I'm in the process of getting things together for my Honda build:
My question is what transmission work is needed for that kind of power? I already have mfactory LSD, twin disk competition clutch. do I need to change the syncros?

btw Its going to be a daily if that matters

 

Nothing, I ran a stock Civic R trans for years of abuse and did nothing to it at 600whp.

 

crazy! Nice. I was hoping I didn't have to do the syncros! Thanks for the fast response

 

No problem, if the synchros are in good condition I would just leave them alone. In the future if you need synchros get the Synchrotech stuff which is fairly cheap.

 

Depends on the type of driving you do, type of tire you run, wheel weight, car weight, how the power comes on, how long you want it to last before it breaks, etc.

 

In terms of strengthening it theres nothing really to do. new bearings and again for road racing, the carbon-coated synchros are good. Our stock trannies should be fine for 600hp, ya did the LSD, if you are gonna be dumping the clutch, possibly consider the OMNI clutch master cylinder maybe, it shortens the clutch pedal stroke.. Remember to always use Honda MTF

 

B series is not fine for 600whp. They start breaking around 240whp. Never use Honda MTF, it is too thin and lacks adequate EP additives.

 

Dude, stop misleading the newbie.

600hp is doable on a stock Honda transmission without 'breaking.' LSD, new bearings and carbon synchros are all my buddy's 750whp k24 turbo'd Civic needed.

 

I'm with Aquafina on this one, i have seen a lot of B series blown with few more than 300 hp, specially with twin clutch .

 

I guess I lucked out with mine, stock Civic R trans lasted 6 years and many QM passes, oh and it never broke I just sold it for a GSR trans. I lucked out with axles as well, DS 2.9 axles were in my car from 2006 to 2016 and never broke. That is with 900whp and probably 200 QM passes over the years, mid 9 passes and around 60,000 miles of street driving.

 

I have no reason to mislead him and I'm speaking from my vast experience of building transmissions for varying power levels and various types of driving. With how tech oriented you are on here I would expect you to only answer a question like the OP's if you have the experience and data to back up your answer.

 

200 passes at 900hp, you were extraordinarily lucky.

 

200 passes, 900hp , 60000 miles and same axles. You are one of a kind. congratulations.

 

240hp can be done naturally aspirated, tell me what on the transmission "breaks" at 240hp? Got any pics, cause I'm interested

 

Final drive, diff, 2nd gear, 3rd gear, 4th gear.

Here is a customers C5 trans. He kept breaking 3rd and 4th (every one a brand new trans from Acura) with 240whp. He finally grew tired of it and had me build a trans for him and hasn't had any issues since.

240whp C5 trans.

 

This cant be normal gear fatigue. Do ya know the cause of the problem? Cause looking at that one synchro, the teeth look nearly missing, and the one up top appears to be burnt. Did this guy shift really really fast? The only time I personally have seen that is when someone misinstalled something or something smaller broke and it got locked into 2 gears at the same time.

 

The cause was stock gears with 240whp on heavy 17's with Hoosiers. Each trans only lasted 1-3 events before breaking so figure maybe a couple hundred miles max.