LT1 heads guide plates stock?
Thread Starter
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
LT1 heads guide plates stock?
The '92 I pulled apart had guide plates and non self aligning stamped rockers.
My '94 has self aligning rockers and no guide plates.
Were guide plates used on 1992 stock or did someone add these?
-- Joe
My '94 has self aligning rockers and no guide plates.
Were guide plates used on 1992 stock or did someone add these?
-- Joe
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
The 1992-93 LT1 had SA rockers and guide plates just like the L98. The guide plates are not hardened nor are the pushrods. The guide plates were for easy engine assembly at the factory.
GM changed the design of the cyl head around the pushrods sometime in late 93 early 94 that made it easier to assemble at the factory.
Will
GM changed the design of the cyl head around the pushrods sometime in late 93 early 94 that made it easier to assemble at the factory.
Will
Last edited by rklessdriver; Jan 3, 2019 at 07:01 PM.
Thread Starter
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
The 1992-93 LT1 had SA rockers and guide plates just like the L98. The guide plates are not hardened nor are the pushrods. The guide plates were for easy engine assembly at the factory.
GM changed the design of the cyl head around the pushrods sometime in late 93 early 94 that made it easier to assemble at the factory.
Will
GM changed the design of the cyl head around the pushrods sometime in late 93 early 94 that made it easier to assemble at the factory.
Will
Any preference on which head flows better?
I took the motor apart. Needs a total rebuild.
-- Joe
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
If you want a stock head - the LT4 heads were probably the best flowing - but they aren't dramatically better than stock LT1 Heads - and you have two other decent options.
1. If you want to stay stock - contact Lloyd Elliott - he is quite good at porting LT1 heads. If you do a search on his name - you'll find plenty of people on the forum have used him.
2. If staying stock isn't a priority - look at a set of aftermarket heads - the AFR heads are probably some of the best out there... Not cheap - but you get what you pay for....
1. If you want to stay stock - contact Lloyd Elliott - he is quite good at porting LT1 heads. If you do a search on his name - you'll find plenty of people on the forum have used him.
2. If staying stock isn't a priority - look at a set of aftermarket heads - the AFR heads are probably some of the best out there... Not cheap - but you get what you pay for....
Last edited by Purple92; Jan 4, 2019 at 06:48 PM.
Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
Getting 1.1 HP / cid is relatively easy these days and doesn't require a "big" cam. GM was saying over 400 HP from the LT4 heads - their "Hot Cam" and Headers back in the day & I'm sure that a set of 195cc LT heads from AFR will outflow the LT4 heads every day of the week.
If the motor is apart - you might as well go with a stroker crank and an 0.030 overbore to get a 383. Go with a mild cam and a good set of heads - a bit of porting on the intake and then get someone who is good at tuning, and you should be there and have a nice fat torque curve which is just what you want on the street.
If the motor is apart - you might as well go with a stroker crank and an 0.030 overbore to get a 383. Go with a mild cam and a good set of heads - a bit of porting on the intake and then get someone who is good at tuning, and you should be there and have a nice fat torque curve which is just what you want on the street.
