Test fit Enkei RPF1 in 18s :(

SPOHN · 12-18-2013, 01:14 PM

Quote:

Originally Posted by ResIpsa

Isn’t strange that almost every real world test that Grass Roots Motorsports does ends up contradicting the heavy wheel = slower idea? GRM volume 28, #4, June 2011 (19.6 lbs wheel is faster and makes more horsepower than a 15.9 lbs wheel.WTF!)

Just my 2 cents. Now Discuss...

Maybe a flywheel effect?

Maybe there's a such thing as to freed up. Like an exhaust system with note enough back pressure. Maybe resistence helps the cause.

synolimit · 12-18-2013, 02:10 PM

Quote:

Originally Posted by ResIpsa

Isn’t strange that almost every real world test that Grass Roots Motorsports does ends up contradicting the heavy wheel = slower idea? GRM volume 28, #4, June 2011 (19.6 lbs wheel is faster and makes more horsepower than a 15.9 lbs wheel.WTF!)

Just my 2 cents. Now Discuss...

Maybe a flywheel effect?

That doesn't make sense. Hence why we have drive train loss close to 18%. The more you add the more you lose. Track times I can see it for loss of inertia or something though.

ResIpsa · 12-19-2013, 08:19 AM

Quote:

Originally Posted by synolimit

That doesn't make sense. Hence why we have drive train loss close to 18%. The more you add the more you lose. Track times I can see it for loss of inertia or something though.

I know that it doesn’t make sense. I cited the issue of GRM if you want to check it out (assuming that you are like me and would never throw away a copy of GRM).

The explanation probably lies somewhere in the endless number of variables introduced in real world testing.

But don’t think about it too long or your head will start to hurt (and eventually explode).

jaedub · 12-16-2013, 10:52 PM

Is there RPF1 18x9.5 +15 and 18x10.5 +15 in gold?

synolimit · 12-17-2013, 01:05 PM

Quote:

Originally Posted by jaedub

Is there RPF1 18x9.5 +15 and 18x10.5 +15 in gold?

Google

SPOHN · 12-17-2013, 08:32 PM

I have RPF1 18x9.5 +15 and 18x10.5 +15. But I have AP six piston BBK on front. My setup was so close that it didn't scrape the wheel put to put a piece of pine straw when turning the wheel it got caught up. Now Megan (another forum member) had the same setup but cleared ok. Where it got caught up was on the lower corner of the caliper look to have a slight over mold/ casting effect. I didn't want to grind it any but could of. I just got some 2.5mm spacers from Z1. This way I wouldn't have to worry about small rocks on the track getting caught between the caliper and the wheel.

synolimit · 12-17-2013, 11:44 PM

Quote:

Originally Posted by SPOHN

I have RPF1 18x9.5 +15 and 18x10.5 +15. But I have AP six piston BBK on front. My setup was so close that it didn't scrape the wheel put to put a piece of pine straw when turning the wheel it got caught up. Now Megan (another forum member) had the same setup but cleared ok. Where it got caught up was on the lower corner of the caliper look to have a slight over mold/ casting effect. I didn't want to grind it any but could of. I just got some 2.5mm spacers from Z1. This way I wouldn't have to worry about small rocks on the track getting caught between the caliper and the wheel.

Pics of the front? I got a rock caught in between my caliper and wheel pretty recent. Nice deep scratch on the caliper and scratched a line of the plasti dip off the wheel. Its bound to happen.

Mike · 12-20-2013, 05:44 PM

Speaking of rim widths, I thought this picture would interest some people:

3 sets of Hoosier 295/40-18
Left stack is on 10" rims
Middle on 9.5"
Right unmounted.

The set on the 10" rims are about 2-3" taller overall than the ones mounted on narrower rims

12-17-2013, 08:32 PM	#6 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	I have RPF1 18x9.5 +15 and 18x10.5 +15. But I have AP six piston BBK on front. My setup was so close that it didn't scrape the wheel put to put a piece of pine straw when turning the wheel it got caught up. Now Megan (another forum member) had the same setup but cleared ok. Where it got caught up was on the lower corner of the caliper look to have a slight over mold/ casting effect. I didn't want to grind it any but could of. I just got some 2.5mm spacers from Z1. This way I wouldn't have to worry about small rocks on the track getting caught between the caliper and the wheel. __________________

12-20-2013, 05:44 PM	#8 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2187	Speaking of rim widths, I thought this picture would interest some people: 3 sets of Hoosier 295/40-18 Left stack is on 10" rims Middle on 9.5" Right unmounted. The set on the 10" rims are about 2-3" taller overall than the ones mounted on narrower rims PharmDZ and 2sl0w like this. __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

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12-16-2013, 10:52 PM	#4 (permalink)
jaedub Track Member Join Date: Aug 2010 Location: Los Angeles Posts: 906 Drives: 2010 Black 370Z MT Rep Power: 305	Is there RPF1 18x9.5 +15 and 18x10.5 +15 in gold?