tucky40 Posted April 19, 2008 Share Posted April 19, 2008 Hi all, Just had the car mapped today (thankyou Matt and Ryan) in TTC with an AEM. Produced very nice figures at 0.8bar but apparently no real power was gained by increasing the boost above 0.8bar. This is strange as there was a noticable gain between 0.8bar and 1.2bar in sequential. Can anyone think why this would be?? could it be that my exhaust is too restrictive, I have the blitz nur spec RX, maybe the restrictor ring, boost leak or something else?? Any suggestions welcome, havent had a proper chance to discuss with Matt or Ryan yet as im away but the more advice the better. Thanks, Ben. Quote Link to comment Share on other sites More sharing options...
CarlT67 Posted April 19, 2008 Share Posted April 19, 2008 I was done there watching it on the rollers, really nice car you got there sounded awesome...! Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 19, 2008 Author Share Posted April 19, 2008 thanks mate, wish i could have been there too but unfortunately im away with work. bet it was a good day. Quote Link to comment Share on other sites More sharing options...
Muffleman Posted April 19, 2008 Share Posted April 19, 2008 Just to add to this, the car made 398bhp at 0.8bar on stock twins but with 256/264 cams. Ryan felt that the lack of increase in power over 0.8bar was due to the restrictor ring. I'm sure Ryan will be on later to add more Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 19, 2008 Author Share Posted April 19, 2008 Thanks for the rapid reply Matt, I'll keep my fingers crossed that its just the restrictor ring. It would definately be the cheaper option! Look forward to getting the car on tues. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 19, 2008 Share Posted April 19, 2008 It may be that the cams have affected how and where in the RPM range its making boost, so it is possible that the RR is now too restrictive. Quote Link to comment Share on other sites More sharing options...
Lee P Posted April 19, 2008 Share Posted April 19, 2008 Restrictor ring. Quote Link to comment Share on other sites More sharing options...
Muffleman Posted April 19, 2008 Share Posted April 19, 2008 Thanks for the rapid reply Matt, I'll keep my fingers crossed that its just the restrictor ring. It would definately be the cheaper option! Look forward to getting the car on tues. No problem matey, certainly a stout power level for 0.8bar ! It may be that the cams have affected how and where in the RPM range its making boost, so it is possible that the RR is now too restrictive. Yeah could be mate Quote Link to comment Share on other sites More sharing options...
CarlT67 Posted April 19, 2008 Share Posted April 19, 2008 Here is a little pic of you car before it was strapped down, sorry its low quality. http://xs226.xs.to/xs226/08166/roling_road_2387.jpg Quote Link to comment Share on other sites More sharing options...
razza Posted April 19, 2008 Share Posted April 19, 2008 looks nice:eyebrows: good output on stock twins, what other mods have you got bar the cams and FMIC? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted April 19, 2008 Share Posted April 19, 2008 Lovely Car Mate. The exhaust system is definatly the issue. As with more boost the car was alot more limited to ignition timing meaning that the cylinder temps were getting hot causing instantaneous explosives. Due to this, the timing was alot less in the higher boost area's which will cause no gain in power. I knew the restrictor ring would be an issue straight away though as in TTC mode with no duty on the solenoid it only hit 10psi. If it was my car i would keep your exhaust but open the RR up abit. Ryan Quote Link to comment Share on other sites More sharing options...
paul mac Posted April 19, 2008 Share Posted April 19, 2008 just a question mate, why go to all the expense of an AEM ecu to control stock twins Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted April 19, 2008 Share Posted April 19, 2008 just a question mate, why go to all the expense of an AEM ecu to control stock twins Future-proofing? I was using a Power FC at this level of tune. Quote Link to comment Share on other sites More sharing options...
Scott Posted April 19, 2008 Share Posted April 19, 2008 Is it not better for the TTC also? Means it can be mapped properly. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 19, 2008 Author Share Posted April 19, 2008 just a question mate, why go to all the expense of an AEM ecu to control stock twins I initially went down the Emanage Ultimate route for cost reasons really mate and i thought a standalone was overkill. With the more aggressive cams i had a pretty lumpy idle due to the fact that the piggy back wasnt controlling fuelling in closed loop. The stoich afr of 14.8 to which the stock ecu was pulling the fuelling on idle was cuasing a lumpy idle. Being a perfectionist this was a little annoying and i was told that with a standalone that the afr at idle can be leaned out a little towards 13s and this would make for a nicer idle. Also I had decided I wanted the car mapped in TTC, this is best done on a dyno so that timing can be adjusted etc. Ian C doesnt do dynos so my car would never have been mapped as accurately. I hope it also makes the car much more attractive when selling and also futureproofs the car if i decide to go sinlge. It was a big expence but I decided to pay the extra and get a better ecu, also you get knock protection with the Aem which could save my engine if something went wrong. I can now sell my AVCR boost controller as the Aem is doing bosst control. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 19, 2008 Author Share Posted April 19, 2008 looks nice:eyebrows: good output on stock twins, what other mods have you got bar the cams and FMIC? Hi mate, I have double de cat, Blitz nur spec RX, better plugs, FMIC, 650cc injectors and AEM. Thats it. Again I went for 650cc injectors due to cheekymonkeys experience with TTC, alot more injector duty than expected was needed when he initially had his car mapped. I wanted to build in a large element of safety and again futureproof the car to accomodate a small single in the future. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 19, 2008 Author Share Posted April 19, 2008 And of course cams, I went jun 256/264. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 19, 2008 Share Posted April 19, 2008 Seems odd that you should get a lumpy idle from 256/264, as its quite a mild combo and really shouldn't cause any problems on idle. Quote Link to comment Share on other sites More sharing options...
Wez Posted April 19, 2008 Share Posted April 19, 2008 I ran an AEM on stock twins and found it worked really well. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted April 20, 2008 Author Share Posted April 20, 2008 Maybe it wasnt the cams Tricky-Ricky but the fuelling never seemed happy in closed loop. Another reason for taking the EMU and stock ecu out of the equation. The lift on the jun cams was also a fair bit more than the hks ones. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 20, 2008 Share Posted April 20, 2008 I have no problems with my EMU running similar setup, rock steady idle, sounds like you may of just had lambda sensor problems. Quote Link to comment Share on other sites More sharing options...
letmeshowyou Posted April 24, 2008 Share Posted April 24, 2008 so cams and a remap (assuming all the other mods are 'supporting' - is this a fair assumption?) the car has seen an increase of over 70bhp from stock on the same boost levels? That's impressive - what would be the effect of cams with a stock ecu? Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 24, 2008 Share Posted April 24, 2008 Tucky has sent me his EMU to try in my own car, as it certainly displayed some spurious behaviour in his. I'll see if it acts up in mine, if it does it's the first one I've heard of going doolally but hey, it's electronics and cars If it doesn't then I've got no idea what was wrong as the datalogs I got off Ben were bizarre yet his car is (thankfully) running lovely now with the AEM. It certainly wasn't the usual issues of O2 sensor, MAP sensor, water temp stuff et al... A disappointing and frustrating episode for a thoroughly nice chap, glad it's OK now Get your nail file on that thar restrictor ring -Ian Quote Link to comment Share on other sites More sharing options...
stupra Posted April 24, 2008 Share Posted April 24, 2008 That's a great power figure for 0.8 bar . I'd like to get mine dyno'd at some point to see what mine's producing at 1.2 bar, I have similar mod's but use an EMU. Quote Link to comment Share on other sites More sharing options...
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