Hey All,

I've had my SOS Novi 1220 kit on a my03 for a couple thousand miles now and I'm wondering if I'm getting the proper power out of the kit. Below are some details. Dyno sheet attached as well.

Paxton Novi 1220 Supercharger
SOS 3.8" Pulley (Estimated for 10.5 psi by SOS)

AEM V2 EMS
RC750cc Injectors
Stock Fuel Pump (I was assured this will be sufficient for the power range)
Stock MAP sensor
Stock Cat
OEM NGK Plugs
SOS Aftercooler
Upgraded to larger heat exchanger


Other Mods:
Invidia Q300 Exhaust

IIRC I'm right around 10.5 psi. I don't have a wideband to monitor AFR. I think the car is running rich if I'm not mistaken (oil smells of fuel and more than usual exhaust/fuel smell when parking) not sure if that's normal. I put down just about 310whp when tuning on a DynoJet dyno.

Any input is appreciated. Also, if anyone has an idea of what power level I'd be looking at with a 1200 blower + 3.2 pulley (approximately 16psi) and what the recommended supporting mods would be.

 

Different dyno (Dynapack) but other than that, I'm running an SOS 1220SL kit with a 3.8inch blower.

10.5PSI --> 378whp/240tq

I have ID1000s, AEM320 fuel pump, 3bar map sensor, step colder plugs, ASM 70mm exhaust and a TP.

Even though your dyno reads lower, still seems low to me.

 

Get a fuel pump asap. And curiously was this tuned ? It shouldn't run rich if it was it should run correctly. I think it's down on power. Should be in the 340-370 range.

 

I would be seriously worried about running out of fuel and how well the stock map sensor is working for that boost level. I was always told the stock map sensor can't read over like 9-10psi.

Bigger fuel pump, bigger injectors, better map sensor and get an AEM or Haltech unit to get it tuned on.

It's also my personal opinion that with any modded car, it's always a good idea to have a wideband to monitor your afrs. With boost I would want to have a wideband and a boost gauge to make sure I was making full boost, had no leaks and knew that the afrs are in a healthy range.

 

You need to get a MAP sensor ASAP. The factory sensor can only see boost/voltage just over 10psi. SOS, omni, AEM Hondata, all good, just get one.

 

Its currently tuned on an AEM ems and injectors are listed in OP. Are you suggesting bigger than the 750s or did you miss that part?

Would it not be prevalent if there was a lack of fuel due to fuel pump?

I've read that the stock map is good for 10-12 psi but I still see your point.

Thanks for all the input so far guys.

 

Sorry, I did miss that part. I think I was under the assumption that you were using the sos black box thing. 750s are fine. And it wouldn't necessarily be prevalent, it could just be running out of fuel up top and running lean, causing a loss in power.

 

it is a centrifigual blower, so you can cheat and use stock map. but i would swap that pump out for sure. tuner prolly cheated on both stock pump and stock map, but 310 is way down for 10psi on that blower. well, wait, what elevation are you? i guess i just say its down on power , cauase on 10ish psi on my roots blower i was in the 330-340 range. and centri 1200 blowers usually belt out 350sih. on my turbo setup 10psi was 400whp. possibly that blower is just inefficient and has to spin to 10 psi to move some air. ehh.

 

Thanks for the input. Can you clarify what you mean by cheated on both stock pump and map?

I'm pretty much at sea level.

Gonna be picking up the recommended items. Wondering if running as is has had any negative impact? Anyone?

 

so a centri blower with a 10psi pulley makes 10psi for what, like 1k rpm up top. so you can cheat and just add fuel where the map sensor flat lines and still make the tune work. its not the worst thing in the world, just not ideal. as for the pump, i just think you ran out of fuel up top, so he retarded timing to compensate for the lack of fuel. again, a patch and didnt maximize your setup. just guessing though. regardless, i would swap both and get a retune. i would also add a wide band and have the tune setup with feedback.

again, just if it was mine i would do it.