2.7 to 3.2 conversion questions

[baruch mor]

now that i ordered a 1988 3.2 engine n a g50 transmission to my 76 targa - have a few questions:
1. do i need to change the fuel pump?
2. will all the gauges work after the setup or do i need special modifications for them?
3. what about engine n gear rubber mounts? should i replace them? do i need a 76 ones or 88 ones ?
4. what fuel is better - i can get here 96 leaded or 95 + 98 unledead (used to put 96 leaded on my 2.7 L )
5. what o-rings n seals and any other things u suggest i should replace when the 3.2l engine n the g50 still outside?

thanks

[pookie]

I didn't go G50, I stayed with the 915 but to answer your questions:

1. I swapped the 3.2 pump into mine.
2. I had an aftermarket tach already, but all my gauges work except the oil pressure gauge. I've still not sorted that one out. I've got my stock tach that I've been meaning to try.
3. Not sure what an "engine n gear rubber mount" is. If you are talking tranny/motor mounts, no, they are the same for all years. It would be an easy to do since the motor is already out.
4. Unleaded only. I run 93 in mine. I have a Steve Wong chip tuned for 91, but I run 93.
5. Some others will probably chime in, I think it is the oil pressure sender, or oil temp sensor, it is located on the back of the motor near the flywheel. I'd swap that when its out cause if not you have to do a drop to get to it.

Good luck. It's fun when you get it done. See below \/\/\/\/\/\/\/\/

[jpnovak]

the G50 will not work in your 76 chassis without major modifications. This means replacing the clutch actuation (G50 is a hydraulic clutch), welding an entire torsion tube, swapping major rear suspension components (torsion bars and spring plates) and a few other things.

Just bolt the 3.2 to your 915. cut a notch for the reference timing sensor.

btw, follow this thread. it explains all for your 2.7 to 3.2 conversion.
http://www.pelicanparts.com/MotorCity/marcesq1/

[cubby911T]

Baruch,

I used the CIS pump from my '77 as I think others have done. This is not recommended in "Marc's 3.2 conversion" instructions, but it seems to work okay.

The tach, speedo, and oil level gauge should work fine, but for the oil temp and oil pressure gauges, you will either need to replace the associated sending units or else the gauges themselves. Sending units will be the less expensive route and then you know you'll have nice new senders in place.

All this stuff is covered in Marc's conversion instructions as referenced above. Sounds like you're off to a good start by finding the motor! Good luck and keep us posted!

[baruch mor]

Originally Posted by jpnovak

the G50 will not work in your 76 chassis without major modifications. This means replacing the clutch actuation (G50 is a hydraulic clutch), welding an entire torsion tube, swapping major rear suspension components (torsion bars and spring plates) and a few other things.

Just bolt the 3.2 to your 915. cut a notch for the reference timing sensor.

btw, follow this thread. it explains all for your 2.7 to 3.2 conversion.
http://www.pelicanparts.com/MotorCity/marcesq1/

jamie
i allready bought it and i realy want it inside my 76 could u please explain more
what is involved with it and the parts i need to buy cause the engine still in florida and i better buy all the parts needed n ship them over with the engine.

thanks

[stevemfr]

Originally Posted by pookie

2. I had an aftermarket tach already, but all my gauges work except the fuel pressure gauge.

Fuel pressure? You mean oil press, right? The newer guages have a smaller scale - just reuse your old sending unit.

[stevemfr]

Originally Posted by baruch mor

jamie
i allready bought it and i realy want it inside my 76 could u please explain more
what is involved with it and the parts i need to buy cause the engine still in florida and i better buy all the parts needed n ship them over with the engine.

thanks

Unless you are prepared to do tons of work and spend $$, follow Jamie's advice. If you search here on the forums on "G50 conversion", you'll find all sorts of info.

Here is a good summary: Pre-'87 G50 conversion parts list from donor '87 chassis?

The Carrera 3.2 came from the factory with a 915 the first 2 years and is more than capable of handling even a mildly modified 3.2. I would spend money on making my 915 a little stronger (plenty of info to be found here too) and poss adapting the gearing - although with the shorter 2.7 gears you will be quicker around the bottom - or just pick up a 915 from a 3.2.

[pookie]

stevemfr--you are right I meant oil pressure gauge, I edited it to show that.

I've had the 3.2 mated to my 915 for all of about 2K miles with no problems.

