LUVTruck.com

so i was tearing down my old motor that threw a rod and just realised that my block is a g180 but my head was g200 is this for performance? Beacause i know that the g200 block with a 180 head for performance but not what i had just curious let me know if you know. thanks David

http://forums.luvtruck.com/viewtopic.ph ... light=g200

That is the G180 performance sticky, I think any questions you have on it can be helped out in there, err, its a start at least

-Austin

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1975 Chevy LUV Rockabilly Stepside:
Satin Black, V-8 Traditionally Named "Dean"

i looked at theres nothing with a g180 block and g200 head. but theres a g200 block and g180 head.

Well by any stretch of the imagination, or a good guess haha, I would say that the G200 combustion chamber is larger, so better flow for the G180. . . I am sure another one of these gent's will jump in to prove me right or wrong . . .

-Austin

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1975 Chevy LUV Rockabilly Stepside:
Satin Black, V-8 Traditionally Named "Dean"

Simple mathematics a larger combustion chamber means more cc's =lower compression. The air flow wont do you squat with a stock motor with lower comp.You need to either find a g180 head or pistons to get youd comp. back to a min. of stock and a little more would help as comp. helps make torq. and effientcy.

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1978 pro street step/side 455Buick, 4sp,4.11s, 31/18.5s

hmmmm but would it work if he were to turbo the motor?? lower comp would let you run higher boost= more power, but then you'd have to make the bottom end stronger to handle the extra strain of a turbo

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'80 Luv 4x4, 3" BL, 1.5" SL, 32/36, 2.25" exhaust...and fuzzy dice.
'95 Toyota 4Runner Limited 5-Speed.

Running boost would be the only good reason for a G200 head on a G180, well other than it was what was available and it kept a good truck out of the scrap heap.

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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)

MEPR: Man, my 4x4 makes all other LUVs look good

Running a turbo on that set up would work real good and as for the bottom end new bearings and oil pump would work as long as you use some common sense and remember it is not a full on racer every time you start it up.

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1978 pro street step/side 455Buick, 4sp,4.11s, 31/18.5s