Hey gang, I read about this plug-n-play swap and thought it sounded like something I could try. I have some basic breathing mods on my '94 so what the heck. (Intake, mild porting, mild cam, headers, 2 1/2" cat and Flowmaster.) I located one at a local wrecking yard for $75.00. When I went to pick it up, it was clear that it had already been cut open. They weren't going to let me cut the seal to see if the gear wheel had been marked so it was a little roll of the dice. But then I thought, hell, if this is going on a different set up anyway, it's going to need to be tuned regardless, right? So what the hell. When I got it home and opened it up, there is a small mark that I assume was the reference starting point. I'm also assuming that the wheel was marked in relation to the clip that sits in the tooth of the wheel. If all that is true, then this AFM was tuned 5 notches rich from stock. This is my existing set up. The Downey intake is a big aluminum piece that mounts to the fenderwell and then the AFM bolts to that. This would make a simple swap even easier. Also note that my stock AFM has already been cut and adjusted as well. This was done by the prior owner so since I'm dealing with two previously tinkered with AFMs, I don't really have a solid baseline for comparison. Oh well. We'll still just have to see what happens. Here is the gasket from the '82 Supra AFM which clearly shows the size difference. All I had to do was drill two new holes and carve out the aluminum some. Piece of cake!! The '82 Supra AFM installed. A short adapter tube from Kragen for $7.00 and I'm good to go. Yes, I realize that it reduces in size from the AFM to the intake tube, but that's as much as I want to spend on it for now. Plus, the intake at the plenum is only so big so it seemed kinda silly to spend more on tubing just to shrink it down in the end, anyway. Here we can see the '82 Supra AFM in place with the lid off. Just barely noticeable is the scribe on the gear wheel about in line with the phillips screw. Again, I am assuming that the stock position was with that mark at the clip where it locks into the gear wheel. I mean, if I was tuning it and had to set a baseline, that's where I would mark it as that seems to make the most sense. Who knows, though? hahahaha For now, I'm going to drive it with it in this position. So how's it work? Good!! Yes, for sure it feels better.My highly unscientific seat of the pants dyno says that it feels a little stronger and feels like it simply breathes a little better. Not like "Holy ****! This sucker hauls ass!" No, more like "Whoo, yeah, nice. Seems to pull a little better." There you go. That's my highly unscientific report. Am I glad I did it? Yes, absolutely. It was an easy plug-n-play swap that wasn't very expensive that yielded a subtle, but noticeable improvement. Now I'm off to tinker with the AFM setting! Any suggestions on how to really and truly accurately tune it ?
Yeah, I've seen those and that did occur to me. Maybe some other time. My desire to keep it clean, easy and simple overrides the small gain for that. My energy would probably be better spent dialing in what I have. And I'm still trying to figure out a little bit better front brake set up. Thank you, though!!
I have one of these supra AFM's sitting around and i haven't messed with it yet. but i had a question, would it mess with my emissions at all? That's the main reason i haven't done any thing with it yet..... i was going to get emissions first and play later. Thoughts?
anything that changes how the truck runs/feels will affect emissions. how and how much will partially depend on what else you have done to it.
I remember when i did this mod a few months back I already had an upgraded intake and when i put the afm from the supra on I honestly didnt feel a big difference...maybe it got A little faster? it definitely didnt get slower but maybe .5-1 hp gain? not sure? i wish i had a dyno for a before and after
