daboss351 Member 20 Member For: 15y 6m 24d Gender: Male Location: Sydney, Australia Posted 18/11/10 12:32 AM Share Posted 18/11/10 12:32 AM Hi Guys I have a BA XR6T 5 speed manual it has had the valve springs done, 60lb injectors and, weapon X coils just fitted and also full X force exhaust with 4" dump and hiflow cat. On the dyno it shows it is making 245Kw at the wheels, when driving it seems to go very well up to about 4000RPM but after that it feels rather flat and just revs up to 5500rpm and no accelerating like it does before 4000rpm, feels like boost drop maybe any ideas??????? Link to comment Share on other sites More sharing options...
icer Banned 2,335 Member For: 15y 7m 5d Gender: Male Location: Aspendale, Vic. Posted 18/11/10 02:14 AM Share Posted 18/11/10 02:14 AM might have a boost leak somewhere do u have a intank fuel pump too? if so you should see 300rwkw+ or so Link to comment Share on other sites More sharing options...
daboss351 Member 20 Member For: 15y 6m 24d Gender: Male Location: Sydney, Australia Posted 18/11/10 02:35 AM Author Share Posted 18/11/10 02:35 AM (edited) I have just the standard fuel pump, Checked all the pipes.Could be clutch slip too but the mechanic said there was none.Seems to have boost though because when I lift off accelrator or change gears it has the usual blow off sound!!Yes I thought the output was fairly low for the mods. It had had a custom tune put in it too!!! the dyno shows it makes good power to about 4000rpm then it drops away sharply. mechanic says it could be the wastegate acutator. But I guess its just process of elimination. Edited 18/11/10 02:40 AM by daboss351 Link to comment Share on other sites More sharing options...
Banned1 Banned Banned 734 Member For: 14y 5m 10d Gender: Male Location: Caloundra Posted 18/11/10 08:45 AM Share Posted 18/11/10 08:45 AM I'd take it to local decent dyno guy and get map checked over ! Link to comment Share on other sites More sharing options...
Henz Tampon inserted, Auto Acquired, next purchase a new handbag Donating Members 9,946 Member For: 16y 11m 2d Gender: Male Location: Vic Posted 18/11/10 09:23 AM Share Posted 18/11/10 09:23 AM What psi is it tuned to? And what did it make on the dyno first? Could be a conservative dyno. Your Wastegate is probably maxed, or sticking. My guess is sticking. Link to comment Share on other sites More sharing options...
Jman The Cleaning Dudes Ute Silver Donating Members 1,308 Member For: 18y 10m 10d Gender: Male Location: Bentleigh, Vic, Australia Posted 18/11/10 12:16 PM Share Posted 18/11/10 12:16 PM My car is doing something very similar at 4000rpm - really starting to do my head in.In my car its very temperamental, sometimes I can punch it out... other times it gets to 4k, boost starts to drop back down to 8ish psi then starts to build again... but very slowly.Changing spark plugs this weekend and gonna clean the boost solenoid again. Last time I did the boost solenoid I didn't notice a tiny bit of difference though...not expecting that to be it.I think you might be right about the wastegate Henz. Link to comment Share on other sites More sharing options...
daboss351 Member 20 Member For: 15y 6m 24d Gender: Male Location: Sydney, Australia Posted 19/11/10 12:53 AM Author Share Posted 19/11/10 12:53 AM ok checked the car last night and found that the crossover pipe was not properly fitted to the throttle body - that solves the boost problems!!! car is boosting well now. mechanic told me he set it at about 13 psi, to my surprise the so called weapon x coils I requested had not been fitted :-( they charged me for them though!!!! so went back to mechanic this moring and he gave me coils Hope this solves the 4000rpm and over flatness. also I should mention when it does go flat over 4000rpm it pumps fuel out the exhaust pipes. Thanks for the sugestions guys. Will fit the weapon X coils tonight and see if they help. Will need the custom tune looked at again as it is most probably wrong as they would have tuned it with the air getting into the throttle body flange!!!! Doh haha Link to comment Share on other sites More sharing options...
daboss351 Member 20 Member For: 15y 6m 24d Gender: Male Location: Sydney, Australia Posted 19/11/10 12:58 AM Author Share Posted 19/11/10 12:58 AM BTW when first dynoed it was making 210 RWKW with just Xforce system and 8psi generic flash tune, after valve springs, and custom 13psi tune it was making 245 RWKW but with the air getting in the throttle body and no weapon X coils!!! not really a big gain dissapointing if U ask me Link to comment Share on other sites More sharing options...
spoolxr6 Member 312 Member For: 14y 3m 7d Posted 19/11/10 01:09 AM Share Posted 19/11/10 01:09 AM Get your tune checked ASAP now. Your A/F mixtures will now be leaner than what it wes tuned to prior due to you resovling your boost leak issue. You have now introduced an increased charge of air with now fueling adjustment to suit. This will give the vehicle a leaner mixture leading to detonation and then a damaged piston or throwing a rod. BTW where is the car being tuned at? Link to comment Share on other sites More sharing options...
daboss351 Member 20 Member For: 15y 6m 24d Gender: Male Location: Sydney, Australia Posted 19/11/10 03:46 AM Author Share Posted 19/11/10 03:46 AM yes I know the Air fuel ratio is not good now, the mechanic shop has offered to re tune for no charge as they should I think as the car was tuned with that crossover not connected properly!!!!! As for the weapon X coils yes this could have been just an honest mistake, what happened to the job card??? thought that these would have been added as they claim they changed the spark plugs. Took my car to CV performance as they have done quite alot of turbos and because they are close to me. They seem like a pretty helpful bunch of guys but I am a little dissapointed after this experience to be honest. Car goes back to them on monday morning hopefully they can redeem themselfs and do the job properly this time around. :punchhead: Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now