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Have you driven the Exedy twin disc clutch?
I have that in my car and it is really nice. I did also add the FEED slave cylinder however which helped quite a bit too, the engagement is smoother and more consistent now.
how would you compare the Exedy and the McLeod clutch?
I had one of their sprung center twin disc cerametallic clutches on a daily driven Mustang for years until I swapped it out with the McLeod twin disc organic.
Acceptable chatter is subjective and while the twin disc chatters less than most single disc FD options out there, I was really excited to have the McLeod developed for the FD.
I am process of installing the McLeod clutch. We noticed that the ring gear on the flywheel is missing. McLeod wasn’t terribly helpful and just told us to transfer it over from my previous flywheel. Not only is that impossible with an aftermarket flywheel but even with an OEM flywheel the process isnt exactly straight forward. Edit: Also just found out we need a pull to push type conversion.
how did you overcome this? A bit disappointed with McLeod
Exedy is the OEM supplier for the FD, it's made in Japan, there are no fitment mysteries, and even with the twin discs the pedal pressure is reasonable. I see no reason to get anything else other than cost, and even that is questionable since most of the cost is labor anyway.
Upon closer inspection, the last sentence of the MotoIQ article (posted Dec 10 2022) says "We are excited to get this into the car ASAP!". As of today I haven't seen any updates or photos of the McCleod clutch installed on a rotary engine.
I am process of installing the McLeod clutch. We noticed that the ring gear on the flywheel is missing. McLeod wasn’t terribly helpful and just told us to transfer it over from my previous flywheel. Not only is that impossible with an aftermarket flywheel but even with an OEM flywheel the process isnt exactly straight forward. Edit: Also just found out we need a pull to push type conversion.
how did you overcome this? A bit disappointed with McLeod
You need a flywheel ring gear. They're about $95-110 from various RX7 vendors.
Why not just get a tried and true setup that comes with everything. Has there been any major clutch technology enhancements in the last 10 years? I don't see any reason to go with a McLeod when there are lots of other options available that do a solid job and come with a ring gear already built into the flywheel.
Why not just get a tried and true setup that comes with everything. Has there been any major clutch technology enhancements in the last 10 years? I don't see any reason to go with a McLeod when there are lots of other options available that do a solid job and come with a ring gear already built into the flywheel.
Is there anothet twin disc organic clutch that has the same holding power as the McLeod? Most are cerametallic pucks that chatter and are not as refined as a twin disc organic.
I guess it depends on what you need. But plenty of high power builds out there that don't need twin disk. And there are twin disks like exedy that work fine as well.
Is there anothet twin disc organic clutch that has the same holding power as the McLeod? Most are cerametallic pucks that chatter and are not as refined as a twin disc organic.
If you want a refined dual clutch that is perfect for the street, with no issues, no chattering perfect in every way and capable to hold the power, OS-GIken R2CD is fantastic.
The selling point for me was McLeods reputation, organic disc and cost. Nearly half the price of OS geiken, so I thought.
Between the ring gear, headache of "sweat pressing" it in, buying a pull to push converter from mazdatrix... I would recommend going with OS geiken.
Is there another twin disc organic clutch that has the same holding power as the McLeod? Most are cerametallic pucks that chatter and are not as refined as a twin disc organic.
Until someone has successfully installed one on an RX7, we can only guess at the holding power of the McLeod. How is your RX7 project coming along? Is the clutch installed? How much power has it held so far?
The clutch did not fit with the mazdatrix push pull conversion. Bearing hits the pressure plate. I will be returning the clutch to McLeod. Mazdatrix wont be accepting a return for the conversion kit.
The selling point for me was McLeods reputation, organic disc and cost. Nearly half the price of OS geiken, so I thought.
Between the ring gear, headache of "sweat pressing" it in, buying a pull to push converter from mazdatrix... I would recommend going with OS geiken.
Armen
agreed 100%
the installation of the r2cd is extremely straightforward or any os giken for that matter. The most “challenging” part is to do some grinding on the bell housing to clear the piston. The manual gives very clear instructions. Very simple process
i had the str2c in the past also. Also a great option but i really love the r2cd. The feeling is superb
As an update, Project FD RX7 "Restomod" has had a bit of a delay. We had many plans to test this clutch and various other components on near stock power levels. Unfortunately a small engine fire has set the project back nearly a year now, burning down the entire fuel system and wiring harness. The plan to have many staged upgrades has been forced into a more condensed build, from a complete fuel system with unique fuel starvation solution to and upgraded turbo, a re-engineered cooling and oiling systems, suspension, and a full engine build.
Needless to say, we have yet to install the McLeod clutch on the (about to be assembled) built engine. However, Armen's concerns have pushed us at MotoIQ to meet with McLeod today to address all of these issues.
