1986 Monte carlo SS engine swap

[jevon09]

I have a 1986 monte carlo ss with the factory 305 hp I want to swap it with a 6.0 gm ls with 325 horsepower out of a chevy Silverado.....from my understanding my car weights 3,387 pounds which is almost less than half of the weight of a Silverado?
I want to know since my car is lighter will it produce more than 325 horsepower with the factory 6.0 gm ls engine?

[maxwedge]

Welcome to AF. How does the weight of the car change an engine's hp?

[jevon09]

Yes that's the question I'm asking.

[Tech II]

Good one Max!

[maxwedge]

Not sure where you are going with this but 325 hp is the same whether it is sitting on the ground or in a car/truck. Obviously your much lighter MC would be way quicker than the truck the engine came out of.

[jevon09]

And what can I take off are add to this motor in order to gain more horsepower? The basics

[maxwedge]

Unless you really want to race competively I would leave it alone, just good exhaust and gearing, you know you will need a compatable trans set up as this is an all computer controlled engine so plenty of harness changes will have to be done.

[jevon09]

I have 3.73 gears and planned on putting a set of 243 heads with a ls3 are ls6 intake with a street cam and as far as transmission I planned on going with the 4L60e are the 700r4. What do you think about the combination if I didn't stay stock?

[maxwedge]

Sounds like a plan.

[jevon09]

Do out think ill get anywhere from 425-500 horsepower when I'm done and I also plan on putting long tube headers on with straight to the back true duals and.maybe flowmaster super 10 series mufflers

[maxwedge]

I don't with stock heads you will reach those power levels. Check some of the LS build- ups by various magazines online.

[jevon09]

OK kool thanks

[jevon09]

So where do you guess my horsepower will Max at?

[maxwedge]

What are the specs on this street cam?

[watkiichael6]

Time to get down to business.