Disappointing numbers
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Disappointing numbers
Had this installed and dyno tuned by Norris on my '02 Z06:
G5X-3 112lsa
AFR205 heads milled with 921 springs
flycut pistons
LSX 90mm intake
NW 90mm TB
160 stat
Already had LG headers, Corsa Ti race exhaust and Vortex intake. Result was 450 hp/383 tq.
No reflection on Mike Norris, his reputation speaks for itself, but why the low numbers, especially the torque??? Any suggestions? Didn't do a baseline to compare unfortunately....
G5X-3 112lsa
AFR205 heads milled with 921 springs
flycut pistons
LSX 90mm intake
NW 90mm TB
160 stat
Already had LG headers, Corsa Ti race exhaust and Vortex intake. Result was 450 hp/383 tq.
No reflection on Mike Norris, his reputation speaks for itself, but why the low numbers, especially the torque??? Any suggestions? Didn't do a baseline to compare unfortunately....
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The torque does seem to be a bit low.. are you running cats? what compression are you running? How deep were the pistons cut ? what gaskets.. ? Gears ? I have a lot of experience with those combos and would like to help. 
Thread Starter
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by CHRIS NJ C5
The torque does seem to be a bit low.. are you running cats? what compression are you running? How deep were the pistons cut ? what gaskets.. ? Gears ? I have a lot of experience with those combos and would like to help.
Instructor
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From: Brooklyn Park MN
Yea your torque does seem low, because before I had the 402 LS2 put in my car, I basically had everything you did. However, I ran an X2 cam, Z06 TI exhaust, and High flow cats. I came out with 404 torque, and 433 RWHP. My ARF heads were also milled for higher compression and fly cutting was done.
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by John Shiels
Intake and TB to big possibly? Which intake manifold?
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From: Boca Raton FL
You know I'm no expert... but that hasn't stopped me before so here's my $0.02
Not all dyno tunes use the same standards... Norris uses the more conservative SAE. It's also friggin' 95F & 90% humidity this time of year in our neck of the woods!
I'm sure on another dyno using different standards you will get better numbers providing at least an additional 30-45hp. My prior #s were 373/372 which turned out to be more like high 330s or low 340s... after installing headers & pipes my SAE #s were 354/346 and after tuning 369/360.
...so turn that frown into a smile...
I promise I won't call you out if you claim 500HP...
Actually the real story is that your car is a POS and since I'm such a nice guy I'll do an even swap... well, on second thoughts perhaps you'll also need to throw in the trailer, CCW's and slicks since I've got the "racing stripes" paint treatment...
Not all dyno tunes use the same standards... Norris uses the more conservative SAE. It's also friggin' 95F & 90% humidity this time of year in our neck of the woods!
I'm sure on another dyno using different standards you will get better numbers providing at least an additional 30-45hp. My prior #s were 373/372 which turned out to be more like high 330s or low 340s... after installing headers & pipes my SAE #s were 354/346 and after tuning 369/360.
...so turn that frown into a smile...
I promise I won't call you out if you claim 500HP...
Actually the real story is that your car is a POS and since I'm such a nice guy I'll do an even swap... well, on second thoughts perhaps you'll also need to throw in the trailer, CCW's and slicks since I've got the "racing stripes" paint treatment...
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by johnsea06
Actually the real story is that your car is a POS and since I'm such a nice guy I'll do an even swap... well, on second thoughts perhaps you'll also need to throw in the trailer, CCW's and slicks since I've got the "racing stripes" paint treatment...
J/K, I know Mike's dyno's on the low side too, but 30-40 hp/tq difference?? It doesn't matter to me all that much, my car is the furthest thing from a "dyno queen". The proof is in the putting! We'll see if I can get under 2:30 at Sebring now, but maybe losing the "ballast" would've gotten me there anyway!
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I believe Mike's dyno is on the conserative side too. Your RWHP looks fine to me, but the tq does seem low by 20 or so from similar setups, but all engines are different.
