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I don't have time for racing this year really, and unfortunately I think my GSXR is getting weak. But since everyone is going to Mid-Ohio, I will do my best to come too!

If you have no track experience I would actually recommend you both do some track days. Any non-suv car is fine for that. That will get you started on track driving.

As far as what car if you are...

Hi Guys,

As may be noted by my absence from this forum lately, I have been extremely busy of late. As such my plans for P2 racing this year are likely to be scaled back significantly. In order to...

RA is a bit of a hike for me, but I'll start looking at some more races in OH and MI. Vaughan if you are going to mid Ohio any particular time please let me know.

Anyone know what happened to all the P2 guys?

Last year we had decent numbers. This year I think I might be the only p2 driver who has turned a lap in the northeast conference. I was the only one...

Wow, I see I am way behind on this!

If anyone wants an excuse, I have a pretty good one. For anyone interested in building, see here:...

Ok, moving on. I decided that I didn't want to go the the Runoffs with bias tires. I have very little time for working on the car this year, but I couldn't make peace with the idea that I was leaving...

Ok, I finally have a few minutes to add to this.

First off is some info on vastly improved (IMO) chain adjustment.

The old turnbuckle system would take me over an hour to do a sprocket change,...

Many of my favorite stories have begun this way.....

I live in west Virginia. It doesn't get much more nowhere than this. I wonder if it is a California carb thing? If so I apologize, I hadn't thought of that.

FYI, current Mobil 1 has anywhere from...

Yes but you don't need or even use the protective layer under normal conditions. There is never metal to metal contact under normal conditions.

Bull.

Every parts store I've ever been to has had at least one brand of 'racing' oil, all of which has more zddp than you need. So does redline, so does Mobil 1. If you Google it, there are plenty...

I wasn't actually referring to the author with my comment. I agree with everything in the article. In a previous position I was paid to do many hours of engine oil related research and can confirm...

It has always amused me that many people will swear by a certain brand of oil, but then not trust the engineers at that brand to know what applications their oils should be used for....

I have been treated very well by Goodyear. Contact Jay
jaychapman@goodyear.com

A few things from last weekend at Watkins Glen HST:

1) The new chain adjusting system worked great! Took a sprocket change from a 60 minute ordeal to a 10 minute job. I will post pictures later.
...

I made several other small changes over the winter, including a new fuel test port since I got griped at about the old one. I was pretty excited for Road Atlanta this spring, but between not knowing...

Ok, time for an update. Sorry it took so long.

Remembering back to the axle issue, I ended up making new gun drilled axles which are both the same length, and a spacer for the LH side.
...

Yes a tray under the engine will help. .040" aluminum is usually fine.

The diffuser is arguably the most important aerodynamic part on the car. Definitely build one. Make sure you read the p2...

Ted: yes I have the fuel cell.

All: I found a pair of old Hoosier 22x9-13s and put them on today. No major fitment issues. One small bracket will have to be cut off and rewelded tomorrow, and I...

Ok guys, I have a couple of events under my belt since I last posted here. I didn't have a great time at Road Atlanta, but did OK (5/7 saturday, 4/7 sunday). I was in better form this past weekend at...

I have been notated for not having one at a Supertour.
Return line will work fine.

I personally do not recommend a Schrader valve as there is too much risk of leaking, but that's what most...

Where in the gcr do you see that?
Per the engine table no engine mods. Nothing I can see about the rest of the car....

I agree with all above that you should forget p1 and run in P2. I still think it will take some work to make a wsr competitive, but I don't see why it can't be done. P2 also eliminates your floor...

^ I have tried that but I can't do it, for some reason my brain can remember a speed and still use the tach for shifting but not an RPM.

I thought it read off the wheel. If it is on the sprocket...

Mine is a '98 AM7.

I was hoping to find out the stock sensor radius, then I can figure out the right radius to mount the sensor on for my tire size to get a correct speed reading. It doesn't have...

