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-   -   Quaife Sequential for NA & NB (https://www.miataturbo.net/race-prep-75/quaife-sequential-na-nb-86396/)

emilio700 08-10-2016 11:35 AM

The 13.5:1 200whp 2.0L is the one in Taxi but with 11.0:1 pistons. Should make 180 or so on gas. We no longer offer built engines, just our CNC heads. Logistics for complete engines were too time-consuming and the program was just not cost-effective.

Savington 08-12-2016 07:38 PM

Trackspeed Bulletproof shortblocks + CNC head = match made in heaven

emilio700 08-16-2016 06:35 PM

Another tidbit. The smaller and lighter starter doesn't quite clear the Quaife B series bell housing. It looks like you could do a bunch of grinding to both bell housing and starter frame to make it work. NA starter drops right in so that's what we used.

We're using the Quaife supplied gear position indicator/ temp gauge. So far, it's refusing our attempts to make it read anything other than 6th. The Geartronics aluminum shift knob/load cell is shaped like a dildo.

That is all.

emilio700 08-18-2016 11:32 PM

First drive with the Quaife. Noisy as hell. Beautiful noise but its like 105db of gear whine in every gear except 5th which is direct and nearly as quiet as a stock trans. Each shift comes with a mighty clunk. No flat shift yet. Load cell doesn't output a signal that MS likes. Working on a signal converter. Gear position indicator reads "N" in all gears. Have to pull the trans to reach the sensor. Argh.

Upshift is back. Go forward until it stops. Pull release and shove forward into neutral. Do that again and you're in reverse. Even without the flat shift is nutty fast ripping through the gears and just slapping the clutch. Its fitting that this engine has race cams. Soft down low then hits with a whack at 4500. Rough street tune for now. Dyno in a few days.

https://cimg4.ibsrv.net/gimg/www.mia...5c9bd488c1.jpg



Savington 08-19-2016 01:01 AM

A little jelly, I must admit.

emilio700 08-19-2016 01:21 AM


Originally Posted by Savington (Post 1354967)
A little jelly, I must admit.

It'll be at MRLS. You drive.

Lincoln Logs 08-19-2016 01:50 PM

So much win, cannot wait to see this thing running at full tilt.

aidandj 08-19-2016 01:55 PM

We demand videos!!!

emilio700 08-19-2016 08:06 PM

Noises
 

aidandj 08-19-2016 08:11 PM

Yesssssss...those noises.

Stealth97 08-19-2016 11:55 PM

noises indeed. Possibly the best part lol.

thumpetto007 08-19-2016 11:59 PM

I'll be looking into this trans when I brake my current trans with too many FFS! Quiet gears, though.

Emilio, your facial hair looks bad ass. I like it better than clean shaven for your face.

astral 08-20-2016 02:46 AM

That gearbox is absolutely godly. Real racecar shit.

cabowabo 08-20-2016 12:32 PM

Sweet baby jesus it's amazing.

Are you guys clutching upshifts because you're getting used to it or because the quaife requires it? Drove some crosscarts recently fitted with motorcycle engines/transmissions and only had to use the clutch to get moving, after that it was just a lift to shift up and blip to shift down.

M2Ken 08-20-2016 01:05 PM

Are you rev-matching on downshifts? I have gotten used to slipper clutch and no engine braking on downshifting my motorcycle so that downshifts don't upset it so much. Wow, I hate to say it, but that might just be worth living with for a dual purpose vehicle; I can't imagine banging shifts like that would ever get old.

emilio700 08-20-2016 01:12 PM

The alloy shift knob contains a load cell that outputs a 2-3V signal to indicate for or aft pressure. The Megasquirt MS3 Pro cant use that signal for ign cut without either custom firmware or a signal converter. We're working on the latter. Meanwhile, you can indeed shift without the clutch just by lifting but it's hard on the trans and rough. Quaife explicitly warns against clutchless shifting without a fuel or ign cut. As its not an inexpensive piece of equipment, we're "babying" it by just fanning the clutch until we can get the flatshift working. It'll be ign cut so we'll get nice unburned fuel in the exhaust pops and crackles to go along with the clanks and spur gear whines. We're thinking of sticking the Quaife into Vegas for the 2017 T25. 300whp and the sequential. BOV and EFR intake noises added to this should be an eargasm.

Reverant 08-21-2016 03:01 AM


Originally Posted by emilio700 (Post 1355256)
The alloy shift knob contains a load cell that outputs a 2-3V signal to indicate for or aft pressure. The Megasquirt MS3 Pro cant use that signal for ign cut without either custom firmware or a signal converter. We're working on the latter. Meanwhile, you can indeed shift without the clutch just by lifting but it's hard on the trans and rough. Quaife explicitly warns against clutchless shifting without a fuel or ign cut. As its not an inexpensive piece of equipment, we're "babying" it by just fanning the clutch until we can get the flatshift working. It'll be ign cut so we'll get nice unburned fuel in the exhaust pops and crackles to go along with the clanks and spur gear whines. We're thinking of sticking the Quaife into Vegas for the 2017 T25. 300whp and the sequential. BOV and EFR intake noises added to this should be an eargasm.

How much voltage on for and how much voltage on aft?

Satisaii 08-21-2016 10:48 AM


Originally Posted by Reverant (Post 1355341)
How much voltage on for and how much voltage on aft?

I will have to check to be certain, but it is 2.5V resting and approximately +/- .7V at the force required to initiate the shift. In an ideal world, we would be able to tweak the point at which ignition cut happens... maybe 3.0V works better than 3.2V, but we won't know until we try it out.

Reverant 08-21-2016 01:33 PM

Well get back to me and you'll (probably) have a solution faster than you think.

Satisaii 08-21-2016 10:48 PM

The 2.5V at rest is firm. I can try to get a datalog of the shifts tomorrow if needed. I have it wired on analog input 1. The ideal solution would be a field to input the ignition cut voltage for upshift. I don't think it is needed for downshift, all we have to do is unload the transmission. Emilio may chime in if he wants something for it in software.

And thanks for any help you can give us.


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