Jump to content
SAU Community

Recommended Posts

It seems like the V is pretty tail happy... oversteers a lot.. ! I installed Stillen Sway bars over the Christmas period.. took out on a drive.. and it has improved a lot .. less slip.. Front - Soft, Rear - Medium...

However.. I'm still not happy or confident..

I always feel like the tail is going to slip driving in full auto going into fast corners (55km/h)..... Engaging the manual mode however brings back the traction.... but.. I shouldn't have to do that..

Setup Front 245/30 R20, Rear 275/30 R20 - ATR Achilles Sport tyres.. still has plenty of tread..

What do you guys think?

  • Replies 47
  • Created
  • Last Reply

Top Posters In This Topic

What year is your car? I'm guessing it's the open diff. Since you have an auto that's what you've got i do beleive, someone correct me if i'm wrong.

The 6mt car with the "sports kit" 18's and brembos have a VLSD which is better for tracking/cornering and also stops you from doing the 1 pegger burnouts. That's briefly what i know about diffs, definitely not a strong point so if any of that is incorrect someone chime in that knows exactly how diffs work.

Edited by Seano350GT

Ching chong spec tyres is what I think.

Either get some decent rubber under you (and yes it will cost a fortune because of your choice of wheels) OR

Go to front hard, and rear soft on the swaybars, to promote more understeer bias.

I have found mine a bit tail happy in the wet.. in the dry it is fine as long as you don't go silly with the loud pedal..

tightening up the rear suspension with sway bars will only make it worse if you don't also do the front by at least as much. I am guessing the stillen sway bars may be adjustable? If so, maybe try making the front 'medium' and the rear 'soft', and see how it goes.

Hmm.. you got me thinking Seano350GT .. its a 03 V35 with orange stitching on the steering wheel.. which according to research, must be the sports pack. Which also means I should have the VLSD.. ?

Sounds like the consensus boils down to Tyres.. I bought the car a year and a bit ago.. and it came with those 20" .. I must say it looks good .. but I'm after handling..

The Stillens are adjustable.. that was why I set to Front Soft and Rear Medium cut down oversteer .. but you guys are suggesting increasing understeer at the same time ..?

I find that the chassis handles pretty well, for the most part I have run 245 on the front and 285 on the back with 19" rims using Federal tyres which whilst not the most expensive seem to hold the road just as well as the Kumo KU19's I had on before. Kicking the tail out for me is predictable although I noticed its a lot easier to do with 245 compliance rubber on the back combined with the transgo shift kit

Back to suspension school Sonny :P

swaybars-

soft front, hard rear= oversteer bias

Hard front, soft rear = understeer bias.

Try it out - see if you prefer / feel more confident with a different bar setting. If your after handling, bye bye 20's. Back to 18s with some quality rubber, and sort out the handling with a proper suspension set up.

Hmm.. you got me thinking Seano350GT .. its a 03 V35 with orange stitching on the steering wheel.. which according to research, must be the sports pack. Which also means I should have the VLSD.. ?

Sounds like the consensus boils down to Tyres.. I bought the car a year and a bit ago.. and it came with those 20" .. I must say it looks good .. but I'm after handling..

The Stillens are adjustable.. that was why I set to Front Soft and Rear Medium cut down oversteer .. but you guys are suggesting increasing understeer at the same time ..?

It's a relative increase; it's not like the car will understeer more than it did before.

What Alex is referring to is changing the BALANCE to more of an understeer than oversteer bias.

Using a heavy rear ARB will increase low speed understeer markedly.

If you are chasing handling at all; you are wasting your time with 20's on this car.

You have no sidewall flex to absorb impact or surface change and the tyre just bashes around going all over the place.

Go back to a 19" and get some sidewall. Also, use a decent quality tyre; just because they're wide, doesn't automatically make them grippy.

It wouldn't be a bad thing to get some Super Pro compression rod bushes (Strut Rod bushes) with additional caster; this will drastically reduce the inherent understeer once you start pushing hard.

This will allow you to use your adjustable ARB's effectively. :thumbsup:

Back to suspension school Sonny :P

swaybars-

soft front, hard rear= oversteer bias

Hard front, soft rear = understeer bias.

