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403 th350 gas mileage? LOL

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Old 12-30-2015, 08:23 AM
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Default 403 th350 gas mileage? LOL

Just trying to get a gauge on where my mpg would be. 403 th350 3.73 gears 3500 stall cam is 235/243 624/624 113+3 car made 590hp 530tq at the flywheel. I'm aware gas mileage won't be great and this setup obviously wasn't built for mpg. Just looking to get an estimate. Thanks guys!
Old 12-30-2015, 09:24 AM
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Nobody?!
Old 12-30-2015, 11:46 AM
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Not quite the same but my built 403 with 2004r and 373 out back get me 13 on the highway...and I'm only making about 420 hp.
Old 12-30-2015, 11:54 AM
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Originally Posted by tribute
Not quite the same but my built 403 with 2004r and 373 out back get me 13 on the highway...and I'm only making about 420 hp.
Oh wow... Is that an LS motor too? The 2004r has overdrive too. According to what you get I might be getting under 10
Old 01-02-2016, 02:38 PM
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Anyone else?
Old 01-02-2016, 03:55 PM
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What car? Obviously a corvette will have vastly different results than a truck.

However, I don't see you getting anymore than low teens on the highway, 6-7 in town at best.

Even in a light car, on the highway you'll be guzzling gas while cruising at 3500rpm and in town a big cube, cammed and stalled car just completely kills MPGs.
Old 01-02-2016, 05:16 PM
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Originally Posted by redtan
What car? Obviously a corvette will have vastly different results than a truck.

However, I don't see you getting anymore than low teens on the highway, 6-7 in town at best.

Even in a light car, on the highway you'll be guzzling gas while cruising at 3500rpm and in town a big cube, cammed and stalled car just completely kills MPGs.

Wow, really? I was told I would see 17-19 mpg if I didn't pound the gas too hard all the time. The car is an 86 cutlass
Old 01-02-2016, 05:25 PM
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Can you not drive it to check it yet ?
Old 01-02-2016, 05:26 PM
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Originally Posted by madmike9396
Can you not drive it to check it yet ?
Yes, I haven't been able to drive it yet to find out. Just was wondering so I figured I'd ask tech
Old 01-02-2016, 07:33 PM
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Idk I'd imagine it will be pretty rough
Old 01-04-2016, 09:10 AM
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Originally Posted by madmike9396
Idk I'd imagine it will be pretty rough
Well that sucks, at least it'll be fast.



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