My buddy Chris and I were discussing rev's at highway speeds. For us the maximum speed limit on a 100 series highway is 100-110km/h. Now my car rev's about 25-2700 RPM's, it's a 6 speed. Chris's mutlible VW's usually pull about the same but their 4 cylinder and 5 speeds.
So Chris mentioned he wanted to put a TDI 5th gear in his Corrado, apparently it'll drop the RPM's to abou 18-2000. So I mentioned I wouldn't mind replacing my 6th to get the RPM's down to 1800, we both do A LOT of highway. And sense I can drive around town in 6th pullin 1500 I figgure there's no reason it couldn't be swaped out.
BUT, then I thought shifting from 5th to 6th at 100km/h (60 mp/h) would mean a 700-1000 RPM drop. Seems excessive, so I thought maybe insted of swaping the 6th gear, why not swap out the final drives in the differential (crown/ pinion). I'm not sure what the current ratio is, but it seems to me that if I swap those gears, I could lenghen out ALL the gears and gradually build up to that 1000RPM drop.
If I could gain 1-200 RPM per gear, then by the time I hit 6th wouldn't I be down to the 1800RPM mark?
I'm no expert on gearing, I've swaped a few pinions over the years, but I never had to sit down and come up with a ratio. I imagine the ole man could answer this one but he'd need to know the final drive ratio.
So any thoughts from the experts would be great, probly poke a hole or two into what I said. Basicly I'm askin if I'd be better off to swap the finals (what's the ratio?) or take it to a tranny shop and have 6th swaped from whatever stock is to something more highway friendly?:einstein:
EDIT: Sence I have you attention; Would anyone reccommend the XTD clutch kits? (stage 2 or 3) I tried Fidanza but they said they don't make a clutch kit for the 2.7L Tiburon.....
So Chris mentioned he wanted to put a TDI 5th gear in his Corrado, apparently it'll drop the RPM's to abou 18-2000. So I mentioned I wouldn't mind replacing my 6th to get the RPM's down to 1800, we both do A LOT of highway. And sense I can drive around town in 6th pullin 1500 I figgure there's no reason it couldn't be swaped out.
BUT, then I thought shifting from 5th to 6th at 100km/h (60 mp/h) would mean a 700-1000 RPM drop. Seems excessive, so I thought maybe insted of swaping the 6th gear, why not swap out the final drives in the differential (crown/ pinion). I'm not sure what the current ratio is, but it seems to me that if I swap those gears, I could lenghen out ALL the gears and gradually build up to that 1000RPM drop.
If I could gain 1-200 RPM per gear, then by the time I hit 6th wouldn't I be down to the 1800RPM mark?
I'm no expert on gearing, I've swaped a few pinions over the years, but I never had to sit down and come up with a ratio. I imagine the ole man could answer this one but he'd need to know the final drive ratio.
So any thoughts from the experts would be great, probly poke a hole or two into what I said. Basicly I'm askin if I'd be better off to swap the finals (what's the ratio?) or take it to a tranny shop and have 6th swaped from whatever stock is to something more highway friendly?:einstein:
EDIT: Sence I have you attention; Would anyone reccommend the XTD clutch kits? (stage 2 or 3) I tried Fidanza but they said they don't make a clutch kit for the 2.7L Tiburon.....