Ok, My LT1 has a spun rod bearing" A month after I cammed it"
So I have a 355 LT1 with a eagle crank"cast"new stock rods and forged pistons. I plan on going LE2 with the heads. How much boost can I run safely?
Im thinking 7psi intercooled with a 11:1 compression ratio I think thats all I could run.

Opnions?

 

If buying new pistons anyway why not get some dished pistons to lower the compression ratio and run more boost?
11:1 is a lot of compression to run any boost but, you could do a little.

 

I thought so. But I already have the pistons.

 

3-4 lbs i would say, nothing more with that high ratio

 

So, instead of being able to run 13 psi boost at 8.5/1 and making 740 hp, you're going to run 6 psi boost at 11/1 and make 630 hp all so you can save a few hundred bucks on pistons even though you've already spent thousands on the blower kit?

Mike

 

Ah, perspective.

 

If it isn't assembled yet I would sell the pistons and get some dished ones as others have mentioned. You could also consider going with aftermarket heads with larger combustion chambers to reduce the CR.

 

im in a similar situation if i leave the stock crank get forged h beams and forged low compression pistons i could run 13 psi and not have to worry about it blowing up?

 

Some people will argue that you may need to look into getting a forged crank as well. Others will say you are fine. The fact of the whole matter is this; If you want to have a high RWHP blower car that you don't have to worry about the motor coming apart, you are looking at spending at $13,000-$15,000 for the quality parts needed to hold up to everything. Not to mention the possible additional thousands you will need for the supporting mechanisms of your car, such as driveshaft, clutch (or tranny), rear end, ect., ect., ect,.

Now, if on the other hand you only want to spend $7,000 on cheep parts, and skimping out on possible weak links in the motor, you might be able to eek out slightly less HP but it won't be reliable.

Do you want an expensive high HP blower car that you don't have to worry about?

Or do you want to cheeply build a blower car that you probably will be repairing on a regular basis, and may end up dumping more money into in the long run to keep it running?

Or you can always keep your compression high, and spend thousands on the supercharger, only to run low boost, and see small HP gains.