Doughie Posted October 2, 2001 Share Posted October 2, 2001 The FMIC is, frankly, a LOT of money to a lot of people. I'm not doubting it's effectiveness, bt just saying that to buy and install it's a high-priced piece of kit. Would anyone car to say exactly what the cost of buying/installing an FMIC is ? i.e. ALL in ?? not cheap........ Personally i've been running a total de-at UK spec with NUR-spec exhaust and bleed-valve at 1.2 bar for 6 months and it's been great. not saying an FMIC wouldn't be beneficial but you can get paranoid about these things I think. Quote Link to comment Share on other sites More sharing options...
GavinL Posted October 2, 2001 Share Posted October 2, 2001 Quote: from Doughie on 10:16 pm on Oct. 2, 2001[br]Would anyone car to say exactly what the cost of buying/installing an FMIC is ? I think my "S" type all in, has come to about £900. I agree it's not cheap I accept your point about paranoia. I am however prepared to err on the side of caution, especially as I plan on doing a fair few track days and I will be running the hybrids. Gavin Quote Link to comment Share on other sites More sharing options...
Doughie Posted October 2, 2001 Share Posted October 2, 2001 that's fair comment Gav. If you're getting Hybrids installed (as we speak) then it makes sense to get an FMIC in taht circumstance. Certainly i fi iwas getting hybrids, then the FMIC has got to be a part of the package for sure. I'm just questioning the absolute validity of doing an FMIC when you've got *stock* turbos etc. never a *bad* thing, (apart from increased lag) but with stock gear, the downsides (cost, turbo lag) may outweigh the extra security, potentially. but i'm no expert. All IMHO. Quote Link to comment Share on other sites More sharing options...
GavinL Posted October 3, 2001 Share Posted October 3, 2001 Hi... I guess water injection is probably a good compromise. I must confess to being unsure about the issue of lag and FMIC's. Some people say there is more lag and others don't. Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 3, 2001 Share Posted October 3, 2001 I know we are getting a little off subject here, but if you are suffering from extra lag, due to say an FMIC, can it be negated by turning the gain up on a boost controller, i.e. DSBC ?? Anybody done this ?? Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 3, 2001 Share Posted October 3, 2001 Turning the boost up would introduce more lag, technically. The previous level of boost would be acheived in the same time as before, but the new target boost would take a bit longer to acheive, ergo, more perceived lag. So basically, no. Turning up the boost would just generate more boost. More boost is caused by the turbos spinning faster, and they spin up at the same speed regardless of target boost level. -Ian Quote Link to comment Share on other sites More sharing options...
Flipfinger Posted October 3, 2001 Share Posted October 3, 2001 Anti-lag is the answer. Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 3, 2001 Share Posted October 3, 2001 Errrr Ian, i didn't say turn up the ratio, (ratio of overal boost) i said gain, i.e. how quickly you get to maximum boost. Now go to the back of the class and read that in silence :biggrin: (Edited by Martin F at 3:43 pm on Oct. 3, 2001) Quote Link to comment Share on other sites More sharing options...
Alex Posted October 3, 2001 Author Share Posted October 3, 2001 You still can only do so much to overcome the time it takes to presurize the system....just deonate some fuel in the exhaust. Its fun and will roast the odd car that gets too close...great way of getting people to back off Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 4, 2001 Share Posted October 4, 2001 Quote: from Martin F on 3:42 pm on Oct. 3, 2001[br]Errrr Ian, i didn't say turn up the ratio, (ratio of overal boost) i said gain, i.e. how quickly you get to maximum boost. Now go to the back of the class and read that in silence :biggrin: (Edited by Martin F at 3:43 pm on Oct. 3, 2001) Ah, I read what I thought I read, not what I read. I thought that maximum boost was achieved in a certain time no matter what, a function of turbine efficiency and exhaust gas flow speed and volume. How do you make it spin up faster with a boost controller? And what isn't it set at maximum already? -Ian Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 4, 2001 Share Posted October 4, 2001 Hmmmm you could be right, in that i guess that you can only spool the turbo's up in a certain amount of time, due to their physical limits. But at the same time the DSBC has two parameters, gain and ratio described as being the speed boost is built up and the final value of maximum boost respectively. Therefore i assumed (maybe wrongly) that by increasing the gain you could defeat any lag introduced into the system. The only problem with increasing the gain too much is that you can start seeing very high boost spikes. I wonder whether our resident expert has any opinions ??? Quote Link to comment Share on other sites More sharing options...
Alex Posted October 4, 2001 Author Share Posted October 4, 2001 Martin, Just wack the gain up to full.... go on be a devil! What's the worst that can happen :biggrin: Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 4, 2001 Share Posted October 4, 2001 I have to ask you guys loads of questions when i fit my spare turbo's. Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 4, 2001 Share Posted October 4, 2001 Fit them now, in parallel. If the lag is too bad, turn up the gain :biggrin: Quote Link to comment Share on other sites More sharing options...
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