Strengthening a Gearbox for Big Power

[VT1-R]

How do you go about strengthening you gearboxes for big HP???

I've just turbocharged my B16A engine with the works done to the internals, and now I want to make sure my Y21 gearbox doesn't break halfway down the 1/4 mile.

What are my options???

[Boosted3g]

A Quaiffe is a must if your pushing a ton of power. There are a few companies out there that does make stronger gear sets for your Y21 but they are about 2500 bucks. You can however alter all the ratios in there.

[VT1-R]

Hmmm... expensive options, is there anything I can do that isn't as expensive?

Is the Integra Gearbox any better?

[ebpda9]

i'm not sure about the y21 tranny is that a manual or an auto ? i know www.levelten.com can bulletproof your tranny for up to 500hp and 500tq.

[VT1-R]

went to Level10's site, looks like they only do Auto's... They Y21 tranny is a manual.

[ebpda9]

give them a call. they should make them if not do a search on google. i came up once with a lot of companies that modified trannies but i haven't saved the links

[Boosted3g]

I wouldnt worry about the y21 holding up. It can take abuse but like every honda tranny the diff is the weak point.


BTW i make over 500whp on a y21 with jsut a Quaiffe. That is the only upgrade to the tranny

[ChrisCantSkate]

the only other thing i'd be worried about would be clutch and then your syncros''' honda syncros like to go bad, i doubt 500hp would slow it down at all

[VT1-R]

Thanks for the info, I'll look around for a Quaiffe Diff.

What price should I be looking at?

[ChrisCantSkate]

850 i think