LG Header Question
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,102
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
So maybe the question needs to be better defined.
Are there any dyno charts showing the differences between the 1.75" street series and the 1.75 pros that were done on ~440-450 HP mild cammed LS2 cars and again on full bolton LS3 cars?
That seems in line with a power level that is attainable while retaining good driveability and a stopping point for many people.
Guys like Shawn and myself who actually do want the real HP gains that will show up on a timeslip, can generally read between the lines on a dyno sheet and see what the benefit may be.
The guys who will never hit the track are far more impressed with the tone and decibel level that they equate to power and make their purchase decisions based on the track results of others.
Are there any dyno charts showing the differences between the 1.75" street series and the 1.75 pros that were done on ~440-450 HP mild cammed LS2 cars and again on full bolton LS3 cars?
That seems in line with a power level that is attainable while retaining good driveability and a stopping point for many people.
Guys like Shawn and myself who actually do want the real HP gains that will show up on a timeslip, can generally read between the lines on a dyno sheet and see what the benefit may be.
The guys who will never hit the track are far more impressed with the tone and decibel level that they equate to power and make their purchase decisions based on the track results of others.
Team Owner
Joined: Nov 2006
Posts: 21,136
Likes: 212
From: Long Island New York
LS2 or LS3 car?
From testing here, even on larger cam'd cars going to the 1 7/8" on one of those cars would cost it 10-15 ft-lbs of torque then the lines will match up around 3500-3700 RPM and follow close to each other and the 1 7/8" would start to pick up a slight bit of HP above 5500 RPM but we are not talking much more than 2-4 hp at that point on a car making 470 rwhp on a LS3 car.
I'll see today if I can find the graphs of it. I didn't do them on the same day but it was the same car we did it on, and roughly 5-6 pulls between the two sets.
From testing here, even on larger cam'd cars going to the 1 7/8" on one of those cars would cost it 10-15 ft-lbs of torque then the lines will match up around 3500-3700 RPM and follow close to each other and the 1 7/8" would start to pick up a slight bit of HP above 5500 RPM but we are not talking much more than 2-4 hp at that point on a car making 470 rwhp on a LS3 car.
I'll see today if I can find the graphs of it. I didn't do them on the same day but it was the same car we did it on, and roughly 5-6 pulls between the two sets.
Thats why I initially went with the 3/4's. I didnt want to give up that sweet low/midrage TQ. My cars primarily a street car and the top end loss weighed against TQ, I'll take the TQ. The car still pulls like a babshee over 5K. Seems like I made the right decision.
Either way, both sizes are a win/win in my book. If you can find the dynos great, if not, no big deal. thanks.
Last edited by NYC6; Sep 15, 2011 at 12:25 PM.
Race Director
Joined: May 2003
Posts: 10,748
Likes: 41
No it isn't....different question..
Here is your graph.....
Car tested 2006 LS2 Corvette
M6 Z51
Stock air box, stock mufflers.
LG Street Series no cat vs LG SuperPro no cat
No changes to the tune between, but these are tuned numbers.
As I said, results are going to vary. On this test it was almost 4hp difference between the two. Notice torque change as well.
Here is your graph.....
Car tested 2006 LS2 Corvette
M6 Z51
Stock air box, stock mufflers.
LG Street Series no cat vs LG SuperPro no cat
No changes to the tune between, but these are tuned numbers.
As I said, results are going to vary. On this test it was almost 4hp difference between the two. Notice torque change as well.
Last edited by 88BlackZ-51; Jul 16, 2013 at 07:09 PM.
