Barry H
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Everything posted by Barry H
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For what it's worth I am very pleased so far with 195 SO2's on 15" wheels compared to 185 RE720's on 13" (despite the extra 2.5 kg per corner). However......I also changed dampers and front camber so an improvement of .9 sec on a Curborough single lap may not all be down to tyres. That said, the car feels more planted and the turn in is better. I wouldn't knock the RE720 - just look at Dave Jackson's times on 13" 720's - I just hope he never uses SO2's. Barry
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Paul, not you as well! But how would I know you really knew? I could be giving up all future glory for nothing. Aint life difficult. Barry
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Hmmm and it uses a conventional gearbox. Interesting. Let us know when it is off the top secret list. Barry
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Chris, Curiosity gets the better of me! What is your new engine that only weighs 45 kgs including carbs? Half a X-flow? Barry
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Here I am Graham - a day late but I had to get to Curborough yesterday for a sprint. Lovely day! Yes I went to throttle bodies, dizzyless, etc., just over a year ago. Cost about Oily's estimate. Benefits much as those claimed for 3D - very tractable (drives cleanly from 2000revs in 6th gear through to 8500+ on a 254 cam), instant throttle response and a lovely noise. I can't comment on the 3D but if it is only 80% as good as throttle bodies at half the price then it is probably better value. Either way is an improvement. Barry
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ARB disconnection is an interesting point. Philosophically I have difficulty understanding the need to disconnect for the following reason:- If the car is set up, as say Allan's is (bricks et al) with the ARB disconnected, as soon as Allan (or bricks) get into the car with the ARB reconnected the corner weighting will be different from the set up with the ARB disconnected. This must be the case because the front ARB is resisting the twisting caused by Allan's weight by weighting up the front wheels differently. Therefore to my mind it would seem logical to set up the car with ARB connected as that is how it will run, pre-load and all. I am sure I must be wrong so can someone please explain. Barry
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Hugh, You have mail. Barry
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There are two possible adjustments - You can insert a couple of washers between the engine mount and rubber either side of the engine to twist it slightly as suggested in the build manual. Or you can rotate the steering rack slightly to raise or lower the steering column - don't overdo it or the steering becomes stiff. Barry
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My manual agrees with Ian's! However it also gives an inset of 19mm for a 16x7 HPC wheel with only the 15x6.5 at 13mm. I suspect that this is an inexact science. At the rear the wider the track the better provided it doesn't foul the wheel arch. At the front I assume considerations of steering geometry must effectively limit the amount of inset possible. Hopefully someone who knows what they are talking about will come along soon. Barry
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As I recall the different wheel sizes and offsets were listed in my build manual in the competition section. Certainly the standard 13" is 23mm. I'll have a look this evening. Barry
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Yes, the Escort axle is slightly narrower than the Ital - from memory, about 3/4 inch. Barry
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Hi Chris, You have mail. Barry
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Hi Carrie, You have mail. Barry
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Thanks. Sounds like a job for next year or perhaps the year after!!! Barry
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I have never thought to change bushes. What frquency is recommended and how are the old ones removed? Barry
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Secret weapon Graham!! Got to try to give you a run for your money in May as I'm sure you have continued to develop your engine/suspension/tyres/transmission. Barry
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John is a gentleman and it will be a good home! Barry
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I don't think so but ring Caterham parts and they will give you a definitive answer. Barry
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In my case the situation was as Paul suggests. When you order the 6 speed box you state the engine it is mating with and the appropriate shaft is supplied. No sawing, no drilling. Barry
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Rest easy. It is not an engine out job. At worst you may have to ease the engine and gearbox apart slightly to get to the end bolts holding the sump. Otherwise it is merely fiddly. Good luck Barry
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Peter, thanks for the explanation and confirmation. Barry
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Fascinating. I think I understand about 10%. However, with an adjustable front arb where the adjustment is only possible on one side, is there a jacking effect here also? I always assumed not because the arb rotates and because it is not a function of length but of the stiffness of the adjusting arm. But now I have doubts. Any thoughts? Barry Edited by - barry h on 12 Dec 2001 15:46:03
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Thanks to everyone for their info. More questions, I'm afraid. David, Apart from the A-frame mod is the location and fitting of your axle exactly the same as for the Ital? As well as the additional strength, the reduction in unsprung weight is a significant consideration. Did HT produce from scratch or did they modify your existing axle? Cheers, Barry
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chris Your point is well made. Incidentally when I switched from Ital to Ford I estimated the ford axle was about 10 kg heavier. I suspect it all comes down to the external bracing. My Ital and Ford axles both had exactly the same bracing. However the HT Racing creation seems to have a lighter form of bracing which might put it back on a par with an Ital braced in the usual Caterham way. I have not yet changed diff ratios but may need to for next season. Is it a simple job or does it entail removal from car and special tools etc? Barry
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Chris, you and I have had this discussion before and whilst I bow to your superior knowledge on axle design it does seem likely that a car about half the weight of your RS2000 is likely to be much less harsh on the whole unit. Barry