fuel/rear diff questions

[uraverageyota]

ok as i stated in earlier posts doing a turbo install on my 85 gt-s. any ideas on injector and fuel pump sizes needed? and second question.....i would like to up grade the rear diff to 3.909 ring gear and pinion, anyone know if the rest of the rear bearings and lsd will work w/that upgrade?

[CRASHDRIVE]

Originally Posted by uraverageyota

ok as i stated in earlier posts doing a turbo install on my 85 gt-s. any ideas on injector and fuel pump sizes needed? and second question.....i would like to up grade the rear diff to 3.909 ring gear and pinion, anyone know if the rest of the rear bearings and lsd will work w/that upgrade?

bluetop injectors are 182cc not that big but its good up to 190hp, if you want you can use a 16V redtop 235cc thats good around to 230hp but I've seen people make 4ag(t)e with that injectors that made 240+whp and a turbo silvertop 20V that has a stock 295cc injectors that made 300hp. But for sure a 4agze's 365cc is more then enough for your bluetop turbo.

fuel pump is ok on a bluetop what you should worry more is the adjustable fuel regulator, on my 4agze I'm using a MSD extrenal fuelpump but the red AE86 I'm using a Nissan Japanese silvia S14 fuel pump and adjustable fuel regulator.

wow a 3.9 final gear thats a very long final gear, I seen them in club4ag but rarely, I my self only have 4.1. bearings are all same just make sure check the bearings before you put it together, unless your changing to a aftermarket lsd make sure you get the right lsd or you'll wont fit your axles.

[uraverageyota]

thanks so much for getting back to me about the injector question. yeah i know the 3.9 final gear is an odd-ball, but just w/ the turbo was worried that i'd be smoking the tires so much and shifting a lot. even though now that poor car could use a 6th gear. gonna rebuild the lsd thats in the car now since it will be out. i know this project will be costly.....but the wife got a sienna and now she's happy.

[uraverageyota]

so thats totally awesome, i can run my stock injectors and fuel pump thats on my blue-top currently....just look for an adjustable fuel pressure regulator.

[CRASHDRIVE]

Originally Posted by uraverageyota

so thats totally awesome, i can run my stock injectors and fuel pump thats on my blue-top currently....just look for an adjustable fuel pressure regulator.

just an advice rebuild the motor first with a better head metal gasket maybe a HKS 1.6mm that can make a big difference, lowers down the compression safe for detonation.