Track Day Project

[z31maniac]

^Then why aren't you running 275/35/15s!

[Brian D]

dude it's a race car, does that really matter? :p

they look like pizza cutters to me, but I guess I like baloon tires. ;)

Looks aside, I think the 235/50's would feel a little "sloppy" compared to 225/45's. Ultimate grip would be higher, but turn in and transition feel would suffer. I've run 225/50's on a 7" rim, and right now I have 195/55 Z1's-I greatly prefer the skinnier tire for overall track use. My next set will be the TR wheels with either 205/50's or 225/45's.

My opinion, FWIW.

[nando]

^Then why aren't you running 275/35/15s!

because 235s are actually pretty cheap! Hell, it's hardly worth it to buy a dedicated street tire, which is why I haven't yet.

oh that, and I dont realy want to cut into my fenders any more than I have to run wider flares. :p

[Dyno4mance]

dude it's a race car, does that really matter? :p

they look like pizza cutters to me, but I guess I like baloon tires. ;)

I have found with my track experience that a bigger tire is not always better...although autocrossers here in the states tend to have one mantra "the wider the better" ....well maybe this is the case with autocross (along with very very hard suspension systems) because of the relatively low speeds involved different charictaristics apply but on a road course if the side wall is too big it really messes with the whole feel and transition of the car...
The cost of the tire really did not factor into my decision although I would like to stick with Toyo's for the time being..
I think a 225 section tire will be plenty of tire for the wieght and power of my e30....But with all things it is possible I am wrong

[travis816]

this car is rad!

[ikkitousen]

any updates???


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DAMN SECHSAY!!!

[Spiff325iS]

This is an incredibly glorious build, absolutely incredible. It truly is an inspiration because when I graduate in a year this car is what I will be aspiring to build(though I doubt I'll get even close!).

Dan

[Dyno4mance]

any updates???


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DAMN SECHSAY!!!

No updates as I am having a lot of problems with the megasquirt that was built for me...car is still not tuned...I will post videos when I have them

[Dyno4mance]

This is an incredibly glorious build, absolutely incredible. It truly is an inspiration because when I graduate in a year this car is what I will be aspiring to build(though I doubt I'll get even close!).

Dan

Thanks for your your props....this is the only car I have built for a long time were all of the choices and decisions were mine....One of my favorites

[markseven]

You'll love the sound. Keep the 4.10s, too.

With 220+ HP, the 4:10 may be too low.

why didn't you go for the 235/50-15s?

Looks aside, I think the 235/50's would feel a little "sloppy" compared to 225/45's. Ultimate grip would be higher, but turn in and transition feel would suffer. I've run 225/50's on a 7" rim, and right now I have 195/55 Z1's-I greatly prefer the skinnier tire for overall track use. My next set will be the TR wheels with either 205/50's or 225/45's.

My opinion, FWIW.

+1

Turn-in, additional weight, additional rolling resistance...

[2002maniac]

225/45/15 is the perfect size for E30's

[nando]

With 220+ HP, the 4:10 may be too low.

maybe, but not if you have a high enough redline, and a motor capable of making power up there. a schrick 288 is definitely capable of 7200rpm.

Turn-in, additional weight, additional rolling resistance...

valid points, but I haven't noticed anything with these, other than maybe weight. and they're still lighter than an equivalent street tire. technically, the 225/45s are undersized. I woudln't mind either, really.

[Dyno4mance]

What would be an alternative to the 4:10....? 3:93 or 3:73 or even lower??
Finally got it running tonight...will be hitting the dyno tomorrow hope my problems are behind me now...

[tn325i]

Really glad to hear things are coming together now Andrew... I want to come down and get a ride in that car.... It is really incredible and you have done a fine job on it..

[Dyno4mance]

A few vids as promised....

http://www.youtube.com/watch?v=UnswIsPFW6M

http://www.youtube.com/watch?v=JaXH8RfkErQ&feature=related

Now I need to get a good alignment and figure out a few gripes and I will be getting some incar footage soon....watch this space
It made 168 whp on our Dyno dynamics dyno with initial tune....Just for reference spec e30s usually put down around 137 -142 whp on our dyno
Cant believe how fast it revs....
Special thanks to tn325i for doing the closed course camera work :D:D