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Babkin Racing

Babkin Racing
Date: 2008-10-27 15:06
Subject: Thunderbolt
Security: Public
Tags:emra, ford
I've finally raced the Mustang again, at the NJMP Thunderbolt circuit.

The circuit is awesome. It's long, wide, fast and difficult to get right. Scary in places too. A great local replacement for Watkins Glen (which went off EMRA calendar this year). Only with more run-off areas. I guess it's the primary cricuit at NJMP, with Lightning being more secondary. Read more...Collapse )
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Babkin Racing
Date: 2008-09-23 17:32
Subject: fixed
Security: Public
Tags:aerodynamics, fan, ford
I've fixed the Mustang. Steve has provided the body parts from his parts car. The frame was not hit at all. The left fender got bent so much exactly because the harder impact on the other guy's wheel has missed the frame rail.

Besides bodywork, the broken stuff included the radiator, its fan and the power steering pulley. Strangely, the P/S pump seems OK, just the pulley got bent when hit by the radiator. Well, I've got a whole P/S pump with pulley anyway. I've found that the p/s cap is designed with a rubber flap sitting on it. This flap is not included on the replacement cap, I guess you're supposed to move the old flap to the new cap. I've got one with my "new" pump. It should improve the leaks from the cap's vent.

When I've turned on the fan for the first time, I've thought that I've put it on backwards. I could feel little air flow behing the radiator and a lot of flow in front of it. Applying a sheet of paper to it has shown that the direction is right. I suppose, it's the small opening in the bottom of the Mustang nose that makes the air to go fast. I went to an M-club autocross, and the cooling was OK but not exactly great. So I've set to drill the 3/4" holes in the upper part of the nose. It looks surprisingly good. If the holes were placed straighter, it would look like it's been designed like this from the factory. Reminds me of a vintage Alpha-Romeo.
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Babkin Racing
Date: 2008-07-03 12:46
Subject: rear wheels brake, front wheels turn
Security: Public
Tags:brakes, driving
I've been noticing that I can get my Mustang to handle decently if I downshift right. If I don't downshift where I need to, I can't turn. The car just plows straight.

But downshift at the right place and the car turns beautifully. It's the engine braking. When I lift the clutch pedal after downsifting, there is definitely more braking force. Sometimes the read wheels even slip. So when I lift the brake pedal and turn in, the car is still braking into the turn, and doing it with the correct rear axle, without putting extra force on the front wheels that do the turning. And the car turns!

I guess a lot of my issues with driving the Mustang come from teh rear drum brakes. These are just too weak to match up with the fronts, and keep the car stable. But the engine braking helps in the rear and makes thecar turn. This is probably a good universal recipe for any RWD car.
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Babkin Racing
Date: 2008-06-20 12:51
Subject: Torsen
Security: Public
Tags:camaro, differential
There is a classic joke:

An old Jew is at his deathbead. His whole family is around him. In the family he was famous for making great tea, like nobody else could. So the family asks him: "Grandpa, please, tell us the secret recipe of your tea!". He collects the strength and says "Allright, since my time has come, I will let you in on the secret: put more tea leaves, don't skimp!"

So I've been having issues with my limited slip differential. It definitely wasn't working. I've been spinning one wheel, and on the data logs I could see that the my accaleration from the start was worse than other's. It's already my second Torsen, and it's been there for just one year.

From the previous experience I've remembered that the oil was important: with the oil without limited-slip additive, the diff was not working well (even though Torsen people say that this additive is not needed). This made me think that maybe the oil got worn out. And changing the oil is much cheaper than changing the diff. I went and changed the oil. What a miracle! Now the diff works again!

So it looks like the secret recipe for Torsen diffs is: change the oil often, don't skimp!
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Babkin Racing
Date: 2008-06-17 14:36
Subject: how things go worse (BeaveRun, part 2)
Security: Public
Tags:brakes, crash, emra, ford
On Sunday morning the practice started pretty decent. The lack of the Panhard bar didn't seem to hurt at all. If anything, handling probably became better. The car felt a little better and the tire temperatures were more even between the front and rear tires. I don't know, maybe my second Camaro-like rear sway bar does some lateral axle location. Read more...Collapse )
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Babkin Racing
Date: 2008-06-16 17:34
Subject: how things start bad (BeaveRun, part 1)
Security: Public
Tags:emra, ford, fuel, issues, suspension
More than a week ago now, I've been racing at BeaveRun. Everything went completely ass-backwards. Read more...Collapse )
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Babkin Racing
Date: 2008-05-29 13:00
Subject: Murphy's law
Security: Public
Tags:electrical, fan, ford
Or whoever's law that says: "If a device is protected by a fuse, the device woult burn out first and save the fuse".

The temperature in the second race at Pocono South was getting a little high, so afterwards I've checked the fan. Read more...Collapse )
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Babkin Racing
Date: 2008-05-09 14:43
Subject: now the good news
Security: Public
Tags:cylheads, ford
The new cylinder heads work. Nothing's blown up yet, after 3 days of racing, so it should be holding up well. And in the data logs I consistently see about 40 HP more than in the logs from last year. Sometimes I even see as much 80 HP but that I think is a figment of imagination: I just arrive to the downhill sections with more speed, and the same downhill G force counts up as more horsepower.
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Babkin Racing
Date: 2008-05-09 13:40
Subject: are we out of fuel yet?
Security: Public
Tags:ford, fuel
Back at Shenandoah I've noticed that the car seems to be running out of gas on the straights. Especially after the long left turns. Which is kind of weird, since the fuel pick-up is located on the right side of the tank. And the lambda display was showing lean, and the spark plug condition was showing it too.

So I've tried to adjust the pressure regulator. The only effect has been that the mix went rich on idle, still cutting off at full throttle. Weird part, nothing of it was showing on the dyno.

I had to do something before the next race. Read more...Collapse )
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Babkin Racing
Date: 2008-05-09 12:39
Subject: EMRA Sprints at Pocono South, May 4
Security: Public
Tags:emra, ford
One more race done. In fact, two races. Everybody liked the Shandandoah two-races experience so much that EMRA has added the second race to Pocono South as well. Since it was the last-moment addition, it was non-points. But it was free, no extra charge. Read more...Collapse )
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