I have an AP2, non ACed CTSC and Im puttin down 297 whp. I dont know the difference between the VT and the CT but when I had the VT on my AP1, that came with 7 lbs from the company and it worked just fine. Tinkering with the CT to make it 7 lbs would require a lil modification because Im assuming the black box from CT is programmed to deal with 5 lbs.

Im planning to up the boost too....OP, if you care to know, PM me and I'll letcha know my plans.

 

Just picked up the AC. So now Hopefully i put down over 300 with the vafc. Will install this week.

 

Please post the results. Id like to see em.

 

-stock ap1/4.4" 5.5psi average -280whp

-ap2/4.2" pulley will net 6.5psi at 9k rpm average -300whp

- 4" pulley at sea level nets me 8psi at 9k rpm ave - 320whp. SOS use to advertise as such but recently made changes to their claimed pressures, by reducing them 1psi across the board. Not sure why, so the 4" is now claimed to produce 7psi.

If your still running stock breathing ie: header/cat exhaust & TB. You should be able to run the 4" pulley with factory comptech system/no management. 4.2" would be playing it safe with the 1psi increase. The issue is being able to deliver enough fuel with the stock injectors and rising rate fuel pressure regulator. When you ad breathing mods your fuel requirements go up. Its a tight balancing game depending on your car and ability to make a good compromise with your tune. The vafc is an integral part to this as you will need to remove fuel pre vtec the more you compensate with the fpr for the higher boost.

The ap2 Comptech kit being sold today come with a different flowing fpr, they deliver a quicker fuel ramp up and is a good upgrade on ap1's with increased boost. You can purchase these from CT Engineering for about $300. You will need to reuse your fuel line from the other fpr if you do this.

The Non after cooled set ups net very similar numbers to the A/C kits, and in some cases more when the AIT is in check. The .5psi gain in most circumstances offsets the higher AIT. But the issue with non aftercooled systems are their inconsistencies with AIT, higher heat soak tendencies in traffic and sensitivity to outside temps. Much higher tendency to ping/detonation which will make short life of your motor. I would never run this kit without one.

 

[QUOTE=s2000Junky,Jul 12 2010, 08:22 PM] If your still running stock breathing ie: header/cat exhaust & TB. You should be able to run the 4" pulley with factory comptech system/no management. 4.2" would be playing it safe with the 1psi increase. The issue is being able to deliver enough fuel with the stock injectors and rising rate fuel pressure regulator. When you ad breathing mods your fuel requirements go up. Its a tight balancing game depending on your car and ability to make a good compromise with your tune. The vafc is an integral part to this as you will need to remove fuel pre vtec the more you compensate with the fpr for the higher boost.

 

Great post guys. Tanks for the details. I still have the stock cat but with a test pipe. So depending on the pulley size I receive today I will probably order a 4" pulley. As for Noe just want to run the stock injectors and ecu until I find a great deal on an aem ems.

 

If you need a specific sized pulley give ASP a call, they will make any size you want.

 

Regarding it being lean at readline, if i have the stock exhaust with testpipe do you think I would have that same issue running a 7-7.5 psi.

Regarding ASP, do you prefer them over science of speed. How are their prices if anyone has used them before?

One more thing, just to confirm what I searched here, the VAFC can add fuel right? I know it can remove fuel.

Reason i ask is if I were to get the 7-7.5 psi pulley, and i up the FPR, would I be running like crap normally or would maxing that out just mean when the boost is kicking in? I have read normally they up the FPR and then lean it out with a vafc. Is that the best method?

 

You will be riding the line of fuel delivery so watch your afr closely. If you can find one, the ap2 4.2" pulley would be the way to go and should get you right about 300whp with 6.5psi.

No you can not successfully depend on the vafc to add fuel, it only removes fuel with our ecu, if you program it to add fuel it will just hiccup and freak out. You increase the fpr to max safe pressure aprox 95psi at redline. The result of this setting will make afr safe in vtec but run too rich bellow vtec, so this is where the leaning of the vafc comes in. You also get the side benefit of lowering vtec. 5k is a good compromise since it will engage at rpm and not load like stock. Partial throttle tune will remain very close to stock.

 

Just got the SC in..

Had two quick problems when comparing a picture I had of what the stock system should come with. It was missing the ESM and the alternator bracket.

I have emailed the seller in regards to this to get a credit for those to Items but I can only find the ESM for sale. Are these alternator brackets necessary? Can I just call CT engineering to get them or is there a way I can go locally somewhere to pick up these piece?

Thanks again,