John E Posted July 15, 2000 Share Posted July 15, 2000 I've just fitted a new competition side exit exhaust to my crossflow and I'm bloody sure that with two up its touching the ground on right hand corners. Any ideas, could it be spring rates or what. Link to comment Share on other sites More sharing options...
Jason Plato Posted July 15, 2000 Share Posted July 15, 2000 Try making a new side mounting bracke to raise the height of the can from the road . Link to comment Share on other sites More sharing options...
Jason Plato Posted July 15, 2000 Share Posted July 15, 2000 Try making a new side mounting bracke to raise the height of the can from the road . How fat is your passenger , sounds like a good excuse to drive alone ! Link to comment Share on other sites More sharing options...
John E Posted July 15, 2000 Author Share Posted July 15, 2000 AAAAAAAAAAAGGGGGGGGHHHH it is touching the deck. The manifold pipes dont allow for much raising of the silencer it seems. Ive moved the silencer mounting to the inner hole on the bracket but its pretty close to the body now. Surley the bloody thing shudnt sink so low on corners. The passenger is only 14 so weight isnt a problem. HELP HELP HELP Edited by - John E on 15 Jul 2000 19:52:49 Link to comment Share on other sites More sharing options...
Andrew Dent Posted July 15, 2000 Share Posted July 15, 2000 How did you get Angel status? Try going round only left hand corners. The RAC may help here. Andrew. Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted July 15, 2000 Share Posted July 15, 2000 I had the same problemIt all depends on which part of the 'can' is decking out. On my 'K' series I found it was the end of the tail pipe that was touching.I could feel the burrs on it! I therefore had to undo the clamp at the 4-1 section and adjust the bracket (with the rubber bobbin on it) to raise the pipe to a more horizontal position. Worked fine for me; result- no more grinding. Adjustment of the bracket angle was with careful use of a rubber faced mallet!!! Link to comment Share on other sites More sharing options...
John E Posted July 17, 2000 Author Share Posted July 17, 2000 It seems that the exhaust is ok but the clearance height is to low. Caterham recommend 155mm just in front of the rear wheel arch measured from the base of the chassis to ground. I've got the grand total of 135mm, so 70 profile tyres will help but it may be that the shockers are goosed allowing the car to roll. More expense. Link to comment Share on other sites More sharing options...
fastforward Posted July 17, 2000 Share Posted July 17, 2000 I had four aluminium spacers made up 'cos my 1990 xflow live axel rode low too. These were inserted at the base of the shocks and springs which are ok and voila less frequent grinding noise and all for £12.00 for the ali discs. Ride unaltered so far as I can tell, camber and toe in all ok too. Brian brianfyfe@ema.org.uk Link to comment Share on other sites More sharing options...
V7 SLR Posted July 17, 2000 Share Posted July 17, 2000 I thought even non-adjustable platformed springs had some crude adjustment. Something about a pin that can be removed and moved upwards...? Anyway, it's not the shocks that are goosed... it's the springs are either too short, too soft or a combination of both. Have you got a rear ARB? That would help reduce leaning.... Link to comment Share on other sites More sharing options...
John E Posted July 17, 2000 Author Share Posted July 17, 2000 I'm not sure about adjustment, I will have an idea tonight cos the bloody thing are coming off. There isnt a rear anti roll bar and I dont know about the length of the springs or stiffness. Is there a standard that I should measure against. Caterham want to sell me a set of adjustable Bilsteins but the two fron shockers have just been replaced so Im not keen to go down that route. Brian, Ive sent you an e mail Link to comment Share on other sites More sharing options...
Sid Spalding Posted July 17, 2000 Share Posted July 17, 2000 I had this same problem with my K-Series and a 4-1. I packed the rear cotton reel out with some extra washers - that gave it a few mill and rotated the whole exhaust (as the entrance pipe is not central) and that lifts it 10-15 mill. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted July 17, 2000 Leadership Team Share Posted July 17, 2000 Hi John, just worth checking, have you mounted the silencer on top of the rubber "bobbin", on top of the bracket? (if that makes any sence?). My exhaust was originally hanging from the bobbin, which was obviously in turn mounted hanging from the bracket. I had problems with the back end of the silencer grounding on bumps. Reversing the lot solved the problem, even with 185/60-13s. If memory serves me right your car sits guite low anyway? Stu. Link to comment Share on other sites More sharing options...
John E Posted July 18, 2000 Author Share Posted July 18, 2000 Hi Stu, yep all the bits are on ok, but the ground clearance aint good enuff. Taken the shockers off and they look and feel knacked. I also have 60 profile tyres which is a prob it seems. Next step is to replace the shockers and then look at the ride height. Going to try Brians suggestion first with some aley spacers and then lastly the tyres. When did you see the car last Stu. Link to comment Share on other sites More sharing options...
Andrew Russell Posted July 18, 2000 Share Posted July 18, 2000 I know that the 60 profile tyres do obviously reduce the ride height by a fraction but it really shouldn't be that marginal and I would suspect that after replacing the shockers and adjusting the ride height, the problem should be resolved.Tyre profile seems a very expensive route to attempt to cure this problem. I have always used 185/60x13 A021R's on my car which up until quite recently was set very low indeed and I only ever grounded the silencer on sleeping policemen and the rumble strip on the outside of Quarry Hairpin at Harewood,when I spun the car! What diameter silencer are you using? They range from 5" upto 7"? Could that be a factor? If you are replacing the rear shockers why not fit adjustable platform units and play with the ride height. My car is running at about 150mm from memory...and no grounding ( well, except for the sump!) Make sure the rear is higher than the front... Andrew. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted July 18, 2000 Leadership Team Share Posted July 18, 2000 John, Got a superb view at Portsmouth, although the ride height could have been be affected by all the confused 7ers stareing at the engine? Yours sits lower than mine, but not too low. If you're not having problems bottoming anywhere else ie. the sump, then why raise it? Try playing around with the silencer a little more? Surely you didn't have any problems with the old system? It may just be the combination of silencer, brackets, etc, etc. Have a good run in the Dales, Stu. Link to comment Share on other sites More sharing options...
John E Posted July 19, 2000 Author Share Posted July 19, 2000 The original rear exit had a 4inch box whereas the new beastie is 5inches. Amazing isnt it that just one silly little inch makes all the difference. Anna take note. Two new shockers en the way and expect to be fitted tonight. Stu send me your home number. Link to comment Share on other sites More sharing options...
Anna Rexia Posted July 19, 2000 Share Posted July 19, 2000 Quality not quantity John! Link to comment Share on other sites More sharing options...
John E Posted July 20, 2000 Author Share Posted July 20, 2000 Yep I know. And the quality in this instance is not sufficient to withstand even a modicum of friction. Link to comment Share on other sites More sharing options...
Jules Martin Posted July 20, 2000 Share Posted July 20, 2000 Anna, Glad to see your still with us. Surely if you have sufficient "friction" then the issue of "quantity" doesn't arise. If however you have "friction" and "quantity" and of course "quality", you should be constantly smiling !!! Enjoy "Le Sept", I'm really sad I can't join you guys but I'm Ferrari'ing at Zolder & Zandvoort then Nordschleiffe, Monday to Wednesday, and picking up my R500 from Hyperion, at Spa on Wednesday night. -It won't be the same however without you ! LOL, Jules Link to comment Share on other sites More sharing options...
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