WJM Posted November 8, 2003 Share Posted November 8, 2003 Ok.....and update on the FT4WD conversion...after the install. Alrighty, Ive had to put a completely stock 4wd exhaust on for the time being to pass emissions. Right now im running a 3.90 diff with the 3.70 trans...so bad news. So far nothing seems out of the ordinary. I've got a 3.70 awaiting new seals and fluid to go in. Fuel milage change over the years is as follows: 2wd auto, stock: 22 MPG 2wd auto, open intake and exhaust: 24 mpg 2wd manual, open intake and exhaust: 29 mpg 2wd manual dragging 4wd rear end stuff (diff and axles): 28~29 mpg FT4WD manual with open intake and exh: 28 mpg FT4WD manual with open intake, but STOCK exh: 23 MPG!!!!!!!!!! :banghead: :banghead: So, as soon as I get done with the massive RX buildup, the GL-10 will get some kind of Super Ultra free flow exhaust, AND intake. And dont forget a 3.70 rear diff. I might change the trans and diff over to Redline syn gear oils. Oh, and note that I am running Mobil 1 fully synthetic 10w-30 and 93 octane fuel from Shell at all times. P.S.........And another thing, after installing that exhaust, the engine runs 10 deg. hotter, and I had to retard the timing WAY back to keep from detonating......... P.S.S......I got my cams back form Delta Cams, I'll post about that soon. Quote Link to comment Share on other sites More sharing options...
calebz Posted November 8, 2003 Share Posted November 8, 2003 Holy Exhaust Batman! The difference in mileage is crazy:eek: Quote Link to comment Share on other sites More sharing options...
WJM Posted November 8, 2003 Author Share Posted November 8, 2003 sho is. Quote Link to comment Share on other sites More sharing options...
bushbasher Posted November 8, 2003 Share Posted November 8, 2003 I thought the 4wd parts would create more drag than that, I guess subaru really knows how to make 'em. Also interesting that the exhaust makes a difference with pinging. It's great that you are taking this step at a time, with basically a controlled experiment, recording data. That was probably one of the most informative posts I've read on this board... Thanks! Quote Link to comment Share on other sites More sharing options...
WJM Posted November 8, 2003 Author Share Posted November 8, 2003 no problem. i imagine a properly maintained DL/GL/Loalye/Leone 4wd manual, EA82 with fuel injection, and freel flowing intake and exhaust, SPFI or MPFI, would get over 30 mpg. Even with FT4WD. I imagin the turbos would'nt get higher than 26. As for carbs....I ahve no clue. I hear of them getting higher than 30. As for my turbo, it got a SPFI shortblock under all the turbo stuff...so I get higher MPG than other turbos, plus Ive got mods on it. After I get it to pass inspection and the RX is done, I'm gonna try to get to the 30 MPG mark...then pass it. Quote Link to comment Share on other sites More sharing options...
XSNRG Posted November 8, 2003 Share Posted November 8, 2003 Are you running without a rear driveline with the diff lock on? Quote Link to comment Share on other sites More sharing options...
WJM Posted November 8, 2003 Author Share Posted November 8, 2003 Its FT4WD...the difflock is off. I still have everything hooked up. Driveshaft and all. AWD/FT4WD is da bomb....even with an improper diff. So far, as a data note, I have noticed no difference in car/drivetrain behavior from the RX vs the GL-10 with the XT's FT4WD with a mis-matched diff. Quote Link to comment Share on other sites More sharing options...
bushbasher Posted November 8, 2003 Share Posted November 8, 2003 probably won't make much difference except the center diff will always be spinning, which it wouldn't normally be doing. subaru probably went all the way and made it beefy enough to take that though. I wonder how it would behave sliding in the gravel with difflock on. Quote Link to comment Share on other sites More sharing options...
WJM Posted November 8, 2003 Author Share Posted November 8, 2003 Either bad oversteer or bad understeer. The rear wheels would be turning slower than the front. Quote Link to comment Share on other sites More sharing options...
electryc_monk Posted November 8, 2003 Share Posted November 8, 2003 gotta love the raind and blah cold... we might be playing with the "Lil Red Wagon" on sunday *IF* and only *IF* its cleared up and warmed up. the mileage is wild.. .the best i ever got in the gl 4WD 3.90 d/r 5 spd (carb'd) was a one time tank full thru chicago in the laste fall at 31. mpg ONCE. back then the usual was 26-28 mpg in that ole girl. this turbo wagon with the same drivetrain is lucky to hit the 25 mpg barrier. its been as bad as 14mpg but, THAT was a semi full cabin and a loaded to the gills 4X6 foot box trailer from uhaul for the moving of random stuff back to michigan from texas. that was running 70-80 mpg too and the best i got in the run up there was like 18 when i had to do the 65 in illinois. Quote Link to comment Share on other sites More sharing options...
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