What have you done to your car today?

[Guest]

 MercuryFree']

Cool sounds good, who made all that for you?

as I am thinking of going bigger injectors as i have v8 pink ones but not sure if they will support the power i want in the future above 250kwatw.

Fuel delivery requirement is generally held to be ~5.25cc/min per hp.

565*4=2260cc/min

2260/5.25 = 430hp

430*0.74 = 318kW @ flywheel

318*0.85 = 270kW @ wheels (approximate drivetrain loss of 15% pulled out of my @$$)

I believe the injector cc rating is at 100% duty cycle (not recommended...) so yeah if you want significantly more than 250kW atw then bigger would indeed be ideal

/math

Awsome info that is what i have been looking for. i thiknk read somewhere 15% loss for manual didnt specify 2 or 4wd though.

.

[quote name='funkytown said:

they wont support >250kw mate. thats more or less about their peak.

you can put 1000's in on your factory top feed rails afaik, and they easily support 300kw,

I run sidefed 800s to support 300

Cool so best way to go is to leave the factory rails for now and go bigger injectors as I am not going to want much more than 300kwatw anyway.

[funkytown]

about right rob, but id go with 20-25% for 4wd, 15% is reasonable for a 2wd.

which nets around 255wkw around 20% loss.

[Johnnynz]

Is it really a percentage? Seems crazy that if you are putting down say 1000HP you would lose 200HP. But if you put down 200HP you only lose 40HP.

How does drivetrain loss equate to a percentage? Is there a formula as to where it goes so to speak?

[ADIKT]

 Johnnynz said:

Is it really a percentage? Seems crazy that if you are putting down say 1000HP you would lose 200HP. But if you put down 200HP you only lose 40HP.

How does drivetrain loss equate to a percentage? Is there a formula as to where it goes so to speak?

hmmm never looked at it like that. shot johnny. await some answers

[MercuryFree]

 Johnnynz said:

Is it really a percentage? Seems crazy that if you are putting down say 1000HP you would lose 200HP. But if you put down 200HP you only lose 40HP.

How does drivetrain loss equate to a percentage? Is there a formula as to where it goes so to speak?

It's not in reality a percentage, but there are many many variables involved and given that most people in these parts have outputs in the 175-275kW band, an approximate number can be used. The real-world percentage would drop with an increase in power, although not necessarily if you end up overheating things

You'd need to get a whole heap of cars with every engine/hub/driveshaft/gearbox/diff combination running on engine, hub and rolling road dynos in order to develop a mathematical function to accurately model drivetrain loss. It's much easier to guesstimate

I'm not aware of anyone taking the time to do the above, but if anyone is then sing out because that'd be handy!

[Johnnynz]

Ah yup makes sense. I mainly wondered because I have a few mates with decent power Skylines (all 500HP+) and there drivetrain loss varies significantly. Especially between 2 and 4wd.

But as most Subi builds in NZ are between 200 and 270 KW atw I guess a percentage guesstimate does cover it pretty well.

[gotasuby]

 dilly said:

Got my engine in.. just need $$$$ for fabrication :

Should be good for up to 300kw atw. Yes it has brembos, 6 speed, link g4 and all suporting mods.

*edit* and air con + leather ;D

Come race me at mega meet legacys vs

[G-unit]

put front lip in the shop 2 be fixed and painted

[DRFVDR]

Looking at a new one

3 litre 6 cylinder AWD Non Subaru

[ADIKT]

 We are borg said:

Looking at a new one

3 litre 6 cylinder AWD Non Subaru

non subaru. loll

[LAtitudeNZ]

Hopefully figured out how to get my stock sub working after the previous owner unhooked it.

If only i was with it to test.

[madmike]

 We are borg said:

Looking at a new one

3 litre 6 cylinder AWD Non Subaru

:-(

[WRXER]

New alarm installed, thanks to the clubsub sponsors. Great job and customer services.

[DRFVDR]

need to be able to seat more than 5 sorry guys I gotta stop having kids

[subi4snow]

Put in new dobi sport springs in the back. I actually feel speed bumps when I hit them now, damn... At least it won't be dragging its ass when all loaded up for hunting/snowboarding

[subieboy]

Not car buuut:

Stripped the timber deck off, then waterblasted the f**k out of it to get rid of 22 years of sh*t from under the load deck, now to get some cancer chopped out of the back (on cage: only 50mm long bit of 20mm tube) and then coat the whole bastard in bitumen...

[Jakee]

Found this on it this morning.

[reaperblitz]

wtf? what does the sticker say and lol.. not dodgy bro. 'inter-me -resting'

[Jakee]

Says Line Road Vehicle Testing. Thats where I got the WOF lol

[G-unit]

went to un-alarm sti and wouldnt work, tryied the 2nd remote still no go, come home from town and works now, guna replace both remote batteries

[sultan]

 Johnnynz said:

Is it really a percentage? Seems crazy that if you are putting down say 1000HP you would lose 200HP. But if you put down 200HP you only lose 40HP.

How does drivetrain loss equate to a percentage? Is there a formula as to where it goes so to speak?

think of a 200hp motor sitting behind the drive train required to withstand 1000hp. it would probably barely move it. there would be a fixed amount of energy loss in the effort required to make everything turn, coupled with a variable energy loss as things heat up. the 1000hp motor would make the drivetrain run a lot hotter (and therefore lose more energy) than the 200hp motor would. the percentage guestimations would be assuming the energy loss behind a drive train sufficient for the power. a 1000hp motor in a mini with a mini gearbox probably wouldn't lose much power through the drive train at all. until it blew it to bits that is

i've been told 10% fwd. 15% rwd. 25% 4wd. 35% for big auto holdens?

[gazzy2000]

over this weekend I totally water blastered the carpets in my car (removed all interior) fitted GTB door cars and trim, prolly put pics in my BG ST thread

[BINKZ]

installed rear strut brace in the wagon

[TypeR rated]

washed it and took it for a drive today to say that I still care about it

[SWAGGN]

Polish it to the best ive ever seen it. Now its got to go into the mechsnics to get a new afm o2 sensor and get new rocker cover gaskets and new frint subframe bushes.