3rd gear@6900rpm, or 4rth 5000rpm???

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Jul 6, 2008 | 07:34 PM

#26

UKSUV

6th Gear

Joined: Oct 2004

Posts: 3,673

Likes: 2

From: Marsala, Sicily

Quote:

Originally Posted by hemiheaded18

I could get it now but I dont think I want to sell the BMW. Maybe I can trade my wife for some services....

Jul 6, 2008 | 08:07 PM

#27

07BPB

5th Gear

Joined: Jan 2008

Posts: 680

Likes: 1

From: Brisbane, Australia

What is this stroker/turbo set up you speak of? Engine swap or something you can "bolt on" to the MC engine you already have?

Jul 6, 2008 | 08:19 PM

#28

hemiheaded18

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Joined: Nov 2006

Posts: 3,673

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Quote:

Originally Posted by 07BPB

What is this stroker/turbo set up you speak of? Engine swap or something you can "bolt on" to the MC engine you already have?

It's basically a totally rebuilt (read:modded) factory motor. It's been punched and stroked from a 1.6 to a 2.0 and have a custom turbo setup (read:not buyable from catalog or website) added on. Here's a writeup from the R53 guys:
https://www.northamericanmotoring.co...d.php?t=145247
That motor still uses the Eaton M45 while UK's setup will utilize a turbo. Speaking of which, what were you going to use as a turbo, UK, and what kind of boost numbers? GT42R.....

Jul 6, 2008 | 08:24 PM

#29

07BPB

5th Gear

Joined: Jan 2008

Posts: 680

Likes: 1

From: Brisbane, Australia

*drool*

How much?

Jul 7, 2008 | 10:39 AM

#30

UKSUV

6th Gear

Joined: Oct 2004

Posts: 3,673

Likes: 2

From: Marsala, Sicily

Quote:

Originally Posted by hemiheaded18

UK, and what kind of boost numbers? GT42R.....

Umm...yea. You guessed it right on the head.

Either that or something a little bigger...

A T-88 out of a Supra with boost not coming online til 6K...

Jul 7, 2008 | 12:02 PM

#31

AliceCooperWA

5th Gear

Joined: Oct 2006

Posts: 664

Likes: 1

Looks like it starts around $10k at the moment...
I'm not messing with my engine either...my plan is to try and make it last about 100,000 miles more...then swap out the engine for the stroker (hopefully it is available several years down the line...I'll do the 6 spd swap when my tranny breaks.

Jul 7, 2008 | 01:17 PM

#32

hemiheaded18

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Joined: Nov 2006

Posts: 3,673

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Quote:

Originally Posted by UKSUV

Umm...yea. You guessed it right on the head.

Either that or something a little bigger...

A T-88 out of a Supra with boost not coming online til 6K...

Found one:

Jul 7, 2008 | 01:45 PM

#33

Jtrem

6th Gear

iTrader: (4)

Joined: Oct 2006

Posts: 3,368

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From: SoCal

Quote:

Originally Posted by UKSUV

That's why Im not even gonna mess with my Cooper's engine. Already have the 6-speed....and working towards Jan's stroker/turbo drag setup.

What's it at...like 700HP?

Sometimes I think your mental. Then other times I just know you are haha

Jul 7, 2008 | 02:50 PM

#34

UKSUV

6th Gear

Joined: Oct 2004

Posts: 3,673

Likes: 2

From: Marsala, Sicily

Quote:

Originally Posted by Jtrem

Sometimes I think your mental. Then other times I just know you are haha

I don't know...everybody says I am but maybe they dont know what they are talking about...

Jul 7, 2008 | 04:29 PM

#35

101101

3rd Gear

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Joined: Jul 2007

Posts: 264

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From: Charlotte, North Carolina

Quote:

Originally Posted by nickbmw

Those of you who have the Midlands gearboxes, what do you feel is faster? Taking the 3rd gear in 6800-6900rpm and shift to 4rth (revs going at 5300-5400rpm), or shift at 6200-6300 rpm from 3rd to 4rth gear, and go right on the torque peak on 5000rpm???? Sometimes i feel i am only losing time taking the 3rd gear from 6300-6400rpm to 6900.

Here's a plot I made up a while ago (from the who has blown a tranny thread):

It goes by speed, not engine speed, but there is clearly a point where 4th is favorable to 3rd (at ~105 mph, whatever that works out to be in rpm's). For reference, that plot assumes you're running a tire with 12" rolling radius.