Low Numbers?
Low Numbers? Car is a 2000 Camaro SS with a rebuilt 4160e.
Car has Pacesetters into 2 no name brand high flow cats, 2.5 inch duals out the back with slp loudmouth resonators. Stock ls1 intake, 232/234 .59x .59x camshaft with ported ls6 oil pump, all new wires, ss3600 yank stall, all new fluids working 02 sensors. Here is a picture of the dyno, i think its rather low and to add insult i got blown away by a stock 03 cobra the other night, like he pulled bus lengths. I know my injectors are at 112% cycle at 5800 rpms but would that cause a sad 334 rwtq with such a healthy cam?
All done on a mustang dyno in perfect weather, probably 70 degrees here in DE
Car has Pacesetters into 2 no name brand high flow cats, 2.5 inch duals out the back with slp loudmouth resonators. Stock ls1 intake, 232/234 .59x .59x camshaft with ported ls6 oil pump, all new wires, ss3600 yank stall, all new fluids working 02 sensors. Here is a picture of the dyno, i think its rather low and to add insult i got blown away by a stock 03 cobra the other night, like he pulled bus lengths. I know my injectors are at 112% cycle at 5800 rpms but would that cause a sad 334 rwtq with such a healthy cam?
All done on a mustang dyno in perfect weather, probably 70 degrees here in DE
As most numbers reported are from DynoJets and Mustang dyno's load things differently, your numbers will be approx 10% lower than what would be reported on a DynoJet. A duty cycle that high points to fuel issues first, but the LS1 manifold is also choking you down
On The Tree
Joined: Dec 2001
Posts: 176
Likes: 0
From: Bethel, CT
My A4 pulled 344/368 on a Dynojet with a 228R cam,LTs and converter.
PRC 5.3 heads got it to 383/387. Traction in 1st is non-existant with GRCs.
I wouldn't worry about it. A4s with converters don't dyno worth a damn.
A.You're running too rich. Lean it down to 12.9
B. LS6 intake is good for 5 h.p. Big deal.
PRC 5.3 heads got it to 383/387. Traction in 1st is non-existant with GRCs.
I wouldn't worry about it. A4s with converters don't dyno worth a damn.
A.You're running too rich. Lean it down to 12.9
B. LS6 intake is good for 5 h.p. Big deal.
Last edited by PonchoFan; May 14, 2008 at 10:55 AM.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
i beat a lightly modded 04 cobra from a 10 mph roll...mods were all bolt ons vhp220/224 cam tci 4000 stall and 373 gears....I had a 250lb passenger and the cap was on my cutout"i have a very restrictive catback"
the cobra had a cai heat exchanger gutted cats and free mods...it was makin around 380rwhp....
has the car been tuned? somthin is wrong...
the cobra had a cai heat exchanger gutted cats and free mods...it was makin around 380rwhp....
has the car been tuned? somthin is wrong...
Its a 112 lsa, yeah the race was from a dig and he absolutley slaughtered me, like 4 or 5 lengths by 50 mph. Im waiting on the track until i can afford a new rear.
Join the club dude. I put down 345/335 on a Superflo dyno this past weekend with an M6. My car does not feel much faster than it was before the cam. Maybe we have shitty 00 motors, haha. I am looking into some things with mine but right now I am stumped. Hope you get it figured out.
Who did your tuning? I dont think your injectors should be maxed out. In my 01 Z06 on entirely stock fuel system injectors pump and all, stock intake, stock TB i put down 465rwhp/422rwtq on a mustang dyno. Where did you go evolution? or exotic? I always get the two mixed up. Ones a dynojet the other is a mustang dyno.
I say it's a poor tune. Do a compresion test see whats going on. You shouldnt have lost to a stock 03 cobra. Have you taken it to the track yet? run it up to Cecil Friday it's only $10 as long as it doesnt rain.
I say it's a poor tune. Do a compresion test see whats going on. You shouldnt have lost to a stock 03 cobra. Have you taken it to the track yet? run it up to Cecil Friday it's only $10 as long as it doesnt rain.
Who did your tuning? I dont think your injectors should be maxed out. In my 01 Z06 on entirely stock fuel system injectors pump and all, stock intake, stock TB i put down 465rwhp/422rwtq on a mustang dyno. Where did you go evolution? or exotic? I always get the two mixed up. Ones a dynojet the other is a mustang dyno.
I say it's a poor tune. Do a compresion test see whats going on. You shouldnt have lost to a stock 03 cobra. Have you taken it to the track yet? run it up to Cecil Friday it's only $10 as long as it doesnt rain.
I say it's a poor tune. Do a compresion test see whats going on. You shouldnt have lost to a stock 03 cobra. Have you taken it to the track yet? run it up to Cecil Friday it's only $10 as long as it doesnt rain.
