L98 Replacement
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Engine: L98 5.7L TPI
Transmission: 700R4
L98 Replacement
hi guys im new to owning a third gen firebird i have been searching for a replacement engine for my car which is a 1987 formula 350 the engine that is inside is badly warped and no shop will rebuild it
does anyone know of good crate engine for around 2-3k that will bolt right in?
i found a site that sells 350s for 1500 but after reading some threads here some warn that i would instead get a truck motor with different cam and heads...
http://www.carmonkeys.com/1987-PONTI...Years-Warranty
does anyone know of good crate engine for around 2-3k that will bolt right in?
i found a site that sells 350s for 1500 but after reading some threads here some warn that i would instead get a truck motor with different cam and heads...
http://www.carmonkeys.com/1987-PONTI...Years-Warranty
#4
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Car: 87 Iroc
Engine: modified 350
Transmission: high performance built 700R4
Axle/Gears: Strange S60 3:73
Re: L98 Replacement
You can get a brand new ZZ3 crate motor with a three year warranty from GM for $3000.It's basically a higher performance L98.
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: L98 Replacement
hi guys im new to owning a third gen firebird i have been searching for a replacement engine for my car which is a 1987 formula 350 the engine that is inside is badly warped and no shop will rebuild it
does anyone know of good crate engine for around 2-3k that will bolt right in?
i found a site that sells 350s for 1500 but after reading some threads here some warn that i would instead get a truck motor with different cam and heads...
http://www.carmonkeys.com/1987-PONTI...Years-Warranty
does anyone know of good crate engine for around 2-3k that will bolt right in?
i found a site that sells 350s for 1500 but after reading some threads here some warn that i would instead get a truck motor with different cam and heads...
http://www.carmonkeys.com/1987-PONTI...Years-Warranty
These guys rebuilt my L98. I have a year and 6k miles, no problem.
2y24k mi warranty.
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Car: 1989 Pontiac Trans Am GTA
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3:23
Re: L98 Replacement
Thx guys for the info my engine was not able to be rebuilt
I ordered one from napa im hoping i dont get a truck engine i specified the engine specs and they searched for an engine using my vin
I ordered one from napa im hoping i dont get a truck engine i specified the engine specs and they searched for an engine using my vin
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: L98 Replacement
Let us know how it goes.
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Engine: L98 5.7L TPI
Transmission: 700R4
Re: L98 Replacement
I already changed the fuel filter and it still doing the same thing.
Im thinking of replacing the
Fuel regulator and diagramph
Fuel injectors
And possibly the fuel pump
Can anyone guide me or name the tools i need to replace the
Fuel regulator and diagramph.
I have the 92 cpu but it has vats so im using the 87 im thinking that can be the problem to the starting
Last edited by FORMULA35087; 07-02-2016 at 09:51 PM.
#9
Re: L98 Replacement
I've got a running L98 out of a 88 Camaro I would take $200 for. If anyone around North Florida is interested. We went back with a create L31 motor in our build so we don't have any use for the old L98.
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Engine: L98 5.7L TPI
Transmission: 700R4
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Engine: L98 5.7L TPI
Transmission: 700R4
#14
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Re: L98 Replacement
I hope you didn't order a long block from them. The cam and heads they come with are junk. I did the same years ago, gave them my VIN too. The heads and cams that come in these replacement engines do NOT match L98's and it confuses the hell out of the ECM. The cams are often the baby cams found in TBI 350 and later B-body LT1s. 191/202 duration and a tight LSA.
I'd rip your own heads off, have them redone, and either run your old cam if its in good condition, or select a new very mild cam that matches the L98 specs closely.
I went there, the car will not run right with that small of a cam, and combined with the slight differences in heads it won't pass emissions.
Just get a short-block and have it rebuilt, or buy a short-block that has the right piston reliefs (L98s are pretty much flat tops with valve reliefs. I think about -5cc max) Most GM 350's used the same relief piston.
I'd rip your own heads off, have them redone, and either run your old cam if its in good condition, or select a new very mild cam that matches the L98 specs closely.
I went there, the car will not run right with that small of a cam, and combined with the slight differences in heads it won't pass emissions.
Just get a short-block and have it rebuilt, or buy a short-block that has the right piston reliefs (L98s are pretty much flat tops with valve reliefs. I think about -5cc max) Most GM 350's used the same relief piston.
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Engine: L98 5.7L TPI
Transmission: 700R4
Re: L98 Replacement
I hope you didn't order a long block from them. The cam and heads they come with are junk. I did the same years ago, gave them my VIN too. The heads and cams that come in these replacement engines do NOT match L98's and it confuses the hell out of the ECM. The cams are often the baby cams found in TBI 350 and later B-body LT1s. 191/202 duration and a tight LSA.
I'd rip your own heads off, have them redone, and either run your old cam if its in good condition, or select a new very mild cam that matches the L98 specs closely.
I went there, the car will not run right with that small of a cam, and combined with the slight differences in heads it won't pass emissions.
Just get a short-block and have it rebuilt, or buy a short-block that has the right piston reliefs (L98s are pretty much flat tops with valve reliefs. I think about -5cc max) Most GM 350's used the same relief piston.
I'd rip your own heads off, have them redone, and either run your old cam if its in good condition, or select a new very mild cam that matches the L98 specs closely.
I went there, the car will not run right with that small of a cam, and combined with the slight differences in heads it won't pass emissions.
Just get a short-block and have it rebuilt, or buy a short-block that has the right piston reliefs (L98s are pretty much flat tops with valve reliefs. I think about -5cc max) Most GM 350's used the same relief piston.
I installed the rebuilt on the formula 350
The GTA runs good but has no power it doesnt feel like it use to run i step wot but feels as if the power is not their im starting to think it does have a different cam and heads
I will be able to tell how much of a difference when i get the cold start injection or fuel problem solved on the formula
#16
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Re: L98 Replacement
I went ahead and installed a 350 (replacement motor) using the vin on a gta i had sitting down 3 days ago it makes sense now
I installed the rebuilt on the formula 350
The GTA runs good but has no power it doesnt feel like it use to run i step wot but feels as if the power is not their im starting to think it does have a different cam and heads
I will be able to tell how much of a difference when i get the cold start injection or fuel problem solved on the formula
I installed the rebuilt on the formula 350
The GTA runs good but has no power it doesnt feel like it use to run i step wot but feels as if the power is not their im starting to think it does have a different cam and heads
I will be able to tell how much of a difference when i get the cold start injection or fuel problem solved on the formula
But I'm willing to bet you have a Baby-cam in there now thats is less duration than the ECM is programmed for. And it likely has 193 Swirl Port heads which are junk.
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