My RB26 powered JZX81 Chaser

[Crosshatch]

Originally Posted by Stavros

Yep, sure is, just like all the Trust TD06s, T78s, and T88s everyone wanks over and pays two mirrion dolla for.
Tho mine will spool sooner, give better power, as its not some shit thing from the 70s.

How will it cope with higher revs?

[Stavros]

Jord- dont confuse emanage with emanage ultimate, totally unrelated barring the name. Cant remember exact details, but its way fancier than PFC.

Crosshatch- Turbos dont care what rpm the engine runs if its the right spec for the engine, they care what rpm they run. And a Holset can run at way higher boost and speeds with efficicency than even Garrett GT turbos, never mind crappy Trust turbos (ie Mitsubishi WW2 bomber turbos).

[Crosshatch]

Have you got a compressor map?

I found that revs do matter when coming to turbos, the t3 on my old crx couldnt keep up at 8500rpm

Im interested to see if it works properlly as I can imagine they are a hell of alot cheaper than the alternatives!

[Stavros]

Originally Posted by Crosshatch

Have you got a compressor map?

I found that revs do matter when coming to turbos, the t3 on my old crx couldnt keep up at 8500rpm

Yeah I have a compressor map, but that tells you a very minor amount of the story of what a turbo can to TBH, esp as there hundreds of variations with the same compressor wheel, same as all turbos.

And the CRX thing is not revs related still, thats turbo size related.

A T3 couldnt cope as whatever spec it was was too small. either the compressor or the exhaust side, either way, it was the wrong turbo for the engine if it was DEFFO the turbo that was the issue...

It not revs, just a 1.6 or whatever revving to 8500rpm meant the turbo you had was wrong.

[Karan]

i like the power fc on my sr20 commander cos of the display of knock etc which is useful on track (in terms of grip driving as during drifting there isnt really much time to look down start playing with it...whereas u can on a straight on a track.)

[Stavros]

IMO if you need to worry about knock ever, you need to go to someone who knows how to map properly.

[David Reid]

Stav

How does the ultimate work? Is is no longer just an AFM singal modifier (like the emanage)?

Can you now adjust fueling independant of ignition? Previously you moved fueling and the ignition moved with it, then you had to move the ignition back with another compensation making it a pain to map.

[Lead_foot]

Here what the typical emanage ultimate looks like:

Ultimate E-manage

[jrtuning_ben]

holset for the motherfricking win!!!!!

hurry up and get it fitted :whip:

ive been preaching holsets on sxoc for a while now

[mittomatto]

Originally Posted by Stavros

IMO if you need to worry about knock ever, you need to go to someone who knows how to map properly.

i dont agree stav... what if you cars mapped on a nice sunny day, 23* ambient, then come competition day its minus 3* ... a small ammount of adjustment and monitoring is a good thing imho. I checked knock after every run in the S14, i never adjusted timing more than 1*either way tho, its a very minor, but very effective way of keeping check on things and keeping your engine a little safer.

[Stavros]

IMHO, esp if you need to adjust the timing even 1 degree to stop det for whatever reason, you have had your car stupidly timed too close to the limit which is fricking stupid.

And its deffo been mapped wrong if it needs ign adjustment due to big changes in temp.

fricks sake, event the wankest ECUs have inlet temp sensors and are capable of compensating on their own.

Tho aside from the hillarious blinkers and tuner blowjobs ive seen in the Jap tuning scene in the UK, the hillariously shonky mapping is another thing ive always noticed, so this doesnt suprise me.

[Jord]

Originally Posted by mittomatto

i dont agree stav... what if you cars mapped on a nice sunny day, 23* ambient, then come competition day its minus 3* ... a small ammount of adjustment and monitoring is a good thing imho. I checked knock after every run in the S14, i never adjusted timing more than 1*either way tho, its a very minor, but very effective way of keeping check on things and keeping your engine a little safer.

Agreed, same here re: checking knock. Also its tricky to map a car whilst drifting [although a datalog can be done and then mapped afterwords] and therefore replicate the strains and loads on the engine during the different actions used in drifting. Therefore its always good to be able to adjust post-mapping to different conditions. The ideal situation [which very few mapper's offer - Sadler @ FCTuning will offer this] is to do primary mapping on road, tweak on dyno and then datalog during a drift day and tweak further to suit drifting.

[Stavros]

Why on gods earth would you do primary on the road and then tweek on a dyno?
No wonder it needs adjusting again after if they doing such stupid things, you cant even get close on a dyno barring good guesswork.

Either way, this is no discussion, you do what you want, ill do what i always do.

[Crosshatch]

Is it not better to tune ignition on a dyno?

[Stavros]

Its never ever going to be better at tuning anything on a dyno compared to the real world.

Dyno is good for getting it roughly there at first, getting the basics done if you cant do it all on the road, but the final tune will always be best to do on the road.

Thing is its easier for your average Joe to do it on some rollers, it takes more skill to be able to get it right on the road, but if you got that skill, the results are far better.

[Crosshatch]

How do you tune ignition on the road?

[Stavros]

Same as you would doing it properly on a dyno

[Jord]

Originally Posted by Stavros

Why on gods earth would you do primary on the road and then tweek on a dyno?
No wonder it needs adjusting again after if they doing such stupid things, you cant even get close on a dyno barring good guesswork.

Either way, this is no discussion, you do what you want, ill do what i always do.

I think I meant t'other way round, damn blinkers .

[Bon Bon]

I'll agree on the get it mapped right point, if you need to be watching and checking and correcting then it's not right or something's changed.

Greg's sorted my car for the last year and I don't need to worry, only time it ever saw nasty knock was when it got fuel starve. Even had the wastegate hose split and it saw something like 2.5bar very briefly without knock....errrrr....

[Stavros]

Sounds spot on Bon, thats the WHOLE fricking point of ECU's, map them PROPERLY and they are able to adjust themselves to various conditions, even the most basic ECUs do.

Intake temp and water temp compensating should be enough if the ECU is mapped right (ie unlike 99% of them), automatic compensating for knock (instead or as well as the first two) shouldnt even be needed if mapped right, never mind fuccking having to adjust it yourself.

The way Mitto etc is talking they may as well run twin carbs and clockwork ignition if they are having to adjust it for different weathers and shit.

Seems some are just doing it to get every last BHP out the car so the owner can go "woo look at me, 500bhp" than giving him 490bhp and a car that happily runs on pump fuel and doesnt blow up or need adjusting all the time.