New engine build, what heads???? - Team Camaro Tech
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post #1 of 10 (permalink) Old Mar 29th, 10, 06:08 PM Thread Starter
 
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Exclamation New engine build, what heads????

Ok so i rebuilt my 350 i had, it has stock crank and rods, .040 over pistons, high pressure and volume oil pumps, lunati voodoo cam with 0.525 int./0.546 exh. lift,pro comp roller rockers, edelbrock victor jr intake, and edelbrock 750cfm carb.

Now my question is what do you guys think are the best for the money iron or aluminum heads?? For $1400 or less, i want to run a 150 shot of nitrous next year, so something that can handle that down the road. let me know what you guys think i should do, thanks.
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post #2 of 10 (permalink) Old Mar 29th, 10, 08:48 PM
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Tom
 
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Smile Re: New engine build, what heads????

AFR's are about the best you can buy. I'm not sure if $1400 is enough. They are about $1500.

http://www.summitracing.com/parts/AFR-1040/

RHS Pro Action heads also flow great and are a little less money.

http://www.summitracing.com/parts/RHS-12044-01/

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1

Last edited by TJS69; Mar 29th, 10 at 09:02 PM.
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post #3 of 10 (permalink) Old Mar 30th, 10, 12:11 AM
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Re: New engine build, what heads????

AFR, BRODIX, GM Fastburn, CANFIELD are all great, I would avoid dart, they are expenive, and from what I've seen first hand, they do not perform.

I'd lose the edelbrock carb quick, especially if your wanting a performance build, which this seems to be.

What size stud do the rockers require, 3/8's or the larger ones? Many good aftermarket heads accept the larger ones, and I've snapped 3/8's studs with as little as .490" lift.

The only Mustang I'd ever own is a Fender.

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post #4 of 10 (permalink) Old Mar 30th, 10, 05:22 AM
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Re: New engine build, what heads????

Do a search on those Harbor Freight rockers. Many have broken, some even taking out complete engines. Harland Sharp is the best budget roller rocker made.

Brodix IK heads should work well and fit your budget.

Ditto on ace's Edeljoke carb comment, they're not a performance piece.

Gary Adrian
FCS Harmony Racing

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post #5 of 10 (permalink) Old Mar 30th, 10, 06:22 AM
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Re: New engine build, what heads????

http://www.profilerperformance.com/sbc-heads-176.html

I just an bought a set of these last Monday for 998 + frt. American made and Darrin Morgan designed . I don't have them yet. Don't order them off the net, as the part#'s are fubard and you'd get 2.08's which is NOT what you want for a 4" engine.

But 2.08's is only 30 bux more

The springs are 115# seat and 335# at .650. I may have to swap springs depending on the cam I use which is undecided yet. It will be awhile before I know how these heads perform.

Tim Smith
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post #6 of 10 (permalink) Old Apr 5th, 10, 06:33 PM Thread Starter
 
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Re: New engine build, what heads????

ok now for future refference do i want 64cc combustion chamber or 70cc for the nitrous in the future
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post #7 of 10 (permalink) Old Apr 5th, 10, 07:45 PM
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Re: New engine build, what heads????

I APOLOGIZE FOR LARGE CAPS IM NOT YELLING, THE KEYBOARD ON THIS COMPUTER IS BROKE.

HEADS AND COMPRESSION DONT REALLY MATTER UNTIL YOU WANNA fine tune AND RACE AT THE TRACK. tHE ONLY THING YOU NEED TO WORRY ABOUT BREAKING ON YOUR ENGINE IS THE PISTONS-PREDETENATION AND BURN A HOLE AND HAVE TO REBUILD ENGINE OR CRACK THE RODS OR CRANK AND THUS HAVE TO REBUILD ENGINE ANY WAY.

SO, ARE YOUR PISTONS AND BOTTOM END CAPABLE OF HANDLING THE NX YOU PLAN TO USE? STOCK PISTONS AND MOST BOTTOM ENDS ARE GOOD TO 100-125HP SHOT OF NX. NX=NITROUS

AE2(AW) Harley Moody, USNavy
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post #8 of 10 (permalink) Old Apr 5th, 10, 07:47 PM
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Re: New engine build, what heads????

Juice is off most of the time but you always have to live with how the engine behaves the rest of the time. Most don't alter cr around juice use, that's done for blowers/turbos. For nitrous you build the bottom to handle the level you choose. Stuff like pistons/rods/cranks/ring gap gets more critical as the shot gets larger. And heavy hitters will use nitrous cams(think over 300 hp hit here).

Tell us your cam specs and more about your pistons so we can make a SWAG for ya on the head cc because all you said was .040 over and we kinda need to know if they are flat or dished or dome because that can make a significant difference in your cr.

Tim Smith
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post #9 of 10 (permalink) Old Apr 5th, 10, 07:47 PM
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Steiner
 
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Re: New engine build, what heads????

I'm very happy with what the AFR's did on the dyno with my setup. You would need to calculate your static and dynamic compression ratios with the different head cc's to find what will be best for you. KB Silvolite has a good calculator on their site. With as much cam as you're running, the 64cc would probably be OK with flat tops or domes of the right size.

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Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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Last edited by Steiner; Apr 5th, 10 at 11:38 PM.
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post #10 of 10 (permalink) Old Apr 5th, 10, 11:22 PM
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AJ
 
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Re: New engine build, what heads????

I wouldn't go under 10.5:1, especially with as big as I would expect the duration to be on that cam, bet it would love 11:1.
Agreed about not dropping cr for nitrous, just watch the timing.

The only Mustang I'd ever own is a Fender.

'68 333" Camaro
'14 5.0 Mustang
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