Porsche 915 or G50 in Bugs ?
 

Anyone gots any Pic's of a Porsche 5 Speed 915 or G50 installed in a Bug?

Hi

Im doing a G50 now, lots of cutting. A 915 would be easier but not as effective.
http://www.clubvw.org.au/steve_carter.htm

Steve

see my site for a 915 installed in a 1303 chassis. Centre of torsion tube cut out to facilitate the engine & gearbox being positioned further forward than stock...

http://homepage.eircom.net/~veewrx

Thanks for the info. Just trying to do my homework to see what I'm getting into before I go there.

You mates are really hacking and a cutting, must be determined to get those Porsche Boxes squeezed in those horns.

Steve you mentioned on your Website that you had to bend your linkage. I saw this used race shifter setup on ebay, maybe if afordable it could help you.

http://cgi.ebay.com/ebaymotors/Porsc...00073892QQrdZ1

Jon

915 gearbox installed
 

Hi,

just tried to upload a few pictures of a 915 in a 1303 chassis, but either the files were too big, or the pictures were not worth uploading anymore.
Wanted to show you, that a 915 can be placed in the same position as a bug´s gearbox without cutting the torsion tube out. With my conversion parts (nose cone, traverse front, axle flanges) it´s easy to manage. You can have a look on my site www.bugat5speed.de.

Do also have a 5-speed shifter for the 915 with very short shift ratios. It´s easy to install into bugs and is very exact to shift. Has very strong spring barrier inside against 5th and R-gear.
Can send some pictures by mail to those who give their mail-addresses.

Sorry that I can not show the pictures to all of you. Perhaps you can tell me what I´m doing wrong with my pictures (80 KB is not very much)

Cheers Martin info@bugat5speed.de

Hi BugaRu

Thats a nice shifter, I think I will stay with the stock one.

I cut my torsion bars for two reasons,
1 Moving weight forward for better distribution.
2 A STI motor with variable cams fitted to a G50 would have put the cam covers out near the rear bumper.

Steve

Does anyone know how much power a Porsche 915 Trans can hold. Also any idea of the R&P and 1-5th gearing?

Matrin... I checked out your Website but couldn't read German. By the way very nice and well done website.

Here is a link to one of my Websites. Nothing fancy, just shows some of my cars. Actually I need to spend some time on it and update it with newer pics and info. The 1966 Bug now has a new power plant.

http://www.bugaru.com/

Steve....
Is the STI engine being pushed backwards because of the added size of the Porsche Trans?

I'm using a STI Block but with SOHC's.. It makes the engine smaller. The pic attached "or should be attached?" This engine is rated at approx 325hp, on 8lbs of boost but I'll know better when I get it on the dyno.
Jon
http://img250.imageshack.us/img250/9...stalled1ko.jpg

mine is the same story as Steve. I cut the centre out of the torsion bar to shift the engine and gearbox forward. For me it was necessary as both the engine and gearbox are longer than the VW engine and gearbox. I want the whole assembly to fit under stock panels, i.e once the engine lid is closed nothing will be visible...

ditto! :D

Hi

Your correct, I needed to move the motor & trans forward because of the lenght of the overall package, if you look at the photo of my motor you can see the lump on the left rear cam cover. I have seen SOHC motors in bugs before they fit nicley.

http://www.clubvw.org.au/images/sti_motor.jpg

I read an article on a Aussie Subaru STI here http://autospeed.drive.com.au/cms/A_1824/article.html

that had a few upgrades, nothing much, better exhaust, piggyback EFI controller etc and it made 195 kW (261.5 hp) at the 4 wheels. I will do these upgrades before I put car on the road and then see if I need anymore power after that.

Steve

PS If you cant open the file at Autopseed let me know.

Steve.
Thanks for the link about the Tech tips on Subaru's. By the way it opened oK. I know what you mean about the cam covers on the DOHC engines. That's why I decided on using the SOHC heads on the STI block. Pic attached below.

Hey, I ment to tell you Nice Website, also great job on your 1972 Superbug.

