231 Carbed V6

[49-blues]

I have a set of headers and dual true catback system almost new for the NA 231 that i had on my 86 cutlass, i had a 204/204 KB cam, 7000rpm hi rev lifters,#1 single plane manifold, with a electronic carb off a 307-recalibrated-and i had it up to 200 hp and about 25 mpg-i got more power and better mileage from mine before converting everything over to a turbo set up. The header back complete exhaust system is for sale. very negotiable.

 

[acole86]

Shoot 49 that is pretty good fuel mileage. What kind of off the line torque did you have with the single plane intake? I went dual plane as they are supposed to have more off the line.

 

[49-blues]

By using the electronic 4 barrel it even passed emissions with flying colors and sounded like a big block chevy at idle-acceleration in the rpm range was very quick-instant. great combo just wanted more power-nothing as good as a turbo motor.

 

[Freddie's Buick]

<TABLE id=HB_Mail_Container height="100%" cellSpacing=0 cellPadding=0 width="100%" border=0 UNSELECTABLE="on"><TBODY><TR height="100%" UNSELECTABLE="on" width="100%"><TD id=HB_Focus_Element vAlign=top width="100%" background="" height=250 UNSELECTABLE="off"></TD></TR><TR UNSELECTABLE="on" hb_tag="1"><TD style="FONT-SIZE: 1pt" height=1 UNSELECTABLE="on">
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<TABLE id=HB_Mail_Container height="100%" cellSpacing=0 cellPadding=0 width="100%" border=0 UNSELECTABLE="on"><TBODY><TR height="100%" UNSELECTABLE="on" width="100%"><TD id=HB_Focus_Element vAlign=top width="100%" background="" height=250 UNSELECTABLE="off">Those numbers seem inflated. Are those Dyno figures? Or off the top?
I used Desktop Dyno with my mods and got about 175 HP with a duel plane. Less with the OEM 4.1 single plane. Same mods or close.

MPG 18-20. Right now with the duel I'm getting 17-18 max. These are calculated the old fashion trip odometer reading divided by gallons used.
I've been using this method for 5 years and I get the same mpg readings consistantly.

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Shoot 49 that is pretty good fuel mileage. What kind of off the line torque did you have with the single plane intake? I went dual plane as they are supposed to have more off the line.

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[49-blues]

Those numbers are real world numbers about the same as a stock gn on the highway-mileage divided by the amount of gallons used-this is on a true dual catback system with headers and two cats and duals all the way back-( i paid about $1000. for the headers and dual catback system with custom pipes)-the horsepower was done on a dyno at e-town-alittle over 200.hp

 

[Brad Zeidler]

Start at the rear of the car and work forward, 3.73 gears and a 200-4R overdrive. This will help immensely.

 

[blackstallion]

Change your rear gears first most if not all n/a 231 came with a 2.41 rear gear ratio switch to a 3.23 or 3.08.Keep the 2 barrel carb better gas mileage and response than the 4 barrel.Get an electric fan,headers,good performance exhaust,advance the timing,lighten up the vehicle,give it a good performance tune up.If you want more power then you will have to spend more and get into the motor.