Whats an LT4? Is that Z28
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Joined: Nov 2005
Posts: 700
From: Center Point, Texas
Whats an LT4? Is that Z28
Being a pretty dedicated 3rd gen guy I really don't know about the 4th gens to much. I thought the engines were the Lt1 and LS1 98 and later. What is an LT4?
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Joined: Aug 2002
Posts: 2,356
From: Madison Heights, MI
Re: Whats an LT4? Is that Z28
The LT4 is a slightly more powerful (330hp) LTx motor made for the Corvette's final 4th generation appearance in 96 with the Grand Sport and 6-speed cars after the ZR1 was discontinued in 95. About 100 97 Camaro SS's and just under 30 WS.6 T/A's were made if I remember correctly with the LT4. LT4's had full roller rockers, raised runner heads, no EGR and thats basically where the differences end from the LT1.
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Joined: Mar 2000
Posts: 1,955
From: Point Pleasant, NJ... USA
Re: Whats an LT4? Is that Z28
There are quite a few differences between an LT1 and an LT4 motor...
See:
http://www.grandsportregistry.com/lt1vslt4.htm
See:
http://www.grandsportregistry.com/lt1vslt4.htm
Thread Starter
Registered User
Joined: Nov 2005
Posts: 700
From: Center Point, Texas
Re: Whats an LT4? Is that Z28
Just found this info at http://www.f-body.org/faq/4/4_1.htm :
SS/LT4 - available only in 1997 with all of the standard and optional SS equipment, but the LT1 was replaced by a balanced and blueprinted LT4 engine with 330 HP. Additionally, they got a new stainless steel exhaust system and exhaust manifolds, and a new Bilstein performance suspension set-up. The cars had to be special ordered as 30th Anniversary cars with a 6-speed transmission, and no T-tops or convertible, and they were then sent to SLP for modification. Production was limited to 100 cars.
SS/LT4 - available only in 1997 with all of the standard and optional SS equipment, but the LT1 was replaced by a balanced and blueprinted LT4 engine with 330 HP. Additionally, they got a new stainless steel exhaust system and exhaust manifolds, and a new Bilstein performance suspension set-up. The cars had to be special ordered as 30th Anniversary cars with a 6-speed transmission, and no T-tops or convertible, and they were then sent to SLP for modification. Production was limited to 100 cars.
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From: Atlanta, Ga
Re: Whats an LT4? Is that Z28
Originally Posted by Shackleford
LT4 > LS1, though.
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Joined: Aug 2003
Posts: 3,011
From: Exton, Pennsylvania
Re: Whats an LT4? Is that Z28
Originally Posted by Ray86IROC
I'd say more like LT4 = LS1, and that is debatable. Stock vs stock they both dyno around 300 rwhp, I would question whether the LT4 can match the LS1 mod for mod, but it should still end up fairly close (as the heads flow about the same on both). You get into porting heads and I think the LS1/6 heads would come out on top but I'm not sure...