Dyno'd the TA today, expected more HP
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Dyno'd the TA today, expected more HP I dyno'd my TA today, it was running rich as hell so i had them retune it. First run was a 379rwhp, needless to say, with the mods in my sig. i was pissed. They leaned it out and i got a 385 on the 2nd run, leaned it out a little more and got 391 for the 3rd run. I expected this car to dyno over 400 to the wheels easy so i was a little unhappy with the results, but 391 sounds alot better than the 379 i had with it running rich(11.9 WOT). The guys at Speedtek said all 98's seem to dyno lower than 99+ LS1's, they think it has something to do with the computer cause thats the only difference between the LS1's they've dyno'd. They dyno'd 98 and 99+ LS1's with the same mods and the 98 always seems to dyno less than expected. I didn't even know the 99+ had a dif computer till today. Any of you guys with 98's have similar lower than expected results at the dyno? BTW, my final numbers were 391rwhp/374tq
The year model you have makes little difference in potential hp once you go heads/cam. The fact that you're running a forged motor with Patriot heads and nice size cam and are unable to break 400 rwhp is puzzling. Was this on a Dynojet or Mustang dyno?
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
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2023 Corvette 3LT Z51 soon to be modified.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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i Forgot to add in my sig, i do have a LS6 intake, and it was a dynojet. But this motor does need a smooth bellows and the dyno run was with catted y-pipe. I'm thinking about replacing the cats with some flo-pro twisted mufflers and see how much that helps.
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Originally Posted by Patrick G
The year model you have makes little difference in potential hp once you go heads/cam. The fact that you're running a forged motor with Patriot heads and nice size cam and are unable to break 400 rwhp is puzzling. Was this on a Dynojet or Mustang dyno?
Originally Posted by White95TA
i Forgot to add in my sig, i do have a LS6 intake, and it was a dynojet. But this motor does need a smooth bellows and the dyno run was with catted y-pipe. I'm thinking about replacing the cats with some flo-pro twisted mufflers and see how much that helps.
You appear to be down on power. Do you have confidence that your tune is as good as it can get?
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Originally Posted by Patrick G
For what it's worth, I only lose about 2-3 rwhp with cats. Don't know if you'll like the sound or smell of an off road y-pipe. The smooth bellows is a cosmetic mod as it has been show to make 0-1 rwhp.
You appear to be down on power. Do you have confidence that your tune is as good as it can get?
You appear to be down on power. Do you have confidence that your tune is as good as it can get?
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From: Charleston, SC
Originally Posted by Patrick G
For what it's worth, I only lose about 2-3 rwhp with cats.
Originally Posted by 8GTOKLR
What plugs are in it? and you have a 160stat?
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Originally Posted by 8GTOKLR
the tr6 might help get you some more timing..
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From: Plano, Tx.
Originally Posted by White95TA
I thought the year made no difference too but the guys at speedtek swear that every 98 they've seen has put down less HP than expected and 99+ LS1's with the same mods put down like 20 more HP than the 98's.
98's can make as much power as the other years with the right mods.
I have a 98 and I'm making 389rwhp with a Hotcam and stock heads (never taken off), and I should hit some much higher numbers when I put in a real cam!
Here's a dyno graph.
http://www.cobraeater.cz28.com/image...r%20Hotcam.jpg
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Originally Posted by Patrick G
For what it's worth, I only lose about 2-3 rwhp with cats. Don't know if you'll like the sound or smell of an off road y-pipe. The smooth bellows is a cosmetic mod as it has been show to make 0-1 rwhp.
You appear to be down on power. Do you have confidence that your tune is as good as it can get?
You appear to be down on power. Do you have confidence that your tune is as good as it can get?
Try the sound of some true duals without cats!
He doesnt have anything left from a 98 motor so they can base the lack of HP from that..forged pistons, crank which is probably drilled and chanfered for oiling, he has long tubes, patriot heads, 10.8cr over the 10.2, a much bigger cam 224r,.. hey White what are your valve train specs...model spring,rods,lifters etc...
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Originally Posted by 8GTOKLR
He doesnt have anything left from a 98 motor so they can base the lack of HP from that..forged pistons, crank which is probably drilled and chanfered for oiling, he has long tubes, patriot heads, 10.8cr over the 10.2, a much bigger cam 224r,.. hey White what are your valve train specs...model spring,rods,lifters etc...
Our setups are nearly identical save for the bottom end. Your numbers do seem a little low and I would start looking into things especially if someone else did the install of your mods. The Carsound/Magnaflow cats don't flow as well as the RT MM cats and I lost 9rwhp and about equal torque on my TR224 cam only setup two years ago.
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Originally Posted by Ryan02SS
Our setups are nearly identical save for the bottom end. Your numbers do seem a little low and I would start looking into things especially if someone else did the install of your mods. The Carsound/Magnaflow cats don't flow as well as the RT MM cats and I lost 9rwhp and about equal torque on my TR224 cam only setup two years ago.
Originally Posted by White95TA
That's the problem, i bought this TA already modded and the previous owner is having trouble finding some of the paperwork so i dont know all the specs on some things. The springs are not stock their patriot Gold something, i forget, the lifters are comp oem replacements, not comp-r and the pushrods are stock.
maybe its the pushrods . the cam is a high lift cam, you got high lift springs and oe comp lifters, i dont think the stock pushrod is keeping up with highlift cam and springs. they are the middleman in the system.
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Originally Posted by 8GTOKLR
maybe its the pushrods . the cam is a high lift cam, you got high lift springs and oe comp lifters, i dont think the stock pushrod is keeping up with highlift cam and springs. they are the middleman in the system.