Nolimits31

i dont know if my maf is pegging or not how do you tell? i had my car dyno'd at 10psi and only got 346rwhp and 363tq. my car is a 2002 gt with the kb and i/c.

bs46488

Did you use the factory MAF, what size injectors are you using?

Nolimits31

it is the factory maf and injectors that came with the kit are 36lbs and matt at kenne bell said there good for 450rwhp+.

Eagle2000GT

One way you can tell is by the MAF voltage output. It will peg and then go flat. I could tell mine had pegged by the way they were forced to tune the A/F ratio. They had it running rich mid-range so it wouldn't go lean at 6k rpm. The stock MAF is good to about 350 rwhp. To get my A/F ratio correct I had to get a MAFia and a new tune.

Nolimits31

yea by me getting the kb big tube kit it comes with a 90mm maf and they retune my chip they send out with their kits. i plan on doing this once spring arrives. i just thought 346rwhp @10psi is very low on a i/c twin screw and this was caused by my maf pegging which i think might be or kb tuned my chip to stay below that level since it is the stock 80mm maf. i had my car a mustang dyne not a dynojet and the owner of kenne bell states that mustang dynes are not accurate. is this true? maybe i have more power than what the dyno is telling me. also this mustang dyne did not measure my a/f ratio so i have no clue what kenne bell has me running at.

Eagle2000GT

My first tune was on a Mustang Dyno. It's accurate (some say more accurate) but different than a Dynojet. It is generally thought that Mustang Dyno will come in with a lower rwhp than a Dynojet. My second tune (several months later) was on a Dynojet. The first pull before the re-tune was exactly the same as the Mustang Dyno.

I'm not a expert, but I think 36 lb injectors might be a bit small for 10 lbs of boost. I'm running 42 lb injectors. Before I bought the ProCharger I looked at a Saleen twin-screw. It came with 36 lb injectors. They said if I was going to change the pulley I would have to buy new injectors. That was one of the reasons I when with the ProCharger.

Whether its the MAF or the injectors, I think you should be getting more than 346 rwhp with 10 lbs of boost.

Nolimits31

yea i talked to matt over at kenne bell about the situation and he told me the 36lb injectors are good for over 450rwhp thats why they sell them with their kits. idk see im in a situation where i have no real experienced tuners in my area, the closest one is about 3-4 hours away. so i talked to the guys over at kenne bell and highly recommended me getting that big tube kit and 90mm maf switch chip and they retune the chip they sent the first time to me. any advice would be helpful.

Obsequious1

I'm running 42lbh injectors and a lightning 90mm maf with 10psi. I don't think I could've made 380/375 without them. If you look at some of the kits they sell on superchargersonline.com they recommend larger maf, http://www.superchargersonline.com/p...=PC-1FE212-SCI
Even on the 8psi kit, its has 42lbh injectors.
If I were you I'd upgrade and have it dyno tuned.

Nolimits31

i found this chart...

Injector Size

19 lb. 276 hp
24 lb. 349 hp
30 lb. 436 hp
36 lb. 553 hp
42 lb. 611 hp
55 lb. 800 hp

Obsequious1

Then I guess your 30lbh injectors are fine. Now where is the chart for MAF.