what kind of hp am i missn out on by doin a 360 instead of a 408?

 

That is a weird question. Because most people that do 408s do BUILT 408s (Heads, cam and supercharger).

For a STRAIGHT 408, with stock heads, cam and maybe JUST bigger injectors (tune is assumed as well). you are looking at about 290-300 RWHP but boatloads more torque.

For a BUILT 360 you can have the same HP, with a bit less torque. BUT you can do it two ways:

1. Heads, cam, 24# injectors, headers, ignition upgrades: About 280 HP and 340-360 torque.

2. SUPERCHARGER (6 lbs boost), stock heads, stock cam, 1.7RRs, headers, ignition. You are looking at more HP than a 408 and a bit less torque.

SO, for the price of that block, you can have about 90% of the cash for a supercharger kit.

If you are doing a 408...you will need all the goodies for a built 360 to really bring it to life.

Here is your question rephrased:

1. WHat is better, a half assed 408 or a built 360.

Answer: built 360. If you want to go 408 later down the road...you have good parts to swap.

If you are going more 8 lbs of boost, I believe that thicker head gaskets, bigger injectors, ARP rod bolts and QUITE POSSIBLY ARP head studs are necessary.

But I think supercharger or rear mount turbo is a better setup for someone your age. However, I think you should just start siomple, unless you have someone doing the work for you/helping you.

 

do they make a roots style supercharger for our engines? the only one i could find was a procharger $4500. is that 280/360 at the wheels? should i not get 1.7's with a cam?