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05-08-2010, 06:44 PM
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#1
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Senior Member
Join Date: Mar 2008
Posts: 209
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Dyno Day
The Austin Stingray Sharks had a dyno day today. Cam upgrade yielded approx.70 rwhp/rwtq improvement. This 'Vette runs hard! 625rwhp/595rwtq.
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05-08-2010, 06:49 PM
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#2
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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YEEEAAAAAAAAAAHHH!!!!!!!!! Procharger baby!   |
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05-08-2010, 06:50 PM
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#3
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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You make me want to upgrade my cam. I think I'll stick with saving up for a fuel pump first though.
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05-08-2010, 11:26 PM
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#4
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Fast & Filthy
Join Date: Jun 2008
Posts: 3,840
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Great numbers! What size engine is it? Also, is that AFR correct? If so, wow that's lean.
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05-09-2010, 01:00 AM
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#5
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by 94cobra69ss396
Great numbers! What size engine is it? Also, is that AFR correct? If so, wow that's lean.
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I thought the same thing. 
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05-09-2010, 08:21 AM
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#6
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Senior Member
Join Date: Mar 2008
Posts: 209
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Vettezuki...it's my old 383. The dyno a/f sensor was way out of calibration. Same errors on all vehicles. I am running FAST fuel injection with wideband O2 sensor...it won't allow lean runs. I have the upper boost cells set between 11 and 12:1 a/f ratio.
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05-09-2010, 01:45 PM
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#7
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Next question. Are you running sticky rubber and if so, what do you have for a rear end setup (diff, hs, u-joints) to keep it from going kaboom?
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05-09-2010, 02:37 PM
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#8
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Senior Member
Join Date: Mar 2008
Posts: 209
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Quote:
Originally Posted by Vettezuki
Next question. Are you running sticky rubber and if so, what do you have for a rear end setup (diff, hs, u-joints) to keep it from going kaboom?
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Just running stock stuff, Spicer joints of course. I also have a very stiff rear spring. I have 325/50 Drag radials on her now, but i dare not dump the clutch. I did run the street tires very hard...I'm sure the diff. is on it's last legs. BTW, it smoked the drag radials on the dyno. I had to drop the air in them to stop the slipping.
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05-09-2010, 03:03 PM
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#9
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by big_G
Just running stock stuff, Spicer joints of course. I also have a very stiff rear spring. I have 325/50 Drag radials on her now, but i dare not dump the clutch. I did run the street tires very hard...I'm sure the diff. is on it's last legs. BTW, it smoked the drag radials on the dyno. I had to drop the air in them to stop the slipping.
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Launching well in a C3 is diffult. I'm at a mere 390 WHP, and there is VERY fine line between lugging and spinning the tires. I am set up very hard all around (more for handling), so that doesn't help of course. Yeah, you're diff gonna go boom if your tires hook hard. When that happens, what are you going to go to?
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05-09-2010, 03:21 PM
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#10
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Senior Member
Join Date: Mar 2008
Posts: 209
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Quote:
Originally Posted by Vettezuki
Launching well in a C3 is diffult. I'm at a mere 390 WHP, and there is VERY fine line between lugging and spinning the tires. I am set up very hard all around (more for handling), so that doesn't help of course. Yeah, you're diff gonna go boom if your tires hook hard. When that happens, what are you going to go to?
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My plan is to go to a 4L80 automatic, (I know,...sacrilegious). This will surely make for much more consistent launches...and save the drive-train at the same time. I'll rebuild and install better parts as needed.
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