Class rules compliance inspections


#1

We’ve not been doing much in the way of compliance inspections so far this year and I want to change that. So far tho, most of what I’ve been doing is running around the paddock trying to find that key video that will exonerate . But compliance inspections need to be done. For most of us, this will be our first time at Nationals. It would be pretty embarrassing to end up at odds with NASA National compliance inspectors come end of Aug. If that happens to you in Aug, and your cause is righteous I’ll help argue your side. But I’d rather fix things now by encouraging folks to, ah, not stray.

You may have heard rumors about this, but last month NASA compliance inspectors had some folks pull their intake manifolds and check intake ports and injectors. There was clear evidence of intake porting and valve under-cutting. We are not used to that level of compliance inspection in the SE. Personally, I hope we never get to that level of compliance inspection. But that gives you an idea of how serious NASA compliance inspectors are.

So I’ve been thinking how best to do compliance inspections. I’d much rather set everyone up for success then play gotcha and embarrass someone in front of their peers. With that in mind, here’s some things to think about before you pack your car up next week.

Things that are likely to be inspected at RA.
-Crank position sensor bracket.
-Flywheel check with magnet and the R. Patton profile tool. If you go ahead and drop your flywheel inspection plate now, you won’t have to hassle with it at the track.
-Thickness of engine mounts.


#2

Great idea Ranger. The last thing we want is to get called out on something that we thought was legal at Nationals.


#3

Why the CPS bracket? What do people do to it?


#4

[quote=“turbo329is” post=77180]Why the CPS bracket? What do people do to it?[/quote] You can monkey with it a bit and change ignition timing. To spot the cheat you pull the top bolt and look to see if the hole in the bracket is still round and 8mm.


#5

While we’re asking, what’s the deal with engine mounts? Lowering CG, or something more exotic?


#6

Lowering center-mass. Some engine mount designs make this easy. Can be tough on the oil pan tho.


#7

Well in that case, jump in the car, hit the track, and go off hard in T1 over the gators. If the oil pan gets broken, oh well :laugh:


#8

Let me get this straight. Valve undercutting is illegal yet it is specified in the BMW shop manual as a way to narrow the valve seat to specification???


#9

A bunch of material was removed from the valve stem. Is “undercutting” right word for that? I might be using the wrong word.


#10

Undercutting is using a valve grinder, generally at a 60 degree angle, to narrow the seat on the valve. It is specified in the BMW shop manual. Narrowing the stem where it meets the valve head is not specified.


#11

You have a catchy word or phrase that means narrowing down the valve stem?


#12

None other than changing the profile.


#13

Here’s an example of what I mean.


#14

What is the minimum thickness for the motor mounts? My right one is well done and IE is out of stock, so I might just make a new one.


#15

There is no min. thickness, they should all be oem thickness. Measure your good one.