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DaveEstey
DaveEstey PowerDork
6/20/17 8:07 a.m.
DaveEstey
DaveEstey PowerDork
6/20/17 8:09 a.m.

The RX7 returned to hillclimbing this weekend, competing at Okemo. The car needed some adjustments, mainly from the driver, but confidence quickly grew and times dropped. By the end of the weekend we had earned a P3 class victory by a margin of three seconds.

I'm sure there's more time in the car, but it takes time to find the limits of a car. This weekend I'm running a 2-day track event in Canaan NH, which should help us further dial things in.

MichaelYount
MichaelYount HalfDork
6/20/17 12:06 p.m.

Congrats! Was the glare inside the windshield as distracting to you live as it appeared in the camera?

java230
java230 SuperDork
6/21/17 9:40 a.m.

Is the headlight possessed?? Looks like a ton of fun.

DaveEstey
DaveEstey PowerDork
6/22/17 9:44 a.m.

Big bump must have lifted it enough that air got under it to hold it

DaveEstey
DaveEstey PowerDork
6/27/17 9:25 a.m.

Took the car to a 2-day autocross event at Canaan Motorsports Club in Canaan, NH. The course took place on the track with some cones to create a little extra drama and drop speeds to "reasonable" levels. Still, I was at 8k rpm in 3rd, which is over 80mph.

On Saturday my setup guy was also racing, so I made full use of his spare time and we took tire temps. Rears looked awesome with a 7 degree difference across the two and both around 150 degrees. The fronts were also close to eachother, but only 110 degrees - not good and explains the car's push.

Sunday I kept taking air out of the fronts until I got down to 15psi - and that's when the push stopped and when the end started getting rowdy again. Sadly I ran out of runs to keep tuning things, but I think a couple clicks less compression in the rear will stabilize things and we'll be golden.

In the end I took two podiums in my class over the weekend, with a 2nd and a 3rd. That made me 2nd in class for the weekend. I'm not mad with that result.

MichaelYount
MichaelYount HalfDork
6/27/17 7:14 p.m.

Back when I was racing SCCA/ITC, I ran 205 section tires front and rear on an old RWD Corolla. Never could get that size front tire warm enough to stick like it should. Dropped down to a 185 section tire on the front and things got MUCH quicker. Also provided the benefit of buying used Spec Racer tires (205 rear/185 front) from the fast guys who'd put new tires on for every race....

MichaelYount
MichaelYount HalfDork
7/8/17 10:42 a.m.

Seemed appropriate here --- https://www.youtube.com/watch?v=5pjVufQXxXE

dextervw
dextervw New Reader
8/25/17 3:44 p.m.

where are the updates? Pictures? The burst ear drums?

DaveEstey
DaveEstey PowerDork
12/5/17 4:07 p.m.

In reply to dextervw :

The car has been chilling in my trailer while I was funemployed for the summer. I got restructured out of my very lucrative position June 16th and didn't go back to full-time employment until October. Teaching cops advanced driving techniques only paid the bills. 

She'll be back in action in 2018

Dusterbd13
Dusterbd13 MegaDork
12/5/17 4:23 p.m.

Just glad to see you back!

DaveEstey
DaveEstey PowerDork
12/15/17 10:19 a.m.

To be honest the new forum layout has been keeping me off.

But this is the only place I update the process of blowing money on this thing so I feel tied to it!

KevinGale
KevinGale Reader
12/15/17 11:39 a.m.
DaveEstey said:

To be honest the new forum layout has been keeping me off.

But this is the only place I update the process of blowing money on this thing so I feel tied to it!

 

I hear you! I feel much the same way.   Being this far in I am now wondering if I should have just hosted my own blog like I ended up hosting my own photos after the Photo Bucket disaster.  I'm sure I could setup something on my domain but I don't really want to start over or recreate everything.

 

DaveEstey
DaveEstey PowerDork
1/22/18 8:01 a.m.

It's the offseason, I don't have a shop space and I need a project.

 

Introducing the Loose Dzus Racing Kartacular

 

It's mean. It's kinda green. It's a flathead Briggs engine running on methanol and it is a bit crusty. However, the price of $300 with a pile of spares means  it's a sore  dick deal - you can't beat it!

DaveEstey
DaveEstey PowerDork
1/22/18 8:02 a.m.

Step one: Say I'm only going to clean it up a little and then run it.
Step two:
This.

DaveEstey
DaveEstey PowerDork
1/22/18 8:05 a.m.

Tear down reveals that it's mostly good and the bad parts are easily remedied. Since I can't leave well enough alone though out comes the degreaser and the paint cabinet gets thrown wide open.

Primed.

First coat

And back inside where it belongs

DaveEstey
DaveEstey PowerDork
1/22/18 8:07 a.m.

The exhaust was barely bolted to the engine, so I decided to check out why. Turns out the bolt holes are a little wallered out and will need to be cleaned up and tap'd.

But while I have it off why not...

 

DaveEstey
DaveEstey PowerDork
1/22/18 8:10 a.m.

This thing is really eating into my "spare things I own, but didn't have a purpose,"  collection.

This wheel was previously in the Hillclimb RX7.

 

The suede is going to get gross really quickly.

Thus ends my first day of kart ownership.

What's next? Different clutch, knobby tires with kold kutters and some ICE RACING.

Oh yeah, I'll also be making some carbon fiber parts  for it.

KevinGale
KevinGale Reader
1/22/18 9:34 a.m.

Quick build.  It should be done in time for Ascutney.  Wouldn't that be a scary ride!

java230
java230 SuperDork
1/22/18 9:40 a.m.

Awesome, I have been looking for a cheap kart.....

drivendaily
drivendaily Reader
1/22/18 11:02 a.m.

I may actually have a 'standard kart' clutch for that sitting in another box. I'll have a look after work today.

jmabarone
jmabarone New Reader
1/22/18 11:41 a.m.

Get a rebuild kit for the carb and replace the fuel pump diaphragm.  Methanol eats those things up pretty quickly.  When you run it, make sure you flush the tank with straight gas and run the engine a bit, then dump some marvel mystery oil down the intake and pull the plug wire when it starts to smoke pretty well.  Drain the gas and she is good for storage.  

Also, you are going to want to get a chain guard to keep the seat from coming over into the clutch.  Never had one get me, but I've had clutches eat up the seat pretty well.  

I can't remember the carb jets to get it to run methanol, but they are larger than the prescribed gasoline jet.  That pipe will be pretty good for lower end power too.  When we first started, we ran a 98-3 cam in the engines, which was decent on the bottom end but kinda weak up top.  We finally ended up with a 7X cam and that thing would rev as high as you would want it to.  Running the stock class with one of the older cams, you should be able to get 10hp out of the engine with methanol.  You may have to run it up to 6k to get it.  

DaveEstey
DaveEstey PowerDork
1/22/18 1:35 p.m.

In reply to KevinGale :

I'll have it at Ascutney, but only for Pit duty.

DaveEstey
DaveEstey PowerDork
1/22/18 1:37 p.m.

In reply to jmabarone :

Is it really just the carb jetting that lets these things run on Meth? I was curious about that and know nothing about flathead briggs other than lawn mower  duty.

jmabarone
jmabarone New Reader
1/22/18 1:59 p.m.
DaveEstey said:

In reply to jmabarone :

Is it really just the carb jetting that lets these things run on Meth? I was curious about that and know nothing about flathead briggs other than lawn mower  duty.

We ran different spark plugs, but I don't recall them being anything crazy.  IIRC, we ran NGK plugs that didn't have an electrode because the hot cam would throw the valve up and hit the plug.  That was how those engines would make power in the "stock" rules class.  

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