Super Tour is March 11/12.
I will be racing P2. Never been to Road Atlanta before, just wondered if there would be much turnout?

Of course I would be happy to meet anyone else who might be...

Actually I was hoping to replace my speedometer and tach with it to make more space on the dash. A digital dash is in the future some time but I can't afford it right now, I thought this might be an...

My car runs an 05 gsxr1000 engine and I find myself in need of a couple pieces of info and no easy way to get it.

1- basic dimensions of oem gage cluster.
2- radius of speed sensor pickup.

If...

This is my concern. If I start the diffuser at the front of the tire as required, there is no way to make it pass below the lower control arm unless I add limiting straps for basically zero droop....

Hi David,

Can you elaborate about the rule change? This is the first I have heard and didn't see anything in SCCA bulletins.
Send me a pic of the diffueser. I doubt it will work on the AMAC but...

Nice to meet you as well Vaughan!

Sorry all I realized it has been months and I have not updated this....

I had a pretty good weekend at PittRace in May. We had several guys in P2 and I had a...

Minor update:
I have had an extremely busy winter and no time to work on the car.
That said I made a pair of new axles, made some lightened CVs, and a CV spacer for the left side. All told it...

Gents,

I used to race in FC. My plan was to convert the car to FB eventually, but this exact discussion and the merge into FA convinced me that it wasn't worth the money. I own a shop, but I don't...

I agree with others that most all of the open wheel and sports racer classes are great places to start.

You would be surprised how much interesting engineering can be accomplished even on an...

A couple of side notes from this weekend also:

The car felt pretty fast and judging by my lap times I think it will be very competitive once it is finished, especially since I have never put new...

^ There is no need to adjust bump steer once it is correctly set, and IMO, stacks of washers are never a safe option.

Anyway, back to my race weekend, as mentioned I had an axle shaft pop out of...

OK, I finally have a few minutes for a quick update here. As you may have noticed, I got the car put together in time for the PittRace Super Tour last weekend. I didn't finish everything on my to-do...

Thanks for the info!
That is very good to know on the clips but still something is off. Maybe it is the diff as you say.

I will tear it down and do some measuring once I dig out of the hole I put...

The broomstick test is included in the gcr.... 9.4.5.A

I will type up a weekend report soon. In the meantime, I have a question I bet one of you guys can answer:
The axle shafts on the amac seem...

Also I appreciate all the suggestions and discussion from you guys. I am not ignoring them and I do have various talking points regarding wing, fuel door, and etc. Now it is time for bed though, I...

No, he (or someone) made it shorter. Best I can tell Craig had the stock bar, and sometime between he and I it got shortened drastically, but not properly, hence the splint. I am almost finished with...

If you look at Craig's picture from post 13 and then my picture from when I got the car, you can clearly see the difference. Also it was obviously cut and double sleeved in the middle of the hoop....

Well I was too busy this weekend, but I had a little free time this afternoon, so I made some progress on the new roll hoop.
The old hoop as best I could tell was shortened about 12" from the...

Sorry I have been pretty busy lately and no time to add to this. On the plus side I actually have had a little time to work on the car, so some new updates will be coming soon. As to the original...

Hi All,

OK, today's installment will be all about the rear diff. Not very exciting, but there was a lot of work to do here.
You can see in the before photo that the main diff supports have been...

There is a one-way valve on the fuel cell for that reason!
I would have liked to put it somewhere else but that was the safest place I could find within reasonable distance from the tank.

Per GCR 9.4.5 (C) 1:
The main hoop must have 2 forward braces extending from the hoop and attached to the frame,monocoque, or front hoop. etc...

There is nothing about these being straight. Of...

Thank you all for the kind words!

Today's installment will be about the rear wing; there were several things I didn't like:
1) It was mounted to the bodywork and not the chassis
2) Didn't look...

I'm not really into body work, and the car looked OK with the vinyl wrap, but there was some damage underneath it, and also a couple things I didn't care for.

For one, I didn't love the look of...