Do you know Jak, and John from Auzzi who also have Subaru powered VW's. They both have great rides. Dang you Auzzi's just luv to wrench don't you? :)

Also any chance that you know what the gear ratios are for a G50 R&P and 1-5 ratios?

Jon

Subaru 2.5 with SOHC heads.
http://img447.imageshack.us/img447/7...iew4net5zl.jpg

915 gearbox
 

Does anyone here know were i can get a 915 gearbox in the states.

ive seen a few on eBay..

Hi

I know Jak & Paul very well, they live about 2 hours away from me, but we talk all the time and I often go to see them race. Jak posted photos of your motor on http://forums.aussieveedubbers.com a while ago, that is one sexy motor. It puts paid to the phrase "that if it dont go chrome it" your motor has go and the looks.

I was worried about the link opening, its a pay for view website that I subsribe too.

Thanks for your comments on my website and my old car.

The G50 ratios are,
1st 3.5
2nd 2.058
3rd 1.409
4th 1.074
5th .861
C&p 3.44

This is a gear chart I did for my car.
25.315 tyre
3.5 2.058 1.409 1.074 .861
1800 11.26 19.16 27.98 36.71 45.79
2000 12.52 21.28 31.09 40.79 50.88
2200 13.77 23.41 34.20 44.86 55.96
2400 15.02 25.54 37.31 48.94 61.05
2600 16.27 27.67 40.41 53.02 66.14
2800 17.52 29.80 43.52 57.10 71.23
3000 18.77 31.93 46.63 61.18 76.31
3200 20.02 34.06 49.74 65.26 81.40
3400 21.28 36.18 52.85 69.34 86.49
3600 22.53 38.31 55.96 73.41 91.58
3800 23.78 40.44 59.07 77.49 96.66
4000 25.03 42.57 62.18 81.57 101.75
4200 26.28 44.70 65.29 85.65 106.84
4400 27.53 46.83 68.39 89.73 111.93
4600 28.79 48.95 71.50 93.81 117.01
4800 30.04 51.08 74.61 97.89 122.10
5000 31.29 53.21 77.72 101.96 127.19
5200 32.54 55.34 80.83 106.04 132.28
5400 33.79 57.47 83.94 110.12 137.36
5600 35.04 59.60 87.05 114.20 142.45
5800 36.29 61.73 90.16 118.28 147.54
6000 37.55 63.85 93.27 122.36 152.63

Steve

Steve
Thanks for the info. I sent you a PM.
Jon

go to my website, www.laperformance.co.uk . then go to projects page and to carbon car check pics , there you will see 915 installed with no cutting , only the frame horn seams . all the best Lee L.A.P

915 in bug
 

Hi Lee,

nice car the Carbon-one. Did I see right, that there are no rubber blocks on the rear traverse of the 915-box?
If so I fear that vibrations and torque of the engine is gonna kill the housing of the 915 in a few days time.
Am still waiting for your reply to my mails that I sent the last weeks. The 915-parts are nearly finnished now and I don´t know if you want them at all.

Besides, am having a traverse that fits the bellhousing of the 915 and 901 and this one is with rubber blocks.

Looking forward to your reply.

Martin Bott

Are all Porsche G50 Bell-housings the same depth? I’ve heard that some G50’s have a shorter BellHousing, I think the 3.2 Carerra’s is this true? If so, what model cars did this shorter Bell-housing come from? Does anyone know the distance from the axel centers to the outside face of the G50 Bell-Housing?

Also, if mounting a G50 into a Bug can it be rubber isolated mounted, or does it have to be solid mounted?

Thanks Jon

I think it is the 964 onwards G50 that had the longer bellhousing, this was to house the rubber centre clutch pressure plate which was quickly discontinued..

Rubber mounting isn't a problem, just use an original style front 911 mount and the Subaru engine mounts!

Rich

I know this is a transmission thread , but does anybody know the HP rating on the 2.5L engine ? How does it compare to the DOHC 2.0L turbo engine . Any help would be appreciated , as I am going to go with a Suby engine , and I want the most HP I can get . Axl .

