Hairy1 Posted August 5, 2008 Share Posted August 5, 2008 k chaps,installed decat and stainless manifold along with new gaskets, i now have slightly less power and a quieter ehaust note (brand new std turbo too)i still have the standard exhaust system, anyone know whats happening here???? Quote Link to post Share on other sites
StarletRick Posted August 5, 2008 Share Posted August 5, 2008 checked the boost?actuator may not be installed properly. Quote Link to post Share on other sites
Glanza-Love Posted August 5, 2008 Share Posted August 5, 2008 check everythings locked up TIGHT!run the engine and chek if you hear any blowing! Quote Link to post Share on other sites
WallaceGlanza Posted August 5, 2008 Share Posted August 5, 2008 Have you got a boost gauge, with the free-er flowing mani and decat you may have a bit of a boost drop, or just a leak.What sort of boost control do you have? Quote Link to post Share on other sites
Hairy1 Posted August 5, 2008 Author Share Posted August 5, 2008 Have you got a boost gauge, with the free-er flowing mani and decat you may have a bit of a boost drop, or just a leak.What sort of boost control do you have?i only have the standard boost gauge to go by but it appears to boost all the way.currently have the solenoid bypassed but i can re-install the hi/lo if needed.the actuator came fitted to the OEM turbo complete so should be fine?its kinda hesitant at the bottom end now and i get a small amount of whitish smoke when idleing for a while-the very reason i changed the turbo!!(albeit it used to be lots of smoke..) my best guess is that the stainless manifold gets much hotter than the standard cast one-heating up the EFI pipe,indeed i made an alloy heat shield which helped a small amount.i was going to route a new intake pipe in front of the rad but was told i'd get boost creep?? how does this manifest itself and ultimately is it a bad thing as there seem to be different ideas on this one ;) Quote Link to post Share on other sites
WallaceGlanza Posted August 6, 2008 Share Posted August 6, 2008 i only have the standard boost gauge to go by but it appears to boost all the way.currently have the solenoid bypassed but i can re-install the hi/lo if needed.the actuator came fitted to the OEM turbo complete so should be fine?its kinda hesitant at the bottom end now and i get a small amount of whitish smoke when idleing for a while-the very reason i changed the turbo!!(albeit it used to be lots of smoke..) my best guess is that the stainless manifold gets much hotter than the standard cast one-heating up the EFI pipe,indeed i made an alloy heat shield which helped a small amount.i was going to route a new intake pipe in front of the rad but was told i'd get boost creep?? how does this manifest itself and ultimately is it a bad thing as there seem to be different ideas on this one ;)Well the smoke could just be any residue that was one the new mani and decat burning off, most do this when just fitted, however if it doesn't stop fairly soon then I'd start looking for a problem elsewhere.I'd advise getting a boost gauge first before doing anything else, so you know what the boost is running at, then also at the least an hks actuator to give you more control over the boost. The reason it may not feel as quick anymore is probably because you've had a slight boost drop and are maybe getting a little more lag with the free-er flowing exhaust, the hks actuator should help this, it'll definately make it feel quicker anyway. Quote Link to post Share on other sites
Glanza_cl Posted August 6, 2008 Share Posted August 6, 2008 totally agree ^^^ you shouldn't try and up the power of the car without knowing what you are boosting at, definitely get a boost gauge even if its a cheapish one of ebay it will do the trick, then get a hks actuator fitted this way you can adjust your boost using the actuator and see what is boosting at using the boost gauge, if this doesn't even out the loss of power there is a problem somewhere else Quote Link to post Share on other sites
WallaceGlanza Posted August 6, 2008 Share Posted August 6, 2008 I wouldn't recommend just a cheap gauage off ebay, bill who I just sold my old autometer gauge to noticed a 0.2bar difference between the readings on the gauges, his old one was a cheapo off ebay. ;) Quote Link to post Share on other sites
Glanza_cl Posted August 6, 2008 Share Posted August 6, 2008 I wouldn't recommend just a cheap gauage off ebay, bill who I just sold my old autometer gauge to noticed a 0.2bar difference between the readings on the gauges, his old one was a cheapo off ebay. ;)well i didnt mean mega cheep i said 'cheepish' i have an autogauge boost gauge it's not the best gauge in the world but i find it to be very accurate and there not to exspensive. Quote Link to post Share on other sites
turbodailydan Posted August 6, 2008 Share Posted August 6, 2008 just putting a decat and exhaust system on my misses stock gt made quite alot of difference, sits at 9psi on full chat and then drops a tad at high revs (stock actuator) next mod is the mani,although cant see how its ganna make it slower, i can understand there being slightly more lag with the uprated mani as ive noticed that before on my old gtir and evo 3,usually because the runners have a longer run and have a larger internal dia than the stock mani. you will prob notice it pulls better at high revs though Quote Link to post Share on other sites
Hairy1 Posted August 6, 2008 Author Share Posted August 6, 2008 totally agree ^^^ you shouldn't try and up the power of the car without knowing what you are boosting at, definitely get a boost gauge even if its a cheapish one of ebay it will do the trick, then get a hks actuator fitted this way you can adjust your boost using the actuator and see what is boosting at using the boost gauge, if this doesn't even out the loss of power there is a problem somewhere elsei see what your saying chaps, i have a toytuning actuator on order (for some time)which they said was in stock but after giving my details i havent heard anything ,i even tried pm'ing toby but i havent heard back still,are they on holiday or should i start 2 worry?- ive had no problems in the past dealing with TT.still got a small amount of whitish smoke at idle sometimes ,ive checked the coolant and pcv valve whats left? hope its not rings or sumpthin major :-( Quote Link to post Share on other sites
