Why I can't put my 2.0 put on to a 1750 tranny

[davbert]

Hello all,



Much to my disappointment, I found out lastnight that I wont be able to use my 1750 gearbox with new 2liter motor. I was planning to reuse my old 69gtv gearbox with a modified 2 liter bellhousing to mate to my new motor. The 1750 bellhousing has a window for the 3 shift forks to poke through. One of these forks also activates the reverse lamps.

I modifed my 2.0 bellhousing by milling a window out for the shiftfork travel. What I didn't relise is untill I pulled the BH of the tranny is that the 1750 window has land around this area to keep the gearbox oil from seeping out. The 2.0 BH dosent have a window so it does with out the landing.

Well my next plan is to find a used 2.0 gearbox and bellhousing just to get the car running. I am wondering if 2.0 gearbox will mate right up to my 1750 driveshaft? I recall looking into changing to a LSD rear axle and remembered you must change the driveshaft also. The 2.0 are larger.

I counted 131 tooth on my ring-gear flywheel. I believe the 72-74 are 130 tooth. What year staters are for the 131 tooth RGear??


regreting build a 2.0liter....should have modified my 1750


davbert

[PSk]

I thought the 1750 bellhousing would work with the 2000 motor ...

The 2000 motor conversion has been done squillions of times (much to my amazement as the 2000 motor is dull in comparison ... unless you are racing) ...

Pete

[AlfistiSA]

Flog the 2.0 motor on the net & with the proceeds, rebuild the correct motor for the car, a well built 1750, balanced, neatly ported & polished will be better than a stock 2.0 motor.

Matching number cars are always more desirable than mis-matched numbers.

My 0.02 Lira's worth anyway

Cheers
Greig
Sunny South Africa
Some 750's
Some 101's
Some 105's
Some others

[sprintgtc]

Hey Davbert,
Don't lose hope yet. What happened to your 1750 bellhousing? Pretty sure it will bolt right up to a 2L. There has been lots of talk about matching starters to flywheels on the BB. A search should answer your questions about starters & tooth count. Seems to me the flywheels changed in '75.

I put a 1750 in the Super, used the 1600 clutch set up and a later box. So anything can be done with some tinkering. I must admit, I'm a 1750 fan as well but 2L's aren't a bad choice.

Your driveline will bolt up just fine, all 105/115 from '56 to '94 take the same Giubo.

[davbert]

Don’t get me wrong I wished I would have stayed with the 1750 now. I wanted more power ( around 160hp) for track days and I thought the 2 liter would be better suited to that use (more torque and parts availability). I use to have 74GTV (also 71-1750 spider, modified 74 2000 spider and modidfied 79 sprint veloce) and I remember having a lot more punch out of the corners with the 2.0liters.


PSA and AlfistiSA,
Other than it arguably runs smoother and a better looking motor how is a 1750 better than a 2.0liter again??

I may keep my 1750 motor if I have room to store it and rebuild when the 2.0liter becomes tired.



Mike,

Yes, the 1750 bellhousing will bolt on to a 2liter block. The starter ring on my motor is a later 131 tooth 75-89 alfetta/spider. I believe 2.0 form 72-74 are 130 tooth and the 1750 flywheel is different. To the best of my knowledge the, 1750 behousing starter location is different than the 2liter.

The key difference on your Super is that you used a later gearbox witch doesn’t require a widow for the shiftfork clearance. What’s bellhousing and flywheel ring gear did you use for your Super.

I may join your club when I get back to the west coast. It looks like a bunch of guys that prefer to be on the track rather than polishing there garage queens. Mike, did you buy back that orange track GTV that you built for a costumer in the early nighties?


Thanks

davbert

[PSk]

Quote:

Originally Posted by davbert PSA and AlfistiSA, Other than it arguably runs smoother and a better looking motor how is a 1750 better than a 2.0liter again??

[sprintgtc]

On the Super, I used the 1600 flywheel (lightened) with the cable clutch and a two bolt starter. Your right about the box, you can go with newer, but not earlier. As long as you find the starter to match the flywheel, you'll be ok.
And i do still have the orange(ish) racerat.

[AlfistiSA]

A few pictures of that 750B in running order, would not go amiss..................I've got my 750B at work today, really runs well with the 1300 Veloce conversion, surprises more than a few people on the freeway whan I stay in the fast lane...........

How is the resto coming on the GTC ?

Cheers
Greig