mikobu3

what is the best 1 out there for the 1986 305 tpi thanks

is hypertech any good?

irocing

I think that the best afpr by experience and by word of mouth is going to be a TPIS afpr, i had one on my 87 IROC and it worked good, but then my buddy has a Holley on his 88 IROC and he very pleased with the way that it worked. But i think that the best bet is go with the TPIS. Best of luck!!!

CaptPicardsZ28

Holley is the only one I know of that makes an AFPR that uses a dial to make adjustments. The rest use a bolt sticking out of the top of the AFPR which for most makes it harder to adjust because its either too close to or it hits the plenum.

stuart

go with the holley......no more wrenches........

dj haf

i went with the holley, and im glad i did

mikobu3

thanks guys i will go with the holly

anyone got the part number for it

thanks again guys

Slow89Iroc-Z

All AFPR are worthless......get into chip burning and you'll see why....

Andy 91GTA

iTrader: (2)

The part # is 512-501.

CaptPicardsZ28

It wouldnt hurt to tell us why would it? Do you have AFPR on your HSR?

Slow89Iroc-Z

no AFPR on the stealth ram....all fuel tuning is done in the PROM.

cmeyer

It's true that you can increase the amount of fuel being delivered by the fuel injector through programming, but at some point you'll be pulsing the injectors at more than 85% duty cycle, which is the upper limit of the fuel injector. Any duty cycle higher than this will drastically reduce the life of the injector. By installing a fuel pressure regulator you are effectively increasing the flow rate of the injector and can deliver more fuel per pulse width.

Hope that made sense.

Chris