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It is currently Tue Jul 01, 2025 3:56 pm
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[ 6 posts ] |
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Bootzz
MMT Pro Member
Joined: Tue Jan 13, 2009 6:12 pm Posts: 499 Location: DA BACK OF DA BACK,Louisiana
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 Motor compatability???
wondering if i can put an 88' 5.7 350 in a 1998 chevy 1500 that has the vortec (without changin my electronics) or would i have to change my ignition?? just wondering the 98' has the vortec motor in it
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Sat Aug 01, 2009 10:45 pm |
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backwaterballer
MMT Addict
Joined: Sat Feb 21, 2009 9:39 pm Posts: 715 Location: Pearland Tx
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 Re: Motor compatability???
The vortec heads are different so I do think the intake will match up on the old motor.
_________________ 23 hp gdlt pushin the 14ft NoWeld "aka" the black pearl 35 hp gdsd pushin a 16/60 go devil boat
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Sun Aug 02, 2009 12:08 am |
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DeathMetalDukk
MMT 1000 Club
Joined: Sat Jun 27, 2009 11:50 pm Posts: 3777 Location: Knotts Island, North Carolina.
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 Re: Motor compatability???
The '88 is throttle body injected, the '98 is port injected, completely different intake and electronics. The '88 has a simpler intake, I just replaced the intakes (yes there are 2, an aluminum lower and a plastic upper intake) on my '97 Sierra and it cost me a grand just for the intakes, me and my buddy did the work. The vortecs need 20 more psi of fuel pressure than the old throttle body motor does, so your fuel pump might need changing. I wish it could be done, cause I have 2 suped up 5.7's from dirt cars chillin' in the back yard, and my '97 vortec has 245k miles on it.
_________________ Put yer face in the myrtles.
35 GTR chasing a 1650 Polarkrap.
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Sun Aug 02, 2009 8:38 am |
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Bootzz
MMT Pro Member
Joined: Tue Jan 13, 2009 6:12 pm Posts: 499 Location: DA BACK OF DA BACK,Louisiana
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 Re: Motor compatability???
dam owell looks like ima just buy parts to un freeze that motor in the truck
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Sun Aug 02, 2009 9:56 am |
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Mitschke
MMT F.E.
Joined: Tue Jan 13, 2009 7:18 pm Posts: 971
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 Re: Motor compatability???
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Sun Aug 02, 2009 10:15 am |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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 Re: Motor compatability???
Bootz, just look for a used Vortec 5.7 in junk yards. Hell try to find a good longblock and swap your intanke, valve covers, exhaust manifolds, oil pan, and acessories.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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Mon Aug 03, 2009 8:49 am |
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