Try it out - see if you prefer / feel more confident with a different bar setting. If your after handling, bye bye 20's. Back to 18s with some quality rubber, and sort out the handling with a proper suspension set up.

You speak the truth my good man. ;)

Thanks Guys... Looks like I'm a noob at this. :unsure: Only starting to learn about performance/handling .. Hypothetical situation ... Same Good Tyres all round.. which one better? 20" has more surface contact = more traction Vs more bounce/compression with 19" sidewall... ?

the internal diamiter of the rim has no impact on the contact area area if the correct profile tyre is on

But the smaller profile (ala 25 profile on a R20) will have a adverse affect as it is less compliant so the suspension has to do more work to keep contact... In no situation when your running a tinyt profile will a 20 have more traction than a 19.. Why do you think drag cars have huge profile tyres. But too high and there is adverse lateral handling effects due to sidewall flex. Its about a blalance, But for a V chassis in no way is a 20in tyre with 25 profile going to be better than the same in a 19 with more sidewall on a V chassis IMO

Idealy im guessing a 18in wheel with a 45 profile (or 40 is its like a 265 to keep a similar rolling diamiter as the profile is a percentage of the width) would be optimal for a V35

Edited by (Locky)

Thanks Locky. I forgot about the correctly profiled tyres doesn't change the contact area.

Can anyone shed some light on VLSD? I'm trying to figure out if my auto 2003 V has it. Other than the orange stitching on the steering wheel, I have no other way to tell visually.

I read with VLSD, both rears would spin? W/o VLSD .. only the right will?

Jack up rear of car under diff. Car in neutral, handbrake off (do it somewhere the car won't move obviously).

Turn a wheel (by hand), if the other rear spins the opposite way = open diff. Spins the same way when your friend puts some pressure slowing down the wheel, VLSD.

At this stage it doesn't matter too much. There are a lot of people out there with good handling cars that don't have VLSDs.

Thanks Guys... Looks like I'm a noob at this. :unsure: Only starting to learn about performance/handling .. Hypothetical situation ... Same Good Tyres all round.. which one better? 20" has more surface contact = more traction Vs more bounce/compression with 19" sidewall... ?

Only tyre pressure and weight on the wheel impact contact patch area.. tyre width, diameter or profile have no impact on contact patch size.

Thanks Guys.. only way to find out if my V has VLSD is to jack it up. Looks like I should get better tyres. I'm so used to 17"s with Goodyear F1 with my old Maxima/Subarus.. and the V's handling is shocking .. I initially thought the ATRs was decent .. not great or good.. but decent..

