Comp Cams XR276HR - Sounds Great with Open Headers!

Comp Cams XR276HR - Sounds Great with Open Headers! - 1965 GTO 389

Рет қаралды 4,995

Күн бұрын

Пікірлер: 53

@user-bc9sz1dj1g 2 ай бұрын

Hey AG, Tim here, ur Poncho nut, just commented back on the dude that gave ya flack on 3 tube headers.....I KNOW PONCHO'S.....for a stock/mild build, we know 3 tubes are fine, AND ur gonna run on Dyno with Exh manifolds.....some folks dont get it...NEVER are the pulses fightin each other, and it wud be FINE in a stock styled machine.......i like what i see, u've done a FINE job!!!......the 276 roller is PERFECT for ur customers application..... once again, proper homework was done!!!!...its not a bracket race car, its gonna be a driver......NICE JOB AG......love it!!!

@goldsgarage8236 2 ай бұрын

Thanks for your comments as always Tim. AG

@mickangio16 2 ай бұрын

Yessir! And unique classic souped up Pontiac sound. You can't really appreciate it until you hear it driving in the car. Some may not like it but I dig it and know that is a fiesty Injun when I hear it.

@blake86303 2 ай бұрын

I had a '65 Goat I bought after coming home from Vietnam. Same color. Wish I still had it!

@goldsgarage8236 Ай бұрын

Great memory Blake. Thanks for sharing.AG

@kevinclemence4661 2 ай бұрын

I have to say it proved to be an excellent cam for my 350 SBC as well. Combined it with a set of factory Vortecs, 10:1 compression and it it pushed my 3600 lb street Camaro into the 12's. Better still it was making good top end power going 106 MPH. I went coast to coast with the same car too. Keep up the good work Mr G.

@bobbyhackney988 2 ай бұрын

I’m on the edge of my seat for the dyno video. Keep the Pontiacs coming

@goldsgarage8236 2 ай бұрын

Thanks Bobby, July 13. AG

@danballou2202 2 ай бұрын

Love your video's. You are in my regular rotation.

@goldsgarage8236 2 ай бұрын

I appreciate that. AG

@mickangio16 2 ай бұрын

My first car was a 1964 GTO 389/4 spd that I bought from a guy that was a supervisor at Borg Warner. He was real good at tuning cars and it had a brand new trans in it, so you know it was a real runner. Unfortunately, I was a maniac, tore it up, & sold it. My next car was a '64 Polara 500 383/4 spd. That car held up better to my abuse and I became a Mopar lover after that, owning many cars that are just dream cars now. I did own another GTO in the late 1970s, though. A '68 400/automatic. That was a real goody, too.

@stevenbean9706 2 ай бұрын

cant beat the 383 or 426 low deck

@phildo39645 2 ай бұрын

Nice job Allen! Sounds good, that starter will last forever starting that easy.. 👍🏻 Looking forward to dyno day!

@toddbrown2236 2 ай бұрын

The engine sounds great, Allan. Thanks for posting the video. Looking forward to Dyno day!

@goldsgarage8236 2 ай бұрын

Me too, thanks Todd. AG

@billlittle4285 2 ай бұрын

Sounds very nice, response is good, good job Allan!!

@goldsgarage8236 2 ай бұрын

Thanks Bill! Good selection of parts. AG

@gregcampbell3064 2 ай бұрын

This is coming from a Chevy guy, I am digging the Poncho power vibe! Always liked Pontiacs.

@goldsgarage8236 2 ай бұрын

Thanks Greg, Pontiacs have always had a strong following. Remember the Beach boys song, My Little GTO? AG

@toddbrown2236 2 ай бұрын

@@goldsgarage8236 Great song but 'Little GTO' is a song written by John Buck Wilkin and performed by his band, Ronnie and the Daytonas.

@shadvan9494 2 ай бұрын

I am running a XM276HR in my 1971 Camaro SS 396. it's a killer street cam. the XM276HR is the Marine version of the XR276HR. the spec is almost identical, only they widened the LSA. the XR276HR has a 110-degree LSA and the XM276HR has a 112-degree LSA. the wider LSA makes more vacuum for power breaks and the idle is not as choppy. it also widens the rpm range between peak torque and peak horsepower. which is much better in a street driven car. if I was building street strip car, then the 110 LSA would be better. for an all-out race engine, i would go even smaller, like 108 or 106. depending on displacement.

@goldsgarage8236 2 ай бұрын

Thanks for your thoughts. AG

@steelcitycaprice.899 2 ай бұрын

Sounds really good!!🎶🎵🎶👍🏽😎🏁🏁🏁

@goldsgarage8236 2 ай бұрын

Thanks for listening. AG

@kimmorrison9169 2 ай бұрын

fires up fast and smooth as silk Allen. Curious what the HR cam will do for an otherwise stock engine. We await dyno testing

@goldsgarage8236 2 ай бұрын

Thanks Kim. AG

@elainestamper3873 2 ай бұрын

Good video! Good luck getting the performer RPM to fit under the hood of the 65 GTO, tried one on my TransAm with duel snorkel Formula hood (70-73 hood) and couldn’t shut the hood with just the carburetor in place no air cleaner! Very disappointing day had to put the old intake back on!

