clutch HP, i mean torque rating** question...

New members MUST post a new intro thread before they can access the rest of the forum.

clutch HP, i mean torque rating** question...

Postby theUNYTEDone » Wed Dec 06, 2006 8:37 pm

alright, so we all know that stage this and that are rated for X amount of horsepower...as the clutch comes before the rest of the drivetrain, i figured that the clutch HP rating would be flywheel/crank horsepower...is this correct?

which leads me to these questions (please forgive me for being newbish here...)

since my goal is roughly >400awhp, a modest 25% drivetrain loss would give me roughly 600 crank horsepower. do i then need a clutch rated for 600hp?

thanks much!
Members don't see the above ad. Register now - it's free!
Last edited by theUNYTEDone on Thu Dec 07, 2006 3:30 am, edited 1 time in total.
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby ___Scott___ » Wed Dec 06, 2006 9:57 pm

Clutches hold torque, not horsepower.
Scott
Colorado Springs, CO - USA
SONY
Opera - The better browser
User avatar
___Scott___
Established Member
 
Posts: 2057
Joined: Mon Aug 09, 2004 5:30 pm
Location: - - USA - - Colorado Springs, CO

Re: clutch HP rating question...

Postby sleeper » Wed Dec 06, 2006 11:40 pm

theUNYTEDone wrote:alright, so we all know that stage this and that are rated for X amount of horsepower...as the clutch comes before the rest of the drivetrain, i figured that the clutch HP rating would be flywheel/crank horsepower...is this correct?

which leads me to these questions (please forgive me for being newbish here...)

since my goal is roughly >400awhp, a modest 25% drivetrain loss would give me roughly 600 crank horsepower. do i then need a clutch rated for 600hp?

thanks much!


how do you get 400AWHP to be 600FWHP?
sleeper
Club Member
 
Posts: 888
Joined: Mon Aug 23, 2004 7:56 am
Location: Norway

Re: clutch HP rating question...

Postby db » Thu Dec 07, 2006 12:18 am

theUNYTEDone wrote:alright, so we all know that stage this and that are rated for X amount of horsepower...as the clutch comes before the rest of the drivetrain, i figured that the clutch HP rating would be flywheel/crank horsepower...is this correct?


Clutches are rated at flywheel torque.

since my goal is roughly >400awhp, a modest 25% drivetrain loss would give me roughly 600 crank horsepower. do i then need a clutch rated for 600hp?


With a 25% loss, 600 flywheel would make 450 wheel horsepower.
Dave
Black 1990 Celica Alltrac
2011 Ford Fusion SE (Daily driver)
2008 Harley-Davidson Street Bob
Las Vegas, NV
http://www.facebook.com/ethinos
Image
db
Established Member
 
Posts: 2177
Joined: Mon Aug 16, 2004 9:20 pm
Location: Las Vegas, NV

Re: clutch HP rating question...

Postby CeliKhanh » Thu Dec 07, 2006 1:03 am

theUNYTEDone wrote:since my goal is roughly >400awhp, a modest 25% drivetrain loss would give me roughly 600 crank horsepower. do i then need a clutch rated for 600hp?

thanks much!


500 not 600
CeliKhanh
Club Member
 
Posts: 66
Joined: Thu Nov 02, 2006 3:35 am

Postby theUNYTEDone » Thu Dec 07, 2006 3:12 am

gah, torque then. sorry...hah, i knew it didn't really sound right when i re-read it. :lol:

Sleeper: i didnt necessarily state that 400awhp=600chp...there has been much debate as to exactly how much drivetrain loss there is with our cars...i've gotten anywhere between 25-30%...therefore, keeping it at 25% is a fairly easy number to work with when doing calculations. (600x.75=450)...my 400 in the first post had a > symbol in front of it.

and SINCE this isn't about HP anymore (sorry about that again, guys)

would anyone happen to have a ballpark torque number with 450awhp? im thinking peak torque to be around 350...? is that reasonable? and if so...should i get a clutch rated at around 500tq? (i'm counting drivetrain loss at 25% in this one, too...

thanks for your patience!
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Re: clutch HP rating question...

