k24madness

iTrader: (6)

Quaife came out with this last year. https://shop.quaife.co.uk/gearboxes?...e=13&vehicle=4 They offer 4 different options for the NA/NB. The 375bhp limit it's somewhat restrictive though. The weight looks to be the same as a stock 6 speed.

The price is pretty tough to swallow. After seeing my friends BMW converted to sequential I had to peak at our options. One can only dream. :-)

emilio700

iTrader: (3)

I'd like to get one for the OGK. We will see how the budget looks in 6 months

aidandj

iTrader: (5)

Interesting that they measure capacity in horsepower. Torque is what kills things.

k24madness

iTrader: (6)

I was thinking the same thing. The HP may still create heat though. Maybe that's why they rate it that way.

k24madness

iTrader: (6)

That would be epic!

Joe Perez

iTrader: (8)

^ This.

Yes, it's possible to instantly shatter a gear by applying eleventeen-hundred ft/lbs of torque to it with sticky tires and an adequate rear suspension.

But the track crowd, who seem to be the ones killing 6-speeds most frequently, have demonstrated that it's not hard to do so with levels of torque and HP comparable to what many of us run reliably on the street through 5-speeds. The difference would appear to be that they are producing said HP on a nearly continual basis for tens of minutes or even hours, rather than in short bursts of a few seconds at a time.

It's this continual HP production which leads to the generation of heat in the gearbox. Heat softens things, reduces the effectiveness of the lubricant, changes mechanical tolerances, etc.

NiklasFalk

iTrader: (1)

It's rough rating anyway. When it breaks you have applied too much.

But just assuming the rating is focused around a 8-8.5krpm engine, not a 5.5krpm 7L engine.

aidandj

iTrader: (5)

Wonder how much longer a 6 speed would last with a transmission cooler.

patsmx5

iTrader: (16)

Asking the right question. Though "how much" is about impossible to quantify right now but that is the big question.

How about a slightly different question: Would a 6 speed last ANY LONGER with a transmission cooler?

I would say yes. There are high powered cars that are stock with a warranty that have transmission cooler.

I made a transmission cooler thread a while back, it's somewhere on here.

k24madness

iTrader: (6)

I think a cooler would extend the life for sure. I also think a traditional trans mount would help as well. I can't help but think the case is twisting slightly when things get hot. Would love to hear some thoughts from BBundy or other engineers.

d k

iTrader: (4)

I dont know about the qbe60g but the 69g comes with an internal spray bar.

Makes a huge difference.

For my K24 build, I chose to go with the S2K trans for a variety of reasons, one of which is down the road Id like to either replace the gearst or go with a stand alone dog box.

D

phildent

The69G is rated to 750HP.Should be plenty but eye watering in price.


Sequential gearbox packages for Honda S2000, Mazda MX-5 (NA/NB,) Nissan Silvia SR20DET and Toyota 1JZ / 2JZ Supra. - Quaife

k24madness

iTrader: (6)

No flat shifting but here is the 60G in action.

OGRacing

iTrader: (1)

nom nom that noise!!!

cabowabo

Holy ****, yes.

emilio700

iTrader: (3)

That was my thought. Built whammy engine. C30-94 Rotrex on corn. No roof, maybe 1750lbs, many aeros. 15x10 6UL's and 245/40/15 R7's and the pile of 245/580R15 R80's I won a few years back. Much like the 200whp ITB motor we just built, it has no logical reason to exist and won't make me any money. But if I can make it happen, I will. Figure 15s under SM lap records or thereabouts.
Epic is a good word for it.

sixshooter

iTrader: (12)

Do it for the grins? And to set records?

k24madness

iTrader: (6)

That was the other half of my dream.

k24madness

iTrader: (6)

Someday my wallet will match my ambitions.

k24madness

iTrader: (6)

In light of Emilio taking the plunge I am bumping this thread back to life.

I am also going to drink the cool aid in late March. Honestly it's not that expensive after selling off both of my 6 speed transmissions. Money is finally starting to loosen up so this should be a good year for racing.

I am lost on how to handle the flat shift and auto blipping with the MS3. I am hoping the ECU supports that. Thoughts on the matter would be appreciated.