kevmcdo
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| posted on 6/3/11 at 05:18 PM |
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Cross flow to R1 conversion.
Hi
I am in the final stages of getting everything together for conversion for my Locost from 1600 cross flow to R1 power.
One thing that I am wondering is what kind of weight saving fitting the new engine set up is going to give the car. The R1 is a 99 model and from what
I can gather weight wise is 79kgs, I am not sure what the weight for the 711m engine with 4 speed gearbox is?
The car at SVA was 525kgs so expecting to dip below the 500kg mark?
Kev
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TimC
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| posted on 6/3/11 at 06:46 PM |
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79 kgs sounds too high to me - it should be more like 66kgs I think.
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Yazza54
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| posted on 6/3/11 at 06:49 PM |
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It's gonna be on a new planet to your old xflow!
I'd imagine you'd dip below 500kg
I'm unhappy cos I eat and I eat cos I'm unhappy
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JoelP
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| posted on 6/3/11 at 06:57 PM |
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i bet you'd loose nearly 75kgs.
and crossflow to bec is indeed an eye opening change!
Beware! Bourettes is binfectious.
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Rallye_Mark
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| posted on 6/3/11 at 07:01 PM |
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Ive got a propshaft adaptor for sale for that style of R1 if your in need of one? 
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kevmcdo
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| posted on 6/3/11 at 07:21 PM |
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Thanks for the offer, adaptor already ordered.
I have seen reference to the engine weight being 60kgs but generally more referring to it being 79kgs?
Just taken the spare wheel and weighed that, 14kgs!?! that will not be going back on!!!!
I am hoping to see a fairly significant increase in performance, I had my crossflow on the dyno 2yrs ago getting the fueling set up and it was showing
99.5bhp at the fly wheel with if I remember rightly 75 at the wheels.
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Yazza54
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| posted on 6/3/11 at 07:26 PM |
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You should have about 125 at the wheels and I'd imagine 50kg or so less? Not sure what a type 9 weighs...??
I'm unhappy cos I eat and I eat cos I'm unhappy
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ashg
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| posted on 6/3/11 at 08:40 PM |
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type9 is 47.6kg weighed it when it come out
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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kevmcdo
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| posted on 6/3/11 at 08:48 PM |
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Was that the 5 speed box? I currently have a 4 speed box fitted.
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Rob F
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| posted on 8/3/11 at 03:58 PM |
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I weighed my 1300 crossflow when I removed it, complete with flywheel, clutch, inlet, twin choke webber and filter, sump. No exhaust or alternator
though. It was just over 100kgs, I guess the 1600 is slightly heavier as it has a taller block.
I have also just weighed a 1600 type 2 4 speed that I had in the garage - 27.3kg.
So say 110 for xflow with alternator + 27.3 4 speed = 137.3kg - 75kg R1 = 62.3kg saving (or whatever, if the R1 is less).
 
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a4gom
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| posted on 8/3/11 at 08:44 PM |
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Don't know what you use it for, I use mine on track for sprints and hills and I mounted mine as far back as I could thinking I was doing the
right thing and I've struggled with understeer ever since. If I was doing it again I'd definately put it as far forward as possible. In
reality you've probably only got about 6" to play with but it's worth it. Probably worth thinking corner weights at the same time.
Andy
Perfect planning prevents pi$$ poor performance!
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MikeRJ
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| posted on 8/3/11 at 10:09 PM |
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quote:
Originally posted by a4gom
Don't know what you use it for, I use mine on track for sprints and hills and I mounted mine as far back as I could thinking I was doing the
right thing and I've struggled with understeer ever since.
You sure that's not simply down to suspension set up? Moving weight forward will tend to increase understeer, just ask an Audi owner!
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kevmcdo
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| posted on 8/3/11 at 10:42 PM |
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Cheers that helpful on the weight front, the reduced weight of the engine and gearbox and spare wheel removal looks like I am going to be seeing a
healthy weight reduction.
I am looking to try and do some track days this year with the car, I have done a few in the past on Bikes but never in any form of car.
The car is currently running 300lbs springs at the front but I have a new set of 200lbs springs in the garage already, not sure if the will be too
soft or not?
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matt_gsxr
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| posted on 8/3/11 at 10:49 PM |
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You can save a lot of weight on the peripherals too.
A bike battery weighs about 4kg which is a good saving over a fully grown car battery.
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