D1SC Back from the Dyno!
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D1SC Back from the Dyno! Well, after much anticipation I made it to the dyno today. ATI D1SC with the stock twins, a MMS crank pulley and a 3.85 blower pulley. Tuning was done by Rick@Synergy. After the driveability tuning, it got hooked to the dyno for some WOT pulls. Once the car got into the 4k RPM range I started seeing belt slip 
, but then we tightened it back up and made the days final run. 490HP/ 521Ft/lbs@5100 
. I was seeing 10# at 5100 on all stock internals 
Im gonna have to go back after I get a larger blower pulley. I'm thinking about going to a 4.10 blower pulley to get around 8# max. Anyone think I should go more? Heres the graph.
, but then we tightened it back up and made the days final run. 490HP/ 521Ft/lbs@5100 . I was seeing 10# at 5100 on all stock internals Im gonna have to go back after I get a larger blower pulley. I'm thinking about going to a 4.10 blower pulley to get around 8# max. Anyone think I should go more? Heres the graph. so this is all flywheel power?
Isnt that a little low for a somewhat full bolt on d1?
That would equate out to 430rwhp and 460rwtq.
Maybe im used to people running only 8 lbs on a stock block.
Isnt that a little low for a somewhat full bolt on d1?
That would equate out to 430rwhp and 460rwtq.
Maybe im used to people running only 8 lbs on a stock block.
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Originally Posted by 2000 Tran Zam
why does it say fly wheel power at the top of the graph though?
Originally Posted by SVC707
when i ever get my clutch in. if i dont get the boost i want we can trade pulleys, i have a 4.00 blower pulley 8 rib course
Originally Posted by Blackbird
for a completely stock motor I'd say your doing quite well.
how does it feel on the street? the tune makes the car really smooth doesn't it.
how does it feel on the street? the tune makes the car really smooth doesn't it.
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But for those to be flywheel numbers are impossible, the dynapack was hooked directly to my rear axel, no way to measure flywheel power.
, just b/c it was measured by the "Rear Axle" doesn't mean the dyno measured the power at the rear tires, lol
Originally Posted by T/A KID
Dyno's can read Flywheel ratings , just b/c it was measured by the "Rear Axle" doesn't mean the dyno measured the power at the rear tires, lol
, just b/c it was measured by the "Rear Axle" doesn't mean the dyno measured the power at the rear tires, lolWell that's a first for me. I've never seen a dyno, that dynos from the rear wheels and give flywheel hp!
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Originally Posted by LASTLS1
Well that's a first for me. I've never seen a dyno, that dynos from the rear wheels and give flywheel hp!
looking for flywheel numbers?
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You can see the TCF (transmission correction factor) is set to 1.00, so that is displaying horsepower directly as measured at the rear wheels. That would be 1.15-1.20 if it were trying to "simulate" flywheel power.
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Originally Posted by T/A KID
Dyno's can read Flywheel ratings , just b/c it was measured by the "Rear Axle" doesn't mean the dyno measured the power at the rear tires, lol
, just b/c it was measured by the "Rear Axle" doesn't mean the dyno measured the power at the rear tires, lolLast edited by 9silverbird8; Oct 11, 2006 at 09:00 AM.
I will simply put Chasis Dyno's Measure at the rear tires, Yes. But I have seen guys caliberate Chasis Dyno's to measure FLYWHEEL numbers as well, thats all I was getting at. I noticed on the top of the page is said Flywheel, and I just thought they caliberated it to measure at the Flywheel instead of adding in the drivetrain loss. Sorry no pun intended Really .
But I will say this, 10lbs of boost on a bolt on LS1 is not going to make 490RWHP at 5100 it will at 6000+. I dunno maybe you have a Freak Car
My tool box isn't big enough, lol 
.But I will say this, 10lbs of boost on a bolt on LS1 is not going to make 490RWHP at 5100 it will at 6000+. I dunno maybe you have a Freak Car
Now go ahead and crawl back in your toolbox with the rest of the tools.
Nice numbers.... how come you went with a 3.85 pulley to begin with?
Why is 490 unbelieveable at 5100 with 10psi?
Originally Posted by T/A KID
But I will say this, 10lbs of boost on a bolt on LS1 is not going to make 490RWHP at 5100 it will at 6000+.
RWHP #'s I only have a 4.50" Pulley & somehow I am seeing 8 to 11psi!
@6000 to 6200 RPM. I make like 5-6psi @ 5000 RPM.
Just had it dynoed a few weeks ago. 504 RWHP @ 6250 RPM!
All stock internals, Headers, No cats, Ported TB., 60LB injectors,
& Racetronix fuel pump.
@6000 to 6200 RPM. I make like 5-6psi @ 5000 RPM.
Just had it dynoed a few weeks ago. 504 RWHP @ 6250 RPM!
All stock internals, Headers, No cats, Ported TB., 60LB injectors,
& Racetronix fuel pump.