1991 Z28
05-02-2011, 10:02 PM
#103
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Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
05-02-2011, 10:54 PM
#105
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Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: 1991 Z28
excuse the messy wires and stickers, they're gone now
05-03-2011, 05:19 PM
#108
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Car: Too many cars
Re: 1991 Z28
Bought this TPI intake this weekend. I believe its a TPIS ported throttle body (or appears to be), adjustable fpr, new rails, egr block-off plate, and stainless Allen head hardware on a probably stock TPI system. He SAYS it has a ported plenum and runners. We'll see I guess.... Either way, the price was right and it was all like brand new. I'll probably just buy some injectors now and put this manifold on the motor?... Decision decisions!
05-03-2011, 06:15 PM
#109
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Re: 1991 Z28
Couldn't tell ya....
Is an airfoil really worth buying? I dont buy into them really making more power. Seems right up there witha "Tornado" fuel saver to me... Need dyno proven graphs!
Is an airfoil really worth buying? I dont buy into them really making more power. Seems right up there witha "Tornado" fuel saver to me... Need dyno proven graphs!
05-03-2011, 08:17 PM
#110
05-03-2011, 09:41 PM
#111
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Car: 1989 Iroc-Z Hardtop
Engine: L98
Axle/Gears: 9 Bolt 2.73 Posi
Re: 1991 Z28
That year Z is one of the baddest of all time... it is the EXACT Car I will buy if I can find one... that or a GTA.
05-05-2011, 01:51 PM
#113
Re: 1991 Z28
Don't know about performance gains but for the money, why not? It smooths out the air coming in toward the TB. After adding one to my CAI I had on my GTA years ago, the sound of the CAI got louder. I would assume that's because there was less turbulent air.
05-05-2011, 02:16 PM
#114
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Car: 91 Trans Am 'vert
Engine: LB9
Transmission: T5
Axle/Gears: 3.45 9 bolt
Re: 1991 Z28
Nice daily driver! Just make sure she remembers who came first 
Last edited by musclecar70sfan; 05-05-2011 at 02:22 PM.
06-09-2011, 05:24 PM
#118
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Re: 1991 Z28
So, the fuel pressure regulator showed up yesterday, and I got it set @ 50 PSI like I was told to.
Turns out I didnt set it correctly, and will have to redo it with the vacuum line off of the pressure regulator. I was also told by tech support now to set it at 45psi @ Idle... We'll see what that does! Thus far it seems like the problem has gotten better, but is still very clearly misfiring....
Turns out I didnt set it correctly, and will have to redo it with the vacuum line off of the pressure regulator. I was also told by tech support now to set it at 45psi @ Idle... We'll see what that does! Thus far it seems like the problem has gotten better, but is still very clearly misfiring....
06-11-2011, 10:35 AM
#119
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Re: 1991 Z28
New Fuel filter installed, and pressure was set to 45psi @ idle with the vacuum line disconnected as directed. The car still misses pretty bad, but is no longer backfiring.
I developed a new issue with posing my gauge cluster fuses. The previous owner made a cute rats nest under the dash for me to lose sleep over... So, I'll look into that mess whenever I get to it.
I just want to enjoy the car for once! Considering selling it and starting a new venture...
I developed a new issue with posing my gauge cluster fuses. The previous owner made a cute rats nest under the dash for me to lose sleep over... So, I'll look into that mess whenever I get to it.
I just want to enjoy the car for once! Considering selling it and starting a new venture...
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