Chevy 235 I-6

[mwskopf]

Hello all -
First post.
I have a 51 Chevy 1/2 ton pickup with an inline 6 235. I would like to EFI it and possibly turbo it. However, some of you may know that the cylinder head has siamesed intake ports - for 3 intake ports total. Would it be difficult to program the MS to force one injector to operate "double time" for the two cylinders?
Also, what are the different options for supplying the computer with timing with this engine?
I saw the crank pulley mounted trigger wheels on the site and was wondering if this was the best way to go. It seems like a person could acquire timing from the distributer some how. There is a good chance that I am beating a dead horse here, but I figured I would go ahead and post w/out reading archives first.

Thanks
Mark

[kjones6039]

IMHO......

The old stove bolt 6 would be a fun (and practical) candidate for efi.

3 injectors, batch injected with something like EDIS6 and voila!

Sounds like a good project to this old guy!!

Ken

[mwskopf]

Thanks for your reply Ken,
I need to do a lot more homework on the subject, but for now I am just beating around some ideas. Keeping the I-6 would definitely be more unique, but I am also thinking about one of those new LQ4 6.0 Chevy truck engines.
I know which one would make more HP/$.
In regards to the EDIS 6 that you mentioned, I gathered that you this in conjunction with the MS? I guess I thought the MS took care of all of that. But again, I need to read up some more.
Anyway,
Thanks again
Mark

[kjones6039]

In regards to the EDIS 6 that you mentioned, I gathered that you this in conjunction with the MS? I guess I thought the MS took care of all of that. But again, I need to read up some more.

MS certainly can take care of the vr sensor signal for an EDIS without using the EDIS module! In my case I prefer to use the module with my setup because it only requires saw/pip signals to/from the MS unit. If one of those fails the module still provides "limp mode" independently from MS.

Just my preference only.

Ken

[kholman]

mwskopf: There is an MSEFI user who has installed on an inline 6 in a 50 Suburban. His username is 1950ChevySuburban if you want to look him up.

[mwskopf]

Thanks for the info guys.
Mark

[ca434sbc4]

Mark,

We just did a TBI conversion on a 250 inline at the inliners convention in texas.. The 235 would be the same amount of work.

We used a pertronix conversion to trigger the MS2, with more time we could have triggered the coil from the MS2 - no real need for a crank trigger unless you want to lose the distributor.

www.inliners.org

A video was taken of the conversion and should be up soon.

[sundie]

I have a 51 Chevy 1/2 ton pickup with an inline 6 235. I would like to EFI it and possibly turbo it. However, some of you may know that the cylinder head has siamesed intake ports - for 3 intake ports total. Would it be difficult to program the MS to force one injector to operate "double time" for the two cylinders?

Sorry if i'm a bit late to the party, but...

I'm not entirely sure this question makes sense.

You have two choices, either TBI (throttle body injection) which is the simplest; you basically just replace the carb with some sort of TB with an I in it.

Or, if you *really* want to do port injection, you could use three injectors after plumbing them into the intake - but IMHO this is a lot of work for not much reward (except cool factor) in your case.

The reason your question doesn't make sense is because it doesn't matter how many injectors you're using (with a few caveats for certain conditions). Your motor requires a certain amount of fuel: let's arbitrarily call that "120 units".

If you're using a single injector, it must be able to supply 120 units by itself.

If you're using three injectors, they must be able to supply 120/3 or 40 units each.

If you're using six injectors, they must be able to supply 120/6 or 20 units each.

See why i don't get your question? You just size/number injectors to what you need.

Also, what are the different options for supplying the computer with timing with this engine?
I saw the crank pulley mounted trigger wheels on the site and was wondering if this was the best way to go. It seems like a person could acquire timing from the distributer some how. There is a good chance that I am beating a dead horse here, but I figured I would go ahead and post w/out reading archives first.

Probably the *easiest* method would be to keep the points, and pull the cycles off the coil, and run MS in fuel only - at least initially. Low cost, and less things to worry about.

The next step after that would be to obtain a distributor with a hall sensor, and run that to the MS, and have it do the ignition timing. A little more cost, but much better adjustability.

Typically, you'll only use a trigger wheel when either a: you don't have a distributor, or b: you want to run very high rpms and still have a good idle, so that you can have a larger timing adjustment. Distributors by their nature limit the amount of timing you can add/subtract by the arc of their pickup. I don't think you're going to be swinging that I-6 past 7k, so you'l be fine with the distributor, yes?