DDM Project 370Z

M.Bonanni · 07-08-2009, 11:43 AM

Just ordered an Unorthodox Racing stock diameter crank pulley! According to them, this will shed 7 lbs. of rotating mass off of the front of the car resulting in quicker revs, better throttle response, and more freed up horsepower. They are also claiming gains of 10-14 horsepower, but I am assuming that is at the crank, not at the wheels. We'll find out soon enough!

PM me for pricing and availability!

semtex · 07-08-2009, 01:07 PM

Quote:

Originally Posted by DDMotorsports

Just ordered an Unorthodox Racing stock diameter crank pulley! According to them, this will shed 7 lbs. of rotating mass off of the front of the car resulting in quicker revs, better throttle response, and more freed up horsepower. They are also claiming gains of 10-14 horsepower, but I am assuming that is at the crank, not at the wheels. We'll find out soon enough!

PM me for pricing and availability!

10-14 hp from a stock diameter pulley???

Even at the crank I'd be surprised if it made that much. I dyno'd the Stillen UD pulley at +5whp on a DynoJet. But like you said, we'll find out soon enough.

M.Bonanni · 07-08-2009, 01:59 PM

Quote:

Originally Posted by semtex

10-14 hp from a stock diameter pulley???

Even at the crank I'd be surprised if it made that much. I dyno'd the Stillen UD pulley at +5whp on a DynoJet. But like you said, we'll find out soon enough.

Yeah not too confident in their numbers either, but we'll see. I would expect gains to be in line with the Stillen pulley.

wstar · 07-08-2009, 02:19 PM

Quote:

Originally Posted by DDMotorsports

Yeah not too confident in their numbers either, but we'll see. I would expect gains to be in line with the Stillen pulley.

Except the Stillen one semtex dyno'd was underdriven, the unorthodox one isn't. Should be even less.

M.Bonanni · 07-08-2009, 02:20 PM

Quote:

Originally Posted by wstar

Except the Stillen one semtex dyno'd was underdriven, the unorthodox one isn't. Should be even less.

Not necessarily. It will depend on the weight of the Stillen vs. the weight of the Unorthodox.

semtex · 07-08-2009, 02:23 PM

But doesn't pulley diameter come into play as well? Smaller diameter = less power diverted to the auxiliary systems, right? I think that's what wstar is getting at.

M.Bonanni · 07-08-2009, 02:31 PM

Quote:

Originally Posted by semtex

But doesn't pulley diameter come into play as well? Smaller diameter = less power diverted to the auxiliary systems, right? I think that's what wstar is getting at.

Yeah it does also have effect but if its also heavier than the UR one then it will be a wash. Even if they weigh the same, I would guess that it will make 1whp difference max, or less. You will gain more from less weight than less parasitic drag. Like I said, we'll see once I put the UR pulley on my car. I personally prefer to use a stock diameter pulley to maintain factory accessory outputs from the alternator, power steering, etc.

wstar · 07-08-2009, 03:08 PM

Quote:

Originally Posted by DDMotorsports

Just ordered an Unorthodox Racing stock diameter crank pulley! According to them, this will shed 7 lbs. of rotating mass off of the front of the car

Quote:

Originally Posted by DDMotorsports

Yeah it does also have effect but if its also heavier than the UR one then it will be a wash. Even if they weigh the same, I would guess that it will make 1whp difference max, or less. You will gain more from less weight than less parasitic drag. Like I said, we'll see once I put the UR pulley on my car. I personally prefer to use a stock diameter pulley to maintain factory accessory outputs from the alternator, power steering, etc.

Stillen quotes the stock pulley at 4.72 lbs. My bathroom scale, while not very accurate or repeatable unfortunately, agrees that my stock pulley is somewhere in the vicinty of 4.5-5-ish lbs. So there's no way it's shaving off 7lbs

It will be interesting to get the Unorthodox one weighed though so we can compare. Stillen's showing 1.32 lbs for their standard-sized one and 0.99 lbs for their underdriven model, but I don't know if anyone's tried to accurately verify those numbers.

M.Bonanni · 07-08-2009, 03:10 PM

Quote:

Originally Posted by wstar

Stillen quotes the stock pulley at 4.72 lbs. My bathroom scale, while not very accurate or repeatable unfortunately, agrees that my stock pulley is somewhere in the vicinty of 4.5-5-ish lbs. So there's no way it's shaving off 7lbs

It will be interesting to get the Unorthodox one weighed though so we can compare. Stillen's showing 1.32 lbs for their standard-sized one and 0.99 lbs for their underdriven model, but I don't know if anyone's tried to accurately verify those numbers.

Well then that makes me further doubt their hp claims lol. Their weight calculations were on a G37, but I am assuming that they would be the same pulley as the 370Z.

wstar · 07-08-2009, 03:13 PM

Actually I just remembered that I have a more accurate small scale in the kitchen that I use for cooking ingredients. My stock pulley came out to 4.75 lbs there, with an accuracy of roughly +/- 0.05, so pretty much right in line with Stillen's reported number for it.

Brazilbro · 07-08-2009, 03:41 PM

For cooking ingredients huhm..

semtex · 07-08-2009, 03:45 PM

Quote:

Originally Posted by Brazilbro

For cooking ingredients huhm..

LOL.

wstar · 07-08-2009, 04:05 PM

Quote:

Originally Posted by Brazilbro

For cooking ingredients huhm..

I didn't say what I was cooking with those ingredients now did I?

Caravanshaka · 07-08-2009, 04:07 PM

Quote:

Originally Posted by Brazilbro

For cooking ingredients huhm..

who weighs cooking ingredients??

ohhhh, THOSE cooking ingredients

M.Bonanni · 07-08-2009, 03:46 PM

Lmao

07-08-2009, 11:43 AM	#1 (permalink)
M.Bonanni The370Z.com Sponsor Join Date: Nov 2008 Location: Las Vegas Posts: 2,575 Drives: Fast Rep Power: 1322	Just ordered an Unorthodox Racing stock diameter crank pulley! According to them, this will shed 7 lbs. of rotating mass off of the front of the car resulting in quicker revs, better throttle response, and more freed up horsepower. They are also claiming gains of 10-14 horsepower, but I am assuming that is at the crank, not at the wheels. We'll find out soon enough! PM me for pricing and availability! __________________ MikeBonanni.com Twitter: http://www.twitter.com/MikeBonanni Facebook: http://www.facebook.com/MBonanni36 Function > Form

07-08-2009, 02:23 PM	#6 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	But doesn't pulley diameter come into play as well? Smaller diameter = less power diverted to the auxiliary systems, right? I think that's what wstar is getting at. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

07-08-2009, 03:13 PM	#10 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	Actually I just remembered that I have a more accurate small scale in the kitchen that I use for cooking ingredients. My stock pulley came out to 4.75 lbs there, with an accuracy of roughly +/- 0.05, so pretty much right in line with Stillen's reported number for it. __________________ 7AT Track Car! Journal thread / Car setup details

07-08-2009, 03:46 PM	#15 (permalink)
M.Bonanni The370Z.com Sponsor Join Date: Nov 2008 Location: Las Vegas Posts: 2,575 Drives: Fast Rep Power: 1322	Lmao __________________ MikeBonanni.com Twitter: http://www.twitter.com/MikeBonanni Facebook: http://www.facebook.com/MBonanni36 Function > Form

07-08-2009, 03:41 PM	#11 (permalink)
Brazilbro A True Z Fanatic Join Date: Mar 2009 Location: Indianapolis, IN Posts: 1,131 Drives: Juke/240Z Rep Power: 850	For cooking ingredients huhm..