4.3 Supercharged Chevy

[99Roadster]

Respect your initiative for taking on this project.....Whatever you do just keep us informed of your progress if you would please.....And good luck!

[Qingdao]

Originally Posted by 99Roadster

Respect your initiative for taking on this project.....Whatever you do just keep us informed of your progress if you would please.....And good luck!

Well I'm trapped in a forced vacation with my wife ATM. I'm so glad to be getting back to the garage in the next few days. Then I can start mocking things up, and poking the car.


I think I am just gonna buy a $125 4.3 off ebay for starters and toss a cam in it. Not even gonna upgrade rods.

I got the blower, and I found a used eddy on ebay as well for $100. Manual choke


Honestly, for the growing crowd of IMS failure guys. I think the 4.3 is the way to go. Naturally asperated and carbed; you won't have to worry about wiring (there are electric chokes but I like to pull the nob). Its 4" shorter than an LS motor so you won't have to cut up the firewall. With a simple cam and an intake you've got almost 300#s of tourque which is more than the 3.4 Porsche engine. And they are CHEAP and plentiful; Kennedy adaptor and a bit of angle iron added to an engine/cam/carb/intake is less than a 3.4 Porsche engine.

[JayG]

Originally Posted by Qingdao

growing crowd of IMS failure guys. .

really ??????

[Qingdao]

I took a crack at trying to replicate a part out of foam.


I put my M90 in a bag....



Then I covered it with great stuff...



Then I took the M90 out of the bag...



Then I filled that void with great stuff and Styrofoam...



The end result...




I took the end result out of the plug way too soon because I noticed the great stuff wasn't curing on the outer edges of the plug. I tried to drill an air hole and the bit caught the bad and made a royal mess....

I think I am on the right track but I need to use a card board box to retain the negative. I should be on my way to scoop up a 4.3 tomorrow.

[Qingdao]

Well... to hell with making a foam copy. This thing is gonna fit no problem. I might have to hack the fire wall some, but not any more than you'd expect.

And OoooHMYgod does the Eaton sit perfect on top of the 4.3.








All I should have to do is hack down the back of the M90 just a hair and tig up a square bore plate. Adapt the M90 for the 4.3 LIM; drop the carb on it and call it a day.




As for the size constraints here is the skinny...




The 4.3 is 22" long from flex plate to W/P... The 2.5 Porsche is about 23 ish (I can't exactly see down in there).

The 4.3 is TALL from the bell housing up its gonna be a whopper of 12" and after about 5 inches forward of the bell housing its gonna be about 16" (cause of the carb). According to my rough estimates that puts me at about right at where the top of the rear storage bin would be. Another words this is gonna fit under the glass.... BUT JUST barely under the glass.

[Qingdao]

Cut down the M90 some more. It almost sits flush on that LIM. Cool cause now all I need is a good 1/2" thick aluminum adaptor plate.





If I'm able to get the carb low enough I'll slap on my buddies old Duel fuel carb hat. How cool would that be having a duel fuel Porsche!!





I also put my vehicle make emblem on it; fits perfect.

[Qingdao]

Damn waiting for pieces. I ordered a 3/4" plate for the adaptor and carb, but it won't be in till Monday. In the mean time I'm twiddling my thumbs.

I did cut out this portion of the firewall. Hoooooo boy what a smell when the grinder met the old sound deadening material. It might also be my grinder is 60 years old and ready to retire.





Do any of you guys know for sure if these are the P/S hoses? They are right behind the drivers seat. They snake under the A/C compressor.