Between 80 to 85. I got the pulleys from procharger with the kit.

 

If you're looking at any Magnacharger for a 370 with only 9.5:1 compression you'll only want the TVS2300. The MP112 will have a hard time making 8psi with your setup unless you buy the larger crank pulley which makes the blower great to warm your hands after a pass when spinning it that fast. The big problem with that is 8psi with that low of compression is pointless. With compression that low you'll want 15psi or more to get anywhere near your goal. If you want to run that level of boost hands down you'll want a Procharger if a turbo isn't in your interest. For 12psi and down it's hard to beat the TVS2300 and in fact for boost of 12psi and less I'm not sure there is a better blower. The SSR we recently did weighed in at 5180 and at 2300ft altitude ran a 11.001@123 with about 11psi. We could have made the same power with a Procharger without a problem. The Magnacharger is kick *** due to it's design of sitting on top of the motor. The blower takes place of the stock intake and doesn't take up alot of extra room and doesn't need all of the boost piping. The Procharger though pretty much can't be beat for higher boost levels. You can put pretty much any form of intercooler that you want with it. Upgrades to larger units are readily available. You can run your choice of injector since you are putting them in the stock intake (or can opt for an aftermarket intake). The low end torque thing is funny to me. A properly tuned D1SC makes all the low end torque you'll need. I worked on an SS Silverado occasionally for a friend that had a stock LQ9 with headers, cat back, D1SC, shift kit, and 2600 Yank converter. That truck had enough torque with that 2600 stall to spin all 4 tires for 10-15ft by simply stabbing it off idle. That truck was 5400lbs or so. It would make 5psi by 3000 and jump up from there. To add to that point as most have said, who mods there truck and doesn't change the converter. Even the Magnacharged trucks run a higher than stock stall so if you're putting a converter in either way why not pick the stall for your setup. The point of boost when driving around is kinda two sided. The blowers that are really twisted up make boost at very low throttle causing you to end up driving around in boost alot. This is terrible for gas milage and more stress on the motor. Both blowers are excellent. I love the TVS2300 and the D1SC for a street/strip truck. Both have their places and advantages. For a low compression motor though I totally recomend the Procharger.

 

I don't get the whole prochareger blowers don't make low end torque either. You guys should listen to Zippy as he is one of the few who has built and tuned Magnason and Prochager vehicles and seen the results. I see alot of guys backing there blower which is great and then turn around a speak out about the other type of blower and how it works and its performance with no hands on experience. Oh and this is for the guys who don't thinks Prochagers make boost or toque the second you stab it....stock bottom and heads ls2.....9psi d1sc....awd...http://www.youtube.com/watch?v=JOvG_2Y-aN8

 

Mangled whenever youre ready I'll run ya.

 

Excellent points on both sides Zippy! I think both have their pros and cons and I side with you on this. One other question or thought around this topic:

Long term reliability?

I know of maggies with over 100K no problem. I've even heard of these blowers going 200K! Not sure about the centrifigal blowers doing that? Anyone have any experience with this? Great discussion btw!

 

Ohh its going to happen..

 

hey mangled were you building a 370...??

 

Yes

 

is the p1 going to be able to fed ..... do you have the link of the thread..??

 

What thread?? I am going to see what the P1 will do with the smallest pulley, hope the innovators west 8 rib does for me, as it is 10% overdriven aswell