90-92 Mod test - ZR-1 Net Registry Forums

LGAFF · 06-12-2009

This weekend I hope to do a few dyno runs...if the clutch slave holds up. I am going to see if they will let me run the stock chip on the first run and then switch to the DRM chip.....we will see what the difference is, and get a basline.

90 ZR1 136K miles

Current mods:
Corsa cat back, DRM Chip.

-I think the next mod would be the Ported intake
-Then headers.

VetteMed · 06-13-2009

Eagerly awaiting the results! Thanks for making the effort to do this!

Quote:

Originally Posted by LGAFF

This weekend I hope to do a few dyno runs...if the clutch slave holds up. I am going to see if they will let me run the stock chip on the first run and then switch to the DRM chip.....we will see what the difference is, and get a basline.

90 ZR1 136K miles

Current mods:
Corsa cat back, DRM Chip.

-I think the next mod would be the Ported intake
-Then headers.

Z Factor · 06-13-2009

Quote:

Originally Posted by LGAFF

This weekend I hope to do a few dyno runs...if the clutch slave holds up. I am going to see if they will let me run the stock chip on the first run and then switch to the DRM chip.....we will see what the difference is, and get a basline.

90 ZR1 136K miles

Current mods:
Corsa cat back, DRM Chip.

-I think the next mod would be the Ported intake
-Then headers.

The two planned mods will make a big difference.

LGAFF · 06-13-2009

I was thinking that doing the ported plenum would be the next step as it is the most affordable at $700-$1200. Headers are $1500 plus install.

LGAFF · 06-13-2009

LAst year during the Dyno test I did not get any rpm readings as they could not figure out where to read it....I assume this would be the proper place? Any input?

__________________

Ccmano · 06-13-2009

Lee, your right about the white tach wire. I spoke to Marc H about this very question last weekend. However he feels the orange wire comming out the back of the ingition unit under the plenum is a more reliable tach signal. If you look down the back of the plenum under the MAP sensor you can see it in the group of exposed wires there.
H

Paul Workman · 06-13-2009

I wonder if it depends on the dyno or the operator. Last year at Effingham they had a problem initially with my car, until I reminded them the Z has a waste-spark feature. "Oh!" Suddenly, problem solved.

P.

Tom N · 06-25-2009

Just wondering if you have been able to do the dyno comparison yet?

Tom N.
1991 Red/Red

LGAFF · 06-25-2009

Rough start, I went and put it on the dyno....something is not right....first 2 runs were 276 and then 303hp. I need to figure out whats going on....pretty well established that a stocker with Corsa is about 330-335. Both Hans and Dons car produced these numbers.

I have not abandoned this, just need to wrap up a few projects....cam emblems, and porting IHs. Sorry for the delay, I was diappointed when I shelled out the $80 and that car did not perform after running a 12.88 @ 112.68 a few weeks prior

XfireZ51 · 06-25-2009

Frankly I would trust the trap speed more than the dyno. At 112 mph, it sounds like it's making power at expected levels for a stocker.
The white wire for the tach signal needs a low voltage pickup which some dynos don't have.
Marc H has his own that he brings with.

06-12-2009	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	90-92 Mod test This weekend I hope to do a few dyno runs...if the clutch slave holds up. I am going to see if they will let me run the stock chip on the first run and then switch to the DRM chip.....we will see what the difference is, and get a basline. 90 ZR1 136K miles Current mods: Corsa cat back, DRM Chip. -I think the next mod would be the Ported intake -Then headers. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-13-2009	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 90-92 Mod test I was thinking that doing the ported plenum would be the next step as it is the most affordable at $700-$1200. Headers are $1500 plus install. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-13-2009	#5
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 90-92 Mod test LAst year during the Dyno test I did not get any rpm readings as they could not figure out where to read it....I assume this would be the proper place? Any input? __________________ __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-13-2009	#6
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: 90-92 Mod test Lee, your right about the white tach wire. I spoke to Marc H about this very question last weekend. However he feels the orange wire comming out the back of the ingition unit under the plenum is a more reliable tach signal. If you look down the back of the plenum under the MAP sensor you can see it in the group of exposed wires there. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

06-13-2009	#7
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: 90-92 Mod test I wonder if it depends on the dyno or the operator. Last year at Effingham they had a problem initially with my car, until I reminded them the Z has a waste-spark feature. "Oh!" Suddenly, problem solved. P. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

06-25-2009	#8
Tom N Join Date: Jun 2009 Location: Oak Ridge, Tenn. Posts: 1	Re: 90-92 Mod test Just wondering if you have been able to do the dyno comparison yet? Tom N. 1991 Red/Red

06-25-2009	#9
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 90-92 Mod test Rough start, I went and put it on the dyno....something is not right....first 2 runs were 276 and then 303hp. I need to figure out whats going on....pretty well established that a stocker with Corsa is about 330-335. Both Hans and Dons car produced these numbers. I have not abandoned this, just need to wrap up a few projects....cam emblems, and porting IHs. Sorry for the delay, I was diappointed when I shelled out the $80 and that car did not perform after running a 12.88 @ 112.68 a few weeks prior __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-25-2009 at 08:58 PM.

06-25-2009	#10
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,696	Re: 90-92 Mod test Frankly I would trust the trap speed more than the dyno. At 112 mph, it sounds like it's making power at expected levels for a stocker. The white wire for the tach signal needs a low voltage pickup which some dynos don't have. Marc H has his own that he brings with.