Hi I have a 92 chevy caprice that I would like to like to get 40mpg with but I cant afford a cummins 4bt right now so I would like to see what kind of millage I can get with the v8. so far I have upgraded to electric fans put weather striping around headlights and front of hood and several other small things so I was shocked last night when i filled the car up and found out that I was getting 25mpg since I normally get around 20 mpg and on that tank I had a 90mph cruse to work cause I was late weird huh? anyways I would like to get those racing hubcaps but am not sure if they will work since I have the aluminum rims .was also thinking about a air dam but am not sure how long to make it. any other ideas?
Do a lot of reading. It's been said the biggest improver of fuel mileage is adjusting the nut behind the wheel.
Speed is the biggest killer of fuel economy, as well as quick acceleration. Have you put 50 psi in the tires yet? That's the easiest and most popular mod I think.
Check out the 4BT forum for giggles if you want. Lots of info there on putting in a 4BT.
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Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
Yeah the tires have plenty of pressure. And I,m already a member on 4btswaps.com thats where I found a cummins for $2500 but I have to get my mazda running first plus I have been savin for a bike I was thinking about a buell blast then I will get a cummins
If that 92 has the th700r4 tranny, which has a 3.07 1st gear, &.70 overdrive. You could get away w/ a set of 2.56s or lower rear gears. Make sure your cooling system is working good, install a 205* t-stat. If it has 9.5'' rear drum brakes they did havve aluiminum drums on caprices. Anyway to warm it up quicker will help overall mpg.
however, you should still be able to do a lot of aeromodding and other required modding to the car while waiting on the 4bt, so that when you get the diesel installed, you'll be well along the way of getting 40mpg
__________________ RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
As for the reason Bragging rights plus I plan to have the car for the rest of my life and for the stock engine I'll try to get about 30mpg out of it. I'm workin on a air dam I'll try to post pics tomorrow
Since you're planning an engine swap later, I am guessing you don't want to put in an RV cam in the gasser. New gears should be considered as part of the cost of the engine swap. You will want them to keep the RPM in diesel range.
Air dam. Start with mock up dam and put it on the ground & trim until you don't scrap anymore. Then make a real one that length. If your material is pliable enough to take a few hits & fold back instead of breaking off you can run it a little lower.
You can run Moon Eyes on aluminum wheels. You just need to drill & tap 3 holes per wheel to screw them onto. Several people here have come up with ways to avoid drilling holes into their wheels.
Does the Caprice have the partially cover rear wheels like the Buick did?
.was also thinking about a air dam but am not sure how long to make it. any other ideas?
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