Hey guys so my engine currently has Accel 26lb injectors, they came with the car when I bought it so I installed them when I built the l98 and yes I know they are probably to much for my build but anyways its tuned by Brian Harris for that size injector and fuel pressure set properly with the BBK FPR engine is ported and cammed and yaddy yadda anyways I am wondering if replacing these questionable Accel Yellow injectors with a set of FIC LT4 custom flow matched rebuilt 26lb injectors would be a worth while investment, what benefits should I expect, the car runs well now definitly a bit rich but overall shes a beast. Thanks for your time.

 

Unless you suspect the injectors are not working correctly there is zero need to replace them with another set.

Injectors are injectors. The only concern should be if they are working correctly, and provide enough fuel for your needs.

After that its all calibration in the ECM to ensure the ECM knows the flow-rate of the injectors its using. it doesn't care who makes them.

 

Far more to injectors than that. ECM very much cares if the proper injectors are used. High Impedence vs Low Impedence is a big one. There are also other design aspects that will change how well or how poorly they work in a given setup.

 

I guess the main thing is if the current injectors are fine, sized properly for the engine, and the ECM is currently tuned for them, then it's probably not worth it. In fact, changing injectors can often require a re-calibration of the chip due to the various factors that Fast mentioned (even if you're replacing with the same advertised flow rate).

 

But not for your average Joe buying EV1 stock ECM compatible style injectors.

OP would have tons of issues if they were high impedance injectors.

Just about everything else, the flow-rate, the voltage offsets is something that can be tuned on most cars.

 

While we can fix them, the average person that buys a mail order prom chip does not have that ability.

Low Impedence would be the problem. TPI ECMs, LT1, Vortec, LS PCMs, etc are all High Impedence. Low Impedence were common in older stuff especially European made stuff. I have run across them in older port fuel injected big block Cadillac and PFI Oldsmobile 350s.

 

totally agree .

 

Was under the impression a set of properly freshly rebuild flow matched injectors would be a significant improvement over a set of questionable accel units that sat unused for 10 years with this car, yes I cleaned them ******* style with a booster pack and carb cleaner and they all did spray evenly when I reassembled this engine and yes Brian Harris did tune my chip for these injectors and their flow rate. I realize I may be stirring up some conflict here but I would like to know if I will benefit at all from a set of these Injectors over my accels I have read posts where people state they notice an improvement with a set of flow matched bosch style injectors or is this just over the stock multecs? Thanks.

 

I could see improvements Over eBay junk or multecs. Tuned is tuned just get close to same offsets and flow rating if datalog tuned.

 

My chip is what it is when I custom ordered it for my build, I am not tuning the car myself or able to view real time data unfortunately.