LS3 top end questions
#1
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I have the opportunity to get a great deal on an LS3 top end. I have searched far and wide and cant find what im looking for.
I know that ls2 injectors are taller than LS3
LS2 fuel rail is the same as the ls3.
Will my LS2 injectors work on an LS3 manifold??
My setup will be
PRC CNC ported LS3 heads milled to 66cc
LS7 Cam
LS3 intake
and Full ls7 exhaust
Any ideas on RWHP?
Right now with Vararam, LS7 Exhaust and Ported LS2 intake I believe im right around 370whp untuned.
I figure that after I sell my 243 heads and LS2 Ill ill have to come out of pocket about 600 bucks. Im buying the heads for 900.
Please dont chime in about the LS7 cam. I know im leaving tons of room on the table but ive done the big cam thing twice on previous cars and im not doing it again.
Thanks in advance!
I know that ls2 injectors are taller than LS3
LS2 fuel rail is the same as the ls3.
Will my LS2 injectors work on an LS3 manifold??
My setup will be
PRC CNC ported LS3 heads milled to 66cc
LS7 Cam
LS3 intake
and Full ls7 exhaust
Any ideas on RWHP?
Right now with Vararam, LS7 Exhaust and Ported LS2 intake I believe im right around 370whp untuned.
I figure that after I sell my 243 heads and LS2 Ill ill have to come out of pocket about 600 bucks. Im buying the heads for 900.
Please dont chime in about the LS7 cam. I know im leaving tons of room on the table but ive done the big cam thing twice on previous cars and im not doing it again.
Thanks in advance!
#3
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Regarding the injectors they should work. You just add spacers between the rail and manifold. I had to use taller injectors to clear my FAST LSXR manifold with a stock LS3 fuel rail. I just picked some chrome spacers up from Home Depot in the hardware section.
#5
TECH Junkie
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Regarding the injectors they should work. You just add spacers between the rail and manifold.
I know that I had to use a spacer to use LS3s in my LS2 since they are shorter, but I don't think it works the other way around.
#11
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Last question-
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc
I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble?
My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more?
What do you guys think
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc
I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble?
My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more?
What do you guys think
#12
TECH Addict
iTrader: (7)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Last question-
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc............I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble? My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more? What do you guys think
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc............I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble? My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more? What do you guys think
Off the top of my head, I'd say you're fine with milling another .005" of the heads.
KW
#13
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![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Last question-
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc
I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble?
My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more?
What do you guys think
Since ls3 heads are 69.4cc stock Mine have been milled about .030 to get to 66cc
I know that right now I dont have any piston to valve issues but If the machine shop takes off another .005 to get them flat, am I asking for trouble?
My specs are 211/230 120 LSA .558/.558 lift
The lift is pretty low with my 1.7 ratio rocker.
could I mill even more?
What do you guys think