@kimmorrison9169 2 ай бұрын

yeah, got the same problem with my 396 Nova. No damn space with the Super Sport (non cowl) hood.

@strokersteve468 2 ай бұрын

An Edelbrock performer with a 4150 style carb fits under my 70 formula hood, with a proper air cleaner .

@toddbrown2236 2 ай бұрын

The engine had a Performer RPM manifold on it when I removed the engine from the car for rebuild and there were no clearance issues. I haven't measured the difference in height with this new manifold but I'm guessing they're similar. In any case we'll know for sure when I reinstall it in the car later this summer.

@user-hg8iv9fl1z 2 ай бұрын

When you take that engine to the Dyno could you do a quick test between stock log exhaust manifolds and the three tube header that’s on the engine now thank you

@mariocooldude9092 2 ай бұрын

I can't believe cams are over $500 now 😢 glad I got mine years ago

@goldsgarage8236 2 ай бұрын

Thanks Mario, the only problem with roller cams is that they are expensive. AG

@jimclarke1108 2 ай бұрын

Excellent

@goldsgarage8236 2 ай бұрын

Thanks Jim. AG

@mrho4speed 2 ай бұрын

Tell us about the cam.... lift, duration, LSA etc and love to know more about the application = for a street driven car and maybe a quarter mile run once in awhile??

@goldsgarage8236 2 ай бұрын

The COMP 276HR (Hydraulic roller) has .503/.510 lift. 224/230 duration @.050. 110 lobe separation. installed at 106ICL , 4 degrees advance ground in. AG

@juliangrant1536 2 ай бұрын

I may have missed it when the build was discussed. Which heads are you running on this motor?

@baconunteggs 2 ай бұрын

Can't wait to see this on the Dyno! :)

@goldsgarage8236 2 ай бұрын

Me too, thanks Bacon. AG

@davecorreira3886 2 ай бұрын

what's the Quench clearance?

@goldsgarage8236 2 ай бұрын

.040=.042" AG

@leonardfoster6252 2 ай бұрын

On a big block you will find it will make the most power on 109° LC... Although the weight of the car does make a difference.

@goldsgarage8236 2 ай бұрын

Thanks for the comment Leonard. AG

@darylthisdelle7702 2 ай бұрын

Hey tell Frankie Eight barrel says hi, if you don’t mind…

@goldsgarage8236 2 ай бұрын

For sure, i will do that. Thanks AG

@Charger1908 2 ай бұрын

What’s up with the three tube headers? Can’t you use 4? Those headers look like they’ve been to hell and back.

@goldsgarage8236 2 ай бұрын

they are shop headers for start up. The engine will be dynoed with the Pontiac manifolds. AG

@user-bc9sz1dj1g 2 ай бұрын

3 tube headers are VERY common in the pontiac world, if you know.,.....YES 4 tubes are better, but in a pinch, and for what AG Is doin, 3 tubes are fine.....it aint a bracket race motor, and breathes still better than manifolds!!

@Charger1908 2 ай бұрын

@@user-bc9sz1dj1gactually it was meant as a joke that obviously he didn’t get. Have you ever tried to bolt up 4 tube Pontiac headers? The center two are almost impossible to get in the holes and once you do they’re almost impossible to get a wrench on. I was laughing my ass off thinking about it when I wrote him. Golds garage is a great place.

@goldsgarage8236 2 ай бұрын

thanks for the follow up Charger? AG

@user-bc9sz1dj1g 2 ай бұрын

@@Charger1908 yes my 462 (455) has 4 tube Super Comps on it ('64 Tempest post).....and YES they are a MF'r......i made/modified a cupla wrenches, the inner fenders wells gotta be out, and its STILL a MF'r.....but once done, BOY its nice to let it breath.....after 5 years i got a tick on the right bank.....got the gaskets, but i'm procrasinating doin it, cuz its SUCH an absolute BEAR to get done......Weeeeeee!!!.haha

@AlexJonesWasRight1776 2 ай бұрын

Alight engine sound judges how's my 400 SBC with 28 year comp cam 268 HE sound in this short 20 sec clip yes that right back when comp cams made cams that dont go flat I run 4 degrees advanced on chain stock home ported iron heads 650 cfm AVS 2 Carb and a now swapped out old HEI home tuned for a Progressive Ignition drop in HEI you guys should check them out no more springs or weights to mess with for timing no vacuum advance to mess with its all tuned by you at home on your provided app on tablet or phone once you tune your own curve on the fly you dont need the app anymore unless you want to live time load new tune modes. Its an incredible setup comes ready to run baseline start up tune then just go out and drive and adjust on the fly. I found out my engine likes 24degrees at idle 640RPM 50 degrees all in at 2400 RPM the torque is incredible. kzfaq.info/get/bejne/mZl2fcSCqay8g58.html