Yet another HP combination question...

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Oct 18, 2001 | 03:53 PM

TravMsns

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Instructor

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From: Rochester NY

Yet another HP combination question...

I have a 1978 L-48 stock. would this: http://www.holley.com/HiOctn/ProdLin...K/300-502.html

along with hooker sidemount headers (http://www.holley.com/HiOctn/ProdLine/Products/ES/ESH/SdeMnt.html)

get me up to or maybe over 300 hp?

Thanks alot, you guys are a great help.

Oct 18, 2001 | 03:57 PM

scorciae

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From: boothbay maine

Re: Yet another HP combination question... (TravMsns)

you have like the same vette as me, and sounds like u are trying to do the same things, we should race in a year and see who wins

Oct 18, 2001 | 04:31 PM

daniel77350

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From: North Carolina

Re: Yet another HP combination question... (scorciae)

no I think that would get you about 250-280..that kit only gets you 65 with intake and cam...the headers will get you about 30(I think)...so thats only a 95 improvement over 180HP L.48(a 77 l.48 is 180 HP)...plus a 20% drive train loss. If you want to get HP to the ground, I suggest a Comp Cams High Energy 268H cam...that said to be good for 80-100 HP. Then the headers about 30, plus a edelbrock performer intake, about 20...that would get you over 300...it'd get you closer, thats for sure.

Just my .02 cents.

Daniel

Oct 18, 2001 | 08:14 PM

krafty79

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From: Scott AFB IL

Re: Yet another HP combination question... (daniel77350)

Trav, what is the price on that kit?
... looking at same kit in Jegs with edelbrock cam, carb (600 cfm and electric choke), and alum intake (performer rpm)
.. for about $350-400.

Oct 18, 2001 | 08:49 PM

SuperFast80

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From: Toronto

Re: Yet another HP combination question... (krafty79)

I agree, intake is necessary among other things.

Oct 18, 2001 | 09:09 PM

nunus79

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From: Honolulu Hawaii

Re: Yet another HP combination question... (TravMsns)

"SysteMAX Requirements
It's recommended that a 4-bolt main short block be used, although a good 2-bolt main short block can also be used. Minimum cylinder head valve size requirement is 1.94" intake diameter and 1.50" exhaust diameter. Compression requirement is 9.8:1. Holley testing was conducted with a 750 CFM vacuum secondary carburetor, P/N 0-3310. A good set of 1-5/8" tube headers used in conjunction with some high-flow/low back pressure mufflers won't hurt you either. If you're running an automatic transmission a 2,000-2,500 RPM stall converter will help lower drag strip times. New, top quality gaskets for your specific application are required separately and are not part of the package."

I cut & paste the above quote from the website. Note the compression ratio requirement.

Oct 18, 2001 | 10:49 PM

Nomad78SA

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From: Clarksville,Tn,USA TN

Re: Yet another HP combination question... (nunus79)

I think you would like that combo....
Neil in Tenn

Oct 19, 2001 | 10:19 AM

Ganey

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From: CORVETTE 77 385 C.I. TEXAS

Re: Yet another HP combination question...

The cam is a copy of Comp Cams CS268H. Crane has a copy too.
For your stock auto., you might be happier w/ one step down to Comp Cams XE256 for more low rpm HP. Dual plane intake, better heads, headers & free flow exhaust will put it over 300 on fresh engine rebuild even w/ 9 C/R.