3sgte tuning

[Heylin]

Probably your injectors are max ed out any way ??

Arent they 550cc on Gen 3 3SGTE ??

Im running 440cc and on 40% duty cycle getting 170 odd KW (running low 10psi boost at the moment and getting power tune at 16 psi soon)

440cc should be fine for 255-300 RWHP on 3SGTE.

[ihavelift]

injectors are big enough to cope with a pretty hefty load

[sergei]

550cc, yes they are big enough.

[®usty]

what I've seen people doing to there ST205 WA intercooler, is they put cool reflective tape on the bottom, to reduce heat soaked up from the engine.


oh and that 250KW was a WRC GT4, set up the water injection. (but doesn't apply to this GT4)

[iOnic]

If there was any more misinformation in this topic........ Carry on.

[JustinSpiderholden]

If there was any more misinformation in this topic........ Carry on.

How is this topic missinforming this person?

[MR2SIK]

Pretty sure nzefi worked on a celica using factory gen3 injectors, that car saw in excess of 400hp. factory fuel pump would be the first restriction in the fuel system.

[ST205 GT4 NZ New Group A]

Yes I fought going air to air for 4 years - and then reluctantly went to air to air.

From my personal experience- that is someone that

1.owns a st205 and
2.has had both setups, it was one of the best mods that I ever did

Better response, quicker to rev, more power (air to water seems to get heat soak and pull back the power sometimes) -better full stop.

Also my end tanks are blacked out so no to the bragging rights - always looking for the standard look !

[Akane]

If there was any more misinformation in this topic........ Carry on.

+1

[Prymal]

hmm mis information fun - but one more comment from someone whos had both WTA , and FMIC setups on a 205 ( and 185 )

The car in question rusty - is Franks group a ( ST205 NZ NEW REALLY LONG NAME )

he owned both my car , and his current car at the same time at once ..

mines basically stock engine ise , but has a larger turbo , and a better exhaust system , and bat for a bad leak somewhere - it still gets up and boogies near as well ss the WTA setup it origi9nally had , But ith a little less response , I sacraficed crispness for ease of maintainance , and later power goals.

Ive also owned a modified St185 Widebody with a decent amount of power , and the frontmount on that was much much nicer to live with.

Personally im a fan of the FMIC .. they are easy to work with , and simple to maintain ..

A hose blows - you replace or re do the clamp ..

A wta pump goes for a group A, or a sensor dies , or you get a split in the core on top of the engine , you cry .

Ive kept my car in such a way if that it wanted to be reverted back to original setups , it still can but i see this car being in my hands for a while yet , so FMIC for the win .

[Akane]

FMIC is less complicated, weights less. But there's no point of shelling out some decent coins if you're not pumping out some crazy power.

And there's a lot of mis-information about the size of injector vs the power output (on factory FPR), All I can say is the figures given here so far is a bit too optimistic.

[sergei]

FMIC is less complicated, weights less. But there's no point of shelling out some decent coins if you're not pumping out some crazy power.

And there's a lot of mis-information about the size of injector vs the power output (on factory FPR), All I can say is the figures given here so far is a bit too optimistic.

Well, here how I see it. ~200kW atw (torque performance dyno) is achievable with 440cc injectors, with reasonable AFR.
Look at my graph:
http://i26.photobucket.com/albums/c140/ ... 001_sm.jpg

With 440cc injectors, factory fuel pressure (mines ST185 ECU), gen1 engine, the peak power is at ~11:1 AFR (178.8kW at four wheels).
With better tune it would be in 200kW.
I am not sure what was the duty cycle on my setup, but I fairly certain it was under 85% (I don't think ECU would drive them above that).
With Gen3 engine (much better head, cam profile and manifold), good tune and 550cc injectors is very capable of 200-250kW.

[Akane]

Since we're on the same dyno. Here's my plot:

http://lol.co.nz/temp/NOGRIP_Dyno.jpg

I only made 218kw with 540cc injectors, 12.5:1 AFR and it was around 88% injector cycle. A lot of other people on mr2oc who has 440cc will max out their injector around 250hp, when I hear people make 250kw on 540's on factory FPR with a conservative tune of 11:1 AFR, I find it hard to believe, must be a magical tune.

