30# injectors
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Senior User
Joined: Jul 2007
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From: south jersey
30# injectors
Jus bought a used trickflow r series upper n lower intake for my 351 it came with 30 pound injectors.. My truck has a trickflow stage one cam and ported heads .. Equal length headers n single 3inch exhaust would that size injector be too much? Stock is 19
Elder User
Joined: Jun 2009
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From: Elk River, MN
I have 30's in my 302 mustang and use a lighting 80mm MAF. It was tuned with a chip on the dyno. I am no expert but my understanding is that the injectors have to match the MAF. If your truck is speed density and MAf controlled I have no idea. The guy who tuned my truck and is pretty well known for his tuning ability said that his just adjusted the duty cycle of the 30's down for my application as I could have easily used 24's. Along with your other trick flow parts sounds like you can use the 30's for sure. Did any that make sense?
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
No.. injectors should match what the computer is programmed for since it is the computer that holds all the calibration data for everything under the hood and makes fueling calculations based on those numbers and real-time feedback from the sensors. Larger injectors with a "calibrated" MAF is a hack that can work well at producing peak HP but it often fails miserably at everything else and will never produce anywhere near as good a running engine as a properly tuning computer.
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Then sounds like you are all set - GO FOR IT! I am going to use them on mine as well.
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From: south jersey
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FTE Legend
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From: Ottawa, Ontario
You don't need 30lb injectors until you get much better heads. You can use them with a tune but overall I think you're just throwing money away at this point, your motor hasn't exceeded the supply capacity of 19's yet.
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Senior User
Joined: Jul 2007
Posts: 248
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From: south jersey
Yea I understand.. The truck is getting retuned no matter what an since I have everything to run the 30's and everything to run the stock ones I was just wondering I the 30s would b ok... My gt 40 heads r ported
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