If I persist with 20"s.. what tyres suggestions? Falken Fk452s? Kumko Ku13 or others?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Update 3: Hi all It's been a while. Quite a lot of things happened in the meantime, among other things the car is (almost) back together and ready to be started again. Things that I fixed or changed: Full turbo removal, fitting back the OEM turbo oil hardlines. Had to do quite a bit of research and parts shopping to get every last piece that I need and make it work with the GT2860 turbos, but it does work and is not hard to do. Proves that the previous owner(s) just did not want to. While I was there I set the preload for the wastegates to 0,9bar to hopefully make it easier for the tuner to hit the 370hp I need for the legal inspections that will follow later on. Boost can always go up if necessary. Fitted a AN10 line from the catch can to the intake hose to make the catchcan and hopefully the cam covers a slight vacuum to have less restrictive oil returns from the head and not have mud build up as harshly in the lines and catch can. Removed the entire front interior just shy of the dashboard itself to clean up some of the absolutely horrendous wiring, (hopefully) fix the bumpy tacho and put in LED bulbs while I was there. Also put in bulbs where there was none before, like the airbag one. I also used that chance to remove the LED rpm gauge on the steering column, which was also wired in absolute horror show fashion. Moved the 4in1 Prosport gauge from sitting in front of the OEM oil pressure gauge to the center console vents, I used a 3D printed vent piece to hold that gauge there. The HKB steering wheel boss was likely on incorrectly as I sometimes noticed the indicator reset being uneven for left vs. right. In the meantime also installed an airbag delete resistor, as one should. Installed Cube Speed premium short shifter. Feels pretty nice, hope it'll work great too when I actually get to drive. Also put on a fancy Dragon Ball shift knob, cause why not. My buddy was kind enough to weld the rust hole in the back, it was basically rusted through in the lowermost corner of the passenger side trunk area where the wheel arch, trunk panel and rear quarter all meet. Obviously there is still a lot of crustiness in various areas but as long as it's not rusted out I'll just treat and isolate the corrosion and pretend it's not there. Also had to put down a new ground wire for the rear subframe as the original one was BARELY there. Probably a bit controversial depending on who you ask about this... but I ended up just covering the crack in the side of the engine block, the one above the oil feed, with JB Weld. I used a generous amount and roughed up the whole area with a Dremel before, so I hope this will hold the coolant where it should be for the foreseeable future. Did a cam cover gasket job as the half moons were a bit leaky, and there too one could see the people who worked on this car before me were absolute tools. The same half moons were probably used like 3 times without even cleaning the old RTV off. Dremeled out the inside of the flange where the turbine housing mates onto the exhaust manifolds so the diameter matches, as the OEM exhaust manifolds are even narrower than the turbine housings as we all know. Even if this doesn't do much, I had them out anyways, so can't harm. Ideally one would port-match both the turbo and the manifold to the gasket size but I really didn't feel up to disassembling the turbine housings. Wrapped turbo outlet dumps in heat wrap band. Will do the frontpipe again as well as now the oil leak which promted me to tear apart half the engine in the first place is hopefully fixed. Fitted an ATI super damper to get rid of the worn old harmonic balancer. Surely one of the easiest and most worth to do mods. But torquing that ARP bolt to spec was a bitch without being able to lock the flywheel. Did some minor adjustments in the ECU tables to change some things I didn't like, like the launch control that was ALWAYS active. Treated rusty spots and surface corrosion on places I could get to and on many spots under the car, not pretty or ideal but good enough for now. Removed the N1 rear spats and the carbon surrounding for the tailpipe to put them back on with new adhesive as the old one was lifting in many spots, not pretty. Took out the passenger rear lamp housing... what do you know. Amateur work screwed me again here as they were glued in hard and removing it took a lot of force, so I broke one of the housing bolts off. And when removing the adhesive from the chassis the paint came right off too. Thankfully all the damaged area won't be visible later, but whoever did the very limited bodywork on this car needs to have their limbs chopped off piece by piece.   Quite a list if I do say so myself, but a lot of time was spent just discovering new shit that is wrong with the car and finding a solution or parts to fix it. My last problem that I now have the headache of dealing with is that the exhaust studs on the turbo outlets are M10x1.25 threaded, but the previous owner already put on regular M10 nuts so the threads are... weird. I only found this out the hard way. So now I will just try if I can in any way fit the front pipe regardless, if not I'll have to redo the studs with the turbos installed. Lesson learned for the future: Redo ALL studs you put your hands on, especially if they are old and the previous owners were inept maniacs. Thanks for reading if you did, will update when the engine runs again. Hope nothing breaks or leaks and I can do a test drive.
    • No those pads are DBA too  but they have colors too. I look at the and imo the green "street" are the best.
    • I’m not sure what happened I told them about sonic tunes free OTS tune and the next the I know .. I was booted..   To funny 
    • Yea - I mean I've seen my fuel pump which is decades old and uh, while I'm not saying this with real knowledge... but I sure get the ick at using anything in the fuel system that produced the state of that pump. Many years ago I went through multiple pumps (and strainers) before I dropped the tank to clean it out with extreme violence. I'm talking the car would do maybe 50km before coming to a halt, which resulted in me cleaning out the filter with some brake cleaner and going on my way. None of my stuff ever looked like what came out of your fuel tank. I don't think I'd be happy with it unless every single component was replaced (or at least checked/cleaned/confirmed to be clean here).
    • I'm not going to recommend an EBC pad. I don't like them. Just about anything else would suit me better. I've been using Intima pads for a while now.
×
×
  • Create New...