frankyknuckles Posted April 15, 2005 Share Posted April 15, 2005 People have pointed out that there are flames to be seen from my exhaust on every gear change during acceleration. I can aslo hear loud pops coming from the exhaust on each gear change. Also, on over-run, flames are also seen (and pops and bangs etc). It would appear that it is time to re-pack my exhaust. My car is about 1 year old and has always been run with a de-cat pipe, 5000 miles including several track days. I have never used any kind of sealer around the 4 to 1 collector / decat pipe. What would be the best thing to use. Clear SIlicone sealant or exhaust paste ? I have not made any changes to my engine since new and the flames have only been evident this year. Is it likely that this is cuased by lack of exhaust packing and maybe the exhaust sucking in air from the un-sealed joins in the system? Obviously my car is running rich, but should I be concerned about anythig else being wrong ? Thanks www.R300.net Link to comment Share on other sites More sharing options...
R300XXX Posted April 15, 2005 Share Posted April 15, 2005 im only a novice so dont quote me on this, but flames usually means over fuelling? bet the chavs love it tho click here for out of date pics soon to be updated now with upto date pics C7 CYA Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted April 15, 2005 Share Posted April 15, 2005 Fantastic - that's one of the traits of my car when it was on carbs that I miss so much!! Prob is that it does blow out the stuffing from the exhaust. Raceco Cans have a mesh that minimises stuffing loss. I'm sure this could be mapped out on a rolling road if your ECU is programmable. Link to comment Share on other sites More sharing options...
frankyknuckles Posted April 15, 2005 Author Share Posted April 15, 2005 thanks, I'm just making sure that it's nothing serious. I'm re-packing the exhaust this weekend. www.R300.net Link to comment Share on other sites More sharing options...
Petrolhead Posted April 15, 2005 Share Posted April 15, 2005 Mr R5 pops and bangs Just love it I am going to repack it to help keep the noise down Does anyone have instructions for re-packing? R5 no 65 😬 Edited by - Petrolhead on 18 Apr 2005 09:43:39 Link to comment Share on other sites More sharing options...
Wingnonut Posted April 15, 2005 Share Posted April 15, 2005 Anybody wants instructions for repacking drop me a mail and I'll send them. Its a doddle really but a picture paints a thousand words as they say W.Nut . Rosso Superlight no.087 Link to comment Share on other sites More sharing options...
Myles Posted April 15, 2005 Share Posted April 15, 2005 Franky - don't you have an Emerald? If so, is the 'Fuel cutoff on overrun' enabled? Mine popped and banged like a nutter until I switched this on - I'd like a halfway-house (some pops/bangs, but not to the point where I worry for my can...) Project Scope-Creep is underway... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
frankyknuckles Posted April 15, 2005 Author Share Posted April 15, 2005 no mate, standard MBE. www.R300.net Link to comment Share on other sites More sharing options...
Rob Bailey Posted April 15, 2005 Share Posted April 15, 2005 Sounds great, how do I get the girlfriend's 1.4 polo to do that? Link to comment Share on other sites More sharing options...
C7 Posted April 15, 2005 Share Posted April 15, 2005 First thought - lucky bugger 😬 Practical advice - RTV High Temp silicone is the stuff to use on the joint. I just did it and it doesn't pop and crackle anymore ☹️, but I guess that means things are how they are supposed to be.... Good luck. Link to comment Share on other sites More sharing options...
Graham Sewell Posted April 15, 2005 Share Posted April 15, 2005 To para-phrase Monty Python and the life of Brian: You lucky ba*stard! Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
I reply to every thread Posted April 15, 2005 Share Posted April 15, 2005 "My exhaust is spitting flames on every gear change " Great - next question? Link to comment Share on other sites More sharing options...
Atinod Posted April 15, 2005 Share Posted April 15, 2005 My 7 does it too if you lift off quickly at quite high revs - sounds great, I love it! Reminds me of rally cars back in the early 80's spitting and flaming during the night time stages - it just adds to the fun! Link to comment Share on other sites More sharing options...
Jason Plato Posted April 15, 2005 Share Posted April 15, 2005 If its only doing it recently , you may want to get the calibration of the throttle pot checked ? It it nice to have but it realy shouldnt be doing it ....... Dave C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
frankyknuckles Posted April 15, 2005 Author Share Posted April 15, 2005 I'm having my MBE re-mapped in a weeks time. I presume the throttle pot (I have no idea what this is 😬) will be checked as part of the remap ? Dave - YHM re contacting Hellier www.R300.net Link to comment Share on other sites More sharing options...
silver-7 Posted April 15, 2005 Share Posted April 15, 2005 I can email you a copy of my MBE R300 map which i ran without the cat & 4 -1 exhaust if you like. car ran very well with it. cheers Alex Link to comment Share on other sites More sharing options...
Colonel Kilgore Posted April 15, 2005 Share Posted April 15, 2005 Didn't the Batmobile shoot flames from the exhaust?? 😬 I love the smell of petrol in the morning....it smells like, victory. Link to comment Share on other sites More sharing options...
frankyknuckles Posted April 16, 2005 Author Share Posted April 16, 2005 I can email you a copy of my MBE R300 map which i ran without the cat & 4 -1 exhaust if you like. yes please Did you have verniers fitted 🤔 www.R300.net Link to comment Share on other sites More sharing options...
martinwhitcher Posted April 16, 2005 Share Posted April 16, 2005 Franky, My advise would be, have verniers fitted BEFORE you go to the RR, otherwise it is not worth it!! Martin MW 51 CAT Superlight No.171 now know as:Superlight DVA 207 Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted April 16, 2005 Leadership Team Share Posted April 16, 2005 I had similar issues when I did some re-mapping of my Emerald. Problem solved by increasing fuelling at high rev/low load sites, ie. the ones you're at when you're revs are up and you shut the throttle to change gear. It's actually underfuelling rather than overfuelling - Dave Walkers book explains it all Stu. Link to comment Share on other sites More sharing options...
StewartG Posted April 16, 2005 Share Posted April 16, 2005 Yes I agree. Popping and banging and flames are caused by an imcompletely burnt fuel mixture meeting a hot exhaust which leaks fresh air in through its joints. The combustion can be incomplete due to weak or rich running as in either case the mixture is not being burnt optimally. Link to comment Share on other sites More sharing options...
silver-7 Posted April 16, 2005 Share Posted April 16, 2005 Franky, No problem... YHM just need your email to send map car ran standard verniers. Adam - YHM too !! cheers Alex Link to comment Share on other sites More sharing options...
silver-7 Posted April 17, 2005 Share Posted April 17, 2005 Adam, please could you email me again as I can not reply to your email, it just bounces back !! please send your email address in the text as well cheers Alex Franky, send map sunday evening Link to comment Share on other sites More sharing options...
dannylt Posted April 18, 2005 Share Posted April 18, 2005 Whoever does the mapping can either make it more crackly or less. I was previously a big fan of overrun explosions etc., but weigh this against having to repack the exhaust all the time to get through drive-by noise meters! Link to comment Share on other sites More sharing options...
frankyknuckles Posted April 18, 2005 Author Share Posted April 18, 2005 exactly. I'm also not an attention seeking person, the bangs and pops and especially flames draw attention that I don't really want. I'd rather just have a fast car with a smooth running engine. It will still sound great on full chat. www.R300.net Link to comment Share on other sites More sharing options...
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