Poll: Who has ever hit the rev limiter? - Page 6 - ZR-1 Net Registry Forums

WB9MCW · 02-13-2007

HADI HAS THE RED LIGHT ON AT HIZ HOUSE THOUGH!

TILL ROCKSANNE MOVED IN AND TURNED IT OFF!!! LOL

jonszr1 · 02-17-2007

AW i guess poor hopalong is going to be getting the gas for a while. But he seems to be a good sport. Also was nice enough to give us a great sounding video. how do you speed shift with that cast . horefully no holes in the fire wall

DDSLT5 · 02-19-2007

This thread has been very interesting.

The stock rev limiter is set to 7072 rpm. It is set there to preserve the life of the water pump, alternator and steering pump. The engine's redline is 8000 rpm. Above that rpm you risk valve float, although a few members have run their motors above 8000 rpms without issue.

Will it hurt to hit the rev limiter? No. Will it hurt to hit the rev limiter many times? No. Will it damage the engine to run it on the limiter all day? Well - that can't be good for the cam chains or the cams themselves, but the rest of the engine won't give a damn.

Moral of the story - don't worry about touching the rev limiter from time to time. Mine is set to 7400 rpm with a 4.125 inch stroke, which is the same piston speed as running a stock motor above 8000 rpm. I also have larger pulleys on the water pump and alternator to slow them down, use less power and extend their life as I wring it up to 7400 rpm on a regular basis.

As for shift lights - set them 200 rpm below where you have the limiter - shift just after you see the light, and you'll never hit the limiter.

The stock shift light is too difficult to see to be useful. It was calibrated for peak power on the stock calibration when at WOT, and for fuel economy at part throttle. It was pretty cool.

WB9MCW · 02-19-2007

good info---nice to see ya postin here doc---hope u are happy in yankee land now---

cward · 02-25-2007

Quote:

Originally Posted by DDSLT5

This thread has been very interesting.

The stock rev limiter is set to 7072 rpm. It is set there to preserve the life of the water pump, alternator and steering pump. The engine's redline is 8000 rpm. Above that rpm you risk valve float, although a few members have run their motors above 8000 rpms without issue.

Will it hurt to hit the rev limiter? No. Will it hurt to hit the rev limiter many times? No. Will it damage the engine to run it on the limiter all day? Well - that can't be good for the cam chains or the cams themselves, but the rest of the engine won't give a damn.

Moral of the story - don't worry about touching the rev limiter from time to time. Mine is set to 7400 rpm with a 4.125 inch stroke, which is the same piston speed as running a stock motor above 8000 rpm. I also have larger pulleys on the water pump and alternator to slow them down, use less power and extend their life as I wring it up to 7400 rpm on a regular basis.

As for shift lights - set them 200 rpm below where you have the limiter - shift just after you see the light, and you'll never hit the limiter.

The stock shift light is too difficult to see to be useful. It was calibrated for peak power on the stock calibration when at WOT, and for fuel economy at part throttle. It was pretty cool.

I have been following this thread with a large smile. :-) My rev limiter was set to either 7600 or 7800, I can't remember which. I have banged off of it so many times, I couldn't even begin to guess how many times. I agree with what Dwight says. No damage. That is what it was designed to do. To stop you from damaging the engine. I will say also that I ran my Z very hard and it was used to the treatment I gave it. Even at 105K miles on the engine, it still ran pretty good. Would I recommend that for every LT5, probably not if you don't do it all the time. Do I think it will hurt it, probably not. My engine has done things that most will never see. I have had it 180 mph in 5th with 4.10 gears and held it there for several seconds (BBORR 2001 heading to finish line). I am not sure but seem to remember that it was at about 7400 - 7500 rpm at the finish line. And I had the "pedal to the metal (fiberglass)". With modified engines, going above 7000 makes sense when racing or playing. With a stock Z, there seems to be no good reason to rev much over 7000 as it runs out of air. My car was slightly modified and on the dyno was still producing good hp at 7400. Just thought I would comment. I am sure there are many Z owners who hate what I did to my Z. However, I feel like when racing in ORR, I was doing what the car was designed to do. It is a great ORR car. With just a few thousand dollars worth of mods, it was able to beat a lot of very expensive cars. And give its owner (me) memories to last a lifetime.

40th#381 · 02-25-2007

Curtis:

I always enjoyed it when I heard of something else No 364 had done or was about to do. Always was courious what would have happend next if 364 wasen't wrecked.

Jan

cward · 02-26-2007

Quote:

Originally Posted by 40th#381

Curtis:

I always enjoyed it when I heard of something else No 364 had done or was about to do. Always was courious what would have happend next if 364 wasen't wrecked.

