how big of a power increase with budget build up?

1994Vib.RedGT

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#1

• Sep 19, 2005

• #1

i was thinking about doing a budget buildup right now since a 331 is way out of my price range at the moment, so how much power would I pick up with a set of GT40p heads and 1.7rrs and a E or B 303 cam?

 

M

Mac-man

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#2

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subscribing....i wander the same thing. i have heard to many mixed opinions on these combo's and would like some good solid answers as well as i am sure he does too since it is his thread

 

ljinx23

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#3

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I could be off, but I would venture to say 40-50hp?

 

Killercanary

The car that set the bar.

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#4

• Sep 19, 2005

• #4

I'd expect you to be around 230ish HP at the wheels now, and from what I have seen ~270rwhp is pretty common for normal run of the mill GT40P setups with similar supporting components. Mill those heads some and you will see more.

 

1994Vib.RedGT

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#5

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Killercanary said:

I'd expect you to be around 230ish HP at the wheels now, and from what I have seen ~270rwhp is pretty common for normal run of the mill GT40P setups with similar supporting components. Mill those heads some and you will see more.

Click to expand...

haha a sort of noob question, but what exactly is milling the heads?

 

Zero Signal

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#6

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Shaves the deck down alittle. Makes it flat and reduces the combustion chamber size somewhat. You should probably do it on used heads anyway.

 

nmcgrawj

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#7

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• #7

Zero Signal said:

Shaves the deck down alittle. Makes it flat and reduces the combustion chamber size somewhat. You should probably do it on used heads anyway.

Click to expand...

To add to that, milling them will up the compression so you get more power out of the combo.

 

urban96

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#8

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yep, mine are milled .030"

 

blksn955.o

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#9

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mine are milled .060-.065

 

RIO5.0

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#10

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• #10

I went the budget route myself, Thumpers with the spring upgrade....
stock avg's around 195RWHP and I'm at 262RWHP...I have the normal base mods and run stock EEC and 19s...
Not earth shattering, but its a hella lot better than stock...

 

Grn92LX

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#11

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Buying a used gt40p head off the internet or a junkyard and you WILL be: replacing valve springs, seals and givng them a clean up mill and cc. Or cc them and mill them more to get the compression up. Thats a good $350 right there into your used "budget" head. So figure you get them for around $400 + the min of $300 you'll be pulling into them. Might as well up your budget for a good alum head assuming you wanna do it right.

The camshaft is the key to making power. The b/e cam will not be what you want.

I think my friend is still selling a set of older model edelbrock performer 5.0 alum heads. I think he wanted $600. Let me know and i'll ask him, he posts on here too.

 

nmcgrawj

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#12

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Grn92LX said:

Buying a used gt40p head off the internet or a junkyard and you WILL be: replacing valve springs, seals and givng them a clean up mill and cc. Or cc them and mill them more to get the compression up. Thats a good $350 right there into your used "budget" head. So figure you get them for around $400 + the min of $300 you'll be pulling into them. Might as well up your budget for a good alum head assuming you wanna do it right.

The camshaft is the key to making power. The b/e cam will not be what you want.

I think my friend is still selling a set of older model edelbrock performer 5.0 alum heads. I think he wanted $600. Let me know and i'll ask him, he posts on here too.

Click to expand...

You can find deals like the above mentioned all day for the performer heads and twisted wedge heads especially.