Noono
Enthusiast
- Total Posts : 133
- Scores: 3
- Reward points: 5194
- Joined: 2011/08/01 11:02:49
- Location: Newcastle
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/09 18:35:17
(permalink)
BEE VEE
Don't even want to imagine the front yoke digging into the bitumen and flipping the car into the air !
Good reason to fit "protector strap" under prop !
The 'mythbusters' couldn't get it affecting the car at all, until they had the front of the shaft going into a deep slot across the road. That lifted the rear wheels off the road momentarily. But it was a large car.
|
GTV6
Master
- Total Posts : 736
- Scores: 34
- Reward points: 5871
- Joined: 2011/08/01 11:02:49
- Location: Perth WA Australia
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/09 22:24:10
(permalink)
BEE VEE
......... drooling at the thought of cruising interstate in 6th with the revs around 1500-2000 !
But would the v6 be able to deliver the torque required at such low rpm? It's cam profile and stroke wasn't designed for that rpm range.
|
BEE VEE
Scholar
- Total Posts : 1020
- Scores: 17
- Reward points: 3952
- Joined: 2014/01/02 15:53:02
- Location: MORNINGTON PENINSULA, melbourne
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/09 22:57:05
(permalink)
I saw that clip on Mythbusters Noono. Such a huge yanktank; it surprised me it got as much lift as it did. Fully expected the diff and prop to come thru the boot lid ! GTV6
BEE VEE
......... drooling at the thought of cruising interstate in 6th with the revs around 1500-2000 !
But would the v6 be able to deliver the torque required at such low rpm? It's cam profile and stroke wasn't designed for that rpm range.
Not sure with a stock oval port V6, but my D-port Special has unbelievable torque. How many Capri V6's out there can accelerate heavily from 40 kph to 100kph in top gear while continually climbing a very steep road ? I must look for the CAM measurements I took when I had the whole engine in pieces 3 years ago. It's def no stock cam. But even a stock V6 dropped into overdrive at 100 kph should not be a problem I would have thought ? So many guys have done this overdrive conversion before and I havent read one of their stories turning "sour". Can anyone comment if theres ever been an issue with overdrive lack-of-torque on even a stock V6 ?
"GOOD BETTER BEST: NEVER LET IT REST: UNTIL YOUR GOOD IS BETTER, AND YOUR BETTER, BEST" ( Furphy WW1 HORSE-DRAWN water-tank end-plates)
|
GTV6
Master
- Total Posts : 736
- Scores: 34
- Reward points: 5871
- Joined: 2011/08/01 11:02:49
- Location: Perth WA Australia
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/10 00:41:48
(permalink)
Oval and D port have the same torque and they all pull well from a crawl but can they sustain that much torque for long periods without over heating or excessive wear. Most 5speed conversions only drop the revs at 100k's by about 500rpm so Im not sure if it could handle a 6 speed. Would be nice to know.
|
BEE VEE
Scholar
- Total Posts : 1020
- Scores: 17
- Reward points: 3952
- Joined: 2014/01/02 15:53:02
- Location: MORNINGTON PENINSULA, melbourne
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/10 14:30:34
(permalink)
Yes. It’s a valid point you raise.
Hoping to hear from others who can share their opinions.
But when I think of the buz box rice burners that have miles less torque than our Essex V6’s that have o drive with no issues, it makes me wonder.
Like them, we have the advantage of power to weight with Capris light body.
"GOOD BETTER BEST: NEVER LET IT REST: UNTIL YOUR GOOD IS BETTER, AND YOUR BETTER, BEST" ( Furphy WW1 HORSE-DRAWN water-tank end-plates)
|
escortinadriver
Deity
- Total Posts : 1278
- Scores: 115
- Reward points: 6097
- Joined: 2011/08/01 11:02:49
- Location: Vic Australia
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/11 13:33:29
(permalink)
I'm running the RX8 box in an auto tunnel mk2 escort.
It still needed some clearance with a hammer for the hydaulic master and the shift hole needed cutting further back.
Shaun.
