Corey does his magic - Page 2 - ZR-1 Net Registry Forums

A26B · 01-14-2016

It's all subjective unless the engine is tested on an engine dyno instead of a chassis dyno. It's really not that big of a deal.

grahambehan · 01-14-2016

Quote:

Originally Posted by Paul Workman

Yeah, it shows ta go ya just how stifled these motors are. The second gen LT5 made 550 hp on the engine dyno, according to Graham Behan.

Oh...the lost opportunities and possibilities....

That would be 528 Hp 431 Tq.

Graham.

32valvesftw · 01-14-2016

First off I do not have a baseline number before the tune, I do not know much about the history of the car regarding if it had any mods. The peak power came on at about 5600, so according to Corey the plenum is probably not ported. That said I think there are always deviations in HP depending on who builds the motor. My understanding is that the LT5 is essentially a hand built motor, so there will be variation from motor to motor. In any case I agree its not a real big deal, I was just pleasantly surprised. Cant wait to drive it!

RussMcB · 01-14-2016

Quote:

Originally Posted by Billy Mild

Comparison to the Haibeck tunes?

It's hard to imagine one of those guys having a way better tune than the other.

Vette73 · 01-14-2016

Quote:

Originally Posted by 32valvesftw

First off I do not have a baseline number before the tune, I do not know much about the history of the car regarding if it had any mods. The peak power came on at about 5600, so according to Corey the plenum is probably not ported. That said I think there are always deviations in HP depending on who builds the motor. My understanding is that the LT5 is essentially a hand built motor, so there will be variation from motor to motor. In any case I agree its not a real big deal, I was just pleasantly surprised. Cant wait to drive it!

Yes from what I understand they were all hand built...My theory is if there all the same displacement same cams same valves same spark plugs,I would tend to believe they would basically perform the same....I'm sure after they were assembled they had to be checked for proper compression and just basic assembly...

Let us know how you like it when you drive it..Safe driving...

32valvesftw · 01-14-2016

It was also usually chilly when she was on the dyno. So there is that.

XfireZ51 · 01-14-2016

A tune AND headers isn't additive. The headers are going to add hp by reducing restriction in the exhaust. A "tune" will take advantage of the modification, it won't "add" horsepower beyond what the exhaust modification makes possible.
As Jerry stated, this is subjective given the fact that Dino's, even of the same make, can have significantly different results. Dyno results are valuable from the standpoint of establishing a benchmark, and then tracking changes and the results of those changes.

1990 quasar blue · 01-14-2016

Could be the correction factor. Maybe STD as opposed to SAE. Regardless, congrats on the new power.
Porting the plenum and injector housings will compliment those headers nicely.

XfireZ51 · 01-14-2016

Quote:

Originally Posted by 1990 quasar blue

Could be the correction factor. Maybe STD as opposed to SAE. Regardless, congrats on the new power.
Porting the plenum and injector housings will compliment those headers nicely.

Frankly, that should be stated. For the most part, people that post dyno results use SAE. I know I do, and pretty sure Marc does. A dyno chart would be nice to see to determine the basis used for measurement.
Having said that, the upgrade in power is like scuba diving "rapture of the deep".
The further you travel down, the further you want to travel down. Power is intoxicating and the LT-5, at 500hp+ levels really is a blast. ENJOY!

Paul Workman · 01-15-2016

Quote:

Originally Posted by grahambehan

That would be 528 Hp 431 Tq.

Graham.

Thanks for that correction, Graham.

01-14-2016	#11
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,397	Re: Corey does his magic It's all subjective unless the engine is tested on an engine dyno instead of a chassis dyno. It's really not that big of a deal. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.

01-14-2016	#13
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 529	Re: Corey does his magic First off I do not have a baseline number before the tune, I do not know much about the history of the car regarding if it had any mods. The peak power came on at about 5600, so according to Corey the plenum is probably not ported. That said I think there are always deviations in HP depending on who builds the motor. My understanding is that the LT5 is essentially a hand built motor, so there will be variation from motor to motor. In any case I agree its not a real big deal, I was just pleasantly surprised. Cant wait to drive it!

01-14-2016	#16
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 529	Re: Corey does his magic It was also usually chilly when she was on the dyno. So there is that.

01-14-2016	#17
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: Corey does his magic A tune AND headers isn't additive. The headers are going to add hp by reducing restriction in the exhaust. A "tune" will take advantage of the modification, it won't "add" horsepower beyond what the exhaust modification makes possible. As Jerry stated, this is subjective given the fact that Dino's, even of the same make, can have significantly different results. Dyno results are valuable from the standpoint of establishing a benchmark, and then tracking changes and the results of those changes. Last edited by XfireZ51; 01-14-2016 at 08:44 PM.

01-14-2016	#18
1990 quasar blue Join Date: Feb 2004 Location: Ma Posts: 403	Re: Corey does his magic Could be the correction factor. Maybe STD as opposed to SAE. Regardless, congrats on the new power. Porting the plenum and injector housings will compliment those headers nicely.