i currently am making 9.5 psi on my d-1procharger, and i am thinking of going alittle higher on boost. would my stock bottom end handle 12 psi. i am at 612 rwhp right now on 9.5. by the way car is a 2006 c6 m6 with 1 3/4 headers and full exhaust, meth, bov and 60# injectors.

 

I think your bottom end will be OK, but you may want to beef-up your tranny and rear end sometime soon. JMHO

 

It's a "do you feel lucky" deal. Some do fine at well in excess of those numbers. Some shoot craps at less. You and your tuner have a lot to do with it too. If you're a mullet that routinely phuques things up.....Or if the guy tuning your car is a mullet....well, you get the picture. More also to do with whether you can afford the consequences. Not a fun game to play if a shattered motor, tranny, clutch, diff matters in the grand scheme of things.

 

I think you should get a cam and not worry about boost. Stock bottom end LS3 here on 10psi making the numbers in my sig with a D1.

 

If you have the procharger kit get the dp intake. It's cheep and should pick up good power. Other than that what pulley are you on. I'm making 652 on abt 9 psi

 

Yep the Dallas Performance big mout intake is a must also.

 

What pulley? I'd pulley down and leave for the cam until you need to be in the motor.

 

08 z51 m6 at 10/11 psi.. So far so good knock on wood!... crank it up!!

 

I cant remember what size pulley i have! i djust know that it makes 9.5 psi. at the track last friday night i had some belt slip issues. so i guess i will just go ahead and pulley down. i went from 537 hp at 7 psi to 612 hp on 9.5 hp so i guess i will be looking at about 687 on 12 psi. does the pulley have the sive written on it anywhere?

 

If you have belt slip issues now.....guess what's going to happen if you pulley down and add boost. You probably should solve your belt slip issues before going for more

 

It will say pulley size on the pulley. Usually on the motor side on mine. Its probably a 4.68" I would guess. You should not have slip issues with that setup.

The Dallas Performance big mouth inlet is worth 25ish hp on a setup like yours.

 

Will the Big Mouth fit under a stock hood?

 

Yes it will.

 

Thanks

 

For the cost of the big mouth with filter and radiator cover it's almost not worth the cost. (I was interested in it myself) I would toss in a good blower cam and have a lot better performance.

 

Pick up 40hp for a little over $250 is bang for the buck.

 

They have the filter on their site for $300 and the cover for $150 (personally I wouldn't want to cut my Procharger cover) and their advertised gains are 20-30hp. I know most get near 40-50hp but I'd rather go with a simple pulley swap and get that power but since the OP has belt slip issues and wants power I think a cam would definitely help out. Will gain power and if it's a proper blower cam it will also decrease the boost.

 

I did it last year. Gained 38rwhp, paid $275, and it wasn't much that needed to be cut. The stock Procharger setup is a restriction. I agree a cam is a must so is the big mouth intake and my sig is evidence of that.

 

I agree on the procharger intake. It's a pretty awful design and it's a pain in the *** to have to remove to clean as well. I'm just trying to help him gain power and not have too much boost which I think is an alternative he would be looking for. The stock bottom end may be able to live up to big numbers (742 in your case) but some engines let go way before then as well. He never did say what numbers he is going for or what his limiting factor is besides the bottom end. Too free flowing of an intake would increase his boost and just add unwanted stress on the engine.

My current build is good to about 800hp but the clutch maxes out at that so I'm trying to keep it around 750. I've held off on the big mouth intake because the pistons and cam I have selected would give me a lower boost reading but make a ton more power than I can with stock parts. The big mouth would of pushed me 30-40hp higher than what I wanted to go. I'm probably going to trade off the price of the big mouth for a quality catch can instead and try to save the new engine from excess blow by oil.

For all out power hell yeah get that intake I've seen it make plenty of power on here. If you're concerned about boost pressure then spend the extra cash on a cam. Get a wider powerband and have less boost pressure to worry about.

 

Less restriction is less heat. They say its supposed to pick up 1-2 pounds of boost but I only picked up .75 so that made it even better.