[PcarPhil]

Originally Posted by baruch mor

now that i ordered a 1988 3.2 engine n a g50 transmission to my 76 targa - have a few questions:
1. do i need to change the fuel pump?
2. will all the gauges work after the setup or do i need special modifications for them?
3. what about engine n gear rubber mounts? should i replace them? do i need a 76 ones or 88 ones ?
4. what fuel is better - i can get here 96 leaded or 95 + 98 unledead (used to put 96 leaded on my 2.7 L )
5. what o-rings n seals and any other things u suggest i should replace when the 3.2l engine n the g50 still outside?

thanks

1. Not required, but not a bad idea either.
2. The oil temp and oil pressure senders and/or gauges will need to be changed. Use either a 2.7 gauge and sender or a 3.2 gauge and sender. All other existing gauges are fine.
3. This would be a good time to freshen up the engine and trans mounts. If you stay with a 915 transmission then a good upgrade is to buy 4 Wevo mounts. 2 for the engine and 2 for the trans. The G50 mounts are different.
4. I'd use unleaded. I'd also email Steve Wong and have him burn you a DME chip to correspond with the fuel you're using.
5. All external easy to change seals on the engine. Valve cover gaskets, breather gasket, etc.

I'd strongly recommend rethinking the G50 conversion. It's not a cheap or easy conversion...but...it would be nice when done! A properly set up 915 is very nice.

[avt007]

Subscribed- I have a 2.7, and I'm thinking of a 3.0 or a 3.2.

[kootsi]

Call me, and I can tell you an easier way to make the G50 fit into your 76 911 chassis than replacing the entire torsion bar tube. We have done a few conversions and it is not that difficult.........you personally might not be able to do the swap, and have to have some help, but I can tell you how to do it, and you can take it from there. I can also send you pictures of the conversion
Don Istook (817)332-6547
ISTOOK'S Motorsports

[sjf911]

Originally Posted by kootsi

Call me, and I can tell you an easier way to make the G50 fit into your 76 911 chassis than replacing the entire torsion bar tube. We have done a few conversions and it is not that difficult.........you personally might not be able to do the swap, and have to have some help, but I can tell you how to do it, and you can take it from there. I can also send you pictures of the conversion
Don Istook (817)332-6547
ISTOOK'S Motorsports

Now you have me interested. Can you elucidate further for the rest of us?

[baruch mor]

thanks for the offer don. i pm-ed u. i am going to use my mechanic for that job
but porsches r rare in my country. could u post here some photos and parts list to show him please?

[kootsi]

You do have to have a torsion tube from an 87-89 911, but you section it. We measure and cut out the old tubbe, make two steel colllars, section the donor tube, position it and weld it in. We then make braces, just like the factory mount has, to supplement the strength to the chassis for the new remade tube. We have a spit that we can rotate the cars 360 degrees, which makes it much easier, but it can certainly be done on floor jacks or with a lift.

Any questions?...feel free to call me at the shop at (817)332-6547. We have done several torsion tube replacements and it is not that hard.
Don Istook
ISTOOK'S Motorsports








two

[MotoSook]

Nice work, Don.

[RWebb]

nice, but is it more trouble/cost than coil-overs?

[baruch mor]

thanks for the pictures , here is a few more questions

Originally Posted by kootsi

You do have to have a torsion tube from an 87-89 911, but you section it - what do u mean by "section it" ? .

We measure and cut out the old tube, make two steel collars, section the donor tube, position it and weld it in. - how do u know the acurate place for the collars? do u take them from 87 model or make a new ones yourself? if you customize them yourself could u give me the specs of the collars ?

We then make braces, just like the factory mount has, to supplement the strength to the chassis for the new remade tube. - what do u mean "make" braces? do u customize them yourself? could u supply the specs i need?

We have a spit that we can rotate the cars 360 degrees, which makes it much easier, but it can certainly be done on floor jacks or with a lift.

Any questions?...feel free to call me at the shop at (817)332-6547. We have done several torsion tube replacements and it is not that hard.
Don Istook
ISTOOK'S Motorsports








two

[baruch mor]

Originally Posted by RWebb

nice, but is it more trouble/cost than coil-overs?

from what i have heard from eibellperformance if u go with the coilovers u have to cut your transmision too and its not a simple job

[safe]

Originally Posted by Kaefer

2. The oil temp and oil pressure senders and/or gauges will need to be changed. Use either a 2.7 gauge and sender or a 3.2 gauge and sender.

I know the sender is different, 5 vs 10 bar.
But whats with the temperature sender? Is there really any difference?

[David Borden]

subscribed...