ok, so a few months later and I finally got around to installing and tuning my replacement SMT6.

there were a few air leaks that needed fixing (the TB gasket was leaking and a vacuum hose had split), but once they were fixed and a safe tune in place it all went to plan.

not quite what I was hoping for, but a decent gain all the way through the rev range of about 10-12 kw. tractive effort was up about 10% across the board too.

woot!

.wook

Nice job mate, looking good, be good to see what times you get?

good to see/hear

you will notice the car will be more consistant now too, not slow as stock one day and fast on the occasional cool night... just plain quick all the time..

take it easy!

168 ATW.

Nice Effort.

Nah, round it up to 169KW - sounds better :badgrin: ;)
Nice figures wookiee !!!

Nah, round it up to 169KW - sounds better :badgrin: ;)
Nice figures wookiee !!!
:stoopid:

cheers guys... the guy doing the final tune was tempted to squeeze 170 out of it, but erred on the side of caution, which is just fine with me. I don't wanna drop $5k on a rebuild a la TZABOY.

.wook

i was thinking at first wow thats lower than a vz commodore but then realised its atw, what would that be at the flywheel outa curiosity?

around 225kw i think

i was thinking at first wow thats lower than a vz commodore but then realised its atw, what would that be at the flywheel outa curiosity?

I'm thinking 250+, based on about 33% loss through the drivetrain.

next mod - MANUAL + LSD

I don't think I'm going to chase anymore power through the auto 'box.

cheers,
.wook

wow thats quite good for a 4 speed auto, congrats

f yeah wook! good stuff champ once you get that manual in as well :shock:
you better be coming sat so i can see this bad boy! :bowrofl:
hedgie

I'm thinking 250+, based on about 33% loss through the drivetrain.

next mod - MANUAL + LSD

I don't think I'm going to chase anymore power through the auto 'box.

cheers,
.wook

DO IT!!!!!!

f yeah wook! good stuff champ once you get that manual in as well :shock:
you better be coming sat so i can see this bad boy! :bowrofl:
hedgie
I'll be there mate... we need to sort some stuff out for March (MM08).

I might even take you for a spin. :D

I'm thinking 250+, based on about 33% loss through the drivetrain.

next mod - MANUAL + LSD

I don't think I'm going to chase anymore power through the auto 'box.

cheers,
.wook

IMO 250 flywheel kw is about right behind an auto, assuming your figure at the wheels is fairly accurate.

Good stuff wookiee, waiting to see what you can do at Wakefield with a manual box + LSD.

I think you'll find when you go from auto to manual, the difference will feel great, probably much the same as going from near-stock n/a to the blower :)

IMO 250 flywheel kw is about right behind an auto, assuming your figure at the wheels is fairly accurate.


sorry I'm going to have to totally disagree here 168kw atw in a fwd is no where near 250kw at the fly, lucky to see 225kw on an engine dyno and I'd put money on it

quick comparison here 2wd 168kw at the wheels claimed 250kw at the fly

well if that is the case then what did my AWD auto that made as much as 188kw at all 4's have at the engine (mind you that was after 6hrs on the dyno 35deg) 300+kw?

also the dyno operator mentioned just for reference that most GTR's he's run on that dyno loose approx 25-30kw when in 4wd mode vs 2wd mode

my 175kw atw when the tune was finalised would have been approx 230kw at the fly



but in saying all of that how many KW atw you have is just like comparing how long your schlong is... it dont really matter! with a manual he'd see another 20kw atw and mid 13's easy.... as it is now it might pull a high 13 if lucky or at least a low 14....


but to take your advise, you gotta do the manual/lsd conversion.... dude just silly running a 4spd auto around the track esp since you go out there a bit...

DO IT!!!!!!


Yeh indeed go for it, but 168atw is a fantastic figure for an auto, i was dissapointed at first because i thought you were driving a manual to begin with so i thought for a manual that wasnt much of a gain but with the 4 speed auto thats a figure to be proud of considering how much the auto brings the magna down in regards to perfomance!!!

Manual + LSD should see 200KWatw with ease good luck :thumbsup:

next mod - MANUAL + LSD

I don't think I'm going to chase anymore power through the auto 'box.

cheers,
.wook

Good on you for finally seeing the light.

Good work wookie. Can't wait till mine's finally tuned the way it should be!

well if that is the case then what did my AWD auto that made as much as 188kw at all 4's have at the engine (mind you that was after 6hrs on the dyno 35deg) 300+kw?


Well according to my calculations, 188kw at the wheels and 300kw at the flywheel gives you drivetrain loss of 38%.

Seeing as how Wookiee's auto is FWD, 5% less drivetrain loss of 33% seems quite reasonable to me. Actually I'd expect the drivetrain loss between awd and fwd to be few percent higher. But given the variance in chassis dynos, we aren't working with precise accurate numbers here are we?

At the end of the day chassis dyno numbers are always only a rough guide, but assuming Wookiee's 169fwkw is fairly accurate, 250kw at the flywheel seems reasonable to me.


sorry I'm going to have to totally disagree here 168kw atw in a fwd is no where near 250kw at the fly, lucky to see 225kw on an engine dyno and I'd put money on it


168fwkw from 225 flywheel kw gives 25% drivetrain loss. This would be about right for a manual FWD, but a bit optimistic for an auto IMO.

I don't really understand why you are disagreeing with me, the numbers you gave from your car's chassis and engine dyno results seem to support what I said?


