96 Buick lesabre
 

So I'm trying to get the best possible fuel mileage out of my 3800 powered 96 lesabre currently I'm thinking about newer injectors with more and smaller holes. One of my problems is that it is a 96 and no one tunes 96s because it's not covered by up tuners but I might be able to swap in a newer computer and have that programmed for better mpgs but I'm not sure that it will work with the cars security system and the older style transmission the car has. Any help I can get would be much appreciated

I don't think there is much to gain by messing with the fuel delivery system. Sometimes you can make it worse. Not enough to warrant the complexity and possible expense. Most people look at this part after they have done everything else like aero belly pans, grill blocking, wheel discs, weight reduction etc

What else have you done so far?

Well so far my mods include llr tires at 51psi, lawn edging air dam, lower grill block, passenger mirror delete, ac & ps delete, led taillights, cat delete and a massive k&n filter

I need to find a good way to attach pizza pans to my aluminum rims and do a belly pan plus I'm going to replace the intake manifold gaskets and clean everything including the egr while I'm at it.

Last time I was on HPTuners website I thought i saw that they were looking to expand the supported car list. I think it said something about free credits to tune the car if you scan it and send it in to them so they can do the work so you can tune it. 96 should be OBDII so you at least have plug and play instruments available like a scangauge or ultragauge. If you already have HPTuners I think tuning could be a fun project, but I'm not sure it's going to save you $500 to pay for the purchase of the program...

I might get hp tuners one of these years I would like to do it myself and fine tune it for the best possible fuel mileage and I've been wanting to set it up with a small turbo maybe off a dsm I want to build 1-2 psi at 1650 rpm because that's what it runs at 60

I'm trying to grasp what the benefit of slight boost at steady cruise will be.

It would make the engine more efficient by using air to help shove the pistons down instead of using the pistons to pull the air in. Plus it would warm the air and effectively up the compression ratio by upping cylinder pressures

I'm trying to reduce the load on the engine so far I have replaced the ac with a delete pulley and removed the power steering. I have also replaced 108 watts of incandescent taillights with 8 watts of leds and removed the running lights from the trunk lid that's another 16 watts. I still have to replace a few more and upgrade the headlights so I can get rid of my 200 watt fog lights. As far as aerodynamics I've added a lawn edging air dam, taped over the lower grill, removed passenger mirror and filled the gap between the headlights and the indicator lamp with calking. The motor and transmission just died so I replaced them from a car my uncle had laying around but the car hasn't ran for over 2 years. It seems to run really good but it dies if it goes into idle. I'm not sure what my next project will be but I'm thinking belly pan

The last couple of tanks have been less than impressive. At first I thought it might just be because of the cold winter but I hooked a obd 2 scanner up and it showed that the maf and 02 sensor aren't working. I ordered new ones from rock auto for $110 vs AutoZone at 200. They should be here next week so no driving till then but I'm expecting a decent improvement in economy.
Btw how do I upload pics? All I have now is a smarty phone and when I try to upload it says the pic is too large

Isn't that body style the one that has BETTER aero with the mirrors in place??

To upload pics you can attach them to your post via the paper clip icon in the full screen post. Its right next to the smiley face icon. Otherwise you have to upload the pics to a website like photobucket and copy and paste the "img" code from there into the post.

Also explained here: http://ecomodder.com/forum/showthrea...der-18279.html

Buick aero
 

Take a look at the '86 Pontiac Grand Prix 2+2 and Monte Carlo AeroCoupe.
These GM cars were developed for NASCAR homologation and what they did to the rear windshield (backlight) gave a significant drag reduction,short of going to an actual Kamm roofline.
Something like this would really reduce your road load at highway speeds.
GM did this in 1959.Their notchback was Cd 0.48,while the same car with fastback roof was Cd.0.44.
Chrysler did it in 1968 with their Charger,again,for NASCAR homologation.
Ford did this for 1983.The Thunderbird and Cougar are essentially identical cars with the exception of the roof.The T-bird is Cd 0.35.The Cougar,Cd 0.40.

Thanks for the info I would love to do a kamm back nothing that goes past the end of the trunk. It doesn't need to be on hinges or anything because I don't use my trunk. I had pizza pans on it but didn't have a way to secure them to my aluminum rims so I'll have to figure that out...

http://i727.photobucket.com/albums/w...0127151225.jpg
Semi l.e.d. In factory taillights

http://i727.photobucket.com/albums/w...025141139a.jpg
With pizza pan

http://i727.photobucket.com/albums/w...0408-00120.jpg
Without pizza pan. These are rims off a old Ford ranger

I need to get my ultragauge fixed the screen quit working and then I can experiment with aerodynamics

Got the 02 and maf sensors replace plus got my massive oil leak fixed. The leak was caused by oil blowing straight through the oil pressure sender and coming out the electrical plug. the brake lines are needing to be replaced it had a leak in one of the lines so I had to replace part of that line but am planning to do all new stainless lines before I do a belly pan

As a cost cutting measure on the 3800's they use plastic valve covers that get brittle and leak but on rear wheel drive apps such as the camaro they use aluminum valve covers and I just ordered a set off flebay and after I get them I'm switching to mobile 1 0w30

Things took a turn for the worse Tuesday night when I noticed white smoke coming for the exhaust... blown head gasket. So I've spent every non working moment fixing it I replaced every gasket in the top end, cleaned all the valves and lapped them so they all seal now, installed my new valve covers and cleaned every part I removed I'm just about finished and can't wait to see how it runs

Check your intake at the egr port? I push on a pick fairly hard when I do, I'd rather finish one off that's barely holding on while its apart http://www.autotrend.us/gm/3800%20(25).jpghttp://ww2.justanswer.com/uploads/Bl...e_Manifold.jpg

Ya I got all that cleaned and finished Saturday afternoon and put about 500 miles on it this weekend. I also switched to mobile 1 0W30 I was kind of nervous about putting such thin oil in a motor with 250 thousand miles but it was running 50 psi going down the road and 25 at idle. The fuel mileage was back up to 29.9 without my ultragauge so I can't wait to see what I'll get after it's fixed