So I'm trying to figure out what size tires to run on my 88 GL project I will be using a 5 speed D/R trans with the 3.9 final drive but I want to know if you find 31's to be too big with that gearing. I also plan to use a EJ 2.5 franken engine in this car so it will have alot more power over the ae82 1.8. But I still dont want to have to slip the clutch and bog out just taking off from a stop.

I've driven a lightweight buggy with 31's it did alright.However, for a normal car bodied subaru with a Ea81/EA82 27" tires is about the max I would go.However, with a 2.5L frankenstein motor it should do just fine.in 1st low at idle it will probably be at 5-10 mph.way too fast to crawl but decent for trail riding.I don't know if you will find any mud capable of bogging the motor down as a plus.should be interesting.Be sure to post of some pics and maybe a video of the thing running..

I run 31s with a ej2.2 Measure out about 30 works great, wouldnt recomend it with the stock 1.8

Ive got and EA81 with a 5speed in an 85 Wagon, and its not going to win any races, but it still tends to go ok, mine mesure out to 30 1/2"

 

Jeff

Good to know you don't lose all off roading capabilitys with 31's, I dont, plan on this being a crawler, mainly just to take up the trails and mob through the desert and dunes. I'm going for more of a Dakar rally thing with it, and just think 31's look badass on a Subaru plus the extra clearance and approach will be nice.

 

Once I get some more parts and metal and can really get working on it I'll start a build thread.

I run 31's on my 91 loyale with a Ej2.2 in it pulls great plenty of power just get a Exedy clutch to handle the extra power!

I run 31s on my buggy and it gets by alright though it does only weigh around 900 lbs. But with a frankmotor you should have absolutely no problem pushing 31s. Bout the main thing id worry about is how well the DR 5 speed would handle that kind of torque buts thats a different subject.

i run 31 11.5 15 swampers on my 90 leg wag ..aka plow car with d/r 5sp and 2.5 dohc it will burn them in 2wd until 3rd no prob .......and also off road where it seams to end up more offin than none ......

Thats the sort of thing I was hopeing to here, now I just need to find a good deal on a set of mud terrains.

^ good luck...... I have a hard time spending 5 or 6 hundred when I only paid 300 for the car....

Yeah I only paid $75 for mine, got the 2.5 for $20 and the wiring harness for free form a friend so defenitly looking for a deal

sweet deal man good luck with the build looking forward to see some pictures

you might be a redneck(or poor) if your tires cost more than the car.