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GTA TECH Want to discuss technical topics about your GTA.... engine tuning, mechanical upgrades, problem areas, etc.? Then post it HERE!

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Old 03-04-2010   #41
BigBadGTA
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GTA Year: 1988
GTA Engine: 350 TPI Automatic
Re: Seafoam and a L98 VS LS1 story.

Is this a known issue with the bypass mod? If so I will put it back asap. How long has yours been bypassed bud?
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Old 03-04-2010   #42
FearThisGTA
"The only thing to fear is.............fear itself"
 
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: Seafoam and a L98 VS LS1 story.

Not that I am aware of. Of course, there are always dangers to be aware of when working on or around any car. I have had the bypass on my car for so many years that I cannot even tell you when I did it, but when I did it, I did notice a crisper throttle response, especially in the am. hth
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1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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Old 03-04-2010   #43
budfreak1
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: Seafoam and a L98 VS LS1 story.

Quote:
Originally Posted by BigBadGTA View Post
Is this a known issue with the bypass mod? If so I will put it back asap. How long has yours been bypassed bud?
My 87 GTA had it's coolant bypassed for almost the entire time I owned it(4 years) and the same goes for my Subaru SVX(over 5 years). I've even driven in temps under 0 in both cars with no TB freezing issues. I haven't driven my 91 with it bypassed yet but it will never see temps under 50 because it doesn't go out in winter, so it won't even be a concern.
The only purpose of that coolant line is to assure the throttle plates do not freeze open when temps are cold outside.
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Old 04-02-2010   #44
Andy 91GTA
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Re: Seafoam and a L98 VS LS1 story.

Quote:
Originally Posted by BigBadGTA View Post
Is this a known issue with the bypass mod? If so I will put it back asap. How long has yours been bypassed bud?
My 92 GTA had a damaged heater valve that I found out about after I bought it and didn't even have the TB bypass mod. They are poorly made and can break.
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91GTA
305|auto
Bright Red w/black cloth
SLP catback|air foil|CAI|ported plenum|180* T-stat|Holley APFR|TransGo Stage 1 Shift Kit|Corvette Servo|.5" Boost Valve|Kenny Brown SFCs|TDS Wonderbar|Strange 3.42s|ASP crank pulley|ET Street Radials
15.03@91
92GTA
350|auto
Green w/beige leather
14.18@95
CAI|TPIS air foil|180* T-stat|ported plenum|AS&M intake runners|SuperRam intake manifold|Holley APFR|ASP crank pulley|TDS Wonderbar|ET Street Radials
92GTA
350|auto
Jamaica Yellow w/black cloth
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