MCNSPORT latest ae86 project **MUST SEE**

[improvedae86]

Darren I think you might be getting a little carried away with the word "superior" .

If the arm locations are futher out by 10mm 5mm each side that might have been needed for many reasons from the track needing to fit the body with those skinny standard wheel , to wider diff flange's reducing cv angle's available. Or for yes a wider track difference and higher roll center to match the car's center of gravity. For sure S13's are mostly lacking drive traction over S14/S15 but once there are aftermarket adjustable arm's different spring/shocks different offset wheels , wider rubber , different bushes etc used there are so many variable's anyone could spend alot of time modelling or maybe year's testing to find not much difference.

I have driven standard S13's S14's S15's and with every series they are better in most area's but if i was relating it to drifting/loss of traction , i feel a S13 is easier to control maybe due to it being lighter , i found S14's a snappy car to drive and S15's far better in most area's of grip. But then a S15's is a S14's floorpan with more reinforcement so that might have more to do with handling then just a subframe difference. There are so many change's between model's that i wonder if any of the better or worst point's of there S series rear end has any meaning once it's placed in a far lighter car with totally different everything. I bet there are alot of people here who have had all the S series car and AE86's, they might have had no problem making there AE86 have a higher cornering speed even with basic live axle.

Personally to me the cost of a S14/S15 rear end being more than double a S13 rear end here that needs many changes in geometry for track use anyway doesn't make it worthwhile . The 10mm less track fitting better under a AE86 without the need for huge flare's maybe a plus for people too. Depending on there wheel size used they might be able to have no body changes, i know 40 offset R32gts 6.5" rims on a S13 rear end fits under a AE86 with no body changes. The extra drag created making the car wider might not bother people at lower speed's but anyone trying to keep up with lot's of low figure modern car's without huge power is going to struggle. I have no idea of what speed's really are on track's in most country's but local track's to me have average speed along there straight's over 210ks or 130mph, I have seen 252ks 156mph recorded in my car without tyre growth and that isn't going to happen with it's stock lower cost engine if i made the frontage area 5+% larger.

If you want to relate to many books writen on vehicle dynamics/handling and many computer program's then you would soon come to the conclusion that having a wider actual front track than rear produce' better manoeuvrability / turn in without needing a forward weight distribution. Adding futher making the vehicle's track wheelbase ratio less might produce kart like handling with very little weight transfer which is fine left in the kart since it has no weight to start with.

A perfect example of this was the raceflo ae86 drift car , huge wheel's making it a nearly a square ratio , vehicle was a complete flop with over $80.000AUD spent on everything , powered by 3sgte to 13bt to ls1 ?, transition from total understeer to snap oversteer had all it's driver's heading for any other car to drive.



I have no idea that drift had rules ? You talk of mounting the subframe as high into the chassis as you can within the rules ? How are there rule's that allow for cutting into a chassis to fit different suspension/axle but they limit it's placement with a certain roll center range. How would they know the roll center ?