keirz Posted August 6, 2008 Share Posted August 6, 2008 check everywhere for air leaks mate. i had one on my decat the other day. my car was running like an absolute bag of shit. now ive fixed that its back to normal. Quote Link to post Share on other sites
Hairy1 Posted August 6, 2008 Author Share Posted August 6, 2008 check everywhere for air leaks mate. i had one on my decat the other day. my car was running like an absolute bag of shit. now ive fixed that its back to normal.i know what u mean,i had the egt probe fall out yesterday-you really know when its blowing and yea really ran like a bag-o-shit then but luckily it was still attached to the cable and had flicked up under the undertray-how lucky was that!! ;) ..about the only luck ive had tho anyways ive triple checked 4 leaks since and no sign what now Quote Link to post Share on other sites
keirz Posted August 6, 2008 Share Posted August 6, 2008 maybe that damaged it mate? its a possibility Quote Link to post Share on other sites
Hairy1 Posted August 7, 2008 Author Share Posted August 7, 2008 maybe that damaged it mate? its a possibilityunfortanately the probe fell out after mate....:-(i keep changing the oil to as it starts to smell burned quite quickly,could that mean anything? Quote Link to post Share on other sites
carswelk Posted August 18, 2008 Share Posted August 18, 2008 Sounds like there isint enough compression of the exit gases. either a leak or a possibily of you system being too "free flowing" exaust systems work best under slight compression which aids transport of gases out of your exaust system. just had a look on the net and came across this. is your engine powerful enough to be puming out a decent amout of exit gases? a remap mite also help for various problems you have stated. hope this helpsjon Quote Link to post Share on other sites
Starletraje Posted August 18, 2008 Share Posted August 18, 2008 is it definately smoke? or is it unburnt fuel vapour, no cat means this now comes out the exhaust, so if thats all it is it aint a problem Quote Link to post Share on other sites
keirz Posted August 18, 2008 Share Posted August 18, 2008 Sounds like there isint enough compression of the exit gases. either a leak or a possibily of you system being too "free flowing" exaust systems work best under slight compression which aids transport of gases out of your exaust system. just had a look on the net and came across this. is your engine powerful enough to be puming out a decent amout of exit gases? a remap mite also help for various problems you have stated. hope this helpsjonthis is very unlikely as he has stock exhaust system in place. Quote Link to post Share on other sites
carswelk Posted August 19, 2008 Share Posted August 19, 2008 This is true, however a remap may help. Quote Link to post Share on other sites
Hairy1 Posted August 19, 2008 Author Share Posted August 19, 2008 interestin ideas folks,so far as i can tell theres hardly any smoke now and having driven it for a while with the mods it feels like it has less torque certainly-judders a bit when u pull away and it never used to.it pulls for longer in gear tho probably letting u shift like 1000-1500rpm later without the power dropping off and according to the boost gauge seems to hit max boost faster but getting wheelspin in second gear is nigh on impossible were as it used to be a piece of cake so a fair difference i'd say.i live in the south and i cant find any performance related garages anywhere local- anyone know of any in winchester,romsey,eastleigh,hampshire in general would be a big help!! Quote Link to post Share on other sites
Si@Fiske Posted October 16, 2008 Share Posted October 16, 2008 get a decent boost gauge mate.. and i dont think you have an egt probe mate.. the top one is your lambda/ 02 sensor which determins your air fuel ratio.. if this is damaged your fueling could be all over the place.. smoke/ vapour indicating its running rich...on another note the bottom sensor is a cat temp sensor so having a decat i very much doubt that this is inserted..so just to confirm.. you have decat, stainless mani but still standard exhaust? Quote Link to post Share on other sites
scutch0 Posted October 17, 2008 Share Posted October 17, 2008 i had a boost drop after having my roadrunner mani fitted, and it did feel less powerful, but the main thing was that it felt less torquey Quote Link to post Share on other sites
Si@Fiske Posted October 17, 2008 Share Posted October 17, 2008 ^ i remember that day well lol Quote Link to post Share on other sites
scutch0 Posted October 22, 2008 Share Posted October 22, 2008 indeed... i felt pretty gutted actually, but all is well now! lol Quote Link to post Share on other sites
Hairy1 Posted November 11, 2008 Author Share Posted November 11, 2008 get a decent boost gauge mate.. and i dont think you have an egt probe mate.. the top one is your lambda/ 02 sensor which determins your air fuel ratio.. if this is damaged your fueling could be all over the place.. smoke/ vapour indicating its running rich...on another note the bottom sensor is a cat temp sensor so having a decat i very much doubt that this is inserted..so just to confirm.. you have decat, stainless mani but still standard exhaust?just back from my hols yay!yes i have all of the above (i think your right-must be cat temp,its defo bolted into the bottom of the decat tho) Quote Link to post Share on other sites
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