faster spool up time
- Thread starter callumGT
- Start date
Franza1
Supermoderator & Area Reps Manager
I am indeed reaching full boost at around the 2.2k mark on a standard 4e and a JAM style ECU started boosting at around the 1.7k mark, most important thing by far to aid spool up is a good electronic boost controler and actuator, i was going to start messing around with the gain settings and a few more bits but i ended up badly kerbing the car, at the moment i have the whole exhaust system wrapped, including a turbo heat jacket, ported head, Zep 1.2mm gasket ( which dropped the spool up ever so slightly ) slightly bigger exhaust than i was running and i think i'll shorten the Intercooler piping as much as posable. John (madman) drove the car reciently so he can back me up on how quick she boosted.
as for the question first thing i'd look at would be the actuator
as for the question first thing i'd look at would be the actuator
not here
me too and i went the long route and i feel scared walking past my car going to work in the morning. and also the claw marks that have appeared in the steering wheel may need some attention in the near futuer
Texx
Super Moderator
What do you mean by lean? What was the AFR reading with 11psi @ 2,000rpm?
Guye
Lifer
I agree. I also get full boost (15psi) around 2000-2200rpm. It came down to the uprated actuator and the profecB spec2 ebc. After 3 days of adjusting gain settings I managed to get spool up from 1100rpm full boost by 2000-2200rpm. It's more like boost spike but then it holds at 15psi until redline. Good response but the drawback is the delicate throttle control needed to keep the wheelspin in check, especially on the wet. 1/8-1/4 throttle results in 10psi, so at a little under 1/4 throttle I have surpassed 180kmph. Gorganl2000, a reputable member, and the only other local who have be allowed to drive my car (it was once his) can verify all of the previous statements.
EDIT: some good info here as well... http://www.toyotagtturbo.com/forums/showthread.php?p=558277#post558277
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gorganl2000
Lifer
verified...guye's car just spools like there is no tomorrow....but as he says, then u have to deal with wheel spin, especially on the twisty country roads
and in relation to the member who mentioned the 5e ct9 set up....trust me, it also spools in the blink of an eye EVEN using the stock intake pipe, stock actuator AND stock boost controller (WITH 1st/2nd gear restriction intact) ....guye experienced this for himself also
here are the rules for spooling a turbo
- custom intake, custom exhaust, custom downpipe, custom manifold, aftermarket boost controller (ebc or mbc should do, but u will have more control with ebc), aftermarket actuator (better yet external wastegate), aftermarket air filter, shortest piping route for your intercooler, u might want to replace all your vacume piping and make sure your intercooler joiners are tight (maybe just to ensure u have no leaks)
also, the size of the vacume/boost hose may make a small difference
if u have $$$$
-get a tunable piggyback or standalone, as this can take the spool time down even further.as is common with aftermarket ecus (JAM, blitz, Mines, etc.)....due to ignition/fuel tuning
- port and polish--depends really, just to make sure there are no unmatched/rough ends
- mods to the turbo itself
PS--but then things get a bit tricky, as sometimes these mods lead to boost spike and creep issues
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nexia201
Member +
I dont have afr gauge fitted but car was pulling back with the ebc on (remeber i am running the engine on a stand alone so it will not adjust fuelling if running lean ) so had to take it off ( i will explain more i will open a thread)
Sheldon
Malta Area Rep.
wow 2.5k full boost! you make me wanna go ct9!
i dont know why and cant explain it myself but when using an MBC and just open it a bit to put it up by 1 or 2 psi it spools betetr then adjusting it from the actuator only!
was reading somewhere that polishinh the intake housing opf the turbo from the inside and porting it a bit will help with flow and a bit spool time too.
also some cut the exhaust side blades of the turbo for faster spool time! (cutback?)
i dont know why and cant explain it myself but when using an MBC and just open it a bit to put it up by 1 or 2 psi it spools betetr then adjusting it from the actuator only!
was reading somewhere that polishinh the intake housing opf the turbo from the inside and porting it a bit will help with flow and a bit spool time too.
also some cut the exhaust side blades of the turbo for faster spool time! (cutback?)
Guye
Lifer
From 2nd gear for me. In 1st anything above 1/4 throttle is pointless (just blipping the throttle to roll out of the driveway makes it chatter and dump). At 60 kmph I shift to second, play around with 1/4-3/4 throttle until 110kmph the full throttle from 3rd (slight wheel spin at shift) onwards. If I move off in 2nd (no revs before lifting the clutch) using 1/2-3/4 throttle I start registering boost pressure at 1100rpms the it spikes and holds at 15psi by 2200rpm the latest, resulting in violent wheel spin, plenty of blue tire smoke and wasted acceleration. I have long since learned to keep this in check but use the response to my advantage.
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munday
Member +
:rockon:
littletodd18
Member +
Cal it's not a leak, it's your actuator chap...
Before you bought the car a guy on here called starletgt.neal said he would sell me his standard actuator, so i done him a paypal payment and he never sent it, his PM box is full and doesn't reply to any messages so i think he's seen me coming tbh.
But yeah that's all it is, your actuator is designed to run higher boost then your running, thus the wastegate is open. Buy a standard actuator from someone on here and you will hit full boost at aot lower revs, but you won't be able to adjust it till you buy a boost controller.