So I just picked up a comptech supercharger kit and wanted to see what suggestions you might have for parts i will need. The kit has no pulley so I wanted to see what size would be good? I'm hopefully looking to make around 350hp.

Also, wanted to know if headers and test pipe would make a big difference? I don't really want to get an exhaust system but would like to know if it would be significantly better to have one or if the stock one will restrict certain power?

 

Do you have engine management? If you want to make around 350whp you will need stand alone ecu, injectors, MAP sensor, clutch etc.
Is the kit you got aftercooled? If not I would look to get an aftercooler kit. A nice upgrade is also a larger heat exchanger for the front.

Test pipe would be good for tuning. Can allow vtec to be adjusted much lower down for a very nice smooth transition. Header is not needed. Neither is exhaust. Might gain a little from both but not needed.

 

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I don't have any of these yet but I'm planning on going with an aem system , some id1000 injectors not too sure about map sensor or clutch yet. The kit does however come with an after cooler so that's ok

So it seems headers, exhaust, and test pipe are all optional but not required, if test pipe is good for tuning I might as well get one

Any suggestions for what size pulley maybe between moderate and aggressive and what boost (psi) is equal to?

 

Not sure on the comptech pulley sizes. If getting tuned with aem etc I'd go for around 12 psi or so.

 

I put down 372hp at 14 psi (SOS 3.6" Novi 1200) with a 70mm HFC, comptech 4-1 header, 70mm cat-back, AEM EMS s2, ID1000s... Once you get close to the 400hp mark, I've been told it is a good idea to go with a header and TP.

Are you running an AP1 or 2?

 

I am planning on running this heat exchanger to replace the "racing heat exchanger" from SOS.

http://www.siliconeintakes.com/produ...2f3c60b1e08473

It's bigger, set up better (in-flow and out-flow ports are ideally placed), includes a drain plug, has a temp port, and is cheaper. Win all around.

 

As for the Comptech kits with novi1000 blower) 3.6 -3.2" sos pulley is the size range that will get you to your goal range. Being supercharged, the higher rpm you hit, the more boost you make, so it’s important to factor this in when making a pulley choice, are you ap1 or ap2? Where will you be redlining?

If you just want to give it a go since you will be having the engine management to handle it, to max out your blowers impeller speed and get the most use out of it, running a 3" pulley to 8500rpm hits that mark. You will see about 14-15psi or aprox 400whp. With each pulley size change ie: 3.2, 3.4, 3.6 etc.... you will gain/lose 1- 1.5psi fyi.

I agree, don’t bother with the header, a Test pipe is the plug in the system and the cheapest to replace. A cat back will help but only secondarily, not as important.

3.6" pulley taken to 9k rpm is typically enough to get you to 350whp, that is 10psi. If you’re only revving to 8k, then you will need the next size smaller pulley 3.4" Make sense?

 

Same one my buddy got

I chained two factory size comptech heat exchangers together, my buddy had an extra now obviously. Still not quite as much fluid as this monster, but it seems to be an improvement over the one small one, temps are being managed well for spinning my blower to the max. And hey it’s still quite a bit lighter, so I guess that’s a positive. I run water/meth injection in junction, so its likely not as imperative for me to run 20lb of fluid over the front of my bumper

 

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I have an ap1 so it's redlines at 9k, if to say I go with a 3.2 pulley which is around 10psi, will my redline change? And also I read somewhere that the smaller the pulley that you might have to change the compression lower?

 

The 3.2" pulley will get you 12-13psi at 9k.

3.6" will get you 10.

Your redline changes only if you want it to, through set up of your engine management.

No you will not need to lower compression, our motor handles up to 15psi typically on pump gas without issue, assuming you have a proper tune. SC is more forgiving to tune at higher pressure then its Turbo counterpart. You only see max pressure at redline. Less heat and less sustained pressures. Those companies that recommended lower comp headgaskets or built motors at 10-12psi+ just want to sell you merchandise and or are out of the current loop. Back in the early days, it was thought that an 11:1 comp motor such as our was running the edge at 6psi. There are several guys now making 600 and 700whp+ on stock motors with high octane fuel or meth injection.