SCCA H Street setup

[m3kerry]

Quick intro then questions

Any of you that do SCCA autocross on a national level have probably seen my BMW 1M that won B Street Pro-Solo nationally in 2017 and B Street Nationals in 2018.

My oldest is finally old enough to autocross and I'm building an H Street car for him. I need some help with the basic 'known good" setup for the car.

Wheels - 16x7? What offset and brand?
Spacers - more offset in the front or back or just leave it stock?
Tires - RE71? 205/45?
Alignment - ?
Sway bar - assuming rear bar? What kind?
Shocks- Koni yellow?
Cat back - ?

I have read the tire thread and a couple of more I found here but with nationals just finishing looking for the latest knowledge.

Thanks in advance!

 

[RubenZZZ]

Sweet bimmer.

Your son is gonna have one sweet FiST.

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[m3kerry]

Still figuring out the wrap. Wonder bread lol

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[DAPR]

Re71r 205/50/16 16×7 rpf1. Yellows, rear bar, drop in filter. Lightest catback you can find. You know the drill.

 

[m3kerry]

I do just want to hear from a few people.

Alignment?

 

[HoboBob]

The OZ Ultraleggeras have worked out well for me.

Interested to see what others are doing, but I'll probably jump out of H Street pretty quickly since the local group that I run with just does indexing rather than classing.

 

[m3kerry]

tire rack has wheels for about 100 bucks that will work for the 1st set. Looks like the 16inch wheels with a 205/45 drop an inch off of the height of the car.


where do you guys source parts like the shocks, cat back and rear bar?

 

[m3kerry]

Just FYI, if you're worried about the speedometer and odometer calibration, I believe you can set a new rolling diameter using FORscan. Don't quote me on it, though.


Check out the vendor forums. Whoosh Motorsports (Ron) has a great selection of parts. Pierce Motorsports make just about any chassis brace you could want for the ST, if that is what you mean by rear bar.

thank you.

Rear sway bar (anti roll bar)

I will look in the vendor forum

 

[m3kerry]

SCCA stock class rules will allow for replacing one of the 2 sway bars. On a front wheel drive car the rear wold be the one to replace.

The brace would bump the car to an 'ST' class and I want this to be a street class car for my oldest child. less money and will work as a daily driver.

 

[m3kerry]

I got the car. The 2nd gear on stock wheels and tires looks to be about 55mph.

On 16 inch wheels with a little lower profile tire what are people seeing for the end of 2nd gear?

50?

 

[HoboBob]

I got the car. The 2nd gear on stock wheels and tires looks to be about 55mph.

On 16 inch wheels with a little lower profile tire what are people seeing for the end of 2nd gear?

50?

I hit 57 at the rev limiter on 45/16's

https://youtu.be/3ytBK1_WVtc

Not sure I'd go any lower than 45 though since that would be the stock equivalent.

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[m3kerry]

this is good. 57mph will work.

 

[Speedboosted]

Going to follow this thread as I've had thoughts of de-modding a little to run HS. The Fiesta seems to be a very competitive car in that class and I really like the low cost of mods allowed. 16x7" ET42 Team Dynamics Pro Race 1.2's, 205/45-16 RE-71R, Bilstein B6/Koni Yellows, Eibach rear sway bar and you're pretty much set it seems. I would keep the AP, but just flash back to stock for events of course.

Is an intercooler allowed? I think no, but want to make sure.

 

[Meowoosh]

Nope IC moves you to STH or SMF idr

 

[Speedboosted]

Nope IC moves you to STH or SMF idr

Lame...well at least it doesn't get super hot up here so I probably could live without it.

 

[Plainrt]

Rear sway on these things seem to be hit or miss in hs.

 

[Meowoosh]

I recommend it if you like a tossable style. No need if you want all out grip IMO.

Recommended running the heater on full blast during your run, and just aim the vents out the window. The heater core pulls a lot of heat from the coolant. In fact, this is the only way I can run my HS prepped car at Texas Summer events over 100*F.

 

[m3kerry]

I recommend it if you like a tossable style. No need if you want all out grip IMO.

Recommended running the heater on full blast during your run, and just aim the vents out the window. The heater core pulls a lot of heat from the coolant. In fact, this is the only way I can run my HS prepped car at Texas Summer events over 100*F.

Good to know


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[M-Sport fan]

Recommended running the heater on full blast during your run, and just aim the vents out the window. The heater core pulls a lot of heat from the coolant. In fact, this is the only way I can run my HS prepped car at Texas Summer events over 100*F.

Yeah, since an aftermarket radiator is also verboten in H/Street (which is ridiculous!).

 

[m3kerry]

Dont get me going on camber plates.......

I looked for a pic of the tires but I think my tire bill would be cut by a couple of sets on the 1m.

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