JETFPV Donating Members 672 Member For: 17y 4m 28d Gender: Male Posted 26/01/08 06:01 PM Share Posted 26/01/08 06:01 PM Hi guy's im here to pick your brains, I have an 03 XR6T Auto with 91000k on the clock, (One 40s plus year old Dentist owner from new, and it only Had 84000 when I purchased it), only ever mod performed was by previous owner who told me he has had it flashed to 10psi and he gave me the box with the car, only mod I have done is fit a pod filter that's it..Anyhow I thought great been reading on here of every man and his dog making between 200-240s rwkw but upon putting it on a dyno recently just for interests sake it only makes 185rwkw, (Dyno Dynamic's dual retarder dyno in shoot 6 mode), now I have cleaned throttle body out, gapped the plugs, tightened all clamps, flushed boost solenoid, etc, it's reving out fine so it's not cat blocked but it's boost spiking to 10.1psi to be precise so the dyno say's, but the more it revs out on the dyno the more the boost drops and goes all the way back down to 5.5-6psi and stays there, no matter what its not holding the full 10psi through the whole rev range (Not sure if this is why low power?), so anyhow it's getting the full 10psi to the inlet manifold where it was Tee'd from for the boost reading so it's not leaking I would say, SO has anybody ever had this problem and if so any possible fix or solutions ?.There is no splattering, no fuel starvation, air fuel is spot on etc, its just not making the steam and im quite dissapointed after hearing what everybody else is getting.Any idea or things I should check??Cheers Link to comment Share on other sites More sharing options...
ENVY-T CNUTOX Donating Members 3,098 Member For: 22y 2m 27d Gender: Male Location: Not sure? Posted 26/01/08 08:53 PM Share Posted 26/01/08 08:53 PM Sorry to hear mate. If it is just a generic tune that was used, this could be the explanation. Alot of tuners pull boost and timing out to be safe, cos all our cars react differently to mods.Also check your turbo and manifold bolts. Other than that, as most will suggest, if you don't have a custom tune, get it done now. Link to comment Share on other sites More sharing options...
ZAP No boost, no bottle, just my foot on the throttle! Lifetime Members 7,935 Member For: 21y 1m 19d Gender: Male Location: Sydney Posted 26/01/08 09:38 PM Share Posted 26/01/08 09:38 PM Might be a silly question, but have you tried to flash the car yourself ?Have you tried the 8psi tune ?You might find it is running stock tune and this is why you are having the problems.It is not unusual to have the car bleed boost as revs increase. The best thing to do is get it custom tuned. Link to comment Share on other sites More sharing options...
Flukey Seriously Flukey Member Donating Members 4,354 Member For: 21y 12d Gender: Male Location: Melbourne Posted 26/01/08 10:17 PM Share Posted 26/01/08 10:17 PM (edited) Do you have JETFPV plates? Edited 26/01/08 10:18 PM by Flukey Link to comment Share on other sites More sharing options...
fordboy1981 Donating Members 2,075 Member For: 22y 2m 15d Gender: Male Location: Sydney, NSW Posted 26/01/08 10:24 PM Share Posted 26/01/08 10:24 PM Is it a custom or generic tune?with my old BA turbo the generic 10psi tune made 20rwkws LESS then stock...get a custom tune, you'll be very happy with the results Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 10m 13d Gender: Male Location: Sydney NSW Posted 26/01/08 10:58 PM Share Posted 26/01/08 10:58 PM Could be a very weak accuator, that can explain why it hits 10psi but drops off... the accuator may not have the strenght any more to hold the wastegate closed and keep boost up.These are not too expensive to buy but fiddly to fit, but the age of the cars points towards it... Id change it for a new one Link to comment Share on other sites More sharing options...
Tree Monkey Member 685 Member For: 17y 3m 24d Gender: Male Location: brisvagas / Manly Posted 27/01/08 12:40 AM Share Posted 27/01/08 12:40 AM what about valve springs?????????? Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 1m 26d Gender: Male Location: SW Sydney Posted 27/01/08 12:44 AM Share Posted 27/01/08 12:44 AM that is a good point tree monkey, but it should still be making power up to a certain point then staying the same, unless the springs are really stuffed! Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 10m 13d Gender: Male Location: Sydney NSW Posted 27/01/08 12:47 AM Share Posted 27/01/08 12:47 AM Nah, from what he's reporting, valve springs wont effect the power at that low range, and under those conditions. Link to comment Share on other sites More sharing options...
RHR BOOST Moderating Team 5,698 Member For: 21y 6m 28d Gender: Male Location: Southern Highlands NSW Posted 27/01/08 02:06 AM Share Posted 27/01/08 02:06 AM Pod filter... Why owe why.Is the filter enclosed in the engine bay??If iisnt enclosed youll be sucking in hot air. Go back to the pannel get a second air intake and a K&n filter Link to comment Share on other sites More sharing options...
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