Can Someone please do a test for me?
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Can Someone please do a test for me?
hi i was wondering if anyone with desktop dyno could run a test for me to see how much power the parts listed would make on a bone stock 1974 390
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
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From: Smith Mountain Lake, VA
Originally Posted by Fordever2
hi i was wondering if anyone with desktop dyno could run a test for me to see how much power the parts listed would make on a bone stock 1974 390
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
Your Cam is the Heart beat of your Engine....Match your Comp..to a nice cam and go from there.....
Whats the Goal of this build??
Russ
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Joined: Jan 2003
Posts: 8,600
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From: Iowa
Originally Posted by Fordever2
hi i was wondering if anyone with desktop dyno could run a test for me to see how much power the parts listed would make on a bone stock 1974 390
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
Holley 4bbl 650 cfm carb
hooker competition headers
edelbrock victor fe intake manifold
and a good sized k&n air filter with ported and polished stock heads
If you want my opinion, you shold increase compression with a set of 360 pistons. Also have the heads milled down to 65cc, and have the intake milled to match. This would get you 10.1:1 compression. Then run a big cam, like the Crane 344621. This would get you 453hp @ 6500rpm, and 425ft-lbs @ 5000rpm. It would better match your other components, specifically your intake manifold. That cam recommends 10.0 - 11.5 compression, and you'd be on the low end of that, so I think you could still get by with pump gas.
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Joined: Nov 2002
Posts: 3,447
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From: Littleton, CO
Originally Posted by rusty70f100
348hp @ 5000rpm, 404ft-lbs @ 4000rpm.
348 seems a little fishy to me, but then I don't use the DD stuff, just for this false sense if security.
My $.02's --Mike
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thanks i wat thinking about that cam you listed it has a rough idle right? and i was going to try to get a 9.5 or 10-1 compresion. im still learning things i can do i am only 15 so if i get head work done and flat top pistons do you think i can run a big cam?i want one that has a really rough idle
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rough like you can really feel the revs and boddy shake but nothing that has to have the compresson over 10.5-1
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From: Iowa
The 348801, although a good cam, is a bit mild for what you're trying to do. It also has a big dual pattern, meaning that it has a much larger duration on the exhaust than the intake. This is good for stock unported heads, but for ported heads you'll want to close this up a bit. The one I listed is much closer to a single pattern, and I think it would work a lot better with stock heads. Crane lists it as fair idle, which really means it will sound choppy. They list the 801 as good idle. The 344621 that I listed has lift that wont be too much for a stock setup either. If I had it to do again, it is the cam I'd probably go with.
Edit: Here's the specs for the 344621:
296* intake / 300* exhaust duration
.554" intake / .563" exhaust lift
Description: "FAIR IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, 3800-4200 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6200"
Here's the specs for the 343801:
278* intake / 290* exhaust duration
.548" intake / .580" exhaust lift
Description: "GOOD IDLE, DAILY PERFORMANCE USAGE, MILD BRACKET RACING, 3000-3400 CRUISE RPM, 9.5-10.75 COMPRESSION RATIO ADVISED. BASIC RPM 2200-5200"
Edit: Here's the specs for the 344621:
296* intake / 300* exhaust duration
.554" intake / .563" exhaust lift
Description: "FAIR IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, 3800-4200 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6200"
Here's the specs for the 343801:
278* intake / 290* exhaust duration
.548" intake / .580" exhaust lift
Description: "GOOD IDLE, DAILY PERFORMANCE USAGE, MILD BRACKET RACING, 3000-3400 CRUISE RPM, 9.5-10.75 COMPRESSION RATIO ADVISED. BASIC RPM 2200-5200"
Last edited by rusty70f100; Mar 31, 2005 at 06:07 PM.
