TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Aug 27, 2001 | 02:06 PM
  #1  
90Form350's Avatar
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From: CT, USA
TB Bypass

I wasn't sure where to put this (maybe TPI?), but I just wanted to ask if anyone noticed a difference with this mod?

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1990 Pontiac Formula 350
Rebuilt 355
COMPCAMS 212/212 .440/.440 cam
Flowmasters 80 series.
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Old Aug 27, 2001 | 02:56 PM
  #2  
onebad82z's Avatar
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From: Orange County,NY
Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
I noticed a small difference on my 86 T/A only on real hot days.Car didnt seem to get as sluggish as usual.It wont be a huge difference but for the effort to do it,i recommend it.
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Old Aug 27, 2001 | 03:50 PM
  #3  
Chuck Everly's Avatar
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I think the TPI board is a better place for this so I am moving it there.

Chuck
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Old Aug 27, 2001 | 04:13 PM
  #4  
88TAJeff's Avatar
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Joined: Aug 2001
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From: Sidney, B.C., Canada
Car: 88 T/A
Engine: 305
Transmission: 700R4
I didn't notice much of a diff, although it sure helps on hot days when doing adjustments, etc, not to burn your arms & hands on the plenum.
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Old Aug 28, 2001 | 01:00 AM
  #5  
Iroc n roll's Avatar
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Joined: Jul 2001
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From: Hard hittin' New Britain, CT USA
I have to say I didn't notice a damn bit of difference. But then again I didn't really expect much. It's just one of those mods that you can do yourself just to feel good. I'm sure you gain a bit, not more than a horse or two though.

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"Though I cruise through the valley of Rice I shall fear no turbo, for torque art with me."
--Cullan Hooley
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1985 IROC-Z w/T-tops, 305 out and 350 L98 TPI engine in, Hooker Super Comp Headers, 3" Hooker Super Comp Cat-Back, Dropped Cat, Rebuilt TH700R4 with Shift kit, 2,800RPM Torque Converter, 3.73 Richmond gears, Auburn differential, Accell SuperCoil, Accell 8mm racing wires, BBK AFPR, Homemade Ram-Air (thanks to askulte), MAF screens removed, Dropped A/C, Dropped A.I.R, TB coolant bypass, Hurst Dual-Gate Shifter, SLP Air Foil, K&N filters, Holley performance fuel pump, Spohn Subframe Connectors, Re-located Spohn Lower Control arms, and more to come.
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