McLeod is a big name in the domestic street/drag/track world where it is common for customers to source and install their own ring gears. Additionally, the McLeod RX-7 RST/RXT clutch offerings were originally built for T-56 swapped cars that have a push-type slave cylinder and require the automatic transmission counterweight. After our discussions with McLeod, they are coming up with a pull-to-push slave cylinder conversion that will work with the stock FD transmission as well as increased the urgency to find a ring gear supplier as well as a manufacturer of the automatic transmission counterweight, which they were already working on. We are confident that a solution will be available very soon to be able to use this fantastic clutch that I've really liked in the Mustang world. If you have any questions, feel free to DM me.
Good news. Idk why they'd waste their time and money making their own counterweight though. They are already available. Rx7 stuff in general is low volume, then narrow that down to people that 1) are buying McLeod clutches and 2) need a counterweight, volume will be super low. Awesome that they are building a nice solution, but hopefully they don't end up showing they'll spend too much money on it and have it end up getting cancelled, or worse, pricing it super high.
I hope they resolve the fitment issues and offer a tested FD clutch. The material and build quality did seem excellent.
With that said, I had a less than ideal conversation with them yesterday, specifically Brian. He was hesitant to accept that the clutch simply does not fit and seemed to expect me to trial/error multiple components including bearings on my dime. Hope you have a more fluid experience with them.
i have run the Exedy double disc cerametallic for a number of years. Exedy, being the R&D/Racing arm of Daikin, has an unlimited R&D budget and it shows. the package is a jewel. (Daikin is a multi multi billion dollar a year company that makes almost all of the global OE driveline stuff)
there is more R&D money into the intermediate slider plate, or the flywheel, than there was invested in my Mcleod RST complete package. take a good look. this is true bling for me:
when i switched out my OE 5 speed for a Tremec T56 6 speed ( 2012) i called my guy at Exedy USA and asked him if they could make something that would be a fit. of course the answer was no.
around that time Mcleod had introduced their all conquering RST. ORGANIC, Sprung double disc, capable of holding 800 fwhp against as much weight as 3900 (Camaro Mustang) to the 4400 pound MOPAR barges.
since the Tremec is a normal push clutch there was little problem w the switch.
from the first take up the difference was night and day... as much as Exedy had attempted to corral the dual setup, the lining is the lining and it is cerametallic... (BTW, their own patented material)... the Exedy is wonderful other than being in a lot of stop and go traffic.
the FD OE clutch is not materially different as to feather and pedal effort to the RST.!
(don't know how they did it).
i do not do drag starts but drive the RST hard and have made lots of runs at the 600 rwhp level. here's hoping Mcleod can find a way to get on board the FD
i did send the package back to them a couple of years ago and they very significantly lightened the flywheel
the primary challenge for the rotary clutch package is that it is a small engine. small engine equals small flywheel equals small frictional area when combined w more ponies equals big challenge in the balance between clutch spring pressure and pedal effort. Mcleod has solved the problem but has yet decided to cash in on the FD app.
Last edited by Howard Coleman; 02-16-23 at 08:34 AM.
the primary challenge for the rotary clutch package is that it is a small engine. small engine equals small flywheel equals small frictional area when combined w more ponies equals big challenge in the balance between clutch spring pressure and pedal effort. Mcleod has solved the problem but has yet decided to cash in on the FD app.
They have decided on it, and we are working with them to have an OEM FD solution very soon.
Project FD RX7 Restomod: Part 8 – Trans and Diff Mount
To handle our plans for increased power, we ditch the weak and heavy OEM “Power Plant Frame” (PPF) in favor of a traditional transmission mount from Banzai Racing and differential brace from Sikky Manufacturing.
Project FD RX7 Restomod: Part 8 – Trans and Diff Mount
To handle our plans for increased power, we ditch the weak and heavy OEM “Power Plant Frame” (PPF) in favor of a traditional transmission mount from Banzai Racing and differential brace from Sikky Manufacturing.
How is the clearance between that sikky brace and the fuel lines? Is there enough space for larger hard or AN lines?
It's tight but I was able to get an AN-8 to fit between the chassis and the brace.
Originally Posted by scotty305
That's fascinating, I've heard of people adding braces but I haven't heard of anyone removing the powerplant frame aside from the V8 swap guys.
How did things turn out with the McCleod setup?
They are engineering a slave cylinder solution at the moment.
Originally Posted by TwinCharged RX7
Why not just go with the banzai rear diff brace and keep the PPF?
I didn't want to keep the 20lb PPF, and I didn't like the idea of hard-mounting the diff and rear of the PPF directly to the chassis. The Sikky brace has a poly mount to better isolate NVH, which is still more than I'd like.
01-05-23, 03:08 PM
