Im trying to raise the boost on my 1220sl kit and am wondering what the best option for me would be! I talked to CT yesterday and seems I can wait 2-3 weeks for a bigger crank pulley (Does anyone know how much boost I can get this way before I run out of room for the bigger crank pulley). Also what size is the stock crank pulley?

or I can take my mounting plate offand take it to CT to have the holes re-drilled (not sure how much work that would be)

or I can replace the mounting bolts with button heads so that a smaller blower pulley would be able to clear.... sounds like it would be a VERY tight fit, and a smaller pulley often equals more slip


....What do some of you more experienced people think? Would like to go the crank pulley route but have heard theirs only like 1/4 inch of space. I would like to hit at least 400whp.
Thats my goal anyways...

 

bump

 

There are just a a couple of those holes on the Comptech plate that need to be modified. This way you can use a tapered head bolt that will sit flush with the plate like the sos "upgrade" plate Comptech offers.

The bit is what $10, and will be easy to drill since the plate is aluminum. Or I suppose you ca go to the machine shop and have them do it. They might laugh though lol.

The real problem is the self lube supercharger and the associated problems with the small amount of oil overheating by spinning it faster. I'd think about converting to the oil fed.

 

Ya i was thinking the same thing... CT said the internals are dif. from the 1200 and you cant convert it to oil fed... he said ill have to sell it and buy a 1200.

Also I have no problem drilling it out with my drill press... how hard is it to take out... looks like a lot of stuffs in the way. How much boost should i stay below with this kit... 10psi maybe

 

Well the more boost, the faster it's gonna be spinning. There hasn't been a definitive point to where it fail..

Yeah, take out the bracket yourself. It's not hard, just a pain having to take all the pieces out. It makes it time consuming. It's very simple setup though and you'll learn a lot.

The hardware can be found at ace.

 

Every blower has a rpm ceiling, check the Paxton website for verification but its 55,000 rpm I do believe, so if you want to run up to the maximum safe RPM for that blower, its going to be yielding right about 15psi to giveyou a idea of where your aiming. With the current crank pulley, you would need a 3.2" blower pulley run up to 9k rpm, or a 3" run to 8k rpm to get you to max rpm and boost. If your upping the crank pulley size, then obviously you can go bigger on the blower side to yield the same boost, what that breakdown is I don’t know.

 

any more info on crank pulleys or size recommendations for 10psi on a CTSC AP2

 

If you change the crank pulley and go bigger to overdrive the blower are you also overdriving the alternator, water pump etc.... I dont want to loose 10 or 20 hp due to over driving everything else and not just the blower...... hopefully someone can help as this was brought to my attention by a more experienced friend. thx



Also I put Titanium exhaust wrap AND a header blanket on my header and put it back on last night.... Iv started it 3 times and sat for maybe 5 min at the most and I have to turn the car off because it starts smoking like its on fire!!!!! This seems like wayyyyyyy too much smoke and am thinking running both, blanket and wrap, is a No No.....

I really wana drive my car :/

 

The overdrive pulley on the crank is separate from the not overdriven accessory pulley. Only the supercharger get the overdriven belt.

 

Awsome thanks for the info man... So no downside of keeping the big blower pulley and going with a bigger crank pulley? Will I run out of room trying to up the boost with the crank pulley?