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Old 14 Feb 2019, 08:17 (Ref:3884030)   #1
Join Date: Jan 2014
Australia Hobart
Posts: 45
Trikes should be qualifying in the top 10 on the grid
Strut Flex???

I have a Honda Integra DC5 Type R. This a full house race car. It's won multiple Australian and State Championships as well it's won Time Attack and Super Sprint Events in it's Class and has been right up there Outright. So it's no Slouch! I'm running one season old Semi Yokohoma Slicks. Spring Rates are 16 fronts with 20's rear. Has one season old Yellow Speed Coil Overs. Has awesome Endless Brakes, Strut Braces and the car is Caged.

The problem I'm having is what I thought to be Torque Steer but it appears to be Strut Flex. It only does scary front end stuff at speed on road camber changes. If that happens on a bend it can get real interesting.

The car has spun twice in a straight line! With multiple other close shaves.

Been on the Wheel Alignment Machine many times. Set front end at 3 1/4 degrees Camber with 2 degrees Caster. Toe out is 2mm total. We have tried varying settings to no avail. 30mm Spacers against no Spacers makes no difference. Corner weights are set at 51.4% forward. Throttle - steady increase works - definitely no stomping at speed. Crest's and the middle to the edge of the road / track camber changes are the worst. But here's something of note - last season went to a hill climb 31 corners in 1.89 kilometres. Speeds never went over 100kmh /60mph. Track has lots of up and down and the car was awesome. Won there even though I broke the Shifter and was stuck in 3rd gear for all the runs. I could feel the suspension working, compressing unloading very evenly across the front. Only one corner with a Camber change in it and yes the car was a handful there.

I've tried two different sets of C/O's. The car came with Zeals / Hyperco Springs and now it has Yellow Speeds in the front with Zeal / Hyperco out back. This gives the best of the bad bunch of things tried.

Is there such a thing as a Strut Stiffener? Should I try softer Spring Rates? The Rates are the only thing that's stayed the same right through this. Have checked multiple times for worn components and chassis cracks.

For this season I've just added 80hp and have another 80 waiting to go in if I can sort this problem. The more power I put in the worse it gets.

Idea's? Suggestions?
Trikes is offline  
Old 14 Feb 2019, 16:46 (Ref:3884191)   #2
Join Date: Aug 2015
Posts: 14
sambeeb should be qualifying in the top 10 on the grid
can I ask what diff is in it? I have a torsen style Wavetrac in my FWDer and I've definitely found that switch backs, uneven surfaces and undulating surfaces can cause it to torque switch left to right across the front wheels and exacerbate the torque steer. On smooth tracks I have no such problems.

How much rear toe out are you running?

I saw in another post of yours that you had bump steer dramas and you either raised the rack or lowered the tie rods (or both) to get the arms level again. Are you seeing less toe change when they pull down on the cars front end when its up on the rig now.

Last edited by sambeeb; 14 Feb 2019 at 17:01.
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