Auto with a clutch
Discussion
How does that work then? Is this possible for road use too?
I noticed in that Ebay advert that they mention a BW35 with a clutch. Surely the torque multiplication from the torque converter is lost and makes the gearing horrible?
I must confess my knowledge of drag racing transmissions (and autos in general) leaves a lot to be desired, but some explanations would be great!
Like- how does a two speed work on a street/strip car? Does it need a massively broad power band or is there some serious slippage going on?
I noticed in that Ebay advert that they mention a BW35 with a clutch. Surely the torque multiplication from the torque converter is lost and makes the gearing horrible?
I must confess my knowledge of drag racing transmissions (and autos in general) leaves a lot to be desired, but some explanations would be great!
Like- how does a two speed work on a street/strip car? Does it need a massively broad power band or is there some serious slippage going on?
roscobbc said:
Try Honda I-Shift, VW/Audi/Skoda, Citroen etc - all are manual robotised gearboxes with one or two clutches. Torque multiplication is fine and perhaps desireable on a smaller engined car - with big engines and big horsepower it works against you - major traction issues
The production stuff is hardly relevant to racing though, is it? They struggle to contain the stock power levels and suffer from computer control too.What about pressure for the valve chest? Surely the 'box needs the input shaft to be spinning to build oil pressure?
BB-Q said:
roscobbc said:
Try Honda I-Shift, VW/Audi/Skoda, Citroen etc - all are manual robotised gearboxes with one or two clutches. Torque multiplication is fine and perhaps desireable on a smaller engined car - with big engines and big horsepower it works against you - major traction issues
The production stuff is hardly relevant to racing though, is it? They struggle to contain the stock power levels and suffer from computer control too.What about pressure for the valve chest? Surely the 'box needs the input shaft to be spinning to build oil pressure?
roscobbc said:
BB-Q said:
roscobbc said:
Try Honda I-Shift, VW/Audi/Skoda, Citroen etc - all are manual robotised gearboxes with one or two clutches. Torque multiplication is fine and perhaps desireable on a smaller engined car - with big engines and big horsepower it works against you - major traction issues
The production stuff is hardly relevant to racing though, is it? They struggle to contain the stock power levels and suffer from computer control too.What about pressure for the valve chest? Surely the 'box needs the input shaft to be spinning to build oil pressure?
Veering off on a slight side track here, is there such a thing as an affordable, streetable sequential box? I'm trying to get some engineer friends to adapt a T5, but we're kind of frying our brains with the design!
BB-Q said:
roscobbc said:
BB-Q said:
roscobbc said:
Try Honda I-Shift, VW/Audi/Skoda, Citroen etc - all are manual robotised gearboxes with one or two clutches. Torque multiplication is fine and perhaps desireable on a smaller engined car - with big engines and big horsepower it works against you - major traction issues
The production stuff is hardly relevant to racing though, is it? They struggle to contain the stock power levels and suffer from computer control too.What about pressure for the valve chest? Surely the 'box needs the input shaft to be spinning to build oil pressure?
Veering off on a slight side track here, is there such a thing as an affordable, streetable sequential box? I'm trying to get some engineer friends to adapt a T5, but we're kind of frying our brains with the design!
The original question was one of interest because I didn't know how it worked and because I never discount an idea out of hand.
I need a reliable 'box with decent ratios for an affordable price to go behind a 400ft/lb(ish) 4 pot turbo motor for street and strip. I've currently got a T5, as that's really the only affordable option I know of and they come with excellent ratios as stock. Ihave a real dislike of auto because I don't feel in control of one, but then I've never driven a car with a "built" one. I know a Swede running a car same as mine (but in the 8's!!!) using a clutched Jerico, but again I know very little about those.
I've got to shoot back off to work now but am always interested in educating myself about the various options and what organs are required as payment.
Maybe a discussion of the pros and cons of various transmissions would be useful here?
I need a reliable 'box with decent ratios for an affordable price to go behind a 400ft/lb(ish) 4 pot turbo motor for street and strip. I've currently got a T5, as that's really the only affordable option I know of and they come with excellent ratios as stock. Ihave a real dislike of auto because I don't feel in control of one, but then I've never driven a car with a "built" one. I know a Swede running a car same as mine (but in the 8's!!!) using a clutched Jerico, but again I know very little about those.
I've got to shoot back off to work now but am always interested in educating myself about the various options and what organs are required as payment.
Maybe a discussion of the pros and cons of various transmissions would be useful here?
Steve Johnson and I used to use these in the 80's you had to use a pre 1970 BW35 as it had two pumps, we used to remove the front pump, wweld up the front drum and weld a manual input shaft on, make up our own valve body and then we had a 3 speed trans with no reverse and no nuetral, had to use a rod to hold down the clutch pedal. please note when I mention the "we" above the genius was Steve I made the tea and got the chips!
BB-Q said:
Veering off on a slight side track here, is there such a thing as an affordable, streetable sequential box?
Affordable sequential box?Furyous said:
BB-Q said:
Veering off on a slight side track here, is there such a thing as an affordable, streetable sequential box?
Affordable sequential box?
Furyous said:
BB-Q said:
Veering off on a slight side track here, is there such a thing as an affordable, streetable sequential box?
Affordable sequential box?Gassing Station | Drag Racing | Top of Page | What's New | My Stuff