Hi All,


I have a Subaru with 575BHPish- It is currently fitted with a 5 speed gearbox with PPG straight cut syncro 1-4 gear sets, billet selectors and a quaife ATB LSD.

Im not sure I can live with the gearbox wine/noise on a day to day basis.

So I was contemplating changing out the straight cut syncro gearsets and fitting Helical cut syncro PPG gear sets to 1-4.

Or

I also have an STI US spec 2004 6 speed with DCCD and rear diff. I know this will not take 575bhp for long.

My questions are:

1. Will the Helical PPG gearsets take 575bhp?
2. Any recomended gearbox builders?
3. Does anyone make upgraded helical syncro gearsets for the 6 speed box?

Any constructive information will be most welcomed.

Thanks


SleeperSy.

 

have a word with paul at ZEN performance

 

Thanks Steve,

I belive he did the original box, so Ill give a call on Monday.

 

and ?

I believe your 3rd went at SSO ... did you change before or after?

 

Are you sure Sleeper is for real, or is his car now a touch different to his 'Veiw my Scooby'?

 

He's for real Graham.

As mentioned he ran at SSO and his car is a serious piece of kit.

 

check out transmission page on RalliSpec Ltd. some interesting options.

 

Graham he bought Alan Garrod's old beast!

Banny

 

What has AG got now then?

 

since it was alang's old car i think he is for real view my scooby means nothing its there just for a laugh

 

Thought so, but sometimes you never know!
I don't do the SSO and such events so don't know the players.

Are there any details of the car anywhere?

 

Still in his "View my Scooby" profile.

 

I dont see why the standard STi transmission cant take that power. I might be wrong

 

Thanks, now i remember the car. Sure is nice.

WRX: It will be the torque that would kill the stock box. Mine is ok at 360 lbft so far.

 

might well be

 

I sent a mail to PPG regarding the torque rating for the helical kit and got a rather unhelpful - it should handle 500 to 600 bhp but if you are doing launches etc, we recommend the straight cut... so I guess the question is what you are planning to do with the car in the future....

 

and if your doing drag launches like i seem to do, they recommend the straight cut dog gears.

 

I spoke to Rigoli boys a few time in Aus and they said they had a few 600bhp cars with standard 6speed and still holding up.

Will 6speed deffo not take it?

 

How long have you been running 360ftlbs as I have 340 and my box is a bit winney on run down on 3rd and 4th and it's only been running that for 6 months (cars 3 years old having covered 28K) and not been driven hard/had track days etc.

James.