Dyno Results
Thread Starter
Pro
Joined: Feb 2004
Posts: 631
Likes: 41
From: Tampa FL
Dyno Results
Well, I hit the dyno yesterday - it was 95 degrees out with 95% humidity but I was still a little disappointed with the results (259/362) after feeling such a difference in the "butt dyno" after the tuning.
The shop owner told me to mess with my air valve to keep the secondaries from opening too soon so I will try that but with these numbers I am even more leaning towards a new cam and heads (maybe next year
The stock heads and somewhat mild cam I feel must be my biggest holdback now
Dyno
enjoy...
The shop owner told me to mess with my air valve to keep the secondaries from opening too soon so I will try that but with these numbers I am even more leaning towards a new cam and heads (maybe next year
The stock heads and somewhat mild cam I feel must be my biggest holdback now
Dyno
enjoy...
Thread Starter
Pro
Joined: Feb 2004
Posts: 631
Likes: 41
From: Tampa FL
Originally Posted by TheKomoman
Those are darned respectable numbers at the wheel and that's a gorgeous Vette you have. The "Butt Dyno" is the one that matters most anyway, so enjoy! 
Yeah you are right - and believe me, it does feel like night and day when I compare the power curve pre-tuning vs. post-tuning (thanks to Lars) but was hoping to translate that on paper - no big deal - paper is much less important!! Plus now I have something else to work towards!
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Nice car Mike.
With all that torque i can't help but expect some more hp. And with those good looking headers my guess would be its rpm limited on the intake side - air clnr, carb, intake. Can't see ur dyno curves but AC and intakes are fairly cheap to upgrade and carbs are fairly easy to swap while not too expensive.
Anyways at least u know u have plenty torque and more hp potential to experiment with.
Any C3 owner would be very happy to make that kind of power.
cardo0
Anyways at least u know u have plenty torque and more hp potential to experiment with.
Any C3 owner would be very happy to make that kind of power.
cardo0
Melting Slicks
Joined: May 2003
Posts: 2,253
Likes: 1
From: Rochester Kent
Originally Posted by TheKomoman
Those are darned respectable numbers at the wheel and that's a gorgeous Vette you have. The "Butt Dyno" is the one that matters most anyway, so enjoy!
Nice numbers
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
You could easily pick up 20++ HP by changing the intake manifold and carb...
The street dominator isn't really a performance intake..
The q-Jet is nice, but there's nothing like a Holley
The street dominator isn't really a performance intake..
The q-Jet is nice, but there's nothing like a Holley
Thread Starter
Pro
Joined: Feb 2004
Posts: 631
Likes: 41
From: Tampa FL
You are all correct on the intake issue, however when I went with the Holley SD I did not want to go the L88 Hood route...I still dont - so I will live with what I have for now...
However, after reading this post from a fellow dyno-er yesterday, I like to think my true RWHP maybe closer to 275!
I wonder what a cam and heads would do while still keeping my stock BB Hood....at that point I could try the mighty demon or Holley Street HP (I cant fit a choke tower)
I was a bit disappointed that I don't have a trophy dyno chart to post on the site. My car was really pulling around 362rwhp and 366 rwtq at Abacus in Va Beach last April. though their SAE corrected numbers were 20 lower than that. I have it on good authority that Abacus's dyno reads 20 lower than others in Virginia Beach. So that's the background on my latest state of tune, backed up by higher mph on runs at Cecil County. And backed up by actual results of beating C6s and Z06s at the track this year when I couldn't do it before.
Yesterday at John's my max was 337.8 rwhp and 341.5 rwtq, down from 343.9 and 348.2 in April at John's. After a lengthy talk with John he said my uncorrected numbers were up 10 from my last run in April, yet the corrected numbers were down 10. So obviously the SAE correction for weather is way off.
What this means for the rest of you is your numbers might have been 10 - 15 rwhp better on a perfect weather day. So take yesterday's numbers with a grain of salt; all of our cars are a bit stronger than that.
We need to schedule another dyno day in the cold of winter like that time at Springfield. We can throw these dyno charts on a bonfire to keep warm.
However, after reading this post from a fellow dyno-er yesterday, I like to think my true RWHP maybe closer to 275!
I wonder what a cam and heads would do while still keeping my stock BB Hood....at that point I could try the mighty demon or Holley Street HP (I cant fit a choke tower)
I was a bit disappointed that I don't have a trophy dyno chart to post on the site. My car was really pulling around 362rwhp and 366 rwtq at Abacus in Va Beach last April. though their SAE corrected numbers were 20 lower than that. I have it on good authority that Abacus's dyno reads 20 lower than others in Virginia Beach. So that's the background on my latest state of tune, backed up by higher mph on runs at Cecil County. And backed up by actual results of beating C6s and Z06s at the track this year when I couldn't do it before.
Yesterday at John's my max was 337.8 rwhp and 341.5 rwtq, down from 343.9 and 348.2 in April at John's. After a lengthy talk with John he said my uncorrected numbers were up 10 from my last run in April, yet the corrected numbers were down 10. So obviously the SAE correction for weather is way off.
What this means for the rest of you is your numbers might have been 10 - 15 rwhp better on a perfect weather day. So take yesterday's numbers with a grain of salt; all of our cars are a bit stronger than that.
We need to schedule another dyno day in the cold of winter like that time at Springfield. We can throw these dyno charts on a bonfire to keep warm.
Last edited by mike229; Jul 17, 2005 at 07:04 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Drifting
Joined: Nov 2001
Posts: 1,469
Likes: 6
From: 68 427 4.11s Roadster
I know dynos correct for air and all that but if the engine can't make the power can the machine correct for it? A lotta temperature and a lotta water in the air.
Would you still make this same HP on a more reasonable day or would it be more?
Would you still make this same HP on a more reasonable day or would it be more?
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
Originally Posted by mike229
Thanks! Yeah you are right - and believe me, it does feel like night and day when I compare the power curve pre-tuning vs. post-tuning (thanks to Lars) but was hoping to translate that on paper - no big deal - paper is much less important!! Plus now I have something else to work towards!
Yeah you are right - and believe me, it does feel like night and day when I compare the power curve pre-tuning vs. post-tuning (thanks to Lars) but was hoping to translate that on paper - no big deal - paper is much less important!! Plus now I have something else to work towards!Darn! Forgot to add the most important part...
GO IGGLES!!!!