Yeh indeed go for it, but 168atw is a fantastic figure for an auto, i was dissapointed at first because i thought you were driving a manual to begin with so i thought for a manual that wasnt much of a gain but with the 4 speed auto thats a figure to be proud of considering how much the auto brings the magna down in regards to perfomance!!!

Manual + LSD should see 200KWatw with ease good luck :thumbsup:

Mate going to manual isn't going to magically net him another 20% at the wheels, the difference in drivetrain loss between manual and auto aint that great. I'd put it at somewhere around 8-12%.

However peak power at the weels isn't the full story. All things being equal, the manual will go faster because it has shorter and tighter-stacked gearing, allowing better use of what power is available. Especially around a track.

169KW - sounds better
Nice figures wookiee !!!

I want power like that :cry:

great work wookie keep up the good work

i had my car dyno'd before and about a year after i had the manual conversion, sure it was different dyno's, but it went from 100kw atw to 127kw atw! given that they're not always entirely accurate, but still at least a 10-15kw would be accurate....

cant wait to see what yours would pull as a manual!

Stock my car made 170hp at the wheels and 163kw at the engine is 218hp which is a 22% loss approx. So I think and auto in a FWD car would be about 30%. AWD cars can loose up to 45-50% of the power to the wheels depending on how it is set up.

Thats wicked!! good to see the 4sp taking a hammering

Can't wait to see the Manual + LSD combo put in!

last thing I'm going to say on kw atw is that stock auto FWDs are lucky to pull 110kw atw. most are around 105kw. from 155kw that's a loss of 50kw through the drive train (i.e. a touch over 32%). taking that same figure (32% drive train loss) my power at the flywheel would be right at 250kw.

seeing as Sprintex rate their kit at 225kw bolted on to a stock engine, I would think that the mods I have done (exhaust and tune) could easily have netted my an extra 25kw, if not more.

when compared to andrewd's numbers (188kw and 175kw) my ~169kw isn't that good, and if you apply my calculations to those numbers (and add a little more for the AWD) you get big numbers at the flywheel (280+kw and 260+kw, respectively). so... either andrewd got a cracker of engine (which subsequently blew up!!), or the dyno he was getting these number from was not calibrated correctly.

either way, I'm not concerned. I'm comfortable saying I'm getting about 250kw at the flywheel. like andrewd said, it's like penis size, and who really cares anyway?

the best part about this tune (that I've noticed so far) is the fuel economy. so far I reckon it's going to save me about 1l/100km. that'll pay for itself in a couple of years. :D

cheers,
.wook

nah my dyno was calibrated the week before, and i only made 138kw pre tune :doubt:

but the best thing about the tune was the car ran the same all the time after it, before the tune on a warm day it was as slow as stock and cold night it has 100kw more.... and after the tune the car used less fuel than stock!!!!!

next mod - MANUAL + LSD


Praise the lord, for thou see'th the light.lol

Jokes aside, no one said the autos where crap, but if you're chasing power you can't beat the manuals any way you look at it....thats what everyone has been tryign to say.

Having said that, thats still a nice power figure and I'm sure it has a truck load of torque. :)

nah my dyno was calibrated the week before, and i only made 138kw pre tune :doubt:

but the best thing about the tune was the car ran the same all the time after it, before the tune on a warm day it was as slow as stock and cold night it has 100kw more.... and after the tune the car used less fuel than stock!!!!!

tbb, tazboy, andrewd have all destoryed pistons, it all began with a leaner mix didn't it?

My fuel economy during the rebuild was 0L per 100km:nuts:

who really knows what the loss through an auto is on any given day

If it feels faster it probably is.

I know everyone is buying SMT6's to tune but I found out that there is supposedly an application from perfect power that wipes ALL settings on the SMT6 and sets it to a factory default (ie. no password, no tune). CLRSMT.exe is what you are looking for.

Hope this helps a few people...

I know everyone is buying SMT6's to tune but I found out that there is supposedly an application from perfect power that wipes ALL settings on the SMT6 and sets it to a factory default (ie. no password, no tune). CLRSMT.exe is what you are looking for.

Hope this helps a few people...
Now you tell us!!! :rant:

:bowrofl:

I know everyone is buying SMT6's to tune but I found out that there is supposedly an application from perfect power that wipes ALL settings on the SMT6 and sets it to a factory default (ie. no password, no tune). CLRSMT.exe is what you are looking for.

Hope this helps a few people...
Now you tell us!!! :rant:

:bowrofl:
:stoopid:

WTF... $800 for a replacement SMT6 or a ****ing downloadable exe!!! :rant:

EDIT: I still have my original SMT6 --- I'm trying this on the weekend.

Heath, have you got this file? I went onto the Perfect Power website and downloaded all the associated files for the SMT6 with no luck.

PS : you have to sign up to the perfect power website to download. PM me if you want them without signing up ;)

good stuff wookiee!!!!! hope those pistons hold up to the task :bowrofl: nah she'll be right!!!

Sprintex kits FTW!

Heath, have you got this file? I went onto the Perfect Power website and downloaded all the associated files for the SMT6 with no luck.

PS : you have to sign up to the perfect power website to download. PM me if you want them without signing up ;)

No, this is a pretty powerful file from what I can gather - they will give it to you if you ask nicely (and have a reason for it) such as you bough the unit off someone and discovered it had been locked etc.

I have all of the documentation, there are a few people doing some pretty cool stuff with these, the sprintex setup is fairly basic compared to others! Ie. driving 6 extra injectors etc. Very clever - diode mixing/multiplexing factory injectors (pulse width extension on boost)

There are some very bright and enterprising individuals out there!