how would adding 15-25f and 25r spacers affect the track handling? running comptech pro suspension, comptech sways, nsx r chassis bars and rear beam and toelinks. use oe 15/16 for track with r compound tires.
effect of spacers at track
- Thread starter akydakyx
- Start date
If I recall correctly wider track=more resistance to sideways weight transfer and body lean.
you do have more grip. heavier steering wheel as well.
i had used 25mm front n back spacers on 15/16.
IMO, getting a set of 17/18 with wider tires makes a better choice than the 15/16.
i had used 25mm front n back spacers on 15/16.
IMO, getting a set of 17/18 with wider tires makes a better choice than the 15/16.
+1
Wider track = more grip.
Be sure to have the 25mm spacers with their own studs in them, or run extra long motorsports (or ARP) wheel studs.
25mm on the stock 15/16" wheels (while not knowing the offset off the top of my head) should give you the track width of most aftermarket 17" wheels that people put on the car. I'd say it would be a GOOD thing compared to keeping the really narrow track width of the stock 15/16" setup.
Go for it.
Billy
It dosn't affect the geometry much, if anything spacers affect the scrub radius.
25mm on the stock (VERY narrow) 15/16 setup probably puts it close to a 17x8 +40 (guesstimation).
Heck, the FXMD NSX ran 25mm spacers on 40 offset wheels with its widebody. That's a ~ 25 total offset front and ~10 total offset rear. Seemed to work alright
That setup also is working well on Jim Cozzolino's widebody turbo NSX which he thought handled very well when he tracked it a month or two ago.
It dosn't affect the geometry much, if anything spacers affect the scrub radius.
25mm on the stock (VERY narrow) 15/16 setup probably puts it close to a 17x8 +40 (guesstimation).
Heck, the FXMD NSX ran 25mm spacers on 40 offset wheels with its widebody. That's a ~ 25 total offset front and ~10 total offset rear. Seemed to work alright
That setup also is working well on Jim Cozzolino's widebody turbo NSX which he thought handled very well when he tracked it a month or two ago.
in fact, the stock 15 with 205 RA1 and H&R 25 spacers did rip my fender lip a little, so check your camber, or if possible, roll/ trim the fender lip a little.
Good to know, I don't know the stock offset of the 15" front wheel, not am sure the track width of the stock wheel with the 25mm spacer. -Havn't had the stock wheels on in years, but they are narrow.
But I agree, double check and make sure your camber works for the fender/fender liner.
What do you guys think of the narrow spacers with integrated studs, such as the Project Kics 15mm spacers? People use these on the street but I'm wondering how people feel about using them in a track application.
thanks for the replies. to make a long story short i have to stick with 15/16 for now. so it might be worth a try. what are the widest spacers you would recommend with stock 16/17 wheels that are on car when track tires are not? fyi : The NSX's front offset is 55mm and the rear is 60mm irrespective of 15/16 or 16/17 wheel sizes. does that info change anyone's thinking?
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Actually I had it out on the track again 2 weeks ago at Firebird West and it handled like a go-kart.
It dosn't affect the geometry much, if anything spacers affect the scrub radius.
25mm on the stock (VERY narrow) 15/16 setup probably puts it close to a 17x8 +40 (guesstimation).
Heck, the FXMD NSX ran 25mm spacers on 40 offset wheels with its widebody. That's a ~ 25 total offset front and ~10 total offset rear. Seemed to work alright
That setup also is working well on Jim Cozzolino's widebody turbo NSX which he thought handled very well when he tracked it a month or two ago.
I've used them for over 5 years without any problems. They were H&R brand so we know the quality is there. I used 15mm in the front and 25mm on the rears. They not only look great but they do help in the handling area. I made sure of a few things first. I switched to ARP (Comptech's old stud kit) extended wheel studs for the front. With my track rims, I have open wheel nuts so that the stud actually protrude beyond the nut. I was also able to use stock OEM lugs from the older Acura Legend which are closed and chromed. They are long enough not to bottom out on the studs. Also extremely good quality on their chrome plating. For the rear, I used the built in studs on the spacer that H&R has. They work fine. I didn't have to change from my stock OEM studs on the rear hub. They are also holding up fine as long as you use the lug nuts that H&R provide with the kit. Do not use their longer wheel studs which come with the kit. They are too small on the knurled area for the holes in the stock hub. Although I'm still running the stock 16" front and 17" rears which may not be as competitive as some other setups, this combination with the H&R spacers works extremely well and I have had not fitment issues on tires even larger than OEM specs.
Al
Al
Al,
I am confused, the 25mm H&R spacers with the integrated studs are ok to use or not (in your opinion)? Which longer wheel studs that come with the kit are you talking about... the 25mm rear kit? Aren't they already integrated?
Just use the 25mm spacers as they are made with the built in studs. You will be bolting them onto your stock wheel studs with the wheel nuts they provide you. It's a good setup especially for stock 17" rear wheels.
Al
Al
For the track, I prefer spacers with longer studs.
Why? Because I can check that all the studs are torqued during lunch break without having to take off 4 wheels and reinstall them - thus checking 40 nuts. The one time I ran with integral studs I found two that had come loose - still on but not torqued down to 80#.
Why? Because I can check that all the studs are torqued during lunch break without having to take off 4 wheels and reinstall them - thus checking 40 nuts. The one time I ran with integral studs I found two that had come loose - still on but not torqued down to 80#.
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Well Daaaaaady. I don't use the 25mm in the front. I use the 15mm and I have upgraded the stock studs with the longer ARP studs as I've stated in panel #14. For the rear I opted for the 25mm spacer and then torqued the nuts to 80 foot lbs on the stock studs. I've recheck the stock lug nuts every time I switch my tires from street to track so it's not a big deal to do. I've never found the lug nuts on the spacer to have ever lose their final setting in the last 5+ years. I do check every so often but it's never shown up as a problem.
I do agree with you if you are using your car primarily as a track car to go with installing longer wheel studs on all four hubs. Then use the appropriate hub centric spacer for each corner.
Al
I do agree with you if you are using your car primarily as a track car to go with installing longer wheel studs on all four hubs. Then use the appropriate hub centric spacer for each corner.
Al
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I wouldn't think twice about using integrals on the street. On the track, I just feel more comfortable with the longer studs. I know that I checked them and I don't have to be going down the straight with the thought in the back of my mind "wonder if they were tight because I was too lazy to jack up the car, pull the wheels and check them."
Just my $0.02, not saying that they are unsafe for the average weekend warrior. I ran 16 events last year and just felt better going with the longer studs as I have enough things to worry about - like Curt blowing oil in front of me on the track. :tongue:
Just my $0.02, not saying that they are unsafe for the average weekend warrior. I ran 16 events last year and just felt better going with the longer studs as I have enough things to worry about - like Curt blowing oil in front of me on the track. :tongue:
+1....
I run 5mm spacers upfront and 25mm spacers on the rear, all with long studs.
I run 5mm spacers upfront and 25mm spacers on the rear, all with long studs.
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