'If I'd asked what people had wanted, they'd have said faster horses....' Henry Ford
|
BEE VEE
Scholar
- Total Posts : 1020
- Scores: 17
- Reward points: 3952
- Joined: 2014/01/02 15:53:02
- Location: MORNINGTON PENINSULA, melbourne
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/11 22:10:02
(permalink)
Cheers Shaun
assuming your Escorts running a 2L Pinto ? .....Are you experiencing any torque probs in overdrive at 80 kph ?
.......or what speed does it feel comfortable to drop into 6th ?
.........and does she cruise for hours at 110 in 6th with no issues ?
..........and how many k's has she had the RX8 box in for ?
sorry about all the Qs ! .......... promise Im not a cop !
"GOOD BETTER BEST: NEVER LET IT REST: UNTIL YOUR GOOD IS BETTER, AND YOUR BETTER, BEST" ( Furphy WW1 HORSE-DRAWN water-tank end-plates)
|
BEE VEE
Scholar
- Total Posts : 1020
- Scores: 17
- Reward points: 3952
- Joined: 2014/01/02 15:53:02
- Location: MORNINGTON PENINSULA, melbourne
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/11 22:17:03
(permalink)
GTV6
Oval and D port have the same torque and they all pull well from a crawl but can they sustain that much torque for long periods without over heating or excessive wear. Most 5speed conversions only drop the revs at 100k's by about 500rpm so Im not sure if it could handle a 6 speed. Would be nice to know.
Im happy to admit Im wrong, (Im used to it!), but I doubt the Oval and D Port V6 share the same Torque figure ................... someone here might have the figures to share, as i would be very interested to see the difference, which from memory was around 5 to 10% better in the D-port ?
"GOOD BETTER BEST: NEVER LET IT REST: UNTIL YOUR GOOD IS BETTER, AND YOUR BETTER, BEST" ( Furphy WW1 HORSE-DRAWN water-tank end-plates)
|
GTV6
Master
- Total Posts : 736
- Scores: 34
- Reward points: 5871
- Joined: 2011/08/01 11:02:49
- Location: Perth WA Australia
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/11 23:12:31
(permalink)
oval port 176 lb/ft @3000rpm - Ford workshop manual/Jeremy Walton book
D Port 174 lb/ft @ 3000rpm - Jeremy Walton Book
|
in rod we trust
Aficionado
- Total Posts : 447
- Scores: 4
- Reward points: 1985
- Joined: 2016/02/27 17:13:04
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/12 20:57:59
(permalink)
escortinadriver
I'm running the RX8 box in an auto tunnel mk2 escort.
It still needed some clearance with a hammer for the hydaulic master and the shift hole needed cutting further back.
Shaun.
be good to know what clutch you used and tailshaft etc what you had to do to get it in there please keep us informed and how it handles the box at speeds... is it a 2ltr twin bangers etc or cossie turbo.. sitting on highway in the capri 100 od ks at 3000rpm isn't very nice be nice at 1500 rpm at 110 ks id be happy all day doing that
|
escortinadriver
Deity
- Total Posts : 1278
- Scores: 115
- Reward points: 6097
- Joined: 2011/08/01 11:02:49
- Location: Vic Australia
- Status: offline
Re: 5/6 speed gearbox conversions in a bit more detail?
2019/12/15 21:42:17
(permalink)
Sorry for the late reply.
Unfortunately i'm probably not much help when it comes to info. The box is in a mk2 escort, auto tunnel behind a NA pinto. It was a bit of a test run, as the box will eventually end up in another of my cars behind a turbo pinto. I'm using a generic clutch master cylinder mounted to the firewall and attached to the standard clutch pedal. The box is in a rally/motokhana car so I cant comment on hwy use. As for tailshaft, I am using the factory mazda carbonfibre unit. It is the right length to the standard english escort diff. I used a locating ring in the centre of the tailshaft and redrilled the diff flange to suit. All a little agricultural, however I was originally building the as a paddoock basher using spare parts I had lying around for as little as possible. (I think the box was more than the rest of the car combined) There is a thread on here in the projects section mentioning the 6 speed in the title. I used one of freddys adapter plates from the UK and im using a CAE reduction starter.
So yes, not much help really, other than I'm using it and it works.... :)
Shaun
'If I'd asked what people had wanted, they'd have said faster horses....' Henry Ford
|