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G50 in Esprit


Spin

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Hello :construction:

This is an uprated G30.03 with 2-way and engine is a 358ci cup engine.

1statemptwithwaterpump.jpg

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Once you do away with a mechanical water pump the fit isn't too bad.. what I like about a more old school sbc is it's simple wiring and if you want to increase power/torque then get a biggr carb and re-set the advance and gaps.

If I could rewind tho I would look out a DF-X, ZR1 or a n/a version of the 3.5 v8 (high flow heads etc) but no denying lots of charm with small blocks.

Mine is for sale in fact.. I think.. :innocent:

It's alive.. alive!!!..

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There is a company here in Boulder Colorado that will help make kits to fit a G50 in different cars...

http://www.gboxweb.com/company.html

http://www.gboxweb.com/kitcar-1-1.html

Kit Car Builders Take Note:

GBox Is Your One-Stop Shop.

While we specialize in Porsche motorsport and street applications, it became obvious that we should do what we could to help educate and support the kit car builders, given that more custom-built cars are using Porsche transaxles.

GBox will put together very comprehensive and complete packages in an effort to aid you and save you time.

What we have done, in an effort to make the process easier, is to include everything needed to complete your project.

No more wrong parts, no more quesswork. Our experts are here to assist you as much or as little as you require.

It has been a pleasure to be a part of so many beautiful car builds. We look forward to providing the same services to many more in the years to come.

Not everyone is a transaxle expert;

that's what WE are here for.

When using a rod-shift gearbox (such as a 993 or 930 transaxle) with a cable-shift linkage, shifting into reverse requires a great deal of effort due to the lesser leverage of the cable system. GBox modifies the internal reverse gate to lessen the effort required: we do this during a rebuild of a transmission intended for a kit car installation. The difference is substantial.

Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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Thanks for the info guys. :cheers: I have recently completed a conversion on my Triumph Stag: with 5.7L Chevy LS1, Turbo700 auto, BMW LSD, B&M Mega Shifter etc etc and I am very happy with how it has turned out and how it performs. I am now thinking of doing my 1981 S3 Esprit. I have access to a G50 and of course there are no shortages of LS1's here in OZ. So yeah was hoping someone had done a similar conversion so I could share some info. The Stag conversion was the first in the world (from what I can find out) with that particular conversion combination. It is much more difficult when you have to do it all first time yourself! :ouch: M Blur - yours looks like a major rebuild project! Would be a shame to sell it now? although I know from experience how much it costs to do conversions like this and you soon run out of $$$. I will search the forum to read up on yours as I am sure there will be lots of useful information I can use. Do you know of any other G50 conversions?

Vulcan Grey - thanks for the links, I will look into what they have to offer. The dollar is very good at present so could bring some parts in! :yes: Thanks Spin

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Is there a G50/Kitcar specialist in the UK? I need to have a G50 gearbox installed in a Pantera GT5....

For the moments it has a sprint gearbox with Vmax close to 220kmh (140mph) this is no fun when travelling over the German highway (high rpm/low speed)

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whereabouts in Aus are you Spin?

I'm doing an S3 at the moment which will eventually have a heart transplant, LS1 or 2 with the Audi box (the plan so far, long way in the future). Have you taken a look at Hilly's build thread? He went Audi v8 and box, do you think the porsche box is much better? what sort of price are they in Aus?

I'd be very interested in your plans as they seem similar to mine...

cheers,

simon

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Hi Simon, I am in Perth. Yes I have read Hillys thread. I think there might be less engineering fitting a G50 than an Audi box, but having said that there is still a lot of fabrication to do. I know the G50 box can handle the power and I have access to one. They are not cheap and range from$3K to $8K from my research. I will be in Tassie (Deloraine area) for 6 weeks from November 1! :) Spin

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Is there a G50/Kitcar specialist in the UK? I need to have a G50 gearbox installed in a Pantera GT5....

For the moments it has a sprint gearbox with Vmax close to 220kmh (140mph) this is no fun when travelling over the German highway (high rpm/low speed)

Have you tried

http://www.rbttrans.com/about.html

for a taller overdrive? They bought the rights to your gearbox.

And Spin if you looking to spend that sum what about a kitted UN1. Both GTO and Albins can supply them. They have been popular with the GT40, Lola and other replica builders. Plenty of bellhousings for Chev to UN1 available too.

GTO at the moment also have a used 6 speed dog kit that seems good value and there'd be little or no tax bringing it in as it will be classed as secondhand.

DanR

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Hi Spin,

If you can make it down south drop in, it would be interesting to talk about your plans. I've PM'd you contact details. If I wasn't so broke at the moment I'd love to track down a motor/gearbox combo from the states, what with the strong dollar and all. I like the look of the work done for the guy (can't remember his name) who's planning an LS4, nice adaptor plate, I'm sure it wouldn't be hard to find a 'one stop shop' of somewhere willing to source motor, gearbox and fab adaptor plate/starter motor then ship the lot over here.

