GSF/RCF LCA bushings in ISF
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lobuxracer (09-08-18)
09-08-18, 12:57 AM
#18
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09-11-18, 07:52 AM
#19
09-11-18, 03:55 PM
#20
Those of you repoeting zero increases in NVH with poly bushings - i'm not buying it. You are also comparing new poly bushings against your old worn/cracked bushings, which is not a good conparison to begin with.
09-11-18, 08:09 PM
#21
Tech Info Resource
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No, not "old, worn, cracked" at all. Used yes, but definitely nothing wrong with them when they were removed.
But you don't have to buy anything. I am sure your experience tells you we are all imagining this.
I would suggest you put a camera on the bushing the way Mike at Figs did and see how much the new bushing deflects under braking. It was pretty enlightening and pretty damning for toe control on the IS F.
But you don't have to buy anything. I am sure your experience tells you we are all imagining this.
I would suggest you put a camera on the bushing the way Mike at Figs did and see how much the new bushing deflects under braking. It was pretty enlightening and pretty damning for toe control on the IS F.
09-11-18, 09:38 PM
#22
As far as my old bushings were concerned. I sold them to an IS350 owner who was happy to get them.
Lou
09-12-18, 03:59 AM
#23
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I would make a lower durometer version of our USRS bushings, if I felt that the NVH was the slightest issue. I find it odd that someone driving an ISF or RCF would be bothered by having a much more stable car and more communicative steering. I guess Lexus engineers know who they are catering to when they engineer the life out of their otherwise great cars.
But seriously, to say that NVH is an issue with our bushings, you’d have to have a butt with the sensitivity of a seismograph!
As far as LCA bushings go, don’t forget, the USRS is the only bushing that eliminates AXIAL movement of the LCA, due to our thrust loaded design.
Rafi
09-12-18, 10:30 PM
#24
I would make a lower durometer version of our USRS bushings, if I felt that the NVH was the slightest issue. I find it odd that someone driving an ISF or RCF would be bothered by having a much more stable car and more communicative steering. I guess Lexus engineers know who they are catering to when they engineer the life out of their otherwise great cars.
But seriously, to say that NVH is an issue with our bushings, you’d have to have a butt with the sensitivity of a seismograph!
As far as LCA bushings go, don’t forget, the USRS is the only bushing that eliminates AXIAL movement of the LCA, due to our thrust loaded design.
Rafi
Last edited by threefiveo; 09-12-18 at 10:35 PM.
09-13-18, 06:18 AM
#25
NVH is not an issue, however it's an issue for some people depends on the road condition in their area. I had the USRS and it improved the steering, braking and confidence in cornering, but the local street condition around me is horrible with dips, road potholes and snow in winter therefore I switched back to oem bushings. I guess Lexus designed the rubber bushing for all road/weather condition.
Last edited by zen; 09-14-18 at 06:50 AM.
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BlackISFNY (11-23-18)
09-14-18, 08:34 AM
#27
Well, If something were to go awry with the front suspension for instance, I don't want Lexus to see aftermarket bushings and point to them as the cause or really anything to that regard. Basically its not worth the hassle to me. The small upgrade to the harder OEM parts, that are indistinguishable from the factory ISF parts is the way to go for me. (for now).
09-16-18, 01:40 PM
#28
Before you make unsubstantiated remarks with absolutely no evidence to back it up, I'd suggest a search of the forums for folks using either the Figgs or the RRRacing Bushings. There are other threads concerning this subject. You might learn something. As far as my RRRacing "A" Arm USRS bushings, I have reported a slight increase in NVH. Certainly not much, but the decrease in nose dive and the increasing in handling and control more than made up for the slight NVH increase. They have been installed for 3 years now.
As far as my old bushings were concerned. I sold them to an IS350 owner who was happy to get them.
Lou
As far as my old bushings were concerned. I sold them to an IS350 owner who was happy to get them.
Lou
You'll note that i didnt say there is nothing to be gained in handling, suspension motion control, tire wear or anything else. I was strictly referring to increased NVH, which whether you agree or disagree, is a fact, given the durometer rubber used by lexus vs. the poly aftermarket offerings.
Last edited by DaveGS4; 09-16-18 at 08:41 PM. Reason: Rude Personal comments edit
09-16-18, 07:29 PM
#29
^^^^I read exactly what you said - BOTH Statements! Both were wrong
Maybe your bushings were cracked when you replaced them with OEM bushings, mine were not. So, I could tell the positive difference immediately. And, as I said, I sold my old bushings to an IS350 owner. To me, the slight increase in NVH, was really not worth mentioning, but I mentioned it for truth only. The Poly Bushings are one of the best mods I have done
Lou
Maybe your bushings were cracked when you replaced them with OEM bushings, mine were not. So, I could tell the positive difference immediately. And, as I said, I sold my old bushings to an IS350 owner. To me, the slight increase in NVH, was really not worth mentioning, but I mentioned it for truth only. The Poly Bushings are one of the best mods I have done
Lou
09-16-18, 08:45 PM
#30
Forum Administrator
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Folks keep the rude personal commentary out of this thread (edited) or do not post.