Injector size HELP!

NOSLO5.0 · January 14th, 2008, 07:24 AM

I have a 347 stroker, 185 AFR heads, reconfigured GT-40 intake, X-303 cam, 75MM throttle body, 90MM MAS. Right now I have a set of 30LB injectors.
Before I dyno this up & run it for first time, Would it be a good idea to run a slightly bigger injector to start with so I don't run the risk of "pegging" the 30 pounders!

JBIGBOOTSY · January 14th, 2008, 07:56 AM

the 30s should be fine.

sneezingfox · January 14th, 2008, 08:28 AM

Good to go. Get that beast on the dyno and see what she does!

Speedstang302 · January 14th, 2008, 09:55 AM

yep 30lbers are perfect...36lbers wouldnt hurt you to much but i'd stick w/ the 30s

Goblin · January 14th, 2008, 11:20 AM

I doubt you'll "peg" the 30lb'ers. Their good for 400+hp.

problemCOBRA94 · January 18th, 2008, 12:47 AM

what is your horsepower goal? over 400 and I would say step up to 36 if you are NA.
Does that gt-40 intake feed air to those heads and the 347?

nolife · January 18th, 2008, 09:52 AM

Originally Posted by problemCOBRA94

what is your horsepower goal? over 400 and I would say step up to 36 if you are NA.
Does that gt-40 intake feed air to those heads and the 347?

Not sure about the heads but MM&FF did an intake comparisons with 347. A ported and polished GT40 was in the mix. The peak HP and torque was lower than the other intakes but the average across the range was close. This was a magazine article, your results may be different.

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January 14th, 2008, 07:24 AM	#1
NOSLO5.0 Newbie 1995 vert. x-mod na Join Date: Dec 2007 Location: New york-out there Posts: 15 iTrader: 0 reviews	Injector size HELP! I have a 347 stroker, 185 AFR heads, reconfigured GT-40 intake, X-303 cam, 75MM throttle body, 90MM MAS. Right now I have a set of 30LB injectors. Before I dyno this up & run it for first time, Would it be a good idea to run a slightly bigger injector to start with so I don't run the risk of "pegging" the 30 pounders! __________________ JASON ERIC BRESMON 1979-2004 TILL WE RIDE AGAIN A candle that burns twice as bright - lasts half as long

January 14th, 2008, 07:56 AM	#2
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,391 iTrader: 0 reviews	the 30s should be fine. __________________ Bolt-on Abraham Lincoln Log motor. With extra wiring.

January 14th, 2008, 09:55 AM	#4
Speedstang302 I Post Entirely Way Too Much 1996 Mustang GT 13.64@101mph Join Date: Apr 2007 Location: Massachusetss Posts: 5,828 iTrader: 1 reviews	yep 30lbers are perfect...36lbers wouldnt hurt you to much but i'd stick w/ the 30s __________________ 1990 GT- GT40p Heads\| Anderson N41 cam\| Crane 1.6 RR's\| Trickflow Intake\|MGW Short Throw\| Aluminum d/s\| 3.73's.....still slow....

January 14th, 2008, 11:20 AM	#5
Goblin Hardcore Enthusiast 88mm Join Date: Apr 2007 Location: Tucson, AZ Posts: 2,111 iTrader: 0 reviews	I doubt you'll "peg" the 30lb'ers. Their good for 400+hp. __________________

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January 14th, 2008, 08:28 AM	#3
sneezingfox Regular Join Date: Nov 2007 Location: Murfreesboro, TN Posts: 294 iTrader: 0 reviews	Good to go. Get that beast on the dyno and see what she does!

January 18th, 2008, 12:47 AM	#6
problemCOBRA94 Regular 1994 Mustang Cobra it runs now. Kinda... Join Date: Mar 2007 Location: Rocklin, ca Posts: 72 iTrader: 0 reviews	what is your horsepower goal? over 400 and I would say step up to 36 if you are NA. Does that gt-40 intake feed air to those heads and the 347?

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