Postby Gary ST165 » Thu Dec 07, 2006 3:25 am

NiGeL wrote: do i need a clutch rated for 600hp?

thanks much!






no need >>>> unless you are $:twisted:$


450 bhp & 450lbs ft @ flywheel might be a more realistic upper target unless you have lots resources to strengthen and build a (reliable? :cry:) 600 bhp 3sgte.

good luck NiGeL :smokes:
Last edited by Gary ST165 on Thu Dec 07, 2006 3:31 am, edited 1 time in total.
ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

Image
User avatar
Gary ST165
Established Member
 
Posts: 1524
Images: 0
Joined: Sun Jan 01, 2006 10:11 pm
Location: United Kingdom

Postby theUNYTEDone » Thu Dec 07, 2006 3:29 am

well that was just the thing...the 600 number was going to be at the FW, not the wheels...

i'm PMing with illgt4, and he's got a spec stage 3 he wants to sell...go or no go?

im pretty much an idiot when it comes to clutches. :(
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby Gary ST165 » Thu Dec 07, 2006 3:38 am

curious, where did the 600 fw figure come from?

are you aiming to achieve similar results to the Fensport developed cars?
the credit card will need to take a hammering :shock:

i'd hate to think how much $$$$ 600 bhp @ fw costs.... :roll:
ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

Image
User avatar
Gary ST165
Established Member
 
Posts: 1524
Images: 0
Joined: Sun Jan 01, 2006 10:11 pm
Location: United Kingdom

Postby theUNYTEDone » Thu Dec 07, 2006 3:45 am

since my goal is 450bhp, the crank should be producing about 600. im oblivious as to what the tq reading will be, which is why ive posted this thread...

gah. it seems so confusing now!
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby Conan » Thu Dec 07, 2006 4:51 am

Even if you do build a car with 400 HP to the wheels, which I said would be a laggy biotch, I don't recommend going into lottery with economy clutches. I'd be thinking multi-plate OS Giken or a very reliable single plate. Again, 500+ HP from a 2.0 liter motor is on the overkill side of things for me :roll:
When in doubt - increase boost.
User avatar
Conan
Established Member
 
Posts: 2010
Joined: Sat Feb 19, 2005 10:38 am
Location: Lithuania

Postby theUNYTEDone » Thu Dec 07, 2006 8:03 am

Conan wrote:Even if you do build a car with 400 HP to the wheels, which I said would be a laggy biotch, I don't recommend going into lottery with economy clutches. I'd be thinking multi-plate OS Giken or a very reliable single plate. Again, 500+ HP from a 2.0 liter motor is on the overkill side of things for me :roll:


well...to each their own. im sure 1000hp supra owners have the same problems. its just a matter of where you want the power. (yeah yeah, i don't have a supra)

however, i feel that ~400 at the wheels is very reasonable. if anything, i'll have a lower tuned boost setting, then if i need to play, i'll turn it up.

thanks for your tip about the Giken...never heard of that company, actually. 8) i guess that would help that laggy biotchness a tad...

oh, and im thinking of going up to a 2.2, but this decision is dependant on much more research.
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby Conan » Thu Dec 07, 2006 8:11 am

theUNYTEDone wrote:thanks for your tip about the Giken...never heard of that company, actually

Oops, I'm not sure OS Giken makes a clutch for ST185. I was thinking about Ogura when I said it. Rene (Meurz) has it in his car...
When in doubt - increase boost.
User avatar
Conan
Established Member
 
Posts: 2010
Joined: Sat Feb 19, 2005 10:38 am
Location: Lithuania

Postby theUNYTEDone » Thu Dec 07, 2006 8:15 am

ahhh, Ogura. they have awesome products. i believe they made the first hydraulic clutch for the yamaha Raptor atv...

anyway, i'll check into it! :smokes:
Nigel in Hawaii
From Hell and Back
User avatar
theUNYTEDone
GTFour God
 
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby gt4tified » Thu Dec 07, 2006 2:57 pm

theUNYTEDone wrote:well that was just the thing...the 600 number was going to be at the FW, not the wheels...

i'm PMing with illgt4, and he's got a spec stage 3 he wants to sell...go or no go?

im pretty much an idiot when it comes to clutches. :(


Yes OS Giken does make a one for the 3sgte....the Ogura or Blitz are also the shiznit!

I was supposed to take that spec clutch from him but I got a killer deal on an ACT stage3 from Sifu...but for the most part, spec clutches are supposed to be great on our cars....the mr2 guys seem to like them also.

I'd say at the price you're getting it at.....run with it!
ST185 JDM GT-FOUR RC- "White Trash"
[url=http://imageshack.us][img]http://img231.imageshack.us/img231/8264/dynographsmallstretchedmu9.jpg[/img][/url]
gt4tified
GTFour God
 
Posts: 3151
Images: 5
Joined: Wed Mar 30, 2005 3:22 pm
Location: Trinidad, W.I.


Return to New Member Forum

Who is online

Users browsing this forum: No registered users and 1 guest

cron