Also, tuning in this temp will effect the overall numbers, but I personally WANT my tune done on a hot/humid day. Worst case the car will see! I want to DYNO on a cool/dry day for the BIG numbers.
I will be there (NLP) next Friday for my tune (see sig for mods) and I hope to be in the 410+ rwhp range and over 550 on the juice. We will see. Either way, Mike has always done a good job for me and my friends.
I wonder if your exhaust is doing something strange, seeing it is not a full LG system. That's the only "odd" thing you have compared to others.
Also, tuning in this temp will effect the overall numbers, but I personally WANT my tune done on a hot/humid day. Worst case the car will see! I want to DYNO on a cool/dry day for the BIG numbers.
I will be there (NLP) next Friday for my tune (see sig for mods) and I hope to be in the 410+ rwhp range and over 550 on the juice. We will see. Either way, Mike has always done a good job for me and my friends.
I wonder if your exhaust is doing something strange, seeing it is not a full LG system. That's the only "odd" thing you have compared to others.
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From: Boca Raton FL
Originally Posted by dmtnt
Well, I can understand your need for a trailer Crash....
I guess I kind of set myself up for that one... I went down 4HP after installation of the headers from a prior run so maybe more like 15-25 hp more conservative instead of the 30-40 I mentioned... not scientific but probably in the ballpark...
And I really don't think the weight of the "ballast" was the issue, probably more like the DDDistraction... everyone was complaining about your inconsistent line around the track that day (j/k)... and look at what the DDDistraction did to Fast Mike... poor guy... his last lap took over 30min and had an EMT escort...
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by johnsea06
FOUL!!! LOW BLOW!!! I guess I kind of set myself up for that one...
And I really don't think the weight of the "ballast" was the issue, probably more like the DDDistraction... everyone was complaining about your inconsistent line around the track that day (j/k)... and look at what the DDDistraction did to Fast Mike... poor guy... his last lap took over 30min and had an EMT escort...
I guess I kind of set myself up for that one... And I really don't think the weight of the "ballast" was the issue, probably more like the DDDistraction... everyone was complaining about your inconsistent line around the track that day (j/k)... and look at what the DDDistraction did to Fast Mike... poor guy... his last lap took over 30min and had an EMT escort...
Maybe I'll stick her in the trunk with a stopwatch next time so I don't get DDDistracted!
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Originally Posted by new vetter
It's not the intake. It's good for at least 10 rwhp and 10 rwt over a LS6 combo.
Some like it and some don't the Vette Doctors told me they found no real gain in stock CI motors. LG said about 10 as you stated. What did you expect or what do similar combos turn out?
Last edited by John Shiels; Aug 19, 2005 at 01:56 PM.
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Originally Posted by John Shiels
Some like it and some don't the Vette Doctors told me they found no real gain in stock CI motors. LG said about 10 as you stated.
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Originally Posted by dmtnt
Well, I can understand your need for a trailer Crash....
J/K, I know Mike's dyno's on the low side too, but 30-40 hp/tq difference?? It doesn't matter to me all that much, my car is the furthest thing from a "dyno queen". The proof is in the putting! We'll see if I can get under 2:30 at Sebring now, but maybe losing the "ballast" would've gotten me there anyway!
J/K, I know Mike's dyno's on the low side too, but 30-40 hp/tq difference?? It doesn't matter to me all that much, my car is the furthest thing from a "dyno queen". The proof is in the putting! We'll see if I can get under 2:30 at Sebring now, but maybe losing the "ballast" would've gotten me there anyway!
yea, the numbers seem too much of a desparity even for DYNO differences. The thing is he's getting 450 hp! I would have expected a little more TQ, probably somewhere around 425-430. But then again, I know just as much as johnsea06 - well maybe a little more
Last edited by GR8-LIFE; Aug 19, 2005 at 02:31 PM.
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by MARK's_C5TT
The thing is he's getting 450 hp! I would have expected a little more TQ, probably somewhere around 425-430.
I wonder if it's my exhaust, but I can't see how. 3" reduced to 2.5" at the H pipe, then straight through wide open! Maybe it needs some backpressure to get the tq numbers up?