Cobra Supercharger on a Northstar

whipped · Post by **whipped** » Thu Sep 15, 2005 1:14 am

Shaun41178(2) wrote:hmmm I think S8n might be onto something. Screw the Cobra blower and maybe try adn work on finding a cheap caddy supercharger setup. Its made for the n star already.

isn't that a 4.4 SC? I know the .2 difference isn't a lot, but I imagine a lot is different between the two engines, maybe even starter position, who knows.

rockcrawl · Post by **rockcrawl** » Thu Sep 15, 2005 6:25 pm

Here are some interesting pics from my archives.

These were Gary Zumalt's creations, must have been almost ten years ago now. I looks like there is an intercooler under the blower. The other one looks like a LT-1?? bolted to a 4T80E. I've never heard of either one of them being completed.

S8n · Post by **S8n** » Thu Sep 15, 2005 6:39 pm

Shaun41178(2) wrote:
I would personally like to welcome you. I think you know quite a bit and can offer a lot of tech knowledge to this forum

BTW I am out of the Daytona Beach area.

Thank you! I'll be building my car out in Dade CIty, but I live in Orlando. Let me know if you're gona be around.

As for the first pic up there, yes, it is the new Caddy S/C. Very compact as the intercooler sits on top of the supercharger. Neat design. The entire unit shouldn't occupy anything in the valley that the non s/c intake doesn't.

crzyone · Post by **crzyone** » Thu Sep 15, 2005 7:25 pm

chrfab puts superchargers on fieros, don't know how much they charge though. Quite a bit more than a used 112.

whipped · Post by **whipped** » Thu Sep 15, 2005 7:41 pm

S8n wrote: Very compact as the intercooler sits on top of the supercharger.

How does that work? Air going into a supercharger is already at ambient. :p

S8n · Post by **S8n** » Thu Sep 15, 2005 7:55 pm

whipped wrote:
S8n wrote: Very compact as the intercooler sits on top of the supercharger.
How does that work? Air going into a supercharger is already at ambient. :p

Air enters the supercharger through the back of the case, and it forced out the exhaust port of the supercharger. The cobra has the exhaust port on the bottom, the Caddy has it on top. The air goes up through the intercooler and then down the intake runner to the head. The Salleen kit for the new Mustang works this way also. Very clean looking install.

The Dark Side of Will · Thu Sep 15, 2005 8:00 pm

crzyone wrote:chrfab puts superchargers on fieros, don't know how much they charge though. Quite a bit more than a used 112.

They put superchargers on Northstars. I've never heard of CHRFab doing anything directly with a Fiero. Of course people who buy their stuff can do whatever they please with it.... It's just that most people who can afford a $30,000 engine are not considering putting it into a Fiero.

The Dark Side of Will · Thu Sep 15, 2005 8:04 pm

whipped wrote:
Shaun41178(2) wrote:hmmm I think S8n might be onto something. Screw the Cobra blower and maybe try adn work on finding a cheap caddy supercharger setup. Its made for the n star already.
isn't that a 4.4 SC? I know the .2 difference isn't a lot, but I imagine a lot is different between the two engines, maybe even starter position, who knows.

There is quite a bit of difference between the engines.
The SC has 2mm smaller bore in order to make the cylinder liners thicker. The block is sand cast closed deck instead of die cast open deck. The bay-to-bay breathing windows inside the crank case are chamfered instead of sharp cornered. There is an extra oil gallery immediately above the crank that supplies piston oil squirters.

The cooling effect from the piston squirters allows GM to run enough extra timing to gain 18 ftlbs of torque.

The engine was originally rated at 440 HP, but under the new SAE rating standard, that climbs to 469. Same engine, same power, just a higher rating.

whipped · Post by **whipped** » Thu Sep 15, 2005 8:43 pm

S8n wrote: Air enters the supercharger through the back of the case, and it forced out the exhaust port of the supercharger. The cobra has the exhaust port on the bottom, the Caddy has it on top. The air goes up through the intercooler and then down the intake runner to the head. The Salleen kit for the new Mustang works this way also. Very clean looking install.

hmm, so then air flows kind of like an m? Up out the supercharger, through the intercooler, and down the sides? The picture makes a little more sense now.

S8n · Post by **S8n** » Thu Sep 15, 2005 9:26 pm

whipped wrote:
S8n wrote: Air enters the supercharger through the back of the case, and it forced out the exhaust port of the supercharger. The cobra has the exhaust port on the bottom, the Caddy has it on top. The air goes up through the intercooler and then down the intake runner to the head. The Salleen kit for the new Mustang works this way also. Very clean looking install.
hmm, so then air flows kind of like an m? Up out the supercharger, through the intercooler, and down the sides? The picture makes a little more sense now.

Exactly. You can see the throttle body on the ass end of the supercharger.

THE PUNISHER · Post by **THE PUNISHER** » Fri Sep 16, 2005 10:48 am

Finally some progress!!

I don't have access to my car @ the present time (Tomorrow night I will) But, I have seen people turn the intakes on LS1's , can you do this with a N*? That would align the TB a lot closer tot he blower if you were to attempt a Vortech Unit.

This is hard to explain without diagrams , but if you had the inlet pipe go between the cradle and Frame you could duct it up through where the battery box used t be and into the TB. I relocated my batter , so there is enough room where it used to sit to cut a hole and duct a pipe upto the TB.. of course this all hinges on the ability to turn the Intake on the engine.

The Dark Side of Will · Fri Sep 16, 2005 11:01 am

Yeah, you can turn the intake... atleast on the '99 and older engines.

Could even get a reverse rotation Vortec and put it where the battery used to be.

S8n · Post by **S8n** » Fri Sep 16, 2005 9:39 pm

Here is a better shot:

From the pic it looks like it can be turned around no problem. The port spacing is the same and no coolant passages to get in the way. As long as the valley cover isn't in the way of anything. THis is of course, you were looking to use this kind of setup....

whipped · Post by **whipped** » Sat Sep 17, 2005 3:57 pm

what's the displacement on the 4.4 blower?

The Dark Side of Will · Mon Sep 19, 2005 7:17 pm

No valley cover.

S8n · Post by **S8n** » Mon Sep 19, 2005 9:29 pm

whipped wrote:what's the displacement on the 4.4 blower?

122 cubes. Prestty good size. The blower is only overdriven 2:1. That can easily be changed for alot more boost. Take a look:
Blown Caddy

Aaron · Post by **Aaron** » Mon Sep 19, 2005 10:05 pm

I want a Northstar :salute:

I honestly just read that N* page over watching porn.

But now, I must get back to my porn.

whipped · Post by **whipped** » Mon Sep 19, 2005 10:19 pm

S8n wrote: 122 cubes.

wow! That's bigger than the cobra/lightning one, for the same size engine. Reading that article was just.. wow. :love4:

p8ntman442 · Post by **p8ntman442** » Mon Sep 19, 2005 11:09 pm

I realy am contemplating scrapping the dohc aluminum block project after reading that. Even if I got it perfect, it would never be near what a stock lc3 would be. I estimate the cost of the swaps would be close, excluding the purchase price of the lc3. Im starting to realize that time with my son is worth more to me than time in the shop, and a completed n* swap would be nice to have for a daily driver. Im sure they get decent mileage in a fiero. Has the lc3 been swapped into a fiero yet? Is it even available? I guess if the jy guy ever quits dicking me around and delivers my car and motor, I can get a look at the heads and see which direction to go. I am seriously torn though as of now.

whipped · Post by **whipped** » Tue Sep 20, 2005 12:32 am

2006. Don't expect the motor to be <$4000 within the next 5 years.