The Stovebolt Site Forums The Shop Area The HiPo Shop 235+turbo?

Just playing with the idea of a turbo on my stock 235!Sick of my Rochester leaking!Has anyone done this with boneyard parts?If so off what engine?I was thinking of maybe a T-Type 3.8 Regal or Gran National.Also thought of maybe a small Izusu cabover diesel.My brother is a tuner guy and came up with the idea.Just an idea but am really interested to know .Thanks Al

Lots of info at inliners.org on this. There are guys who do it. My dream project is a turbo or supercharged 302 in a 30's GMC hotrod pickup.

Fun idea. There are books available that detail do it yourself turbo charging. I can't give you any titles, but I know I've seen them on the shelf at the bookstore...

I think a blower would be better!

I agree with the blower but when the last time you saw one in a junkyard! My next question is doesnt "inliners" cost?With all the info out there I really dont want to pay for it !Thanks for the answers and Please keep them coming Al

No cost to become a part of their forums. You need to register but participating in their forums is free. They are a great source for additional info....almost as good as the "Stovebolt".

Dave

http://www.inliners.org

What i was thinking was to use one off of a supercharged GM 3.8 V6, say from a Pontiac grand Prix GTP. It looks to about the right size to mount easily, and should be easy to get one out of a junked car. Or, if yoe get REALLY lucky, you might just find an original S.C.o.T. blower from the '40s/'50s, though the Chevy versions are extremely rare, and not being reproduced like the Flathead ones are.

If you are going to do a turbo on a stovebolt, I would suggest going a step further and installing fuel injection, then you can control timing and boost with the computer too.

I've got a Jimmy 302 in my garage that I'm working on gathering the parts for- I'm going to do a MegaSquirt II fuel injection on it, using mostly GM parts, get it running well, then add a 4-71 blower and volvo intercooler to it. I figure with stock compression it ought to take to the boost pretty well. Its going to replace the 261 in my truck.

There is a guy on youtube.com that has a turbo on a 261. Search "turbo 261"

The installation is a bit primitive, but it seem to be working.

Personally, I would put a turbo or supercharger on a 261 before I would on a 235, as the 261, from what I have read, has a beefy lower end.

Personally I would choose a turbo over a blower. My v6 turbo in my regal makes upward of 400hp and over 450ft/lbs of torque at 25psi of boost. And alcohol injection allows me to do all this on pump gas. I won't promise that on a 235 or 261, but it will be easier for you to make more usable HP and torque for the street with a turbo. You compare the supercharged torque ratings of a 231 v6 to a grand national engine and the turbo engine makes over 100ft/lbs of torque than the supercharged version. Just some food for thought.

If port injecting a 235, I think the siamese port could get you into trouble. It's possible for a given cylinder to take more than it's share of the shot from two injectors, resulting in the other one being way lean.
You could fudge a blow-thru TBI injection setup with junkyard GM components, if your guy is pretty good with the tuning side. He has to increase the Accel-Enrinchment to make up for wet manifold operation, among other things.
mv

read "maximum boost" by corky bell. it is available at most book stores, it is a must read for anybody interested in turbo systems

Turbos, Blowers, on a 235??? Only if it's just for the fun of it...
Better buy a case of crank shafts while you're at it. :hammering:

^^^ The 216 and 235 most likey will not be able supply enough oil pressure for turbo.

A.Grahm Bell in his book on 4 cycle engine tuning has a section on how to port siamesed ports to minimize or eliminate charge robbing

Hi Brad,
does that book deal with charge robbing and port fuel injection? I may have to find a copy.
IMO, the old chev six may not rev, but it could make some serious torque numbers with a well matched turbo. Another approach may be to blow thru a TBI unit. Programming required! There are different accelleration enrichment values needed, because of the wet manifold. I would think you'd need to crank it up, compared to port EFI.
Thanks,
MV

If you are looking for easy supercharger, then look at the turbine types such as Paxton, Vortech, procharger, etc vs the positive displacement versions such as magnacharger, eaton, etc. The turbine chargers have the compressor side of a turbo with a gearbox on the input side driven off of the crank pulley.

Using a Turbo on an I6 is not new, I see a large number of 194/230/250/292 turbo exhaust manifolds on Ebay and other web sites, however not the 216 or 235. I am not sure that the 216/235 would have enough oil pressure to make the turbo live.

depending on your compression ratio, you may want to stay relatively low on boost anyway, say between 6 and 12psi unless you are building a boost engine from scratch

In either event, you will want to go with fuel injection over carburation for tuneability.

just my $.02

Scott

Go to Amazon.com and search on "Corky Bell". He has written some of the definitive books on boost, "Maximum Boost" and "Supercharged". Your search will also give you books that use him as a reference.

You can actually interact with the Cork-monster online. He hangs out at the Miata.net forum in the forced induction motor section. That's his "bag", turbocharging Miatas. I agree with 4onthefloor, if you can fuel inject it, you will have a lot more control over the fuel and timing, and that's what will keep the engine together and not go blooey. I run a system that he engineered most of the hard bits on my car, 240 rear wheel horsepower from a 97 cubic inch motor, still streetable and docile until you squish the right pedal.

4onthefloor,
I would be interested in more data on the injection system for a 235. IE, whats available, cost, supplied ect. How about an e-mail plz?
dgerth
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