So I'm looking to supercharge my carb'd 305 for under $500 because I have no idea how many miles are on this thing.

I want to do a remote setup bracketed to the passenger side and run the v-belt setup still. I'd use an Eaton m90 off a GM 3.8 or an m112 from a for. On the bottom I was thinking of making a metal plate with an opening that will connect piping to a carb hat so this would be a blow thru setup.

On the back (m90) or side (m112) I'd have a tube with and air cleaner connected to it for the intake. I was not planning on chainging the quadrajet or intake to do this and keep the mechanical fuel pump so the fuel pressure will stay the same. If I had the money than I'd just buy a kit for a couple grand and be done with it. Also, there wouldn't be an intercooler.

Yes, I've read through the posts on doing this when I searched but most everything is for TBI or TPI setups. I've been researching this for a few days and just want to know if this is a waste of time before I go any further. It didn't seem like anybody had any direction on a blow thru setup.

 

That's pretty high if you ask me. They can have bad bearings and etc. I can pull them out of the junk yard up here for under $100. I don't know if a m90 would support a 305. I've seen pics on here of m112s (twins on 350s).

Carb would have to be blow through style which will be expensive. By the time you fab the setup and make it good to run you'll have quite a bit in it probably.

 

you cant use the stock carb on a blow through set-up.

 

With some porting/massaging and fudging of their rpm limits you can get quite a bit out of even an M90. My brother's car (ford 5.0 powered 4 door LTD, I've posted a few pics on here and other places and there was an article on it in MM&FF) has hit low 11's with a single M90 (mounted like an accessory), and he just blew it up after converting to an M112 and he's hoping that that eventually pushes him deep into the 10's. Of course, there have been twin M90 setups out there that didn't go that fast...

 

Well I guess if I can't use my carb it's not a huge deal but I still can't figure out how to mount it after looking closely at it.

What would be the best setup for the least amount of money keeping the stock intake and carb for the time being. I'm trying to keep the cost way down but the Vortech and Weiand setups are expensive even used.

 

With stock carb your only real choice is nitrous....

 

I agree. Forced induction SHOULD require carb to be setup to see boost. That usually includes different floats and etc, possible fuel pump upgrade or booster.

You should be able to do a 100 hp shot on a decent stock 305 without problems with minor things such as pulling out some timing and running slightly colder plugs and a nice Kit.

 

(If you can find one) Have you thought about modifying a 301 turbocharger to fit on an intake with an adapter plate? Just throwing it out there. You could use an adapter plate on a single plane intake. That would get your feet wet, but even it may be over your $500 limit.

http://cgi.ebay.com/ebaymotors/ponti...Q5fAccessories

That would be what I'd do. Either that or find one of the old Accell/Martin kits. Because it was draw through it would let you use your existing carb with very minimal modification, and a lot of the components like a bonnet would not be required. You would definitely need to have some fabrication done however, so I hope you or a buddy have a MIG welder. I'd probably end up getting some L98 Corvette headers or shorties, flip them then Y them in at the turbocharger.

 

I was weary of the turbo setup because of the exhaust work and intercooling. That 301 setup could work but it looks like that intake in the listing wouldn't work with my centerbolt heads.

I was thinking about nitrous but I'm just afraid of messing something up and blowing the car up lol. I was looking at a sneaky pete carb setup. That seemed small and cheap.

 

dont listen to those guys, they dont have a clue what they are talking about. It would be a waste of time for you though. Only because you probably dont have the fabrication experience to make the brackets, and adapter plates to mate the intake and carb.

an eaton m90 is not a blow thru unit!!!!

 

Thanks for the tip

Back on track, the M90 is plenty for your 305. If you can handle the fab work, do so. Personally, Id use a Thunderbird M90 over a GM unit because its easier to package. Id also suggest using an intercooler, they really are heat pumps

 

Uh, yeah. You're not going to Weiand or BDS and getting a turn key kit for 5 bills. Or even a used kit in all liklihood. That kind of budget is seriously pushing it even IF you can fabricate, but definitely impossible if you can't.

M90s work fine for a blow through unit. Why wouldn't they? Ford did it in production vehicles.

The adapter isn't too hard to make for one of those turbos, you get a single plane intake and a piece of 3/8 aluminum stock (ebay for probably under $20) and then you mark the holes, drill and tap em.

 

Wow, this thread is all over the map!
When we talk "blow through", we're generally talking about the CARBURETOR. You can blow through, or draw through a carb. If draw through, very few modifications are required. If blow through, you need to do more. Not impossible, actually fairly easy. You do the same tricks as you would with a holley. Search for blow through Q-jet it's been done before. Forced induction websites have more info. Turbomustangs (ironically) comes to mind?

A supercharger can be a "wet" or a "dry" type of design. That makes more sense than saying blow through, since your always blowing through a supercharger (??). It's just a matter of if there is fuel in the mixture or not. In your case - not.

Either way, you'd need to boost your fuel pressure, you can't keep the fueling system stock. You can either put a pump in your tank or in line, and a boost referenced regulator. Not a deal breaker either way.

I doubt you'd be able to use a v-belt however. They draw a decent amount of HP, so you'd probably want either multiple v-belts (ugh), or a serpentine setup. Also, not a big deal.

It's a fair bit of fabrication, and junkyard scavenging, but if you're interesting in doing something unique, go nuts?