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Old 01-23-2006, 11:40 AM
84Z 84Z is offline
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Header size question for engine on budget?

My engine has about 600 to the crank at 6400, and I'm goign to spray another 300 through that. I wanted to get some hooker super competition long tube (1 3/4" primary, 3" collector) but with my budget, I can't really afford those. If I were to go with hedman long tube headers (1 5/8" primary, 3" collector), which are a couple hundred cheaper, how bad would the hit be to my power? Would I be better up saving for a few months to get the super comps? I need to get other stuff for my car as well, so all the money I can save would help very much, but then again if it'll kill my power significantly, then I'll rethink it. What do you guys think, thanks.

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Old 01-23-2006, 12:08 PM
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How did you arrive at the 600 figure without headers? It's hard to dyno an engine without them.
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Old 01-23-2006, 12:09 PM
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1 5/8 will crush your power if you are in fact making 600 to the crank. I would estimate 50-100 HP and a ton of torque as well. Spraying 300 on top of this I would be looking at 1 7/8 or 2" with around a 32" long tube.
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Old 01-23-2006, 12:19 PM
84Z 84Z is offline
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Quote:
Originally Posted by onovakind67
How did you arrive at the 600 figure without headers? It's hard to dyno an engine without them.
Bought the engine from someone and he provided the dyno sheet
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Old 01-23-2006, 12:28 PM
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headers

save the money and buy the correct headers...

Keith
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Old 01-23-2006, 01:14 PM
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Quote:
Originally Posted by 84Z
Bought the engine from someone and he provided the dyno sheet
How could you afford to buy this engine, but cant afford the headers? Sounds like if the engine makes 600 HP and can take a spray of 300 HP it must have cost a good amount to build and or buy.
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Old 01-23-2006, 02:12 PM
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What size are the exhaust valves?
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Old 01-23-2006, 04:08 PM
84Z 84Z is offline
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Quote:
Originally Posted by 1931 steve
How could you afford to buy this engine, but cant afford the headers? Sounds like if the engine makes 600 HP and can take a spray of 300 HP it must have cost a good amount to build and or buy.
I'm college and worked all summer for it.. Can't work now so I have no income, just old parts to sell.
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Old 01-23-2006, 04:09 PM
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Quote:
Originally Posted by 56Maynard
What size are the exhaust valves?
Brodix track 1 heads, 1.6" exhaust
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Old 01-23-2006, 04:54 PM
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I'd like know how those heads can support 600hp?


Even with 17:1 CR I couldn't do it. We used to roll them over .150 to straighten the intake angle and couldn't do it then either.

Are you sure somone hasn't playing with the dyno?

Can you post your sheet?

I'm just curious really?
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Old 01-23-2006, 05:01 PM
84Z 84Z is offline
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Quote:
Originally Posted by johnsongrass1
I'd like know how those heads can support 600hp?


Even with 17:1 CR I couldn't do it. We used to roll them over .150 to straighten the intake angle and couldn't do it then either.

Are you sure somone hasn't playing with the dyno?

Can you post your sheet?

I'm just curious really?
The dyno sheets at my house, but I did see the engine run on the dyno and it went 597 at 6400, that was with a small blower that started choking the engine, another dyno run wasnt made when the blower was removed. I seriously doubt the blower helped much, wasnt running much psi due to compression and as I said it was small. I just use the numbers because it's the only thing I have to go on, and with a matter like this, it's better to over estimate then under.
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Old 01-23-2006, 05:34 PM
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I would save up for the super comps. You will just be throwing your money away if you buy the 1 5/8. And hurting the engine rather than helping.
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