Installed 20mm H&R wheel spacers - not happy with performance

Push370zzz · 05-04-2015, 05:51 PM

Quote:

Originally Posted by OTW Z-Boy

Umm yeah...

REO50
Size:
275/35R19 100Y Load Range:XL UTQG: 140 A A

Khumo:
Size:
275/35R19 (100Y) Load Range:XL UTQG: 280 AA A

Looking at this info you have effectively reduced your grip by 100%

That's where you're feeling the lack in performance

By this logic my snow tires should have incredible grip on the dry pavement.

OTW Z-Boy · 05-04-2015, 06:12 PM

Quote:

Originally Posted by Push370zzz

By this logic my snow tires should have incredible grip on the dry pavement.

Grip yeah rotational ease probably not so much... Tread pattern has to come into the debate somewhere

tnav · 05-06-2015, 03:19 AM

Quote:

Originally Posted by NismoNY

Hey,

Last night I installed my 20mm H&R DRM spacers (bolt-on) on my nismo rear wheels only, with plans to do the front later. It looks absolutely amazing and I do notice the car feels more planted - all positive things. The one thing that's killing my experience is the car's pick up. A lot of people say wheel spacers are such a small lightweight mod that they wouldn't noticeably slow a car down but it is added rotational weight and I swear it's not psychological. It might sound silly but I actually feel the car is a bit slower.

Does anyone else with 20mm spacers feel the same way?

I'm thinking of taking them off now and maybe going for something smaller like 10mm.

You're 100% right, car feels sluggish because of the extra weight, people said I was crazy for saying that. Go with extended studs, I got Z1 in mine.

My old bolt on spacers were 8.5 lbs all 4, the estimate is 20lbs for every 1lbs of unsprung weight, so at 170lbs it should feel similar to having a buddy of yours riding along.

Push370zzz · 05-06-2015, 10:14 AM

Quote:

Originally Posted by tnav

You're 100% right, car feels sluggish because of the extra weight, people said I was crazy for saying that. Go with extended studs, I got Z1 in mine.

My old bolt on spacers were 8.5 lbs all 4, the estimate is 20lbs for every 1lbs of unsprung weight, so at 170lbs it should feel similar to having a buddy of yours riding along.

That's because you are.

This is so incorrect it is funny. 20lbs for every 1 lb?! The effect of unsprung weight adding some virtual larger "effective weight" to the car would vary with the location. The further away from the point of rotation the greater the effect. Spacers are right at the hub, 8.5lbs for all 4 will not produce a noticeable difference in acceleration. It's absurd that you think you can notice that.

Haboob · 05-06-2015, 10:15 AM

I never had any issues with the H&R 20mm I put on (all around). Never felt any difference in performance/pick-up.

I no longer run them, because I wanted new wheels and ordered them with that offset.

skidad62 · 05-06-2015, 09:28 PM

Tires clearly the issue.

I added 20mm up front and 25mm rear - ZERO impact. ... Other than they bring the wheels to flush and look wicked good.

Not enough weight at the hub to be able to feel a difference.

Sent from my iPhone using Tapatalk

05-06-2015, 09:28 PM	#36 (permalink)
skidad62 Base Member Join Date: Aug 2013 Location: Moncton NB Canada Posts: 214 Drives: 2010 370Z Roadster Rep Power: 12	Installed 20mm H&R wheel spacers - not happy with performance Tires clearly the issue. I added 20mm up front and 25mm rear - ZERO impact. ... Other than they bring the wheels to flush and look wicked good. Not enough weight at the hub to be able to feel a difference. Sent from my iPhone using Tapatalk __________________ 2010 370Z Black Cherry Roadster Touring Sport 2003 Mustang Vortech YSI 640 rwhp - sold but not forgotten Last edited by skidad62; 05-06-2015 at 09:39 PM.

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05-06-2015, 10:15 AM	#35 (permalink)
Haboob A True Z Fanatic Join Date: Aug 2012 Location: Surface of the sun. Posts: 13,159 Drives: '18 GTI Autobahn DSG Rep Power: 1387	I never had any issues with the H&R 20mm I put on (all around). Never felt any difference in performance/pick-up. I no longer run them, because I wanted new wheels and ordered them with that offset.