Speed Density questions

[1RangerNut]

How much change can they take without hurting performance?

Cuz I'm in the middle of doing intake gaskets but some of my injectors are a little noisy.

So I was thinking of doing 5.0 injectors, gasket match the upper and lower intake, intall the 87 TB I have laying around, install a free'r flowing muffler, and maybe bumping the timming to 12*, I'm either gonna leave the filter stock or maybe put a K&N in.

Will all that be to much for the Seed Denstiy system?


Thanks: Steve

 

[1RangerNut]

Bump.........

 

[1RangerNut]

Anyone........

 

[Psychopete]

Gasket matching, TB, exhaust, timing advance will work on a federal emission computer fine. What you run into is if you change out things that screw with vacuum, then you need to run a California emission system.

19lbs are too much in general. The 14lbs are adequate for supplying the amount of fuel that it needs for the amount of air that the engine is demanding. Leave them be at 14lbs.

 

[1RangerNut]

So should I just stick with the stock ones even though tick some?

And yea if 14lbs is stock 19 maybe alittle much there just the ones I heard to run.

 

[Psychopete]

So should I just stick with the stock ones even though tick some?

And yea if 14lbs is stock 19 maybe alittle much there just the ones I heard to run.

Up to you, can at least have them serviced or clean them and check ohms. Or pick out the worst with a stethoscope, replace with used, and clean those - they are common in a lot of other EFI vehicles. Or some online offer injectors that are flow matched and ready to go. Depends on how much you want to spend, and how reliable and how sure it's going to be right.

But bigger injectors really can't make anymore power. You make the best power when the air/fuel mixture is right and the fuel is atomized. Plus injectors work the best when a higher percentage of it's flow capacity is used, 19lbs run very rich at idle. 2.9L doesn't pull enough air to utilize the amount of fuel 19lbs injectors can provide for it, so really there is no reason to do this unless the engine is modified enough to need them.