1727I’d really like to see you do one of his intakes . Everybody in the forums would like to see it .

I sold one I had on eBay for $875 two years ago. People definitely love them still. Not sure if it’s more for nostalgia or just the cool tubular looks.

@@CentralVAracer I’m new to the fox body. Just got one with shorty bbk, e303 cam and bbk cold air with flow masters. She runs out of breath at 5k rpm but feels great down low. What’s the best bang for the buck manifold?

Very welcome

Look at the Big bang Honda video that is up-along with many others (including V6s)

Not a bad idea. I’ll guesstimate that the carb will make more power up top, above 4600 RPM, and the efi will make more down low.

I did that test

I realise that you have most likely ran this test in the past as well as tons more I’m just waiting anxiously for you to share the results keep up the good work

@@richardholdener1727 have you posted it here ?

@@brettkelly1436 he did share the results

Lies. Not tuned ?

The car is ' 92 LX with a T-5. The long block combo at the time was 306 similar to the video. The cam was an E303 with 1.7s and AFR 165 58cc heads with shorty headers, off road H pipe, & electric fan. With the unported GT-40 it made 274. With the Systemax it made 334rwhp. I did port the GT 40 lower and ran that for awhile but it was a mess. It was THIN in the runners and sucked alot of oil. It made 316rwhp with that setup.

That would be cool!

Intakes do the same thing under boost-tested that many times

@@richardholdener1727 Thanks for the info

TMI

Lol

Haha i can relate 😂

Me too! 😜

depends on the intake. The long runners of the EFI would get whipped by a single plane, above 4,500 RPM. But a carb cools the intake charge with the venturi effect of its "barrels", while the typical EFI intake has so much surface area, it soaks up a ton of heat. And with the shock towers in the engine compartment blocking airflow from rad to firewall, there's a lot of engine heat to soak up.

The tube GT-40 can't be ported-but the Cobra version can

There's a guy up in Santa Rosa that does autocross in an SVO. I bought his old turbo setup. He had swapped in that 3.5 Eco. It's online somewhere.

there are a few 351W videos up

would be cool

I tested their top end kit

@@richardholdener1727 results/verdict?

I tested the RPM II vs RPM Air Gap

dual plane carb is a lot better than stock H.O. EFI

@@richardholdener1727 cheaper too, procomp intake and distributor on a 302 swapped in a 240z back in high school.

@Jeff Kopis they do make carbs for mod motors they have for years and years. You dont see it alot but they do make em.

I bought a full lunatic balanced 408 stoker kit for my 351w. I had to cheap out on the pro comp 215 heads. Sent to machine shop for springs and a good look over. Used a Ford single plane high rise. Z 303 cam tried to stay all Ford I was dumb at the time. Any way my buddy ran a 79 sunbird with a 383. We both ran a glide with 4:56 gears. Stock suspension. Tubular k member on my 89 fox lx. 2007. They were all Chevy hardcore never even built a Ford. When they saw I had to do no block grinding for my rods to clear they were amazed. Stud girdle on mains and rockers. Very similar parts on both. They thought for sure my Windsor stood no chance. That Ford made no power crap was all I heard. Double the money later on my Ford even I was questioning my route I chose. We were on small tires. Foot braking no trans brake till later. Straight cut planetary for the glide killed my trans break budget and his. Any way we went to twiggs in Macon and Savannah before it closed and ran 6.10 all day no tuning no test. Once the mustang started to come around the economy fell out. I had to sell my engine for 5,000 to a cop in Atlanta. He said straight bolt up in his 91 he ran 9.80 in the quarter. These were N/A cars. Needless to say I noticed how much power and torque that 408 made which I'm not good on the cubes it was .40 over. It was a very impressive engine. Then I drove a built 347 and man the power band would kill that 383. Anyways just reminiscing the good ole day off 2005-07.

yes

same thing happens NA and boosted

@@richardholdener1727 Did the box r make more power?

11:1 AF and very low timing

@@richardholdener1727 thank you

the lsa video is up (on an ls application)-tighter can improve power low and mid but does lose idle quality

@@richardholdener1727 how do i find that lsa vjo?

@@jlfastride1 Search for "lsa" on his channel. Here it is: kzfaq.info/get/bejne/gLt4qrl0qdDTnok.html

they make good power

no maf-it was speed density-36 or 42 pound injectors

yes-about 25 hp

Downs, Cartech, Comp and TFS all made those Box uppers

@@richardholdener1727 was it any good ? Did you test any of it ? 🤔

The box intakes are mainly used for boosted applications.

@@Bird76Mojo76 I thought as much.👌🏻😊👍🏻 Way shorter travel for that additional air and acts as a surge box too.

Jeff Kopis if you would have read what I posted I was wanting to the see 2 bbl 289 vs the Hi Po vs the Shelby. Not just him putting these same parts on a 289. It would kinda be like another other guys cause to many people forget about the 289

There is a HiPo 289 video up

Richard Holdener I went back through the videos and didn’t seem to find it

gt-40 will make less

@@richardholdener1727 by a substantial ammount?

Port the upper and lower.. game changer. Will flow as much if not more than any of the after market intakes for have the price and "look" stock

@@19jody72 Lol, you can't really port the upper since it incorporates thin-wall tubes. But, you can port the Explorer intake which flows similar to the GT-40.

@@231mac lmao...Yeah, I meant the explorer intake.

porting the Explorer for additional flow will not allow it to make power like the RPM II or Systemax (porting does not change runner length)

@@richardholdener1727 so are you saying a ported upper and lower explorer intake will not make more power thN a stock one? EDIT: you are the professional Richard, but that is simply not true. I know for a fact it does make more power than a stock out of the box rpmll. I know it doesn't change runner length....but it does increase airflow which increases power as we all know.. as long as uts all matched of course

I second this! 👍

I've run those-they work very well

doing this test (2003)-started back with my 1988 5.0L LX (original owner-still have it)

You can't tell a guy at car show did it on blown big block

it works fine

@@richardholdener1727 You deserve to get paid for these videos

Richard Holdener What if the valves were different sizes, wouldn’t it pump to much pressure in a chamber and overwork the rotating assembly

It just runs a little funny if the ports are mismatched but as long as the intake seals and it gets fuel and spark at the right times it'll run just fine

Hi would be better than box

Hartman powerbox, then Comp bought them I think.

Stop thinking in terms of flow-the intake is not flow-its reflected waves that enhance cylinder filling (like boost) at specific engine speeds

350 whp? 351W with junkyard GT40 heads, cam, springs-then add boost or nitrous

yes with piston-you need springs, rockers are a good idea

i have one

STOCK INTAKE IS RESTRICTIVE AND LONGER RUNNER

@@richardholdener1727 is it really more restrictive than the heads though? I thought the stock heads only flowed like 145cfm, surely the intake flows better than that

@@richardholdener1727 sorry, I totally had it backwards, the intake is 145cfm, heads at around 160cfm

there should be smog legal parts for that application

we didn't start at 225-that's a rated hp number

@@richardholdener1727 ok, I had seen that the first Dyno was more than stock but I thought the expectation was that the motor was effectively stock with long tubes. Figured that made the end result a stock bottom end (effectively) with h/c/i... And I guess long tubes too. But I guess if we were stacking hp, that'd be another 30 hp there. Lol. I was just joking around. Great video. Hope to see more.

Bobby4v - most likely the answer is yes, it would theoretically shift the usable power band down a little bit in the Rpm scale and bump your TQ if I’m not mistaken.

1/2 inch changes it very little

junkyard