bluenote

Hey Guys...so I just installed a CTSC w/ a FMIC using a 7lb pulley. Im losing 2lb of boost due to the FMIC. So I figured if I run a 9lb pulley I would end up w/ 7lb of boost figuring in the 2lb loss due to the FMIC and I would not need any engine management......My tuner says 'maybe..maybe not'
SO my question: Has anybody run this setup (9lb pulley on CTSC,no engine management) and if so, how did it work out?

s2000442

I personally would not risk it. Spend the money, get the injectors and ems and do it right.

jaundice

I did exactly the same thing on my CT setup. WIth the 9 lb pulley I was seeing 7 lbs of boost at WOT and 9K rpm. With my wideband, I was staying in the 13 AFR range in VTEC at WOT at 9K rpm. HOwever, my plans included an AEM and injectors to go to the next level, but decided to go to turbo instead.

Just my .02.
B

s2000Junky

Yes its possible, even more is possible if you are experienced. But If I were in your position of just learning the limitations of the set up, I would start out with a pulley that nets less, like a 4" just to be safe. You need a wide band to check your afr first off, you need to see exactly where you are before you know where you can go. So you should be the tuner if you want to go down this road ideally. I'll throw out some info for you if this is the case, if not then disregard.

An ap2 CT fpr produces more fuel at an earlier rpm then the old ap1 kits and will allow you more to work with.

Also you can use water/meth injection as a secondary fueling source as well as a detonation suppressant to run the higher boost level safely without the need to retard timing. This is a crucial piece of the equation once you start netting more then 7psi, obviously since you have no mechanical way to effect the timing with this set up.

Your target afr is 12-12.5 If you decide to incorporate water/meth injection you can safely get away with leaner, Ive seen spikes into the low/mid 13's when tuning a set up, but these are spikes, which are allot different then constant running at that afr. You can get away with leaner with the injection but its not something to shoot for or get real comfy with, after about 13afr you lose power FI anyway. You want to see 12-12.5. As long as this is your target then the rest of your set up will dictate what pulley you can get away with on those stock injectors. For example, if your running a TP and big single you will likely find you run out of fuel to use at a lower psi then someone else with a factory breathing system, same as motor selection, f22 needs more fuel at lower rpm and boost over the f20.

Good luck, not everyone is comfortable going down this road and its not widely accepted, but those few of us that still have to take emissions and don't like the compromises of running a piggy back with bigger injectors, this is an alternate path that has proven for me to be more reliable and simple then any other option available.

I'm currently netting 9psi f22 @ approx 350-360whp. Its my daily driver, all 100miles a day @ 25/28mpg

woo

There is a member in the Vancouver section running 10psi vortech s/c ap1 with stock injectors and black box. He is running a water/methanol kit though... I wouldn't do it though, I have an unused emanage blue I can sell you for cheap if you are interested.

s2000Junky

I think we have met on a few drives actually. I know the set up sounds scary but actually its proven to be very reliable and I still get the benifits of OEM fuel mileage and great partial throttle running. Not something i'm eager to give up. 350ish is pretty good all in all.