XRPete Member 673 Member For: 17y 3m 16d Gender: Male Location: Here Posted 09/04/08 06:44 AM Share Posted 09/04/08 06:44 AM yer ok mines having trouble holdin 10psi at the moment. Mines comes on a little late if you ask me but I'm no expert. Could that be the cause? Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 7m 6d Gender: Male Location: Sydney NSW Posted 09/04/08 06:56 AM Share Posted 09/04/08 06:56 AM Also has alot to do with how hard to turbo has to push to get air through a system to reach the motor.Free up the turbo's breathing and alot of that lag goes away. Link to comment Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 21y 8m 26d Gender: Male Posted 09/04/08 01:59 PM Share Posted 09/04/08 01:59 PM You can try eliminating wastegate creep completely. I do it on external wastegates by having a pressure relief valve set at whatever PSI I want the gate to crack open. They help alot but actually too much as the boost hits the rear wheels too hard and sets them spinning where as when the boost comes on softish it gives the tyres a chance of grip. So I dont adjust it for it to come on so hard.A larger exhaust dump helpsTuning, advancing timing down low on an autoBeing a 4 valve engine it is gutless down low anyway so it does not matter what you do, it is just a characteristic of it. Link to comment Share on other sites More sharing options...
dule Donating Members 1,180 Member For: 17y 8m 10d Gender: Male Location: Sydney Posted 10/04/08 12:15 AM Share Posted 10/04/08 12:15 AM Strap a supercharger on it that shuts off as the turbo picks up, Might be a bit of an overkill butt.... if you really hate lag ..... Link to comment Share on other sites More sharing options...
hawlass Silver Donating Members 1,161 Member For: 17y 1m 17d Gender: Male Location: left right out Posted 10/04/08 06:01 AM Share Posted 10/04/08 06:01 AM Saw an artical a few years ago about a small eletric motor mounted directly to the shaft on the cold side of the turbo, with a one-way bearing connection. this allowed the eletric motor to spin up the turbo at idle and when the foot was planted, INSTANT BOOST!! Once over 2000 rpm the turbo was driven as normal by exhaust gasses and the one-way bearing allowed normal operation. A bit of back yard tinkering could yeild some interesting results...try goggeling turbodyne dynacharger-this is what I saw. Link to comment Share on other sites More sharing options...
Trough Lolly Member 4,349 Member For: 20y 3m 18d Gender: Male Location: Mildura Posted 10/04/08 03:57 PM Share Posted 10/04/08 03:57 PM NOS. Link to comment Share on other sites More sharing options...
hulk xr6t Member 160 Member For: 17y 2m 10d Posted 11/04/08 03:47 AM Author Share Posted 11/04/08 03:47 AM 4.11's will make the car feell "laggy" Compared to stock gears as you are taking load off the motor so you dont build boost as quckly. the upside is even with less boost the 4.11's will get the car moving quicker than the stock gears on boost. Th 2800rpm convertor wont be doing you any favours off boost.My 6 speed manual ute has 4.1's in it and in 1st and 2nd get around 6 pound at around 2800rpm. In 3rd and 4th I see 8 to 10 pound around 2500 rpm. Once it gets past six pound it boosts up to 15psi in the blink of an eye.if you want to get rid of the lag fit a hot side pipe kit, nizpro/process west/rapid pleum and pipe kit.that'l fix it Lukewhat is the hot side pipes gonna do? Link to comment Share on other sites More sharing options...
jared87 Member 85 Member For: 16y 9m 28d Gender: Male Location: Gympie Posted 15/04/08 06:50 AM Share Posted 15/04/08 06:50 AM Are cold side pipes such as rapid nizpro and pw better or worse for lag?? Im talking about the ones they do that come up the left hand side of the radiator, across the front of the engine and into the standard crossover. They must surely be longer than the standard route although these are the best cooler manufacturers building them?????????? Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 7m 6d Gender: Male Location: Sydney NSW Posted 15/04/08 07:10 AM Share Posted 15/04/08 07:10 AM Its not really a matter of length, but more of flow. Using larger diameter piping, as in mine which are 2.5inch, there is a better, smoother flow which can carry more air, faster.The factory rubber piping ( and really any rubber intercooler piping ) will start to soften with age and expand/contract on higher boost, which can also cause lag and spongy throttle responce.it's pretty common on turbo cars all over the world to replace these rubber hoses with alloy piping... commonly refered to as "hard pipes" by the US market.Factory turbo cars use rubber hosing as its cheap to manufacture, and does an ok job on factory boost settings...run higher boost and you really should upgrade the piping. Link to comment Share on other sites More sharing options...
BFHOON Donating Members 1,932 Member For: 18y 9m 2d Gender: Male Location: nsw Posted 15/04/08 07:22 AM Share Posted 15/04/08 07:22 AM getting back to the old,blow up a baloon with a straw and then blow it up with a maccas thick shake straw. Link to comment Share on other sites More sharing options...
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