to do thisi want but dont know how hard to do. i know u have to take off the plenum. i was told to set it at 50 psi? is this thing gonna be worth the money? what are the torque numbers on the plenum to put it back on?

 

Not too hard. But I'd rather set it somewhat lower to start with, lets say 45-46, setting it too high will do nothing more than running too rich, and premature killing of your fuel pump.

Don't know the torque specs on the plenum bolts, but don't overdo it, since the plenum is aluminium!

You will definitively notice more torque from installing an AFPR, I did notice it after installing one in my IROC...

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ZaphodB a.k.a Carl Andersson - zaphodb@faxancruisers.org
'89 Camaro IROC-Z 5.7L TPI - Mods under construction :-)
Custom ARAP Chip Under Development/180 t-stat, Edelbrock TES Headers,
SLP Airfoil, K&N Filters, Accel 8mm wires, Relocated MAT, AFPR @ 45 PSI

 

Installing one is really easy to do. I did mine in about a hour or so. You will need to remove the plenum and everything attached to it. You can leave the TB attached that is no big deal. You will have to disconnect the cables attached to it though. The MAT will need to be disconnected along with a few vaccum hoses as well. You will need a T10 with a hole punched in the middle of it for the FPR bolts. You will not see them with the naked eye from a distance but they are there. You will also need to relieve the fuel pressure from the schrader valve. That is all I can really remember off hand maybe if I didi someone will help out. Good luck.

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"I'm not dumb, I just have an amazing command of thoroughly useless
information."
Bill Waterson creator of Calvin & Hobbes.

 

Agreed..... start out at about 45 and give it some plus and minus.

Here are some <A HREF="http://www.gmtips.com/3rd-degree/dox/tips/specs/torque.htm">Torque Specs</A> for you.




[This message has been edited by MikeInAZ (edited July 25, 2001).]

 

Chilton manual doesn't list torque for plenum bolts. Hanynes manual only says "tighten securely".

I also loosened lower bolts on the runners to help free them from the plenum. (gaskets were really stuck.) Don't hammer on or pry against the runners. They dent very easily. I dented one slightly, pushed it out from the inside, and brushed the finish with one of those green scouring pads. Looks perfect again.

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87 Formula 305TPI T5

 

Just use a rubber mallet and something inbetween to soften the blow.

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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System