Which injectors and fmu disc would best suit my combo?

1

1bad92lx

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Mar 31, 2003

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Sep 20, 2005

#1

• Sep 20, 2005

• #1

First off I have no local tuners that can burn a custom chip so I will have to do all the tuning myself. With that said I need to be as close on with the tune as possible so I can be safe when I first run it to start tuning. The combo is as follows:

Paxton Novi 1000(6lbs boost for now)
8.5:1cr 306
Eagle forged rotating assembly(stock block)
Afr 165's
FMS E-cam
Gt-40 upper and lower(unported)
70mm tb
255lph in tank pump
bbk adj. fpr
bbk 1 5/8 shorties with matching off road h-pipe


I will have a fuel pressure gauge and hopefully a innovate lm-1 wideband also to aid in the tuning process. I need to decide on which size injectors and mass air to get. I'm guessing somewhere around 24-30lb would work with an fmu hooked up. What size fmu disc should I get with what size injectors?

 

Rick 91GT

Mustang Master

Nov 29, 1999

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Sep 21, 2005

#2

• Sep 21, 2005

• #2

36# inj NO FMU

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Sep 21, 2005

#3

• Sep 21, 2005

• #3

I say 42lb since its only a matter of time before the powerpipe goes on and those stock pulleys go in the trash

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

95

99

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www.rnhperformance.com

Sep 21, 2005

#4

• Sep 21, 2005

• #4

When we had a similar combo on our A-trimmed 331 the 36# was more then adequate. The GT-40 will hold it back from making big power. We made 425/465 to the tires and the 36# inj were only at 68% duty cycle at 5900rpm...plenty of fuel.

255lph Hi-Pressure pump, T-rex, stock lines and Aeromotive rails. We pulled fuel out down low with the PMS, and I think base pressure was at 37psi.

Now if you want to upgrade to a larger blower, and crank the boost up...42# would be my choice along with some type of tuner...

 

D

Daggar

New Member

Jul 19, 2004

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Sep 21, 2005

#5

• Sep 21, 2005

• #5

I also vote for being FMU less. You're going to need a way to tune it yourself though. The Anderson, the Tweecer, or whatever other system out there that floats your boat. Plan on spending cash on one of those systems.

 

1

1bad92lx

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Mar 31, 2003

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Sep 21, 2005

#6

• Sep 21, 2005

• #6

If I go without the fmu will I have to get an aftermarket tuner like the pms? I wouldn't mind not using the fmu but then I'm going to have a way rich idle. For now the cash is tight and I will get a pms next year but I wanted to get it going in the next couple months. Should I just wait until I can get the tuner or just go ahead and put it all together? BTW, is the AFM PMS easy to use? I like the look of it better than all the others on the market.

 

D

Daggar

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#7

• Sep 21, 2005

• #7

Very easy to use. Even Grn92LX can do it!

 

Grn92LX

Fidanza Man!

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Sep 21, 2005

#8

• Sep 21, 2005

• #8

Like old man Dagger said, the PMS is fairly easy to use. It will be tricky at first but after a little bit you'll get it. If you buy it new, AFM will give you a base start up tune. You have to fill out a sheet and fax it to them and they send you a base tune.

My car would be a piece of sh it w/o my PMS and wideband

By the way, do you happen to have a dyno sheet from your old ported TW headed/N-91 cam 331 combo?

 

1

1bad92lx

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Sep 21, 2005

#9

• Sep 21, 2005

• #9

I never did get around to taking it to a dyno. I was going to until my little explosion......... I talked to Rick Anderson and we talked about it and what to expect and he said between 420-450rwhp based on the trap speed and weight of the car with me in it. It should have went 10.80-10.90 with traction. Best 60ft after the stage III tw's and the AED 850 was a 1.76 on an 11.32 run. Before the upgrades the car was around a 1.55 60ft. I will build a similar combo in the future but with a dart block and an all forged rotating assembly and I will definitely take that one to the dyno.