[Hazard]

Hi does anyone know if an ST205 can run 98 Octane without needing to be tuned for it, i looked over some stuff but couldn't really lock down wether it would self tune or not, something about an ECU, blah blah blah, also if this has been covered elsewhere, could someone point me in the right direction, thanks

[sergei]

Hi does anyone know if an ST205 can run 98 Octane without needing to be tuned for it, i looked over some stuff but couldn't really lock down wether it would self tune or not, something about an ECU, blah blah blah, also if this has been covered elsewhere, could someone point me in the right direction, thanks

Yes it can, ST205 is "tuned" for 100 octane (base map) , unlike most cheap aftermarket ECUs, factory ECU will self adjust to the fuel you put in.

[Hazard]

Hi does anyone know if an ST205 can run 98 Octane without needing to be tuned for it, i looked over some stuff but couldn't really lock down wether it would self tune or not, something about an ECU, blah blah blah, also if this has been covered elsewhere, could someone point me in the right direction, thanks

Yes it can, ST205 is "tuned" for 100 octane (base map) , unlike most cheap aftermarket ECUs, factory ECU will self adjust to the fuel you put in.

Awesome thanks, now i just gotta find the right thread for a clutch question,

[sergei]

Hi does anyone know if an ST205 can run 98 Octane without needing to be tuned for it, i looked over some stuff but couldn't really lock down wether it would self tune or not, something about an ECU, blah blah blah, also if this has been covered elsewhere, could someone point me in the right direction, thanks

Yes it can, ST205 is "tuned" for 100 octane (base map) , unlike most cheap aftermarket ECUs, factory ECU will self adjust to the fuel you put in.

Awesome thanks, now i just gotta find the right thread for a clutch question,

Search, start your own thread, or hijack this thread

[Heylin]

I only made 218kw with 540cc injectors, 12.5:1 AFR and it was around 88% injector cycle. A lot of other people on mr2oc who has 440cc will max out their injector around 250hp, when I hear people make 250kw on 540's on factory FPR with a conservative tune of 11:1 AFR, I find it hard to believe, must be a magical tune.

I dynoed 190KW (255HP) (Speedtech Dyno) at 11.2 AFR @ 16psi on Ct20b (440cc Injectors) 96 Octane, Stock ECU, Failing Fuel pump flowing less than 180LPH.

Currently im running a mild tune on the link G4 with 12 psi boost and the injectors are at 40% duty. Still makes about 160-170KW with 12.4 AFR.

My tuner reckons hand on heart with the next planned tune of 16-19PSI boost we will easily break 200KW and still not max out the 440cc injectors, ie it will be safe and reliable power.

Note On the stock setup with the new fuel pump we were getting 10:1 AFR on 19 PSI so to max out the stock 440cc injectors the boost would have to go well beyond 19PSI to lean it out. I think injectors maxing out would be the least of your worries if the engine wasnt built or maintained to the point where >19 PSI was safe.

Isnt the max reliable boost for CT20b like 21 PSI anyway ?

[sergei]

I only made 218kw with 540cc injectors, 12.5:1 AFR and it was around 88% injector cycle. A lot of other people on mr2oc who has 440cc will max out their injector around 250hp, when I hear people make 250kw on 540's on factory FPR with a conservative tune of 11:1 AFR, I find it hard to believe, must be a magical tune.

I dynoed 190KW (255HP) (Speedtech Dyno) at 11.2 AFR @ 16psi on Ct20b (440cc Injectors) 96 Octane, Stock ECU, Failing Fuel pump flowing less than 180LPH.

Currently im running a mild tune on the link G4 with 12 psi boost and the injectors are at 40% duty. Still makes about 160-170KW with 12.4 AFR.

My tuner reckons hand on heart with the next planned tune of 16-19PSI boost we will easily break 200KW and still not max out the 440cc injectors, ie it will be safe and reliable power.

Note On the stock setup with the new fuel pump we were getting 10:1 AFR on 19 PSI so to max out the stock 440cc injectors the boost would have to go well beyond 19PSI to lean it out. I think injectors maxing out would be the least of your worries if the engine wasnt built or maintained to the point where >19 PSI was safe.

Isnt the max reliable boost for CT20b like 21 PSI anyway ?

My CT20b saw ~2bars multiple times when I had boost creep problem.

[ihavelift]

sergei how'd you solve your boost creep problems?