Jan

Hi Jan,
There were two things that I wanted to do with #364: 200 mph and 10 sec 1/4 mile. I did one and will always believe that I would have done the other on Sat. at BG when #364 was wrecked. Now had I accomplished both goals, I probably would have raised the bar but will never know. 11.08@129 will just have to suffice.

Curtis

jonszr1 · 02-26-2007

wow that a great et and mph . what mods did you have to get there? what did you do to the suspension to get it to hook up? love to learn from ya. thanx

cward · 02-26-2007

Quote:

Originally Posted by jonszr1

wow that a great et and mph . what mods did you have to get there? what did you do to the suspension to get it to hook up? love to learn from ya. thanx

#364 had only a few mods, all bolt on. RWHP was 392. I had the normal stuff done: inj housings, plenuum, headers and 3 1/2 inch SS open exhaust with X pipe. For most of the time I ran 4.10 gears except when ORR then 3.45. For drag racing, I sprayed a little. Best 60' was 1.59. I used 10" ET Streets when spraying and they hooked pretty good. I set front shocks to full soft and rears to 3/4 hard. My FX3 system was disconnected and I set all shocks by hand. Fronts are easy. Rears more fun.

A26B · 03-31-2007

It's north of 7500, I know that!

View Poll Results: Have you ever hit the rev limiter?
YES	147	67.12%
NO	72	32.88%
Voters: 219. You may not vote on this poll

02-13-2007	#51
WB9MCW Join Date: Dec 2003 Location: McHenry, Il. Posts: 6,607	Re: Poll: Who has ever hit the rev limiter? HADI HAS THE RED LIGHT ON AT HIZ HOUSE THOUGH! TILL ROCKSANNE MOVED IN AND TURNED IT OFF!!! LOL __________________ http://i119.photobucket.com/albums/o...9mcw/SIG-2.jpg http://i119.photobucket.com/albums/o128/wb9mcw/vcm.gif "The Budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed, lest Rome will become bankrupt. People must again learn to work instead of living on public assistance." - Cicero, 55 BC " We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution." - Abraham Lincoln Last edited by WB9MCW; 02-13-2007 at 09:58 PM.

02-17-2007	#52
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Poll: Who has ever hit the rev limiter? AW i guess poor hopalong is going to be getting the gas for a while. But he seems to be a good sport. Also was nice enough to give us a great sounding video. how do you speed shift with that cast . horefully no holes in the fire wall

02-19-2007	#53
DDSLT5 Join Date: Aug 2005 Posts: 114	Re: Poll: Who has ever hit the rev limiter? This thread has been very interesting. The stock rev limiter is set to 7072 rpm. It is set there to preserve the life of the water pump, alternator and steering pump. The engine's redline is 8000 rpm. Above that rpm you risk valve float, although a few members have run their motors above 8000 rpms without issue. Will it hurt to hit the rev limiter? No. Will it hurt to hit the rev limiter many times? No. Will it damage the engine to run it on the limiter all day? Well - that can't be good for the cam chains or the cams themselves, but the rest of the engine won't give a damn. Moral of the story - don't worry about touching the rev limiter from time to time. Mine is set to 7400 rpm with a 4.125 inch stroke, which is the same piston speed as running a stock motor above 8000 rpm. I also have larger pulleys on the water pump and alternator to slow them down, use less power and extend their life as I wring it up to 7400 rpm on a regular basis. As for shift lights - set them 200 rpm below where you have the limiter - shift just after you see the light, and you'll never hit the limiter. The stock shift light is too difficult to see to be useful. It was calibrated for peak power on the stock calibration when at WOT, and for fuel economy at part throttle. It was pretty cool.

02-19-2007	#54
WB9MCW Join Date: Dec 2003 Location: McHenry, Il. Posts: 6,607	Re: Poll: Who has ever hit the rev limiter? good info---nice to see ya postin here doc---hope u are happy in yankee land now--- __________________ http://i119.photobucket.com/albums/o...9mcw/SIG-2.jpg http://i119.photobucket.com/albums/o128/wb9mcw/vcm.gif "The Budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed, lest Rome will become bankrupt. People must again learn to work instead of living on public assistance." - Cicero, 55 BC " We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution." - Abraham Lincoln

02-25-2007	#56
40th#381 Join Date: Jul 2005 Location: Ft.Myers Posts: 62	Re: Poll: Who has ever hit the rev limiter? Curtis: I always enjoyed it when I heard of something else No 364 had done or was about to do. Always was courious what would have happend next if 364 wasen't wrecked. Jan

02-26-2007	#58
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Poll: Who has ever hit the rev limiter? wow that a great et and mph . what mods did you have to get there? what did you do to the suspension to get it to hook up? love to learn from ya. thanx

03-31-2007	#60
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,373	Re: Poll: Who has ever hit the rev limiter? It's north of 7500, I know that! __________________ 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.