supercharging a 4ac (hypothetically)

[MWP]

Apparently over 1000 s of Km's the fuel will cause the teflon to come off the rotors and heat will build up in the SC and eventually it will cease.

"Apparently" is the key word here.
As i said above, Teflon is fuel resistant so i cant see how fuel would cause the Teflon coating to fail.
But i guess we wont know for sure either way until someone on here tries.

[Billzilla]

As mentioned above, it's just bad money trying to do all that. Yes you'll be able to make it work but with a lot of fiddling and the end result may or may not last. And it'll still need a lot of fiddling constantly.
If you're trying to do it on the cheap, just get a bulk-buy Megasquirt and scrounge the rest of the bit you need to make an EFI engine. It'll be better in just about every way.

But if you have to stay with the current gear, I'd recommend a pressure-carby setup as it'll cause less problems with the blower as it won't have fuel running through it and maybe puddling. That's also bad for getting an even air/fuel mixture into the engine.
If you build a box to pressurise the carby, make sure the float won't collapse under pressure. Some aren't very strong and will implode, and then the engine will run very rich.

[LeeRoy]

Maybe through increased pressure from the supercharger not being able to compress the fuel. I'm thinking it would be the same as how rods can be bent by a motor copping a mouthful of water and trying to compress it.

- LeeRoy

[bnicho]

Weber bought out a sealed downdraught carby for blow-through Turbo applications - the 32/34DMTT. They bolt on to your stock 4AC intake manifold using a redline weber DGV adaptor plate. If you could find one of those complete with the intake "hat" you're laughing.

They do turn up on eBay occasionally, but are usually not cheap.

[oldcorollas]

megasquirt.. and a throttle body injection unit, as found on... maybe falcons or camira..
keep your current manifold, tuneability of injection.

[doityourself]

can the injectors in the EA single point injection TB be changed for something smaller?

[Wedged'86]

wow i can honestly say that i never knew there were so many options for tuning a 4ac.
EVERYONE i've talked to about it says the same thing, chuck it. It's good to know there's some potential there.

By the way , turns out i got screwed on the supercharger so none of this will be happening soon. but like i said thanks for all the info.

[Draven]

just a point... you yourself said you were planning on a 4a-ge soon.

why not deal with the 4a-c for a while, save the mod money, then go a gze instead of a ge?

[Wedged'86]

cause i've got two years left on my p's and i don't wanna spent that time with a woefully slow car. believe me i've thought about doing that alot.

[oldcorollas]

doesn't P's preclude modifying to have super/turbocharger also?

[Wedged'86]

Oh hell yeah, they jumped on that like oprah on a baked ham, but cause i was offered the SC i thought if it was simple enought i would whack it on and considering it had a clutch i could turn it off so as not to draw attention, and would have a more decent amount of power till i got a decent engine.
i was just gonna take the risk.

[oldcorollas]

fair enough.
SC12, megasquirt, falcoon TBI (should be fine for idle.. maybe a bit rich but possibly better than carby ), stock manifolds..... profit...

if you really wanted to placate the cops, remove SC belt when not racing
does 4AGZE crank pulley fit into 4AC?

for the hassle and cost, i think it would be a bit of fun.... maybe not the best use of $$, but then.. cars never are and you would still have the SC and MS for later (or sell the setup to other disadvantaged P-platers )

[Wedged'86]

see these were my thoughts exactally, good for a bit of fun and to gain experience. plus the parts are harvestable for a 4ag (most of em) could always put the supercharger on it and everyone raves about megasquirt.

[The Witzl]

I have seen this done on a car that sold on ebay...

... it looked stupidly complex and wasnt that powerful.

[doityourself]

Change the ribbed belt set up on the SC12 for a Mitsubishi Sigma Aircon V-belt pulley