Jfrahm

Hi all,
I'm getting a used 968 motor from Scott Gomes to put in my 1990 S2 Cab, so I'm collecting information on what I'll need to do to perform this swap. I wonder if anyone can help with some details?

I'm getting the motor, intake, exhaust, clutch, flywheel, bellhousing, torque tube, DME, MAF, fuel rail, and wiring harness.

What I don't know is what modifications to the DME wiring I'll need to do. I believe I have to do something to the tach wiring? I also read about a white wire on pin 14 getting jumpered to something?

Does anyone have a DME pinout (or diagram) for the 968? I assume the S2 diagram is in the .pdf manuals but I haven't looked.

Sometimes I wonder why I'm taking apart a great running car to do this, but once that variocam engine is in there it should be pretty cool.

-Joel.

Danno

Gotta buyer for that old S2 engine???

Tye

You can contact Mike Wilkes with Memphis MotorWerks at (901) 757-1009 or mikewilkes@memphismotorwerks.com. They just put a 968 motor into a 944S that had thrown a rod (OUCH!). He can give you some insight into what flywheel/clutch will work along with wiring harness related issues. Good luck!

Tye
89 S2

wjk_glynn

See <a href="http://forums.pelicanparts.com/showthread.php?s=&threadid=82509" target="_blank">http://forums.pelicanparts.com/showthread.php?s=&threadid=82509</a>

Karl.

Jfrahm

Thanks for the info! I'll have to post to that thread on Pelican and maybe email Mike.

I understand that I have to use the 968 flywheel, bellhousing and torque tube in order to get the right signals to the 968 DME. Then you need the 968 torque tube, which is shorter to allow for the longer bellhousing.

I'm not sure yet if my S2 headpipe will bolt to the 968 exhaust headers, or if I can hook the 968 MAF to my S2 airbox (with a little custom tubing maybe?)

I thought about trying to do the swap with the S2 DME, which would require a custom box to control the variocam. I'd also have to use the S2 MAF (or an aftermarket one) and maybe a few other S2 bits, and an S2 chip for more RPMs. This might be cheaper (No 968 DME or torque tube needed) and would retain my new S2 clutch, but Scott put a package together for me that should be cleaner and better in the long run. The downside is that I don't have a diagram for the 968 DME yet to deal with the tach hookup and other little wiring issues alluded to by others.

I don't have a buyer for the S2 motor yet, I suppose I ought to find one while the motor is still in the car and running so a buyer can evaluate it. It might be best to sell it as a complete upgrade package. Maybe less $ than selling it piecemeal but easier to sell one package than four or five seperate parts.

-Joel.

Olli Snellman

Good you have a whole package (all the 968 goodies)I suppose S2 DME just won't work with Variocam engine.Also S2 does not have MAF, it's good old AFM as it is in every other 944 model.Why you will go to MAF route anyway? MAP systems can be installed also to a n/a engine.Ask from Danno/Guru Racing and i suppose Tim/SFR can offer it too.

Tabor

[quote]Originally posted by Olli Snellman:
<strong>Why you will go to MAF route anyway?</strong><hr></blockquote>

The 968 came with a MAF. I assume he is using the stock one.

Olli Snellman

[quote]I'd also have to use the S2 MAF (or an aftermarket one) <hr></blockquote>

Then why he wrote that ???
Somehow i figured it out he's missing the 968 MAF.

trebor_quitman

Wasn't there an old excellence where this procedure was done? I'll check Sunday when I get home...

Tabor

Olli,

My mistake.

Jfrahm

Sorry, I was using 'MAF' to describe the S2 air meter incorrectly. The new motor is coming with the 968 meter, which I'm planning to use. When I was thinking about using the S2 DME I thought I'd go with an aftermarket air meter rather than the stock S2 one, but now that I have the whole package I don't have to.

-Joel.

wjk_glynn

[quote]Originally posted by Roberto:
<strong>Wasn't there an old excellence where this procedure was done?</strong><hr></blockquote>

The Excellence issue which had the 944S conversion to 968 motor was #99, 02/2001, "Second Wind" - Installing a 944S2 engine into a 944S

Karl.

Jfrahm

Thanks! I haven't had any luck yet finding a copy of that article. If someone has it handy, can you look to see if it has details on the 968 DME wiring modifications?

My plan at this point is to do the following to the 968 motor:
change the belts
check the rollers
check the water pump bearing
change the clutch disk
check the T/O bearing and pilot bearing

change anything that looks suspect.

The motor mounts are new, so I got that going for me. Which is nice.

I plan to install the motor from the top, with the hood removed. I'll probably pull the intake to ease installation, but I'm not sure if I need to install the motor with the exhaust off. I belive if it's in the car the right motor mount has to be undone and the engine lifted on that side to install the exhaust, so it's a tight fit, but it might be OK with the motor hanging from a crane, I can roll the motor a bit for clearance.

I was thinking of having the headers jet hot coated, or wrapping them to reduce heat (which would also be better for the right engine mount.) I also thought of header wrapping the engine mount as an additional heat shield.

Can I pull the motor without pulling the A-Arms and front subframe? Or would it be easier to just pull the subframe too?

-Joel.