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G54B Transmissions that wont need bodywork


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#1 eclipse

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Posted 08 October 2015 - 05:19 AM

Hi

I have searched for answer, but haven't found correct one for starion transmission swap.

Car has about 500hp at the moment, plan is to crank it up to 800hp. That is from the engine.
I managed to broke my original fully restored gearbox yesterday.

There ain't much starions in baltic, so cutting body isnt an option.

Is there any stronger gearboxes that will fit without cutting? Many other cars use bmw 530d 6 speed manual from e39 body.
I also had that plan, to cut off both gearbox bellhousing and weld starion housing to bmw gearbox.

Looking forward for new suggestions.





#2 freebird

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Posted 08 October 2015 - 05:59 AM

your g54b will make 800 hp :ph34r:
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#3 GINASQ

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Posted 08 October 2015 - 10:46 AM

Maybe the 420G 6spd from the e39 m5, e46 m3, etc. Very strong transmission. I don't know how big it is though. They can usually be had for $700 to $1000.

Edited by GINASQ, 08 October 2015 - 11:02 AM.

-James

#4 aknorthstar

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Posted 08 October 2015 - 12:34 PM

My buddy has a w58 Toyota Supra Trans on his 88 4G63 quest

Edited by aknorthstar, 10 October 2015 - 09:39 AM.


#5 GINASQ

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Posted 08 October 2015 - 03:31 PM

Which?
There's the w58, r154, and v160. I know the r154 and v160 wont fit without working the tunnel and the w58 will not take that power.
-James

#6 psu_Crash

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Posted 08 October 2015 - 06:42 PM

T56 is a good swap and you can build them to take whatever you throw at them. Adapting it to the stock block is the fun part. IIRC Bill Hincher has a bell housing for that but I can't be sure.

P.S. We would all love to see some dyno sheets from that monster. 800HP is a very tall order

Edited by psu_Crash, 08 October 2015 - 06:52 PM.

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#7 mstieg

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Posted 10 October 2015 - 04:16 AM

View Postpsu_Crash, on 08 October 2015 - 06:42 PM, said:

T56 is a good swap and you can build them to take whatever you throw at them. Adapting it to the stock block is the fun part. IIRC Bill Hincher has a bell housing for that but I can't be sure.

P.S. We would all love to see some dyno sheets from that monster. 800HP is a very tall order

Bill's is for the LS1 trans, not the LT1.  His also uses the stock flywheel and clutch.  No way to hold that kind of HP unless double or triple disk clutch.  Bill has another bell to fit the 4G63.

I never got interest to make it worth reproducing my 1 off adapter for the 6 speed LT1.  Installed and will be running soon w/ T56 clutch on T56 Fidanza fly and stock master & slave adapted to LT1 pull style clutch.  Looks like there is still a T56 fly or 2 avail from earlier limited runs:  http://www.ebay.com/...d82251a&vxp=mtr
Before: 352 rwhp @15psi; MPI: SDS EM5F; Chad intake & equal length header; S256 turbo (56/80comp-64/74ex); 48" of 2.5" IC piping
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#8 aknorthstar

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Posted 10 October 2015 - 09:40 AM

Im sure everyone wants to see the dyno sheet!

#9 eclipse

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Posted 14 October 2015 - 04:50 AM

And i think that everyone can understand it wont happen without working gearbox.
Has anyone fitted bmw gearbox by welding starion bellhousing to it?
6 speed seems to be too long. At the moment there is one 900nm e34 550 that is using 3.0d 5 speed gearbox and seems to be holding fine.

I will get that old gearbox out next month and then i can take measurements.

#10 eclipse

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Posted 15 September 2017 - 05:37 AM

I installed bmw 5 speed diesel gearbox.
Problem is that final ratio is too high. Max speed is about 210kmh.
What options there are for rear diff ratio?

Edited by eclipse, 15 September 2017 - 06:43 AM.


#11 jinx

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Posted 15 September 2017 - 11:48 AM

one would think that you would have crunched rpm/mph numbers before going thru all the trouble of adapting a bmw 5spd

can't recall seeing anything numerically lower than the 3.54 stock ratio. Old sapparo 3.31 ?

may need; a third member swap + fab mounting + driveshaft + custom axles if u wanna a retain that bmw box....8.8, bmw, etc..

88 nissan 300zxt(sohc V6) full street car gone low 9s, no spray on factory diff and 5spd
dunno what kinda power it takes to pull that off, but must be up there

show some motor pics and specs

#12 scott87star

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Posted 15 September 2017 - 05:13 PM

Gear Vendors overdrive.
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ECU Vendor link:  http://www.starquest...howtopic=137426

#13 Turbo Cary

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Posted 16 September 2017 - 09:07 AM

View Postjinx, on 15 September 2017 - 11:48 AM, said:

88 nissan 300zxt(sohc V6) full street car gone low 9s, no spray on factory diff and 5spd
dunno what kinda power it takes to pull that off, but must be up there

The Z31 and Z32 N/A share the same transmissions. However the Z31 turbo uses a Borg Warner T5 I believe. I would use an NA trans as they are stronger and easy to come by.

#14 jinx

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Posted 16 September 2017 - 10:55 PM

last couple years of the z31 turbos used the same 5spd as the turbo z32 (rb25 too).
a stout smooth shifting strong box
low 9sec z31 mentioned was 88. Early turbo z31 got the T5

#15 Funky Phil

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Posted 18 September 2017 - 09:05 AM

View Postscott87star, on 15 September 2017 - 05:13 PM, said:

Gear Vendors overdrive.

:)
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

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