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What happened to your ChampCar today? - 2020


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So, we officially took two cars to a track day at Autobahn Full Course today....believe it or not, both cars had zero issues and drove back on the trailer...this is a first for us in 7 years of racing

☝️These guys: fun at parties. 

Not very solid logic, but by spending a little bit of money on a new electric tongue jack and some paint for the race trailer  I was distracted away from spending lots of money on the race car.

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Just started the car for the first time since indy. Something is going on in the motor. Way down on power. No engine codes, no blowby coming out of the oil fill, good fuel pressure, new plugs,  just feels really flat like its down 1/3rd of its horsepower. Idles fine too. Welp, off season to rip the car apart and figure out what's going on. 

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On 10/17/2020 at 8:37 PM, Lethal Cliff said:

Show some pictures of the pit cart.  We are getting ready to build one and looking for ideas.


It was built by Irvan-Smith here in Concord. Exactly like this model but mine has a Snap On tool box not the Lista. Couple add on pieces too. And less than half the cost. It was cheaper than a new roll around toolbox to replace the cheap Husky model I have bent to poop rolling it in and out of the trailer. 
https://www.irvansmith.com/scart/irvansmith-is5stbw02-wagon-small-with-toolbox-p-538.html

Edited by TimS
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Finally finished lighting and lighting wiring, installed new shifter, topped off the trans fluid, driveshaft installed, motor mount in and tight. 
next up is exhaust system. I have to fix one of the mounts that got bent. 

 

Edited by TimS
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Friday was Dyno Day!  Still needs a lot of work in the not idle or WOT range, but at least we were able to get some good baseline timing numbers and AFRs dialed in for WOT.

 

Removed the secondary manifold runners butterflies and actuation shafts, went to a simpler intake tube (no more MAFS!), and a REAL K&N air filter (how's that for cost creep?!).

 

Final tally was +11 hp and +4 torque.  The really incredible part is torque at 2500 rpm is 144, and max at 4600 rpm is 154.  Pretty damn flat!  Also drives completely differently now, feels much much faster and sportier.  Not sure how much the shape of the curve changed, but the car feels miles better now.  I was shocked at the difference, because 11 horsepower just doesn't seem like all that much.

 

ILR_MicroSquirt_Dyno.thumb.jpg.60a079982d03828b9eaaa7e107b5c5d7.jpg

 

 

I also welded up some control arm extensions to replace our bolt-ons thingies:

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And we added nostrils:

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And there's more money in wheels and tires in the tacoma than the tacoma is worth (we're finally going to something sticky, and the Azenis were significantly cheaper than the ventus):

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Still to go: new splitter, finish cleaning up wiring, tune AFR everywhere below 90 kpa and above 1500 rpm, integrate new shift light/dash, install new gauge pod and gauges, bullet-proof our battery tie down (someone else's thread scared me), put some tape over the holes in the bumper caused by our MCM encounter, install new control arms, replace one CV axle, brakes, oil change, alignment, and optimize our y-pipe.

 

Only two weekends left before Sebring.  This is gonna be close.

 

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7 hours ago, RandomTask said:

Yall ever heard of a shop that won't sell time on their dyno for a baseline run? They only want to do tuning. I just wanted to see how much power I lost but apparently thats not allowed. 

 

That's crappy.  Local (sorta dodgey) shop here let me tune the car myself on their dyno for $60 an hour.  Was pretty happy with that.

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On 10/23/2020 at 1:44 PM, RandomTask said:

Yall ever heard of a shop that won't sell time on their dyno for a baseline run? They only want to do tuning. I just wanted to see how much power I lost but apparently thats not allowed. 

That sounds fishey for sure.  I used a local dyno to finish breaking in a new engine.  Ran the car for about 45 minutes and shop didn'teven charge me for the full hour.  Checked HP and exhaust gas analyser.  

Edited by TimS
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Wrapped up exhaust system fixes. Lights are ready to go. Almost done with cool suit install. Also swapped out the helmet blower fan with a quieter model. Swap the tires to the test session set and install the hood. Test drive through the neighborhood this weekend. 

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On 10/25/2020 at 9:06 PM, TimS said:

That sounds fishey for sure.  I used a local dyno to finish breaking in a new engine.  Ran the car for about 45 minutes and shop didn'teven charge me for the full hour.  Checked HP and exhaust gas analyser.  

I found another shop that gave me three runs for $100.  Car is down on power by 20%. Current motor has about 100 race hours on it. Time to rebuild!

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Truck and trailer loaded up. Car is ready to go.  Hopeing for a great Saturday in Sebring.   Car is looking great and team is ready for some fun hopefully in the sun.  Looks like rain but it should be a great weekend.  Hitting the road soon.  

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2 hours ago, turbogrill said:

Did some muffler work, the previous exhaust was nice but too loud. 

 

The end muffler was pretty tiny, trying with a dynamax. A little heavier but I rather be slow than deaf.

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ummmmm.....

 

ear plugs??????

 

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47 minutes ago, atxe30 said:

 

ummmmm.....

 

ear plugs??????

 

 

Without earplugs it's way too loud. Tried a stilo helmet with earplugs, still to loud.

 

I am the only one in the team complaining, are you guys deaf???

 

That sad my right ear has some issues from past, maybe that is what it is.

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9 minutes ago, enginerd said:

Just fired up the race car after making some changes and I can confirm, the problem which kept the BMW out of the Road America race has been resolved! Look out GBU, we're coming for you in April!

Glad to hear you found about 200hp and another 12 gallons of fuel hiding in there....oh, hope you have space in the shop for the 12 sets of tires it will take......🤣

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13 hours ago, wvumtnbkr said:

I absolutely hate loud r acecars.  

 

The constant noise just makes you tired and not as aware as you could be.

 

Mine is barely louder than the stock car it came out of....

 

We stacked a pair of Vibrant mufflers on the new car because it was too loud and no one wants to listen to a loud VQ.

 

Now it's less noisy at idle than my street car hahaha.

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14 hours ago, enginerd said:

Just fired up the race car after making some changes and I can confirm, the problem which kept the BMW out of the Road America race has been resolved! Look out GBU, we're coming for you in April!

Any chance you can share your issues with the K swap?  I had contemplated this swap to add some reliability and serviceability to our engine package. The old M20 is not cheap to maintain and or rebuild as you know I’m sure.

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3 minutes ago, TimS said:

Any chance you can share your issues with the K swap?  I had contemplated this swap to add some reliability and serviceability to our engine package. The old M20 is not cheap to maintain and or rebuild as you know I’m sure.

Send me a PM... we have had many issues.

 

This specific issue was an inadequate block off plate / seal. The back of the head has an array of passages which deal with: heater coolant, EGR circuit, coolant return, and some kind of (what I think is) intake air warming circuit.

The stock piece that goes there doesn’t fit (and we didn’t want to keep all these things functional) so we blocked it off with a simplified piece of our own. After removing and reinstalling this plate onto engine #3, I didn’t get it sealed quite right and coolant was seeping through into the intake manifold.

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