5,500 RPM should be safe for my LU5 right?
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Joined: Dec 2001
Posts: 9,937
Likes: 636
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
5,500 RPM should be safe for my LU5 right?
So, I had a Corvette governor installed in the 700R4 trans in my '83 Crossfire. It has cured the shifting problems I had from the mystery rebuild the previous owner had done.
As advertized, this governor's WOT 1-2 shift is at 5,500 RPM. My concern is that the indicated redline on the LU5 is 5,000 RPM. But the redline on my '89 LB9 is 5,500 and and they both have the same bottom end....so....should I worry?
As advertized, this governor's WOT 1-2 shift is at 5,500 RPM. My concern is that the indicated redline on the LU5 is 5,000 RPM. But the redline on my '89 LB9 is 5,500 and and they both have the same bottom end....so....should I worry?
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From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: 5,500 RPM should be safe for my LU5 right?
I wouldn't worry about it hurting the motor. If I remember right, I shifted my lg4 at 6000rpm and a couple of times with 12psi added to it.
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Joined: Sep 2006
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From: Greater D.C. area.
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: 5,500 RPM should be safe for my LU5 right?
My LO3 is 4500. It's the optimum shift point, not the max the engine can take.
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Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Re: 5,500 RPM should be safe for my LU5 right?
I've been shifting my L98 at 6000rpm's on a stock bottom end. No problems yet.
Thread Starter
Joined: Dec 2001
Posts: 9,937
Likes: 636
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 5,500 RPM should be safe for my LU5 right?
Thanks guys. I wish I were making power on that last 500 RPM instead of just noise.
Last edited by chazman; Jun 17, 2010 at 12:18 AM.
Supreme Member
Joined: Jun 2006
Posts: 2,199
Likes: 1
From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: 5,500 RPM should be safe for my LU5 right?
Thread Starter
Joined: Dec 2001
Posts: 9,937
Likes: 636
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 5,500 RPM should be safe for my LU5 right?
Sorry no, but the trans shop had a standard governor and a "Corvette governor". I'm pretty sure if you specify "Corvette governor" you'll get that higher 1-2 shift point. I see them advertized on ebay all the time.
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Supreme Member
Joined: Jun 2006
Posts: 2,199
Likes: 1
From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: 5,500 RPM should be safe for my LU5 right?
Ok. I'm wondering because I tried GM #24202117 in a '91 th700r4 and it would not shift at WOT.
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