I'm not sure of all the spec's.. But here’s what I think I know. The DOHC engines will produce higher rev's a little quicker, plus if installing a turbo DOHC engine little needs to be done to the engine as it already has a turbo ready block. But your need to clearance the engine bay to get the engine to fit.

If space clearances are not an issue the DOHC will work and perform fine with plenty of power and easily upgraded. A DHOC engine measures just about 32" wide.

If space is an issue and you don't want to cut the inter-fender wells etc then the SOHC engines are an almost perfect fit with little or no clearance issues. The 2.5 with SOHC heads will measure just about 29" wide. The 2.2 SOHC engines will measure around 27" wide with plenty of clearance on both sides of the engine when installed. All Suby SOHC engines are respectfully about the same height with the DOHC engines being the highest, but other then the oil pan the height is not the issues with the Suby engines.

Weight. heaviest is the DOHC, then the 2.5 SOHC, with the 2.2 SOHC being the lightest of the Sube's

The 2.5 SOHC engines will produce more torque with almost square numbers between HP & Torque. Little if any head work is needed as the SOHC heads flow very well when used with a Turbo. If you use a STI block with the SOHC heads 300-400 HP is easily obtainable depending on moderate boost levels on your choice of Turbo's, but then again in an already light Bug how much HP does one really need. If you use the stock 2.5 SOHC block and decide that you want to run a Turbo your need to run race fuel or your going to destroy your engine, so if fuel is an issue it might be best to go with the STi block form the get go?

Perhaps some of the Sube-perts can elaborate and better answer your question?

Good luck

Hey SteveC,

Why do you say the 915 isn't as effective as the G50?

Hi DORIGTT

They are not as strong as a G50, they are getting old and have shifter issues.

Steve

Does the G50 use the same shifter as the 915 or do I have to get one of those as well?

The G50 shifter is completely different. The spring action is internal to the box and the shift is effectively reversed to a VW set-up, ie you could put a lever straight on to the shift rod and it would work in the correct directions, in the VW/early 911 set-ups the shifter movement is reversed in the shift linkage.

Rich

So what you're saying is that it is easier to create shift linkage and install it?

easier to just fit the Porsche shifter. Steve C has a picture of his on his web pagehttp://www.clubvw.org.au/steve_carter.htm

Rich

Hi

Having said that the G50 is a better tranny, I should also add that its a lot bigger than a 915 box and is harder to fit.

Steve

very cool stuff guys!

do you guys think a g50 box would be able to fit in a notch with an EJ20t or tt?

Hi

The G50 is longer so unless you cut into the torsion bars the motor may sit to far back. I moved mine 100 mm forward, the nose of the G50 nearly touches the chassis number.

Steve

Hey Trevor, which kit is the one you used for the rear arms front pivots?

Thanx
Chris

Chris, if you mean the bushes for the rear trailing arms, then it's the normal aftermarket urethane bushes kit for an IRS bug. The bushes fit the Porsche arms and allow the use of the large diameter bolt from the bug. I suppose you could fit stock replacement VW rubber bushes, but there's no harm in upgrading to the urethane bushes...

how much longer is the EJ motors compaired to the T4 or the T1's?

Couple of questions after reading the thread.

There is a lot of talk of widths of Subaru engines, but does anyone have an idea of lengths?

Has anyone considered newer porsche trannys like G64 (993 turbo)? Can the newer water-cooled 996 boxes fit, e.g. G96?

Can the differences you describe by the type of G50 gearbox be summarised by the second set of digits in the box type i.e. G50, G50-01, G50-02, G50-03 G50-50 etc. as I have elsewhere seen references in this context.

And what about the std IRS t1 gearbox - for the cost of a G50 (say £1300/$2000) is it possible to beef up the IRS box to take the same sort of power? (without 5 gears of course)

Cheers

Damn Sid,

You've obviously got a chop shop or unlimited funds eh? ;)

Hi

I just went and measured my 2 litre STI. Its 790 mm across the cam covers and 430 mm from the tit on the variable cam sprocket cover to the mounting face at the flywheel end, I guess a normal WRX would be around 390 mm for the same measurement.

Steve