New European record

[Chris@Rvengeperformance]

Damn, nice job. Truly impressive on a 6-speed. Probably low 9's in there with a 5-speed & some practice.

I'm curious why you say this. His tires may be a little taller than stock and even grow a little on the big end, but assuming stock tires:

3rd at 145 (trap speed is just an average for the last 60 ft, so the terminal speed is actually higher than this) is 8600 RPM on a 5 speed.

I'm not sure if the OP is running the JDM or USDM six speed gearing, but let's assume JDM.

4th is good for 167 at 8600 RPM.

In short most likely either way a shift to 4th is necessary, but the six speed can actually use it. The lower average gearing should make the six speed car faster, assuming it can be put to the ground. It is also a lot easier on the clutch.

[fastbikes76]

I'm 99% certain Andre does in fact run a 6 speed box He certainly has bought every available 6 speed xfer case in the UK so go figure lol


Sent from my dog n bone

[Permanent grin]

What clutch are you using?

Jeremy

A 7.25" Quartermaster cerametallic twin plate from Tim at TMZ

André

[Permanent grin]

WOW. So was this on a 6 speed trans.

Yes it was

André

[Permanent grin]

Curious to see how the T-case holds up, you are running the billet cover yes?

Yes it was the first real outing for the Frontline Fabrication cover plate. I had also totally rebuilt the TC with new bearings throughout and put the gears through a combination of processes. When I have tested this to my satisfaction and limits I may offer this setup with Frontline Fabrication supplying the covers. However, there is a lot of proving to be done and then I would need to make sure I wouldn't be contravening any forum rules.

André

[Permanent grin]

Damn, nice job. Truly impressive on a 6-speed. Probably low 9's in there with a 5-speed & some practice.

I hope to do that or quicker on the 6 speed but with my planned terminal speeds I don't see how the 5 speed would offer any advantage or gain tbh.

André

[IPD]

Fewer shift points, more durability, imho.

[Chris@Rvengeperformance]

Fewer shift points, more durability, imho.

How is it fewer shift points? Did you read my post? How does durability make it faster?

[IPD]

You're right. I have no idea why 5 speeds seem to be the standard for drags.

[Permanent grin]

Fewer shift points, more durability, imho.

There would be the exact same number of shift points and to my knowledge the 5 speed gearbox is not stronger or more durable than the JDM 6 speed. You need to remember that I am only at wastegate and will be adding another bar of boost, so the terminal speed will be vastly different, high 160's minimum. The TC gears yes, although I am hoping iI have a working solution now.

To illustrate my thinking, these are the approximate maximum speeds per gear at 8500 rpm. Bear in mind that as well as the 1/4 this car will also do the 1km once a year too.

5 speed
1st - 52
2nd - 92
3rd - 143
4th - 192
5th - 238

JDM 6 speed
1st - 46
2nd - 78
3rd - 130
4th - 178
5th - 220
6th - 277

My 6 speed
1st - 63
2nd - 90
3rd - 130
4th - 178
5th - 220
6th - 277


André