'87 MR2 Understeer

Re: '87 MR2 Understeer (MCT_MR2)

Sun, 13 Oct 2013 11:58:52 GMT

I found the easiest way to battle understeer was to have the front ride height lower, raking the car to get more weight over the front end. I have standard swaybars, and used to have tokico illumina shocks and cusco springs 4k front and 6k rear. alignment was 2 toe out front .5 camber and 8 deg castor with a 20rca adjuster. rear was 1mm toe in total and 0 neg.

Re: '87 MR2 Understeer (Doogs)

Thu, 16 May 2013 21:00:49 GMT

I have heard people's criticism of Kings before, but these turned up at a price I could not refuse. Coupled with the shocks the car currently has it has been a vast improvement over the original springs. My only complaint at the moment is the lack of rear roll stiffness due to not having a rear bar fitted.

Re: '87 MR2 Understeer (Mrskylighter)

Thu, 16 May 2013 16:13:06 GMT

I recently replaced the Kings in my AW11 with APEX springs. Massive improvement and the car sits level now as well.

Re: '87 MR2 Understeer (wiso)

Thu, 16 May 2013 15:44:37 GMT

ohh you didn't. I am so sorry. " /> HAHA

King springs are absolutely horrible in these cars. each AW I have bought lately have all had 17" wheels and kings springs and the ride is absolutely atrocious. they bottom out, they bounce badly and the draft angle on the car is not right, kings make it sit lower in the rear in the 4AGE and the 4AZGE is alot worse due to the extra weight in the rear end. Plus they also aren't held captive when at full droop.

But this is all personal opinion. I cannot seem to drive the car fast around corners with king springs fitted, I always found I would bottom out and smack guards. I could go faster around corners with even the stock springs fitted

I think general consensus seems to be good off the shelf ones are Eibach or RSR. I could not afford these I got some custom made stuff, alot of dicking around taking them in and out like 3 times getting them reset, but happy with the result.

Re: '87 MR2 Understeer (Doogs)

Thu, 16 May 2013 14:06:06 GMT

wiso
sorry doogs probably should have mentioned that what I suggested is probably more for stiffer springs.

I run on mine 1mm total out front, max castor, neg 1 per side. rear 3mm total toe in, neg 1.5 per side. its quite nice on the street. I have 2.3kg front springs and 4.6kg rear springs with 18mm swaybars both front and back.

so to answer you question I run neg 1.5 on the rear instead of max because the body roll is not as severe with stiffer springs so the camber change on body roll is not as great.

I found tyres wore very very evenly all around. front end grip was fine. more just lost it due to super**** spec front tyres.

For track/weekend I would deffinitly up that front toe to 2mm total out and I wouldn't personally run more than neg 1.5 on my suspension setup. rear I would probably leave about 3mm in and would up the neg to 2/2.5 per side

Thanks for the input, good food for thought.
I fitted Kings all round to my car recently and it already had a set of 4-way adjustable shocks.

Re: '87 MR2 Understeer (wiso)

Thu, 16 May 2013 11:35:23 GMT

sorry doogs probably should have mentioned that what I suggested is probably more for stiffer springs.

I run on mine 1mm total out front, max castor, neg 1 per side. rear 3mm total toe in, neg 1.5 per side. its quite nice on the street. I have 2.3kg front springs and 4.6kg rear springs with 18mm swaybars both front and back.

so to answer you question I run neg 1.5 on the rear instead of max because the body roll is not as severe with stiffer springs so the camber change on body roll is not as great.

I found tyres wore very very evenly all around. front end grip was fine. more just lost it due to super**** spec front tyres.

For track/weekend I would deffinitly up that front toe to 2mm total out and I wouldn't personally run more than neg 1.5 on my suspension setup. rear I would probably leave about 3mm in and would up the neg to 2/2.5 per side

Re: '87 MR2 Understeer (scz)

Thu, 16 May 2013 09:50:56 GMT

I have noticed a big difference with my '88 AW depending on how the shocks are adjusted.

Re: '87 MR2 Understeer (Doogs)

Thu, 16 May 2013 08:42:19 GMT

MonsieurDeux
aha! Fair enough then!

Look into the sw20 sway bars aswell :) Im just sorting some out now for mine

I heard this was the case, I'm a little hesitant to make the car too taily though. It's already pretty snappy when the rear decides to come out! Definitely thinking an adjustable bar might be the go.

wiso
for tyre life he doogs is close to the money for toeing. but camber for tyre life neg1 ->neg 1.5 front and neg1.5 for rear each side. you can usually go up to neg2.5 all around. maybe neg2 on the front some have saidi

Interesting to hear you'd consider running a fraction more rear camber than front, have you found front grip to be compromised as a result?

Re: '87 MR2 Understeer (wiso)

Wed, 15 May 2013 19:41:01 GMT

for tyre life he doogs is close to the money for toeing. but camber for tyre life neg1 ->neg 1.5 front and neg1.5 for rear each side. you can usually go up to neg2.5 all around. maybe neg2 on the front some have saidi

Re: '87 MR2 Understeer (MonsieurDeux)

Wed, 15 May 2013 19:30:52 GMT

aha! Fair enough then!

Look into the sw20 sway bars aswell :) Im just sorting some out now for mine

Re: '87 MR2 Understeer (Doogs)

Wed, 15 May 2013 19:29:58 GMT

MonsieurDeux
Are your tyres going to survive long with that!? lots of camber, toe in and out " /> im sure it will handle well though

Probably not lol! The car is mainly for weekend motorsport, won't really be doing much street time.

Re: '87 MR2 Understeer (MonsieurDeux)

Wed, 15 May 2013 19:15:24 GMT

Are your tyres going to survive long with that!? lots of camber, toe in and out " /> im sure it will handle well though

Re: '87 MR2 Understeer (Doogs)

Wed, 15 May 2013 17:32:02 GMT

Interesting read guys, I'm finding my car has similar tendencies. I know my tyres are crap and alignment is up the piss, something I'm looking at remedying soon. Considering 4mm total toe in on the rear, 2mm total toe out on the front, 5-6 degrees of caster and as much camber as they can get.

Re: '87 MR2 Understeer (Whore of Babylon)

Fri, 10 May 2013 13:20:13 GMT

ill be retrieving the swaybars from the 93 SW20 wreck now :) easy upgrade for my 87 aus deliverd aw11

Re: '87 MR2 Understeer (MonsieurDeux)

Fri, 10 May 2013 13:20:07 GMT

Adrian - Tyres look ok, but like you say as soon as it comes to the nitty gritty the front loses out way sooner than the rear (exception being a steep uphill on greenhill road when wet) Ill check my alignment, and see if adjusting any camber helps around the corners, especially if I get an 18mm bar in the rear

Wiso - Ill have a look if any sw20's are being split and see if I can grab their sway bars, if not whiteline seems like a good route, ill put them in and then get the tyres aligned, and see how the understeer plays up and see if i need to bring in a little bit of camber to clear up the problem.

Thanks guys