man i lucked out
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Joined: May 2003
Posts: 987
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From: Houston-katy
Car: 1986 Irocz- Houstons Fastest Street
Engine: 408 LS1 w/ 2 stage
Transmission: Turbo 350
Axle/Gears: 3:73,3850 lbs , best of 9.92 @ 138
man i lucked out
when i went to put my holley 58 on my car i was getting the bypass off the bottom of the 20 year old stock tb that had never been touched. i broke 4 of the bolts off and were left with 2 bolts, then when i tried to pry the crossover off it broke in half, but i was ably to salvage the vacuum part for the iac and seal it with two bolts and some silicone. damn i was lucky, 20 year old water crossovers are not fun
Joined: Jul 2004
Posts: 769
Likes: 51
From: Zebulon, nc
Car: 1990 GTA/1989 Iroc
Engine: L98/383
Transmission: 700r4/t56 magnum
Axle/Gears: 9"
same thing happened to me on saturday when i put my 52 on, only i broke 5 of the 7 bolts(good thing new ones came with it). Decided to beat water passage off with hammer....it broke. i was able to salvage the IAC part of it and ive had the coolant bypassed for the last 2 years.
Thread Starter
Senior Member
Joined: May 2003
Posts: 987
Likes: 0
From: Houston-katy
Car: 1986 Irocz- Houstons Fastest Street
Engine: 408 LS1 w/ 2 stage
Transmission: Turbo 350
Axle/Gears: 3:73,3850 lbs , best of 9.92 @ 138
i guess after years of heating and cooling and water running through them it takes a lot out of them
Joined: Jul 2004
Posts: 769
Likes: 51
From: Zebulon, nc
Car: 1990 GTA/1989 Iroc
Engine: L98/383
Transmission: 700r4/t56 magnum
Axle/Gears: 9"
yeh, used vice grips and the broken bolts came right out, go figure. by the way, did you notice any difference with the 58. i heard that they mess with the timing of the transmission shifts, making them shift too soon.
Thread Starter
Senior Member
Joined: May 2003
Posts: 987
Likes: 0
From: Houston-katy
Car: 1986 Irocz- Houstons Fastest Street
Engine: 408 LS1 w/ 2 stage
Transmission: Turbo 350
Axle/Gears: 3:73,3850 lbs , best of 9.92 @ 138
no it actually is running great, i had heard that i would have throttle boog, but in fact my throttle response has been better and my idle is perfect, shifts are great too
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HoosierinWA
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Oct 7, 2015 10:15 AM





