Inliners International Forums General Discussion Blown and Injected Supercharged 250 Chevy

Have a 65 Chevy II with a fresh stock 250 with an Offy intake, carb and headers would live to drop on a "new style" ProCharger type Supercharger. I think it would be easier overall than Turbo Charging .

Is there an older thread or website of anyone who has assembled this style of performance ?
Thanks
James

I just have pics of my old set-up.
Example:


MBHD

Wow Hank.

Was this ever completed and tested! You are one of the turbo gurus. So what made you stop and go in that direction
If you compare based on Expense and Labor and not total performance, am I correct to to believe that this is easier!?

Yes it was running in my Camaro on a 250 engine.

I never ran it @ a track, but did race it a few times against my friends 66 Nova that went to the track very often.

One night my friend w/the 66 Nova just got back from the track after running consistant 12.70's & asked me if I wanted to race him, I said sure. He has never won again my 6 cyl Camaro LOL

We lined up & I beat him by 4-5 car lengths. So just an estimation against my friends consistant track/street Nova
maybe my Camaro would run 12.40's.

I could only get 8-10 psi max boost (plantary ball drive) + I maxed out the rpm of the blower.

So basically, the Paxton blower limited me on how much boost I could run.

If you just get a complete early 3.8 Regal turbo ,or 1981 Turbo Trans Am 301 CI set-up for draw through, that would be the easiest, & can be done cheaply.

As far as easy to install & run, it all depends on if you could use a SPA exhaust manifold or just use a stock truck 2.5" exhaust manifold or Toms split cast iron manifolds. Then you would not need to fab up a turbo exhaust manifold.

I would have to say, a turbo set-up would be easier & less $ to install & use a turbo set-up.
Boucher & Snowman have simular set-ups, easy to install, I have not totaled up money spent on Snowmans parts (maybe he will chime in here), but Boucher was about $800 IIRC?

W/a supercharger, you need to fab the brackets, a supercharger (mine new was $1100.00 just for the head unit, years ago) make pulleys, belts,tensioners & so on etc.
Note: the supercharger belt must line up perfect or else it will keep throwing belts or jump a few ribs on the serpintine pulley.(I know first hand)

On my set-up the supercharger blew through 3 48 MM DCOEs

The newer blowers, centrifugal type are gear driven & can give you any amount of boost you would like, they are much more money also.

You can buy a new Ebay turbo like Snowmans for a few hundred dollars & boost 10-20 psi pretty easy.

A blower that can give you 20 psi, is going to cost you approx $2000.00 (rough guestimate)

If you look @ swapmeets, & buy used parts like a centrifugal supercharger head unit, blow off valve, make pulleys etc, it is going to add up more than buying new Ebay turbo parts.

If you are not looking to make a lot a psi those cheap Ebays turbos seem to work just fine for low boost set-ups, some have great success running high boost, I just dont know how low they last.

So, IMO, a low buck turbo set-up w/using the stock exhaust manifold would be my choice for ease of installation & less cost to you.

I used to get a lot of people saying how they liked my blower set-up @ car hops & w/a supercharger, you usually see the supercharger & is more of an eye catcher than a turbo IMO, but it's really up to you if you want a supercharger or a turbo.

MBHD

It seems like I added everything up and it was about $1200-$1500.

Rough estimate of my parts list
-Offy intake = $150
-Holley 500cfm 2bbl = $150 after rebuild
-GT35/T4 Turbo = $300
-Wastegate = $60
-B.O.V. = $60
-292 Manifold = $100
-Turbo oil feed/drain kit = $50
-Mandrel bends and piping and flanges = $150
-Intake tubing, bends, and couplers = $80
-Spectre Turbo Hat = $100
-HEI = $100
Plus various parts which puts me right at $1300+

I think turbos are better for fun daily-drivers and supers for drag cars and show cars. Because even though I haven't driven a supercharged car first hand, it seems like mileage would be terrible since you can't control the boost with the throttle plate position. I'd rather have a little turbo lag and be able to drive it everywhere. I mean I got 15psi by 2800rpm so it's not that bad. And that 15psi was badasssssssssssss. But 3psi like I running now just makes it a little more torquey. I'm going to probably keep it at 6-8psi after a spring change. I'll stop rambling now :-)

This is more of the talk strategy I was looking for. Since my car is destined for 98% street daily driver use. I am looking for "real world" applications adding up budget and labor considerations.
But let's face it, I want some "boost" too!

I was in your shoes too, I didnt know if I wanted to go turbo or blower.

I chose turbo because its kind of the best of both worlds. A big benefit to me is that if I keep your foot out of it I can still maintain my economy plus its free horsepower, or in other words theres no engine strain or hp loss to produce it.

Im going as low buck as possible and using a setup like what was mentioned above. So far its very straight forward and nothing difficult at all. Not to mention I'm using stock manifolds..

If you can cut pipe and weld you can do it, and if you cant you probably know or have a good buddy that can! ;-)

plus its free horsepower, or in other words theres no engine strain or hp loss to produce it

Not free at all, it just shows up as pumping loss.
The engine produces more power (and uses more gas) to make up for what is lost in the turbine. For anything but a very well-developed race system the exhaust backpressure is about twice the manifold boost.
10 psi boost = 20 psi exhaust backpressure.

Panic,

My real target goal is 300 hp street use only. Today's Turbo cars have many electronics added to help control use of turbos applied to these passenger cars.

I will not have those advantageous outside of a possible MSD (BTM ?) type controller. Do you think these goals are attainable while still operating this vehicle in a Daily Driver atmosphere? Given your equation for boost?

You can very easily, reliably and safely reach 350-400 hp for a street driven turbo setup.

James,

do you have stock cast pistons?


MBHD

I wonder if Procharger had recommendations for their equipment to an inline?

Hank,

Yes and I have a set of Sil-vi-lite flat top pistons too

I'm sue it would work, you may have to get creative with your brackets to get it all to mount up though. I do not think the pro chargers are cheap though around $1800 or so?

Yes that might be a deal breaker versus Turbo.
Unless Hank wants to make me a deal on his old set up? LOL?

Sorry James,

I sold it on Ebay to a guy in Australia a couple years ago.

MBHD

Too bad they are not forged, then you could push it a bit more.

Flat tops are good, 9- 9.5:1 compression w/a turbo would work fine, better/quicker turbo spool up, just need to watch for detonation.

MBHD

Ratz!
Don't suppose you have blueprints lying around!

No, sorry ,all the parts where one off pieces I made.

MBHD

So if ease of install were the goal would a Turbo outweigh a Procharger style Supercharger?

In my opinion, a turbo set up will be easier to install.

MBHD