what blower to get over 15 lbs boost

Just out of curiosity, if..i decided to go with more boost later on .what blower would you guys recommend for boost beyond 15 psi.ati's website states the p600b can flow 24 lbs..of boost. someone find me a 24lb pulley...lol...yea right..... i have a p600b supercharger currently on a 9 to 1 compression engine thanks








Steve

I was running 17psi safely through my T-trim. When I first got the car with a different pulley, the blower was pushing 21psi.

Originally posted by Birdie2000
I was running 17psi safely through my T-trim. When I first got the car with a different pulley, the blower was pushing 21psi.

On a side note: A blower witout an intercooler will make more boost than a blower with an intercooler.

How much power do you want to make? Seems that everyone gets hyped out boost numbers. I think a T-trim or a D1SC would be a good choice for a head unit.

i want as much boost as i could run on 9:1 compression lol..im gonna use the p600b till it blows up...after that...id consider another supercharger just was wondering..whats a step up from the p600b..



Steve

My p600b was maxed out at 12#s. Then I got the D1 and with a 4in pulley it was pushing 15#s. When I get the car back going im dropping the pulley down to a 3.25 or 3.5(as low as I can) to see how much boost that thing can really push.

We have a T-trim on my friends 383, its maxed out pushing 13-14#s.

Originally posted by SteveLT1
i want as much boost as i could run on 9:1 compression lol..im gonna use the p600b till it blows up...after that...id consider another supercharger just was wondering..whats a step up from the p600b..



Steve

Not a very bright idea considering when your blower blows up it will take your engine out with it. Take a moment and think about it. If the P600b encounters bearing failure it will circulate metal shavings back into the motor. Probably not a good idea in my opinion. :D

The P600 will put out 24psi but, it would probably be on a 4 cylinder engine... 12psi is about tops for a 350ci. Don't put more than a 12lb pulley on the P600 or you will break it. A D1 should get you to 15psi and maybe a hair more... 20psi+ and you probably need a F1. Don't know much on Vortech sizes:confused:

idox...theres nothin wrong with the blower right now.....if it goes it goes...etc..all im saying is...if it does fail..was wondering what other blowers are out there that could put out more than 15 psi..i wouldnt want to get another p600b id want to get somethin thats better etc





Steve

Originally posted by IDOXLR8
On a side note: A blower witout an intercooler will make more boost than a blower with an intercooler.

How much power do you want to make? Seems that everyone gets hyped out boost numbers. I think a T-trim or a D1SC would be a good choice for a head unit.

Yes they will. :) Also there was a lot of intake restriction causing the high pressures.

I agree, a T-trim or a D1 would be good blowers. They can both produce a lot of power and still work well on the street. Ditto on the boost numbers. I'd rather make the blower max out at a lower psi than a higher one. It's all about pushing a given amount of air into the engine, psi is just how hard it has to push to get that air in there.

Originally posted by SteveLT1
idox...theres nothin wrong with the blower right now.....if it goes it goes...etc..all im saying is...if it does fail..was wondering what other blowers are out there that could put out more than 15 psi..i wouldnt want to get another p600b id want to get somethin thats better etc

If you mess the bearings inside the blower the metal shavings from the blower will circulate into the engine. That is probably the main reason I would not push a P600b.





Steve

i got the 2.65 pulley which at 6000 rpms at the motor... puts it under its max rated speed of 60000 rpms...hopefully it holds up...dont see why it shouldnt..but if it does fail..i'll be looking at other options..etc





Steve

i am currently up to 17lbs at 5400rpm (havent watched the gauge at higher rpms yet) with a t-trim on my 383 w/ aftercooler and a 224/236 cam.

chevy guy that thing must haul ass....are the t trims expensive? i would just need a bracket the head unit. and some pulleys...perhaps.down the road..thats..what i'll look into..do you have any dyno numbers with your car? just curious



Steve

before i bought it this car made 594 at the wheels. im thinking it should be right around 700 at the wheels right now on 92. ive got a few more things to do on the car and then ill get it on a dyno hopefully in a couple weeks to see what its doing.

the other night i ran a 130lb guy on a 01 GSX-R 1000 with a pipe, filter, and computer from a 50mph roll and walked on him 5 straight times so i guess it must be running decent :confused:

eh...anytime you can roll someone on a bike your doin somethin right lol....if i put 500 to the tires i'll be content heh...we'll see how it goes...the majority of the work is done..the small stuff is left...gettin a tune..some fabrication etc..



Steve

Birdie2000 and Chevyguy3, what pullies are you using to get 17 psi from a T-trim?

I'm at 6.66/2.75 and am seeing 13 psi on an intercooled 383 with AFR 210's and 224/236 cam.

Mike

to be honest i dont know whats on there right now, havent gotten around to measuring them yet but i plan to do that tomarrow. i made the jump from 11 to 17psi just by building my own intake on the inlet side of the blower as well as between the aftercooler and throttle body, putting on a bigger filter, and moving the MAF to the pressure side and porting it at the same time. at the same time i removed the 2 cats that were on the car (one of them well over half clogged, the other ~1/3 clogged) so that probably dropped the boost 1lb or so i would guess from where it would have otherwise ended up. my car for now just has LT1 heads with a light port job and bigger valves, so with the same pulley combo im sure your heads would build a couple lbs less boost than my motor

Same pullies as you Mike, 6.66 and 2.75. It was on a 355 with lightly ported bare casting AFR 195's (around 185cc, flowed about 243 on the intake side). Also had a 222/226 .544/.544 114lsa cam, 52mm throttle body, and the boost was NOT intercooled. Also found out that the intake gaskets were improperly installed, so they were covering the ports by about 1/4". The blower was making the boost, but it shouldn't have had to.

sorry for the late reply. 8" crank pulley, 3.33" blower pulley, so looks like i am spinning the blower slightly slower than you engineermike. making some more changes on the induction before and after the blower again right now among other things. ill post up if they make any difference in the boost #s. also i switched to a Autometer boost gauge this week since i didnt trust the crap B&M one that was on there and the boost #s didnt change any.

Where do you get an 8" crank pulley???

Mike

ASP. with the 8" pulley you have to take the blower drive pulley off the crank to be able to remove the accessory serpentine belt, and it also puts the blower belt close to the fan motors. despite those two issues i still like running the bigger pullies on both the blower and crank so you get more belt contact which is important since im just running a 8 rib