Short stroke 3.2

[carson911s]

New engine ready to go in.



It's in. Hopefully will fire up for the first time today.

[kenikh]

8 year thread revival! A record?

[carson911s]

Yes, a very old thread.

None of my 3 children were born when the last post was made.

It seems the 3.2 SS has fallen out of fashion maybe ?

The engine is alive and is being given a run with some basic mineral oil to seat the rings before I pick her up tomorrow.

[kenikh]

Originally Posted by carson911s

It seems the 3.2 SS has fallen out of fashion maybe ?

Out of fashion? I'd beg to differ. This seems to be the 'de rigeur' motor of choice by those in the the know, the last 2 - 3 years. From jpnovak's insane EFI 3.2SS to Carrerax's recent 3.2SS, this motor has really come onto the scene as the "common man's racing motor".

You can make more power for less money with a 3.2SS than just about any config out there. It's just hard to find the build threads becuase Pelican's antiquited vBullletin based search engine won't parse character search queries or punctuation.

[carson911s]

Good to know that I am in fashion without realising it !

I was going to go with EFI using a 3.2 manifold as the base but the budget started to get strained (I am a cheque book mechanic ...) so the CIS stayed on.

The plan is next year when funds allow (those 3 children cost a lot more than a 911 to run) to go down the EFI route.

Still not quite sure what to expect from the engine. Mike says it feels like a much torquier beast than the 2.7.

Exciting times while waiting to be reunited with her tomorrow.

[kenikh]

What cams?

[carson911s]

It has the same cams that it had as a 3.0 litre CIS ... so conservative I guess.

Maybe when I go EFI I should look at something more aggressive in that department ?

I'm still a bit vague on what horsepower to expect. I'd like to think that it's now somehwere between 230 and 240 ?

[kenikh]

Those CIS cams are going to hurt HP, but will pull like a train. You'd have been better served with CIS friendly cams with a little more life. At this displacement, 964 cams would be VERY fun and make more power on top. I think 240HP is a bit of a reach on these cams, as torque will be huge and low, but run out of steam very quickly. You might hit 230HP, but it will feel rocket powered.

[carson911s]

Thanks for that Kenik.

I'm happy if I am hitting something circa 230 at the moment.

Sounds like 964 cams will have to go with the EFI next year.

My mechanic, Mike, was talking about that at about the time I realised Christmas was coming and it was time to stop spending $ on myself so the old CIS stayed on top.

[fred cook]

I am about to do an SS rebuild on my SC 3.0 engine, only I am going to 100 mm on the bore using Mahle pistons and the LN 100mm slip fit cylinders. I also have a set of race prepped 3.2 heads that have been twin plugged. Will probably use the 964 cams and early CIS for fuel. Am planning on using the Electromotive XDI direct fire ignition. With this set up, I am not looking for absolute max top end horsepower, but mainly for a very strong mid range torque curve. Who knows where this will end?

Good luck to all with engine projects underway!!

[Vin-barrett]

Fred , have you started a thread on this build?
I have been thinking of going for the same 3.3 SS w/3.2 heads config lately instead of doing a 3.6 swap. I'd like to follow your progress

Originally Posted by fred cook

I am about to do an SS rebuild on my SC 3.0 engine, only I am going to 100 mm on the bore using Mahle pistons and the LN 100mm slip fit cylinders. I also have a set of race prepped 3.2 heads that have been twin plugged. Will probably use the 964 cams and early CIS for fuel. Am planning on using the Electromotive XDI direct fire ignition. With this set up, I am not looking for absolute max top end horsepower, but mainly for a very strong mid range torque curve. Who knows where this will end?

Good luck to all with engine projects underway!!

[CBRacerX]

You are going to love this engine. Torque that just pulls like mad from very low on the tach. I would suggest getting some GE80 cams in there, a crank fire ignition and a set of 46mm Webers, but I am pretty old school The EFI will be a great upgrade.

P.S. love the color!

[brads911sc]

I was looking at the 3.2 SS pistons this past weekend... people generally going JE/Nickies at 9:5 compression for 93 octane pump gas?

[kenikh]

Originally Posted by brads911sc

I was looking at the 3.2 SS pistons this past weekend... people generally going JE/Nickies at 9:5 compression for 93 octane pump gas?

Single plug, yes.

[jsmithcds]

Originally Posted by brads911sc

I was looking at the 3.2 SS pistons this past weekend... people generally going JE/Nickies at 9:5 compression for 93 octane pump gas?

Same specs I have with 964 cams. Pulls great on the track and very drivable in town. Worth the $10k you'll stick into it if you don't do your own work???? That's your call.

Justin

[spydr32000]

Down here we are very lucky as we have 93, 95, 98 octane readily available which allows us much more flexibility in engine building and design.
Steves engine was basically a repair of an engine which ran a big end bearing, and as a result we just used the existing cams being the original '82 SC units with some resetting of timing. the pistons are 10.2:1 Mahle.
Had it been up to me of course i would have used Nickies and JE's.
It is feeling very responsive and strong even at this early stage. Looking forward to Steve's comments!

[brads911sc]

I am looking for Max torque at the low end. I dont track the car, so I was going to stick with CIS cams, the EFI i have (40 mm PMO ITBS) and add 98 MM 9:5 compression JE/Nickies. That the best set up? Willing to go 964 cams, but I dont live at 5k RPM's+. I live mostly 2-6k RPM's... so if it drops off at 6k, that is ok with me.. I do most of my own work so this will be alot less than 10k for me.

Originally Posted by jsmithcds

Same specs I have with 964 cams. Pulls great on the track and very drivable in town. Worth the $10k you'll stick into it if you don't do your own work???? That's your call.

Justin

[carson911s]

Well I drove it home tonight.

Limited to 5000 rpm while running in and wow, what an engine.

I can only say that if anyone is thinking of a 3.2 SS, just do it. It was accelerating strongly uphill in 5th ...

Many thanks to Mike at Spyder Automobiles. I could not be happier.

[jsmithcds]

Originally Posted by brads911sc

I am looking for Max torque at the low end. I dont track the car, so I was going to stick with CIS cams, the EFI i have (40 mm PMO ITBS) and add 98 MM 9:5 compression JE/Nickies. That the best set up? Willing to go 964 cams, but I dont live at 5k RPM's+. I live mostly 2-6k RPM's... so if it drops off at 6k, that is ok with me.. I do most of my own work so this will be alot less than 10k for me.

I intend to add PMO for some throttle respond and more torque on the low end. Some day The 964 cams come on at 4k and pull hard. Below that with the CIS still on the motor it pulls but your not going to blow the doors of a 4 cylinder with a little work.

It was explained to me by a professor of Porscholgy like this.

"We recently did a 3.2 SS with PMO's, Mod-S cams and the same CR you have that made 266BHP. It ran very hard."

"Huge difference between those cams,..................night & day. 964 cams are all done by 6K in a 3.2; Mod-S ones run from 4K to 7K"

Using 46mm PMO's in the above mentioned quotes.

[Carrerax]

Originally Posted by jsmithcds

It was explained to me by a professor of Porscholgy like this.

"We recently did a 3.2 SS with PMO's, Mod-S cams and the same CR you have that made 266BHP. It ran very hard."

"Huge difference between those cams,..................night & day. 964 cams are all done by 6K in a 3.2; Mod-S ones run from 4K to 7K"

Using 46mm PMO's in the above mentioned quotes.

That same Prof of Porschology told me about that motor and I also built one. RSR Pistons, twin plug (JB Racing...awesome!), Mod S, 46 PMO's (Spec'd by the Prof) etc. Cant wait to get it in the car!