Whose making the most power with Factory GM casting heads?

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Apr 9, 2010 | 01:24 PM

stock48

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From: Colorado Springs, Co/ Central, Ca

Whose making the most power with Factory GM casting heads?

Just wondering whos making big power with 241, 243, or 317 heads. How much RWHP, ET, weight, and boost! Thank's J

Apr 9, 2010 | 03:43 PM

stevieturbo

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From: Norn Iron

camaroandreas is doing well.

Apr 9, 2010 | 03:43 PM

BIG_MIKE2005

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From: Skiatook, OK

I have seen several guys on here make 700+RWHP with stock cast 317 heads with just a good double spring kit.

Apr 10, 2010 | 05:05 AM

stock48

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From: Colorado Springs, Co/ Central, Ca

Cool He's running O rings correct? Anybody 1200+ on with factory, or MLS gaskets?

Apr 10, 2010 | 05:18 AM

elias_799

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From: toronto ontario canada

no o rings or 6 bolt head will not live too long at 12000whp.

you will need to be changing head gaskets like underwear

Apr 12, 2010 | 07:26 AM

dudeman

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i am shooting for 1000 fwhp with stock 317's a spring kit and ls3 gaskets. i will find out soon enough

Apr 12, 2010 | 08:15 AM

stock48

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From: Colorado Springs, Co/ Central, Ca

Im running mid 9's @143+MPH in a 4900lb 4x4 truck with a set of 317's on 20psi

I know it is probably on borrowed time just wanting to know what others are getting away with.

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Apr 12, 2010 | 12:29 PM

HydroStream6

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Oh and camaroandres is running a fire ringed block.

Apr 12, 2010 | 01:40 PM

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black98ws6ta

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From: louisville,ky

Quote:

Originally Posted by elias_799

no o rings or 6 bolt head will not live too long at 12000whp.

you will need to be changing head gaskets like underwear

Yeah, for 12,000 rwhp your going to need 12 bolt heads, lol. I agree with his post when you remove the typo.

My car made 920 rwhp on a mustang dyno in race form (29.5 tall slicks) on stock 317's

Last edited by black98ws6ta; Apr 14, 2010 at 12:14 AM.

Apr 13, 2010 | 08:37 PM

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02blackbeauty19

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From: Shreveport, Louisiana

I make 768rwhp @ 14psi with stock 317 heads and dual springs

Apr 14, 2010 | 11:33 AM

#12

dudeman

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From: texas

Quote:

Originally Posted by 02blackbeauty19

I make 768rwhp @ 14psi with stock 317 heads and dual springs

supercharged or turbo? what size turbo or supercharger? what motor?

Apr 14, 2010 | 11:47 AM

#13

02blackbeauty19

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From: Shreveport, Louisiana

Quote:

Originally Posted by dudeman

supercharged or turbo? what size turbo or supercharger? what motor?

APS twin turbo on an 347ci motor with a Dallas Performance stage II turbo cam and I also run meth injection.

Apr 15, 2010 | 12:44 PM

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slow67

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From: DFW

Harlan ran 8.1x at 17xmph with ported 317s
NA$TY TA dynoed at 1132rwhp with ported 317s
As mentioned earlier, camaroandreas dynoed (engine dyno) at 1360hp

Apr 15, 2010 | 08:22 PM

#15

COPO9560

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Anyone got any numbers for L92 heads they could share?

Apr 16, 2010 | 05:02 AM

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stock48

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From: Colorado Springs, Co/ Central, Ca

Quote:

Originally Posted by slow67

Harlan ran 8.1x at 17xmph with ported 317s
NA$TY TA dynoed at 1132rwhp with ported 317s
As mentioned earlier, camaroandreas dynoed (engine dyno) at 1360hp

I think Im right up there with them. Not pushing water or anything, but sure seems like there is a lot of psi in the cooling system after I ream it good. Doesnt seem to do it below 20psi. Did they run long at this power level, any gasket problems?

Apr 16, 2010 | 07:13 AM

#17

dudeman

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From: texas

what head gaskets do you run?

Apr 16, 2010 | 10:24 AM

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Avengeance

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From: NorCal

I think now we know the 317s are up to it.... next question... what head gaskets are all the big HP/PSI guys using?

(Not trying to hijack but its a viable Q.)

Apr 16, 2010 | 12:08 PM

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HydroStream6

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From: Rochester, NY

From all the research I've done, the GM MLS gaskets are pretty damn consistent. I ran them for 4 years before and I'm running them again this season with my new heads!

Apr 16, 2010 | 12:51 PM

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NA$TY-TA

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From: San Antonio, TX

Quote:

Originally Posted by slow67

Harlan ran 8.1x at 17xmph with ported 317s
NA$TY TA dynoed at 1132rwhp with ported 317s
As mentioned earlier, camaroandreas dynoed (engine dyno) at 1360hp

We did 1132rwhp on the dyno at right around 25-26 psi.
S88 Turbo,370ci motor, stock crank, Ported 317's, MLS Gaskets,Patriot double springs, 224/220 cam. Thru a Powerglide and S60 rearend and 325/50's.

At the track it would run all day with out pushing water ie(lifting the heads, preasurizing coolant system) at 20psi. It ran a 6.27 1/8 @ 119, 9.26@150 like that.

On the 1132rwhp pull it pushed water on the dyno.
Ran it at the track like that... 5.89 1/8 @ 127 and popped the head gasket and rolled to a 9.7 @137. Race weight was around 3350#

Kyle

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Whose making the most power with Factory GM casting heads?

Whose making the most power with Factory GM casting heads?

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