18g, this is the problem, change to 16g and it'll spool faster but not by much (1-1.5k rpm difference i think). 18g is meant for 2.0 engines, even 1.8 will suffer huge lags. and u r boosting 0.4 bars, why? 18g needs high boost in order to function properly, it's hp orientated not response.

trust me, get the 16g and boost at least 0.6 bars, u already have lowered compression and a highly tunable ECU, a higher boost won't blow your engine. and 0.6 bars isn't really considered high boost, it's just.......standard

and whoever says short runners aren't good for turbo they don't know what they r talking about, i'll tell u, for response, THE SHORTER THE BETTER. Same like the intercooler piping, u don't want cuti-cuti malaysia piping that goes all around the world, it's a waste of metal, if i have a choice, i'll place my intercooler on top of my engine (like subaru did, they can because they use flat engine).....

and your camshaft is purely for high rpm performance, low to mid rpm will suffer like hell, if u want response change to other camshaft, it's no use if your boost kick in at so high rpm but your power band is so narrow

This post has been edited by stormlcc: Jul 9 2011, 02:00 PM

turbo is not like NA engine, it doesn't need "air pressure" or "back pressure" or whatever pressure to perform because the entire system is like a giant air sucking machine, so u need to prevent anything to "block" or "slow" air from going into the combustion chamber and going out from it to the exhaust, therefore, the shorter the better, no matter it is air intake or output

well long runners r used mostly for NA cars. there r tons of debate going on whether to use short or long runners for "everyday" turbo engines and most of them agrees on one thing, the shorter, the better for turbo, because there's less restriction, and less restriction makes good throttle response. And most of them agrees that whether it's short or long runner, it won't effect the spool time of the turbo by much, because the turbo's spool time is largely effected by how MUCH (volume) exhaust gas is available and the in/ex dimensions and materials used for/of the turbo itself. This debate has been going on for centuries and until now there is NO CONCLUSION AT ALL, some say orange but some say apples and these guys whether their apple or oranges, they r all professionals working with great tuning companies.

Because turbo engines are totally unlike NA engines (turbo setup is much more complicated), no one actually bothers to prove which one is better because there r too many variables, like the diameter of the piping, the setup of the engine, the design of the bending of the piping and so on, all can effect the end result. and for tuning companies, they always take the same engine to test their products (short vs long intake runners for example) but they NEVER announce / publish their findings (due to p&c), they only SELL whichever product they find "more beneficial", which for us, doesn't actually know all the facts like do the long runners actually make turbo spool faster? but they sell the short runners for "maximum performance"....! I do know this as a fact, VW, they make some excellent turbo engines, and their intake manifold are designed to have both the benefit of both long and short runners, for low end torque AND high end power at the same time, and tuning companies also copied the original design but made it SHORTER for.........."maximum performance" whatever this means....

All I know is from my experience, I CAN'T say u r wrong though because who knows (literally)? All we have are some apples and oranges from those experts, and all that we can do is trial and error

and where is TS anyway? from what i know, the main culprit is the 18g turbo which is TOO BIG for your engine, change that to a smaller version and it's all good

This post has been edited by stormlcc: Jul 10 2011, 07:07 PM

looks like this thread is a 2 person discussion since TS gone with the wind. what car and engine r u using anyway?

4efte is good enough, putting TD04 in it? in what chassis? i once thought i'll put this engine in my toyota LE, but at last decided to just go with the blacktop conversion since the halfcut price is the same (auto gb)

the LE is for everyday use for my wife, so both engines also a good choice, 1.3 4efte don't have much problem using RON95, blacktop can't use pure RON95, need to mix half RON97. but the FC really good on blacktop, sometimes can travel 9 days in 1 full tank, which is only RM60 (mix 50-50)

your hybrid turbo is from what turbo? still making the manifold?

of course can, but don't have time to go KL, install the ECU and dyno tune (which will take a whole day), and ipoh don't have tuning shops.....

anyway, beside unichip and adaptronic, do u know any other piggyback good for tuning to use RON95?

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Added on July 12, 2011, 3:29 pmat last got reply from TS. of course they want u to take the ball bearing, same like me last time when i go there for tuning...haha, few years back they highly recommend the GT3540 for my engine

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Added on July 12, 2011, 3:33 pmu should change back to TD04hl, since it works for u, just boost high a bit since u lowered the compression already, your 0.4 bar standard boost don't have any feel, 0.6 bar is quite ok for stock internals

u got a 16g? or u meant 18g? if u got extra cash to spend, u can always hybrid the turbo, go ask some experts like tong turbo, they know how to make a big turbo spool fast

This post has been edited by stormlcc: Jul 12 2011, 03:34 PM

from my knowledge, i think the TD04HL is the largest turbo in the TD04 series, correct me if i'm wrong. even subaru imprezzas (not the STI version) uses this, it's good up to around 250hp on flywheel on high boost on a 2litre motor, so TS u got lots of potential using the TD04HL, no need TD05 which is just a waste of revs

previously u dyno how many horses and torque u got from the TD04? and what rev achieves max boost?

This post has been edited by stormlcc: Jul 12 2011, 04:37 PM

wow, u already boost to 1bar on TD05, so why don't just boost the TD04 to 1bar? i'm almost certain u'll achieve similar figures much earlier on the revs. even if the hp is lower than 230hp, your full boost comes (much) earlier, the car will be more fun to drive

This post has been edited by stormlcc: Jul 12 2011, 04:55 PM

u already got hi-cams, cam gears, good ECU, what about your exhaust side? u ask gt-auto better, they r much more qualified than me

emanage incompatible with blacktop? how bout 1jz-gte....? i asked because my next project involving this

hey thundergod, i saw you r selling drift gauges, the boost meter only has psi values? no bar values? looks damn cool!

This post has been edited by stormlcc: Jul 12 2011, 05:36 PM