Need some input on what how these mods will affect the engines gas mileage..
05-06-2012, 03:07 PM
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Need some input on what how these mods will affect the engines gas mileage.. I don't have a Camaro, but I'm looking to put a 350 vortec in my S10 Blazer and no one on any of the forums seems to be able to answer my question so I figured I'd come here. Current owner says that in his Blazer he was getting 24-26mpg with 4.10 gears and a T56.
Here's what I'm looking at:
I'd be keeping it fuel injected and tuned with a 411 computer. So I'm wondering if this engine would get terrible gas mileage or good (for a V8). I'd be wanting at least 20+
Or...... I have an idea what mpg it would get with a stock 350 vortec, could you tell me how all the custom stuff with the tune will affect the mpg?
Here's what I'm looking at:
350 vortec, bored .030 over and was taken down to a zero deck. With the head gasket im running it should be right at 9.8:1 compression ratio. It has an Lt4 hot cam, comp cams 1.6 ratio full roller rockers, Comp cams beehive springs and retainers....Black Bear Performance custom tuned PCM
Or...... I have an idea what mpg it would get with a stock 350 vortec, could you tell me how all the custom stuff with the tune will affect the mpg?
Last edited by ZQ8 Blazer; 05-06-2012 at 03:13 PM.
05-06-2012, 05:59 PM
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Im doin a stockish LT1 build with a 4L60E in my S10 ext cab Itll have dana 44s front & rear on 35x12.50s with 4.10 posi front & rear It should get 24 or 25mpg hwy Youve gotta figure for awhile youll be rompin on it lol since you just added a lot more power 
If your usin a 4.3 trans it might need some Upgrades
If your usin a 4.3 trans it might need some Upgrades 