5.7 TBI build questions
10-04-2017 | 12:14 PM
#11
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From: Central IL
Correct. It is a 2bbl. GM throttle body/intake with two measly injectors. Definite choke point. The only difference between a 260 HP 5.7L EFI and the 300 HP 350 MAG in the late 90's was the intake and TBI vs. MPI setup. Heads, cam, and shortblock were identical.
10-04-2017 | 02:14 PM
#12
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From: Ft. Worth TX
Like I said out dated fuel delivery system. and at 220 hp this would NOT be a roller small block. They Merc 1997 had a carb version of this exact engine at 210 hp what a dog non Vortec non roller motor. Now if one would happen to have the 260 hp then that is a Vortec / roller small block.
Last edited by BUP; 10-04-2017 at 03:38 PM.
10-04-2017 | 02:25 PM
#13
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From: Ft. Worth TX
And I thought I would mention the tbi's were all 2 injectors for black side Merc even in late 2001
.http://www.marineengine.com/parts/me.../throttle-body
.http://www.marineengine.com/parts/me.../throttle-body
Last edited by BUP; 10-04-2017 at 03:45 PM.
10-04-2017 | 02:26 PM
#14
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From: Ft. Worth TX
Just in case one misses it in the parts listing the non rollers made 210 carb and tbi made 220 hp
MerCruiser 5.7L EFI (2 Barrel.-TBI) GM 350 V-8 1997 Cylinder Block & Camshaft (Flat Lifters) Parts
MerCruiser 5.7L EFI (2 Barrel.-TBI) GM 350 V-8 1997 Cylinder Block & Camshaft (Flat Lifters) Parts
Last edited by BUP; 10-04-2017 at 03:40 PM.
10-09-2017 | 10:22 PM
#15
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From: Spicewood, Texas USA
Volvo Penta marketed a 5.7 Votec TBI engine in the late 90's that was rated at 320 HP. It used an aluminum 4 bbl intake with an adapter for the 2bbl tbi. It was the exact same GM long block as Merc used.
