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240mm is smaller than a Davrian disc. They were 10.9" or about 277mm.
According to Tim you need disc and caliper sizes equal front to rear on early cars.
Recommended calipers were 14lf which are twin piston 48mm diameter.
If you stay Imp power are you going to keep the vent?
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Koos
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Hhmm shall have to think more on brakes then, I'm happy the discs will be big enough at 240mm,its a road car not a race car.
Just looked up the 14lf calipers and they are way above my budjet, not quite sure what to do now as i definately have more braking at the front.
The vent will scale down if it does stay, i havent thought about it much lately, i still think the look of the car woud benefit from the right design.
Cheers
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What about going with your current setup, but adding a brake bias controller or a proportioning valve (most utes have them), to adjust how much fluid is going to the front or rear? Then it wouldn't matter what size the fronts vs rears were, you could adjust to the best feel.
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Feb 10, 2014 13:29:29 GMT
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My Carter 998 powered mk 5 had drums all round and never needed more stopping power...
Girdling 14lf s are fitted to Heralds, Spitfires and Marinas (iirc) so should be ten a penny at autojumbles.
If you want lightness why not have a day out at the scrappies and find a single 48mm piston sliding caliper?
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Koos
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Feb 11, 2014 18:29:58 GMT
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I have no idea on actual sizes of pistons, but ive just reconditioned my Daughters BMW Mini coopers brakes...and the front callipers were about that size.......probably used in other BMW cars near you!
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I would be rich if i had not spent so much money on Cars and fast women...oh, i did waste some of it as well!
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Feb 11, 2014 20:18:13 GMT
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Feb 11, 2014 21:09:56 GMT
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impressive, man!
love the bushings too
JP
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I know its spelled Norman Luxury Yacht, but its pronounced Throat Wobbler Mangrove!
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Feb 12, 2014 11:04:31 GMT
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yeah pivot point reinforcement its great !
i've read some articles which claim drums actually perform BETTER than equivalent sized disks just due to surface area and self servo effect of leading shoe setup, this is purely braking effort of course.
disks are superior in terms of cooling, so whilst not as much stopping power, they will stop repeatedly without over heating, and also superior self cleaning, easier maintenance (pad swapping)
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Feb 12, 2014 21:05:26 GMT
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All kinds of awsomness going on here!!
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I would be rich if i had not spent so much money on Cars and fast women...oh, i did waste some of it as well!
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Feb 12, 2014 22:09:33 GMT
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Ford Fiesta track rod ends is a common Imp mod, you really should look in on the Imp Club forum as loads of Imp based advice available there.
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retired with too many projects!
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Feb 12, 2014 23:23:35 GMT
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I've seen a couple of handbrake options - 1 use hydraulics and hope the mot man is short sighted 2 some shoes that run inside the bell of the disc a la Porsche 944 3 a 90 degree lever pivoting off the caIeper mount with some friction material on o e end
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Koos
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Feb 17, 2014 19:43:09 GMT
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Hi all,
Sorry no pictures of progress but its much the same as you have seen before, more grinding! I have taken out the engine and box, the rear cross member is off and almost finished being cleaned up ready for seam welding. I have stripped out some old repairs from the cross member mount and today i spent the day grinding inside the pieces of mk3 front and rear, thinning itall down ready to piece it all back together.
After finally deciding on my engine setup, a 1020cc imp block with a kawasaki zx7r head fitted. I was also planning to add a supercharger and a turbo into the mix for fun, my aim was only around 130bhp but the big spanner in the mix at the moment is the transaxle. I don't think the imp transaxle will take it as standard and I'm looking at 1000's to have one built which is way out of my budget.
I'm feeling pretty lost on what to sling in the back of her now? because the thought of doing all this work and putting a standard (39bhp?!) 875cc imp engine in is pretty depressing. I'm really wanting to hear what other peoples thoughts are because my only idea left is bike engine but i really didnt want to go there.
Thoughts and opinions very much appreciated!
Cheers
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Feb 17, 2014 21:51:21 GMT
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sadly i havnt been able to really study this thread as my laptop/internet is really slow and the pics are taking forever to come up.
but, from what i can see it looks great! there was a guy at the himley classic car show last year (2013) who had one of these in silver, was really nicely turned out with split rims and a fancy motor, but i cant remember what it was now, nor can i find a pic of it!
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I'm pretty sure that it will be of no use...but there is a early 928 transaxle on ebay at the moment for £200.00 start but that uses a torque tube
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I would be rich if i had not spent so much money on Cars and fast women...oh, i did waste some of it as well!
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brawr
Part of things
Posts: 650
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Feb 18, 2014 21:38:06 GMT
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Great thread, have enjoyed your excellent work and documentation a lot!
Off the top of my head, would a VW t3 or similar transaxle work? Would expect that to be a lot beefier given the forces involved, and it turns in the right direction AFAIK. Ratios might be a bit poo for a performance car though. The other thing that popped into my head was that the beetle guys with Impreza engine transplants sometimes use Impreza transaxles too. There are reversal kits available for those boxes to reverse the direction of drive. No idea on costs there but should be plenty strong enough for your current engine plans...
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Feb 19, 2014 22:12:17 GMT
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You don't want a bike engine... How about a BMW flat twin?
The new one has oil cooled heads, makes 110hp and should be mountable onto an imp box....
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Koos
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What about a transaxle (and engine) of an early Renault 5? Right layout, 5 gears, and it bolts to (and can survive) a very light and very tuneable 5 GT Turbo engine.
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In regards to the imp transaxle your right in the sense that it will be the week spot but in the last 10 years of imp turbo ownership and fun ive only managed to smash one doughnut when dropping the clutch at 5k revs on max boost and then six years or so later dropped the diff inside a casing after coming out of the bottom corner at Curborough in second sideways at about 50mph with ten inch wide wheels at the rear!!
Basically if controlled and sensible then no problem I get going then floor it.
Only ever used std boxes that ive had stored in the garden untested lol.
In its prime my imp (at least twice as heavy as yours will be) was running around 120bhp at the wheels.
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Feb 20, 2014 19:32:49 GMT
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Cheers for the replys guys,
mdh, i did think about the bmw unit but to me it looks like there is alot of distance between the crank centre and the sump bottom, I'm pretty sure it will drag on the floor once fitted unfortunately.
Since reading into it more since my comments, i have come to the conlusion that deadlikeme above has posted, the imp box will be strong enough for my application. I plan to have a max of 120bhp at the wheels soim going to go ahead with building a 16v 1020cc imp engine, I'm going to supercharge it with a charger off a TSI VW engine.
No new pictures at the moment but work is continuing. I'm still die gringding out the front and rear panels and i have started to hot glue the many pieces of mk3 front back together ready for rebonding.
Cheers
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