LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Fueling questions... do I need a Adj. fpr?

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Old 03-09-2011, 10:32 PM
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Default Fueling questions... do I need a Adj. fpr?

Hey guys, I will get straight to it

I am running 30lbs/hour Bosch V3 Injectors and still have a duty cycles up to 89!

the V3's will handle much higher pressure so instead of investion more $$ on injectors I was thinking of running a adj. fpr. and being a broke collage student I was looking into the "ebay speacial" $30 plus a bit more in the custom lines

as a plus I think it would make tuning a bit easyer..as I could do some corse tuning with the FPR and then fine tune with tunercats.

I am new to the LT1 so bare with me here as I learn



'95 m6 Camaro with ported and polished (LE2 knock offs) heads, long tubes, cat del & magaflow. and alot of other bolt ons.

tuning with Tunercats and Datamasters

Last edited by Ictinik; 03-09-2011 at 10:38 PM.
Old 03-09-2011, 10:36 PM
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I see no reason to mess with FP in an N/A car.
Old 03-09-2011, 11:08 PM
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sounds like there's something wrong, I'm not hitting near 80% on my 30# svos
Old 03-10-2011, 07:52 AM
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It does sound like something is a miss then, I changed to the 30# injectors because I was getting IDC of 109 with the stock, I see you are running a 383, and There is now way I should be using that much fuel. I do get descent millage..think Datamasters could be wrong on the calculation?

The car does not feel like it has any issues nor does it seem to run rich, It does puff some black smoke in open loop mode but not much

any ideas on what could be wrong?

the only issue I have is a high idle(1200 rpm) I have checked for leaks and found none. It seems that my IAC is working
Old 03-10-2011, 10:03 AM
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if the car is idling high and injector DC is high I would look for a vacuum leak or bad fpr first.
Old 03-15-2011, 06:11 PM
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found the issue, The car already had a ADJ FPR, and it was set at 23lbs...lol I bumped it up to stock and did a quick retune and everything is great now



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