Dyno!
Race Director
Joined: Dec 2002
Posts: 13,348
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Look at the scales...they don't seem to cross at all, nor should they, since engine rpm never reached the crosspoint of 5252rpm.
The question should be "why does this engine run out of breath at less than 5000rpm?" What cam is in it?
I don't think the TB will help much, but be sure to let us see today's chart.
Larry
code5coupe
The question should be "why does this engine run out of breath at less than 5000rpm?" What cam is in it?
I don't think the TB will help much, but be sure to let us see today's chart.
Larry
code5coupe
Thread Starter
Pro
Joined: Jun 2004
Posts: 646
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From: Santee Ca
Dyno results are in
After the dyno run today I got my chart. After putting the 52mm throttle body on I gained -6 rwhp and -17 rwtq. All this work netted me +15 rwhp and -3 rwtq over the stock intake system.
I know there has to be more in this motor someplace. Just not sure if I want to change the cam or the pistons. I don't have the text printout. I forgot to get it from the shop before I left. I am going to pick it up tomorrow.
With the 52mm throttle body I ghained torque in the lower RPMs over the stock 48mm.
Air temp was only about 2 degrees different in the tests and the humidity was the same
I know there has to be more in this motor someplace. Just not sure if I want to change the cam or the pistons. I don't have the text printout. I forgot to get it from the shop before I left. I am going to pick it up tomorrow.
With the 52mm throttle body I ghained torque in the lower RPMs over the stock 48mm.
Air temp was only about 2 degrees different in the tests and the humidity was the same
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Thread Starter
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Joined: Jun 2004
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From: Santee Ca
Originally Posted by MrNuke
Looks like they're crossing at about 4800rpms..
Is this on a modified LT1?
Is this on a modified LT1?
Thread Starter
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Joined: Jun 2004
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From: Santee Ca
It has been tuned. Not on a dyno but Alvin has been doing the work for me. He says that everything looks good to him on the scans but he can't figure out where all the horsepower is going.
I think my motor is all wrong. I have dish pistons and 76cc heads so it is probably way low on compression. I need to either raise the compression or lower the cam. I only have about 12" vacuum @ idle. Intake dur is 270 and exh is 290. Lift about .469 int and .491 exh. I need to be able to pass California smog. Not sure I would do that currently. This is also a non-roller motor.
I think my motor is all wrong. I have dish pistons and 76cc heads so it is probably way low on compression. I need to either raise the compression or lower the cam. I only have about 12" vacuum @ idle. Intake dur is 270 and exh is 290. Lift about .469 int and .491 exh. I need to be able to pass California smog. Not sure I would do that currently. This is also a non-roller motor.
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by prcollin
where do you get the dynomometer **** done in massachusetts???
508 336 6588
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by Insane1
It has been tuned. Not on a dyno but Alvin has been doing the work for me. He says that everything looks good to him on the scans but he can't figure out where all the horsepower is going.
I think my motor is all wrong. I have dish pistons and 76cc heads so it is probably way low on compression. I need to either raise the compression or lower the cam. I only have about 12" vacuum @ idle. Intake dur is 270 and exh is 290. Lift about .469 int and .491 exh. I need to be able to pass California smog. Not sure I would do that currently. This is also a non-roller motor.
I think my motor is all wrong. I have dish pistons and 76cc heads so it is probably way low on compression. I need to either raise the compression or lower the cam. I only have about 12" vacuum @ idle. Intake dur is 270 and exh is 290. Lift about .469 int and .491 exh. I need to be able to pass California smog. Not sure I would do that currently. This is also a non-roller motor.