462 double hump hp capability

[jeepracer]

correct i didnt state it needed to be oem headed. my fault. but it has to be under 305 inches with an oem head. everything else is all game. its going to be in a tuff truck(dirt racing). the car will be around 3400 with a turbo 350, a dana 300, and chevy half ton rears. not sure on gearing yet(there are some open straight aways and narrow points). i figured the only motors that would compare would be the scca cars of the 60's with the 302 chevys so that is what i voted to build. im just curious what the potentials are of them. also, i will be running alcohol.

[af2]

i will be running alcohol.

That alone will be tough to get to 14:1 and better to make the alcohol work.

[jeepracer]

i know its not what i origionally posted but, if i were to use 1.94 heads that are fully ported, what is its potential then? i looked over the rules and for some reason the chevy 2.02 valved heads are placed in a higher class that i dont want to be in.

[avengerengines]

At 302c.i. and with a 4" bore size, I think a 1.94 might be better than a 2.02.

[Dave Koehler]

In the right hands the 461 would be fine. Guess it will have to be, yes?
Are you limited to OEM cast iron? Cast iron being the key word here.

Here, you need this tool or it's more advanced brothers.
http://performancetrends.com/Engine-Analyzer.htm
and/or this
http://maxracesoftware.com/pipemax36xp2.htm

[Rizzle]

If it has to be oem based, use the GenIII engines.

A 4.8 is 293Cid. 3.27 stroke, 3.78 bore, and the head choices are way better. Theres also oem aluminum 5.3 blocks you can get to cut weight down for decently priced.

Yeroon

EDIT: posting or linking the exact rules would be helpful

[levisnteeshirt]

it is amazing how many tracks have rules that mandate those heads for stock classes ,,,

[ZIGGY]

One more consideration on double humps: IME circle track they are more prone to cracking on alcohol (thermal shock?).

[jeepracer]

Are you limited to OEM cast iron?

yes i am limited to oem cast iron heads.

thanks all for your input.

[rustbucket79]

Any rule against Vortec heads? Those would be my first choice.

[jeepracer]

I'm pretty sure there's no rule. Just curious, How much power will a fully potted set of vortec heads make with oem size valves on this setup?

[falcongeorge]

Mondello = oem heads reworked by Joe Mondello

....... so the low rpms dont do anything for me!

Be careful what you wish for. The term budget is about to go out the window.
Repeat: aftermarket heads.

you mean he can't just use 462 heads with Z28 springs, a big cam and rev it to 10K?

I had to check, thought I had clicked on the HAMB by mistake...

[novadude]

you mean he can't just use 462 heads with Z28 springs, a big cam and rev it to 10K?

According to some of the folks you meet at car shows and cruise nights, EVERY 283,302,327 w/ Z/28 springs, 462 heads, and a big cam was shifted at 10k rpm "back in the good 'ol days".

[avengerengines]

you mean he can't just use 462 heads with Z28 springs, a big cam and rev it to 10K?

According to some of the folks you meet at car shows and cruise nights, EVERY 283,302,327 w/ Z/28 springs, 462 heads, and a big cam was shifted at 10k rpm "back in the good 'ol days".

LOL. I've had guys tell me about the stock 265 in their 56 Chevy they had back in the day that beat everything on the street. Nothing could touch it.

[jeepracer]

So does anyone have numbers on these heads?