430-435 CHP now.....What can I do to get 500-510 CHP? - ZR-1 Net Registry Forums

Vette73 · 05-08-2016

Right now I'm 382 hp to the rear at 7,000 RPM...

Headers, exhaust , Chip,ported plenum , air horn and I/Hs ..
What can I do to bring this 91 to the 500-510 CHP?

I'm located in NY....Sent Pete an email this morning asking for his advice
since he did my porting..I know port matching the heads will give me more power, yet I don't do that type of work....

Any idea of the cost this might be to accomplish 500-510 horsepower at the crank ? I know Marc has a 510 package but my car is already modded with what I described above...

I was thinking of going to Vette Drs and picking there brain...
I heard stories that were good and bad about the place...

As far as labor, would it be easier to do head work by taking the entire motor out to get to the heads or,just breaking down the motor while its in the car?

George Maz · 05-08-2016

http://www.zr1.net/forum/showthread.php?t=26300
Hib has a 93-95 chip for sale. I'm not sure if it would work for a 91 without head porting. I'm surprised a California owner hasn't already purchased it considering the adjustment made to help pass emissions.
Otherwise, take a ride to Stafford VA and Dyno-tune at the new shop. You can always have Marc burn a chip with the modification info you send him.

G8nightman · 05-08-2016

Get a light weight fly wheel it should help you on your hp quest.

We Gone · 05-08-2016

I have Marc's 510 with stock FW and cats right at 495HP, I would say get your heads done.

Hib Halverson · 05-08-2016

To get 500 SAE at the flywheel w. stock manifolds and cats you need:

Ported heads
Ported housings
Fully or partually ported plenum
Cams reset
Bigger injectors
Low restruction air filter assembly
Exhaust manifolds deburred internally with port entries blended.
Stock cats with cat entries deburred and blended.
Low restriction exhaust system w. 2.75" or 3.0" pipe
Aluminum flywheel
93-94.5 octane fuel
Proper calibration

With the above set-up, my engine made 416 SAE at the wheels on a DynoJet and, using the .82 correction for C4 manuals, 507 SAE at the flywheel. The exact power output depends on the dyno and a host of other issues unrelated to the engine itself. Many other engines with similar packages of mods have made 495-505-hp SAE at the flywheel.

If headers are legal in your state, given proper cal and exhaust system, their addition will get you to 510-520 SAE at the flywheel.

FU · 05-08-2016

The Vette Dr's really don't work on LT5's now.

Vette73 · 05-08-2016

Quote:

Originally Posted by FU

The Vette Dr's really don't work on LT5's now.

Nobody does.....Maybe I will drive it out to Petes garage and take Amtrak home...Lol.......Its free for me....

G8nightman · 05-09-2016

I agree MODS are moneys lost but always a plus for the next guy.

secondchance · 05-10-2016

Quote:

Originally Posted by G8nightman

I agree MODS are moneys lost but always a plus for the next guy.

As for me, there won't be the next guy.

cuisinartvette · 05-10-2016

Headwork larger stroke etc youll dig it
Portmatching the heads not worth it $$

05-08-2016	#1
Vette73 Join Date: Nov 2014 Location: Brooklyn ny Posts: 1,045	430-435 CHP now.....What can I do to get 500-510 CHP? Right now I'm 382 hp to the rear at 7,000 RPM... Headers, exhaust , Chip,ported plenum , air horn and I/Hs .. What can I do to bring this 91 to the 500-510 CHP? I'm located in NY....Sent Pete an email this morning asking for his advice since he did my porting..I know port matching the heads will give me more power, yet I don't do that type of work.... Any idea of the cost this might be to accomplish 500-510 horsepower at the crank ? I know Marc has a 510 package but my car is already modded with what I described above... I was thinking of going to Vette Drs and picking there brain... I heard stories that were good and bad about the place... As far as labor, would it be easier to do head work by taking the entire motor out to get to the heads or,just breaking down the motor while its in the car?

05-08-2016	#2
George Maz Join Date: Dec 2014 Location: Long Island, NY Posts: 295	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? http://www.zr1.net/forum/showthread.php?t=26300 Hib has a 93-95 chip for sale. I'm not sure if it would work for a 91 without head porting. I'm surprised a California owner hasn't already purchased it considering the adjustment made to help pass emissions. Otherwise, take a ride to Stafford VA and Dyno-tune at the new shop. You can always have Marc burn a chip with the modification info you send him. __________________ 1990 ZR-1 #1587 1990 ZR-1 #1727

05-08-2016	#3
G8nightman Join Date: Dec 2007 Location: NYC Posts: 1,191	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? Get a light weight fly wheel it should help you on your hp quest. __________________ 90 Chevy ZR1 LPE #2315 'SOLD' 90 Chevy ZR1 LPE #2774 'SOLD' 91 Chevy ZR1 Callaway aerobody 91 Chevy ZR1 #1512 91 Chevy ZR1 #951 95 Chevy ZR1 #338 'SOLD' 91 BMW 850i 94 BMW 850csi 95 BMW 850csi 94 Lotus Esprit S4 07 Benz CLS550 06 BMW M5 "SOLD"

05-08-2016	#4
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? I have Marc's 510 with stock FW and cats right at 495HP, I would say get your heads done. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

05-08-2016	#5
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? To get 500 SAE at the flywheel w. stock manifolds and cats you need: Ported heads Ported housings Fully or partually ported plenum Cams reset Bigger injectors Low restruction air filter assembly Exhaust manifolds deburred internally with port entries blended. Stock cats with cat entries deburred and blended. Low restriction exhaust system w. 2.75" or 3.0" pipe Aluminum flywheel 93-94.5 octane fuel Proper calibration With the above set-up, my engine made 416 SAE at the wheels on a DynoJet and, using the .82 correction for C4 manuals, 507 SAE at the flywheel. The exact power output depends on the dyno and a host of other issues unrelated to the engine itself. Many other engines with similar packages of mods have made 495-505-hp SAE at the flywheel. If headers are legal in your state, given proper cal and exhaust system, their addition will get you to 510-520 SAE at the flywheel. Last edited by Hib Halverson; 05-08-2016 at 02:44 PM. Reason: added content

05-08-2016	#6
FU Join Date: Mar 2004 Location: Found Member Posts: 4,346	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? The Vette Dr's really don't work on LT5's now. __________________ Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237

05-09-2016	#8
G8nightman Join Date: Dec 2007 Location: NYC Posts: 1,191	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? I agree MODS are moneys lost but always a plus for the next guy. __________________ 90 Chevy ZR1 LPE #2315 'SOLD' 90 Chevy ZR1 LPE #2774 'SOLD' 91 Chevy ZR1 Callaway aerobody 91 Chevy ZR1 #1512 91 Chevy ZR1 #951 95 Chevy ZR1 #338 'SOLD' 91 BMW 850i 94 BMW 850csi 95 BMW 850csi 94 Lotus Esprit S4 07 Benz CLS550 06 BMW M5 "SOLD"

05-10-2016	#10
cuisinartvette Join Date: Aug 2005 Location: San Fernando Valley, CA. Posts: 896	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? Headwork larger stroke etc youll dig it Portmatching the heads not worth it $$ __________________ 1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj.