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Posted by: Luke M Mar 29 2020, 06:50 AM

Thinking of getting a 3.2 or a 993 3.6. If using the factory 914-6 engine mount will I run into any clearance issues around the crank pulley area?

I know of a few other issues that I may encounter. For you 3.2 and 3.6 guys out there any words of wisdom before I jump into this?

Posted by: rgalla9146 Mar 29 2020, 07:14 AM

Never done it but understand pully has to be changed which elimenates
accessory drive ?

Posted by: Luke M Mar 29 2020, 07:25 AM

Hi Rory,

I just do not want to have to cut up a nice factory 6 mount. I have several different crank pulleys here that I could try out if need be. That would also change the fan ratio/speed too.

I'll send you a pm later on the other stuff we talked about.

Thanks,

Posted by: Mark Henry Mar 29 2020, 08:01 AM

AC pulley won't work without major mods, find a single pulley with the same fan drive size. IIRC any air cooled pulley will work but there's a few different sizes of the crank pulley and then there's a couple different sizes of the fan pulleys.
Do a search on pelican, there was a list of the different sizes.

I went with the SC sized pulleys on the right , I can just sneak the belt past the tin, would be a PITA to change the belt in car without my big access hole.

Posted by: mepstein Mar 29 2020, 08:25 AM

Can't you just put the double pulley on a lathe and knock off the smaller one?

Posted by: mb911 Mar 29 2020, 08:30 AM

Yes..

Posted by: IronHillRestorations Mar 29 2020, 08:48 AM

Pretty sure the lower pulley on a 3.6 is also harmonic balancer

Posted by: Steve Mar 29 2020, 09:20 AM

I took the single pulley off of my 2.7 and put it on my 3.2. I still have the double pulley off of the 3.2 in a box somewhere. I am using the rich Johnson Mount.

Posted by: bahnzai Mar 29 2020, 10:50 AM

Here is a 3.6 with a stock mount unmodified. As others noted, only room for single belt.
My conversion already had the stock mount installed. If I were starting from scratch, I would use the style Bob Saville or Patrick Motorsports offers. Looks much easier/quicker to drop the motor.

Posted by: mb911 Mar 29 2020, 10:58 AM

The problem with those above mentioned mounts is that it mounts the engine about 3/4" lower in the chassis thus making the seals not able to meet up.. Then you also can't use a stock style oil line set up.

Posted by: Mark Henry Mar 29 2020, 11:18 AM

I have my nose dropped close to 3/4" and I think my seals fit better. I have be sure to hook them over the tin edge when I install, but they stay perfectly in place.
I can't use the stock oil pipe as I made my own mount which is much like a RJ mount.

Posted by: Luke M Mar 29 2020, 11:23 AM

I currently have a 131 mm crank pulley and stock 6 upper.
With the 131 mm installed it's tight to swap out the belt.
I don't think I would be able to get one on if needed. Maybe with the fan access hole cut into the firewall. Yeah I know some would say bad idea.. I also have a 3.2, 2 belt and single pulley here. I'll have to find them so I can test it out. I believe the 3.6 engine mount is a totally different style mount ? I'm also gonna stay with the factory 6 mount not an aftermarket unit.


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Posted by: JOEPROPER Mar 29 2020, 12:01 PM

Sorry to go backwards, but which above mentioned mounts are you referring to Ben? PMS / NARO RACING? or RJ or factory 6?
Also excuse my ignorance... thanks.

Posted by: mb911 Mar 29 2020, 12:24 PM

Sorry naroscape and pms..

Posted by: rgalla9146 Mar 29 2020, 01:40 PM

I agree with Mark that the second groove can be machined off the original pulley.

Also,there should be a known correct distance from the
engine shelf down to crank centerline.
In my experience mechanics either don't bother to engage the seals to the engine tin
or it tends to get loose on its own. It's an important barrier.

Posted by: gms Mar 30 2020, 09:05 AM

Luke, you could use a Clewett crank pulley?

Posted by: Luke M Mar 30 2020, 02:22 PM

I'm waiting to hear back about a 993 3.6. If it doesn't work out I'll go with a 3.2.

Any one have a late 84-86 915 trans converted with Bott's 916 kit all done that they may want to part with?

Posted by: mepstein Mar 30 2020, 02:35 PM

Didn’t LarryM have the trans and kit for sale some time ago.

Found it - http://www.914world.com/bbs2/index.php?showtopic=338842&hl=Martin

Posted by: Steve Mar 30 2020, 04:33 PM

Maybe also check with http://www.tangerineracing.com/
They build quite a few of them and had one for sale awhile back

Posted by: RiqueMar Apr 6 2020, 09:32 PM

Should you change your mind, and decide to use the actual /6 mount, I went that route, and only had to slightly modify the cone.
http://www.914world.com/bbs2/index.php?showtopic=88955&st=680


Hope this helps and best of luck!

Posted by: larryM Apr 6 2020, 10:06 PM

i did 3.2 with my oem -6 mount - no problems - you can't use a 3.2 AC dual pulley - must use single non-AC pulley (i had 2 3.2's - one was AC the other non-AC, so i just used the non-AC pulley - iirc any older 911 single pulley should also work)



(p.s. thanks for buying the Bott kit!)


p. p.s. - for all: i have an oem -6 mount FS

Posted by: Luke M Apr 7 2020, 07:01 AM

Thanks for the input guys. The 3.6 did not work out so I went with a 3.2 engine instead.
I have a single belt pulley from a 3.2 here. Once the 3.2 get to me I'll mess around with the mount. I believe it should work just fine.

Thanks Larry for selling me the Bott kit.

Posted by: Lg914 Jun 8 2020, 06:12 AM

The naroescape And Patrick motorsprts mounts are different In that they install the engine At different hights. Patrick motorsport Mount puts the engine about an inch higher than the naroescape one.

Posted by: mb911 Jun 8 2020, 06:55 AM

That is good to know.. Stock oil line may fit then..

Posted by: John Jun 8 2020, 03:09 PM

The 3.2 stock A/C pulley is easily cut off. On one conversion that I did, I used the 914-6 mount. On the others, I used modified 911 mounts with much shorter arms. Been doing it that way ever since. Of course, my front engine tin is a bit different than the stock 914-6 piece to accommodate the modified 911 engine mount.

I seem to recall that some of the later air cooled 911 engine cases are slightly different where the 914-6 mount and the 911 engine mounts bolt on. I think they added a threaded hole at some point and early mounts can be used if a stud is installed in the correct hole. The later mounts used the other threaded hole. (It's been a while since I've converted one, so perhaps I'm dreaming this up.)