EVO 8/9 Synchrotech Carbon Synchros
lmk please
I haven't done the research to see which cars use carbon synchro's (I'm curious to know which ones do), but the fact that majority of cars use & have used brass synchro's since synchro's have been around makes you ask why? Here are some thoughts I have on this: Why use a metal-based synchro? As the metal would wear, the particles because of their weight would naturally settle at the bottom. Carbon being as light as it is, would remain suspended in the gear oil as a result of its miniscule weight. I see 2 potential problems with this.
1. Carbon particles would end up in bearings "gumming up" (think: oil sludge).
2. Heated steel that is introduced to carbon causes hardening, which = brittleness. Not something you want from your gear teeth.
From what I've gathered you've been making these things for quite a while, but I couldn't help share some thoughts on this. Understand I'm not dissing on your product - just asking the hard honest questions. I, along with the other members I'm sure, would like to hear some clear responses to these questions. Not looking for a "we've been selling these XX years..they work."
Thanks.
1. Carbon particles would end up in bearings "gumming up" (think: oil sludge).
2. Heated steel that is introduced to carbon causes hardening, which = brittleness. Not something you want from your gear teeth.
From what I've gathered you've been making these things for quite a while, but I couldn't help share some thoughts on this. Understand I'm not dissing on your product - just asking the hard honest questions. I, along with the other members I'm sure, would like to hear some clear responses to these questions. Not looking for a "we've been selling these XX years..they work."
Thanks.
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
Yes, brass synchro's came before carbon, but that wasn't my question. The question is which cars use carbon synchro's from the factory? I can't recall a single performance car that uses carbon synchro's. That's coming that way from auto manufacturers that invest millions into R&D. If carbon was that much more superior to brass, does logic not dictate we'd see them implemented on performance cars from the factory??
That's good to know. I'm still not entirely convinced of long-term durability (2-300K miles of use). Again, if they were that much more superior to brass, wouldn't we see them used more by manufacterers?
The process of hardening steel with carbon is much more indepth than simply rubbing carbon against steel. What you are suggesting would never happen with carbon synchros rubbing against steel (the syncros do not rub the gears themselves) let alone due to carbon floating around in the oil. Besides, the gears are already hardened using carbon (and several other elements).
Yes, brass synchro's came before carbon, but that wasn't my question. The question is which cars use carbon synchro's from the factory? I can't recall a single performance car that uses carbon synchro's. That's coming that way from auto manufacturers that invest millions into R&D. If carbon was that much more superior to brass, does logic not dictate we'd see them implemented on performance cars from the factory??
That's good to know. I'm still not entirely convinced of long-term durability (2-300K miles of use). Again, if they were that much more superior to brass, wouldn't we see them used more by manufacterers?
That's good to know. I'm still not entirely convinced of long-term durability (2-300K miles of use). Again, if they were that much more superior to brass, wouldn't we see them used more by manufacterers?
Also if you look at the synchrotech website you can see a pretty thorough explanation of how they chose to manufacture carbon coated synchros.
http://www.synchrotech-transmissions..._Synchros.html
Thread Starter
Evolving Member
Joined: Jan 2014
Posts: 100
Likes: 5
From: San Dimas
Yes, brass synchro's came before carbon, but that wasn't my question. The question is which cars use carbon synchro's from the factory? I can't recall a single performance car that uses carbon synchro's. That's coming that way from auto manufacturers that invest millions into R&D. If carbon was that much more superior to brass, does logic not dictate we'd see them implemented on performance cars from the factory??
That's good to know. I'm still not entirely convinced of long-term durability (2-300K miles of use). Again, if they were that much more superior to brass, wouldn't we see them used more by manufacterers?
That's good to know. I'm still not entirely convinced of long-term durability (2-300K miles of use). Again, if they were that much more superior to brass, wouldn't we see them used more by manufacterers?
Here are just a few::
Honda
Acura
Dodge SRT4
Audi O1E
Corvette T56
Mustang T5 world class
Evolved Member
Joined: Apr 2011
Posts: 851
Likes: 2
From: US
[QUOTE=Synchrotech;11198091]
Any updates?
Yes, brass synchro's came before carbon, but that wasn't my question. The question is which cars use carbon synchro's from the factory? I can't recall a single performance car that uses carbon synchro's. That's coming that way from auto manufacturers that invest millions into R&D. If carbon was that much more superior to brass, does logic not dictate we'd see them implemented on performance cars from the factory??
Carbon composite lined synchros have been used OEM in many models to improve shift performance.
Here are just a few::
Honda
Acura
Dodge SRT4
Audi O1E
Corvette T56
Mustang T5 world class
Carbon composite lined synchros have been used OEM in many models to improve shift performance.
Here are just a few::
Honda
Acura
Dodge SRT4
Audi O1E
Corvette T56
Mustang T5 world class
I have no doubt a CF synchro will last as long as brass under the conditions it takes to get 200-300k miles out of a trans without a rebuild.
Newbie
Joined: Jun 2005
Posts: 22
Likes: 0
From: La Plata, MD
How many people are going to drive an evo for 200-300k miles without needing a rebuild regardless of what kind of synchros are in the trans.