desktop dyno help
Thread Starter
Racer
Joined: Dec 2004
Posts: 336
Likes: 0
From: crystal lake Il.
desktop dyno help
I`ve got a 75 l48 with performer intake,600cfm carb performer cam 204 210 at .050,dart-summit-heads,ported to match the gaskets. It`s got a 2500 stall tc & 3.70 rear, headers into true 2.5" duals, no cats or pollution control, with magnaflow mufflers.
any guess on hp with this.
how about with xe268h cam
or magnum 270h cam
any input would be greatly appreciated. Thanks
any guess on hp with this.
how about with xe268h cam
or magnum 270h cam
any input would be greatly appreciated. Thanks
Safety Car
Joined: Oct 2004
Posts: 3,923
Likes: 733
From: Youngstown Ohio
Originally Posted by painterman52
I`ve got a 75 l48 with performer intake,600cfm carb performer cam 204 210 at .050,dart-summit-heads,ported to match the gaskets. It`s got a 2500 stall tc & 3.70 rear, headers into true 2.5" duals, no cats or pollution control, with magnaflow mufflers.
any guess on hp with this.
how about with xe268h cam
or magnum 270h cam
any input would be greatly appreciated. Thanks
any guess on hp with this.
how about with xe268h cam
or magnum 270h cam
any input would be greatly appreciated. Thanks
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Originally Posted by painterman52
I don`t know the cr. those #`s look good. I also have 1.6 roller rockers. that looks like a good cam selection. Thanks for running that.
Dep
Safety Car
Joined: Oct 2004
Posts: 3,923
Likes: 733
From: Youngstown Ohio
Originally Posted by DJ Dep
Good???? They look SPECTACULAR!!!!! And that's why I don't trust those computer estimates.
Dep
Dep
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Originally Posted by C3 Stroker
The more known info you input, the more accurate your computer engine will be.....with Desktop Dyno, I used the specs of a known combo (my own 383) & the peak HP given matched mine exactly...(470 HP @ 5800 rpm).
of what it SHOULD put out? The catch is it depends on how well the person building the motor, porting the heads, etc., etc., does the work.
The computer estimate is in an IDEAL build. Often real world numbers are much less. 373 HP out of a 600 CFM carb is being VERY generous.
Dep
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by DJ Dep
Good???? They look SPECTACULAR!!!!! And that's why I don't trust those computer estimates.
Dep
Dep
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Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Originally Posted by mandm1200
I don't think the numbers are thar FAR out there. I would have thought it may have been lower, but I'm not a computer. Certainly isn't an Impala taxi engine anymore. Had this been someone starting with a 300hp or 350hp rated engine, the numbers would seem more in line with the results. However; since the engine started out as a L-48 175hp engine, some people naturally think it can't make horsepower. Most of the more intelligent forum members realize what the differences were between the mid 70 vettes versus the earlier ones. Some people just don't want to hear of a L-48 making over 350hp.
Dep
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by DJ Dep
Yep...and some people live in a dream world. When they get to the strip...they face reality
Dep
Dep
And some other people live in their own world and can't see reality either. They are quick to knock something. Not because its not true or believable, but becuase they would have done it differently and their way is not only the best way but the only way.
How quick someone run on the strip does not determine the hp of an engine.
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Originally Posted by mandm1200
And some other people live in their own world and can't see reality either. They are quick to knock something. Not because its not true or believable, but becuase they would have done it differently and their way is not only the best way but the only way.
How quick someone run on the strip does not determine the hp of an engine.
numbers that matter are the ETs. You can have 800HP, and if it doesn't hook up, it's all just so many worthless numbers.
Dep
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by DJ Dep
What good are horsepower increases if you don't USE them?
Dep
Dep
