JollyRoger44

iTrader: (4)

Ok i have a 99 LM7 short block that i am going to have done over at the machine shop including boring it out to LS1 spec's. I am going to be reusing the stock 5.3 internals (crankshaft, rods). I will be ordering custom push rods once i get the block back and measure it out. I have listed some engine details below.

LM7 Block bored to LS1 spec's
LS6 cam
99 Port and polished 5.3 heads
Stock LS1 pistons
LS1 intake will be upgrading to LS6 intake when i can
LS7 lifters
stock injectors


I am not looking for big hp numbers, all i want to know if this setup will work together without eating itself.

Thank you LS engine gods... A men



I have searched and searched for answers but no real answers....

rtrygstad

That is a really mild build. I wouldn't think you would have any problems.

JollyRoger44

iTrader: (4)

Im doing a v8 240sx swap btw.

orangeapeel

iTrader: (18)

Have you weighed the costs of just picking up a block that is all ready to go vs. having machine work done to the LM7?

garygnu

tr224 cam

orangeapeel

iTrader: (18)

Sometimes your posts come across as if a robot was typing them.

JollyRoger44

iTrader: (4)

Anybody else?

JollyRoger44

iTrader: (4)

Anyone see any problems with my build?

JollyRoger44

iTrader: (4)

Bump?

1SLwLS1

iTrader: (6)

Thats the only other logical choice.

Mkelcy

iTrader: (3)

No "problems" as such, with your build, but you might consider going with forged pistons on the stock rods/crank for an extra margin of safety if you later decide to push it.

JollyRoger44

iTrader: (4)

I have decided. Im going to try and get a complete engine (there over priced here) and still build this one.

The_Rizzle

iTrader: (4)

you could just get a set of ls1 rods/pistons together, saves some work getting them installed. Low mileage sets on here go reasonably cheap.

With the extra compression of the 5.3 heads/ls1 bore you really should consider a slightly bigger cam. Theres aftermarket cams that let you use ls6 springs in the for sale section that should help wake up your build.

LilJayV10

iTrader: (39)

Schwanke engines, who is a sponsor, has a pretty good price on a 5.3 shortblock thats been bored to a 5.7. Just a thought.

JollyRoger44

iTrader: (4)

I'll have it bored locally that way i can watch the build myself. Anyone else?

Schwanke Engines

iTrader: (1)

Looks like a good setup to me. Just make sure you get the LS6 cam installed around 112 on the intake. Should make great power and have a hint of chop in it.

garygnu

must kill all humans.do not compute.

Arc00TA

iTrader: (17)

I would consider that the 240, being a light weight car, you may want to use an aluminum block to keep your weight distribution good. Otherwise looks like a solid build.

JollyRoger44

iTrader: (4)

Sorry for the late bump but i want to either go to spray or F/I after awhile and i like the iron blocks better even though there heavy.

JollyRoger44

iTrader: (4)

Bump... Has sat awhile and wondering if anyone has anything to add?