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Hi Simon, I am in Perth. Yes I have read Hillys thread. I think there might be less engineering fitting a G50 than an Audi box, but having said that there is still a lot of fabrication to do. I know the G50 box can handle the power and I have access to one. They are not cheap and range from$3K to $8K from my research. I will be in Tassie (Deloraine area) for 6 weeks from November 1! :) Spin

Hi Spin

I would be interested to hear why you think there will be less engineering effort required to fit a G50 into an S3 over an Audi box????

Agreed the G50 has a higher torque rating, but as far as I can figure out you still need to tackle :

1) gear linkage

2) inboard brakes

3) exhaust mounting

4) gearbox/engine mounts

5) clutch/flywheel

6) drive shafts

7) speedo drive

You also have the issue of having to run the G50 inverted, this will drop the engine crank centre line in relation to the gearbox input shaft, you then have to deal with the engine cradle cross brace getting in the way which could mean a new sump.

Then on top of that lot you need to sort out the engine/gearbox adaptor plate (which the Audi engien/gearbox combo doesn't need), so I make that more effort, of have I missed something ??

Hilly

1981 S3 4.2 V8 6 speed (The Mutant)

Mutant V8 Conversion Thread

Knowledge is power .................... apparently.

 

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  • 2 weeks later...

Hilly makes good points.

If you do go down the G50 route then I have a 5-speed Gardner Douglas T70 rod linkage sitting there unused, supplied new by GD - it's designed to operate from the right of the driver ala GT40 (or inded T70) style.

Adapter plates are cheap enough from the US where chevy to G50 conversions are much more common.

Clutch would be a usual Sachs affair.

speedo drive would be a Porsche pick-up and gauge.

Easy way is to sign up tot he GT40 forums - lots of tips and advice on there.

JB

I'd give Gardner Douglas a try..

After that then no one better than Kev @ GTO Engineering who knows my car and has had Ultimas and Porsches.. transmission specialist of high repute.

JB

It's alive.. alive!!!..

altimeter.gifsai.gif

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Hi Spin

I would be interested to hear why you think there will be less engineering effort required to fit a G50 into an S3 over an Audi box????

Agreed the G50 has a higher torque rating, but as far as I can figure out you still need to tackle :

1) gear linkage

2) inboard brakes

3) exhaust mounting

4) gearbox/engine mounts

5) clutch/flywheel

6) drive shafts

7) speedo drive

You also have the issue of having to run the G50 inverted, this will drop the engine crank centre line in relation to the gearbox input shaft, you then have to deal with the engine cradle cross brace getting in the way which could mean a new sump.

Then on top of that lot you need to sort out the engine/gearbox adaptor plate (which the Audi engien/gearbox combo doesn't need), so I make that more effort, of have I missed something ??

Hilly

Hi Spin,

Totally agree with hilly on this one, He has pointed out some very good points, To be honest the Audi v8 option is probably the best way to go, For the price you would pay for the g50 box itself you could pretty much pay for a fair bit of the conversion, As for power hilly runs the 4.2 that was 300bhp out the box normally aspirated, not to mention custom ecu, not cats, decent exhaust design so it will have a good few extra ponys added to that figure, Also the engines are cheap and plentyfull same as the gearboxes, Also you can put the extra effort in and work the heads etc.

Just look at the 034 MOTORSPORT website they sell plenty of goodies for these engines, Also the five cylinder audi turbo they have just got 750bhp out of one of these babies. The package gets you a fairly easy conversion that powerfull, fairly cheap and reliable. The audi gearlinkage can be even simpler take at look at the lambolounge at the audi gearbox conversion.

Hell im on my second audi v8 conversion because i like the set up so much, Also think the audi v8 personally sounds better!

Regards danny :rolleyes:

A

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  • 4 weeks later...

Sorry guys been away in Tasmania for the last 6 weeks and have not been in contact with the outside world etc.

Of course not having done either the audi or g50 conversions I cant be sure which would be more difficult, I will take your word Hilly given you have done the Audi conversion. :yes:

I guess I was thinking more along the lines that the G50 conversion has been used in lots of different cars and in Australia, from what I can tell getting hold of Audi V8s and transaxles would be expensive and hard to find and in addition, there would be very few people with experience on Audi conversions of any kind here in Australia. Thats my understanding. I think things like BMW and Audi parts are relatively inexpensive in the UK but not so here. Whereas we do have access to cheap Chevy LS series V8's here in Oz. So yeah, one thing is for sure either option will cost lots of money and engineering fabrication! Spin

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