Somethings going on with your **** if this is correct. 112% duty cycle??? WTF
I have a similiar 230/234 cam and am at 417/383 (with cats). My 5.3's and 90/90 account for some difference but not all. I don't have any track times yet but this should put me in the 11's and a stock Cobra is 12.5 at best IIRC. If I am wrong I will be corrected but you should easily compete with and most times beat a stock Cobra
Are you off a tooth??? Track numbers will tell the true tale. That Cobra could have been running more boost than letting on too. Good luck!!! I know how it is to worry and agonize over this stuff
I have a similiar 230/234 cam and am at 417/383 (with cats). My 5.3's and 90/90 account for some difference but not all. I don't have any track times yet but this should put me in the 11's and a stock Cobra is 12.5 at best IIRC. If I am wrong I will be corrected but you should easily compete with and most times beat a stock Cobra Are you off a tooth??? Track numbers will tell the true tale. That Cobra could have been running more boost than letting on too. Good luck!!! I know how it is to worry and agonize over this stuff 
Fran built my Z06 actually. The first time i dynoed it made 409rwhp at exotic (dynojet)and i was pissed as hell! I broke a valve spring 3k later and had someone else replace them. Then i took it back to evolution to dyno (mustangdyno) and put down 465rwhp. The oinly differences were new valve springs, i put 30psi in my rear tires instead of 15, and had a new transmission put in. I'm sure Fran had a mail order tune sent to him and he just tried to tweak it.
Do a compression check on the engnie just to be sure.
Do a compression check on the engnie just to be sure.
TECH Addict
Joined: Jun 2005
Posts: 2,660
Likes: 14
From: England
Car is a 2000 Camaro SS with a rebuilt 4160e.
Car has Pacesetters into 2 no name brand high flow cats, 2.5 inch duals out the back with slp loudmouth resonators. Stock ls1 intake, 232/234 .59x .59x camshaft with ported ls6 oil pump, all new wires, ss3600 yank stall, all new fluids working 02 sensors. Here is a picture of the dyno, i think its rather low and to add insult i got blown away by a stock 03 cobra the other night, like he pulled bus lengths. I know my injectors are at 112% cycle at 5800 rpms but would that cause a sad 334 rwtq with such a healthy cam?
All done on a mustang dyno in perfect weather, probably 70 degrees here in DE
Car has Pacesetters into 2 no name brand high flow cats, 2.5 inch duals out the back with slp loudmouth resonators. Stock ls1 intake, 232/234 .59x .59x camshaft with ported ls6 oil pump, all new wires, ss3600 yank stall, all new fluids working 02 sensors. Here is a picture of the dyno, i think its rather low and to add insult i got blown away by a stock 03 cobra the other night, like he pulled bus lengths. I know my injectors are at 112% cycle at 5800 rpms but would that cause a sad 334 rwtq with such a healthy cam?
All done on a mustang dyno in perfect weather, probably 70 degrees here in DE
As others have said the LS1 intake is not helping. A Ls6 or one of the after market intakes with a ported TB will help.
Running the injectors like that probably isn't good either. Especially as I'd expect that cam to PEAK higher in the rpms.
As for the dyno. Well Mustang dyno's are eddy current or load bearing dyno's and will generally offer up lower, yet more realistic numbers than the inertia Dynojet dyno's.
Stalls can also affect output. Do you know what gear the dyno run was performed in? And was the converter locked?
Then there are other issues such as are the figures STD or SAE corrected? STD means they figures are what the engine is making under the current conditions (temp/humidity, etc.). SAE corrected would use algorithms to give a calculated figured for set atmospheric conditions (more comparable).
This then leads to possible errors in using correction factors and also the accuracy of the dyno itself (calibration).
As for the race?
Well are you 100% it was a stock Cobra? Also remembering that a stock Cobra is full capable of trapping 112mph in the 1320. Most stock auto LS1's are nearer 102-105mph. So even modded you may not be that quick in terms of terminal speed, although you're ET may be better.
Just an intake, catback and pulley change on a Terminator will make a huge difference. Yet for many they may still consider it stock.
Also for the racing, what rear gears do you have? And what speed/gear did you race from?
Even with the stall picking the wrong speed with an A4 means you are going to be out of your powerband for roll racing.
the guy said it was stock, it was an older man probably 40's with a wife, so i mean he could have been a liar, but it had a stock catback.
Where could i get a compression test done?
Where could i get a compression test done?
Anywhere, a compression. a Leakdown is harder to find a place that will do it. You can do both yourself. Any of the parts stores carry compression testers. Autozone carries a nice one for like $30. There may be nothing wrong with your engine mechanically it could just be your setup.