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Old 07-19-2021, 01:49 PM   #276
Sgt.Gator
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Originally Posted by RyanC View Post
What kind of tire was that, a Pirelli slick?
Glad to see the damage was only to the wiring! Although, I did cringe looking at the extent of the damage, that would be a real biatch to repair if you weren't dong a full on replacement.
Those Stoptech calipers are monstrous. I upgrade to the smaller Essex Racing AP kit this season and have been very happy with them, although I was surprised at how small the actual caliper is. Pads are huge, but the caliper itself quite a bit smaller than even the stock Brembos.
Hoosier race slicks. Not the A7/R7, the real thing.

The Stoptechs were installed by the original owner, Dirty Rice Racing. I installed the AP Racing setup on my LGT race car. I MUCH prefer the AP setup, but I can't justify making the switch. Except now AP/Essex offers the caliper with the quick change pad clips, which is fantastic for endurance race events. Changing the pads on the StopTechs in the hot pits is not easy or fast.
The AP quick change clips are sweet!


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Old 07-21-2021, 02:57 PM   #277
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Default 818R Action Photos from May PIR Enduro Race

My helmet is just above the rear hoop because I didn't notice when we pulled the driver seat out to work on the fuel tank it didn't get put back in the same tilt bolt hole in the base. The stewards decided not to black flag me, but did meet me at my paddock space after the race about it!







The Radical SR3 is almost always the overall winner in our Enduro race.
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Old 07-22-2021, 01:23 PM   #278
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The Radical SR3 is almost always the overall winner in our Enduro race.
Well it was also developed to be a racecar and not a kit car, so that isn't a surprise.

They had very different goals at the start of their designs.
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Old 07-23-2021, 01:12 AM   #279
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The Blue Sake Bomber is back on track. Arcflash did an outstandingly quick job on the wire repair. We have put off the LINK ECU till November.

I'm heading up to ORP on Friday to instruct for Star Projects the day before the 24hours of Lemons race. My intent is to use the BSB for my part of the lead -follow exercise with my students. It should serve well for a test to be sure it's ready for competition.
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Old 07-23-2021, 01:06 PM   #280
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Well it was also developed to be a racecar and not a kit car, so that isn't a surprise.

They had very different goals at the start of their designs.
Yeah I was lucky enough to get to experience one of the earlier ones. If you get a 818 even close to keeping up with one that would be a massively impressive task.

I need to look into those AP brakes more, always disliked that Brembo only offered larger fronts.
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Old 07-24-2021, 09:22 PM   #281
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I was at Watkins Glen for Factory Five's first NASA race with the 818 mule. It was much less than 400 HP.
John George ran away from everything in the feature race until the weak five speed broke.

I have custom engineered Stoptech Trophy brakes for my 818R. Huge brakes!
I wish someone would buy what I have. I guess I need to promote it and all I've put into my R kit.
I just ran my STI at Thompson Raceway Park, in CT. I had no help. Not loading, unloading, tire changes, etc. I ran competitive lap times. My 50+ hour, 470 HP engine, kept humming, up to 8K.
I'm just getting too old to do all I'm doing and keep building more cars, engines or finishing my 818.
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Old 07-26-2021, 07:59 AM   #282
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That 818 has been in the works for a while. Come on Glyn, get the 'low maintenance' car done already
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Old 08-10-2021, 11:42 AM   #283
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Next race is this weekend at Portland International Raceway. I'll be racing in the ST class on Saturday and Sunday. I'm forgoing the Mini Enduro. It's forecast to be 109 degrees on Thursday, hopefully a lot cooler by Sat/Sun. It will be another good test of our cooling setup.
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Old 09-03-2021, 02:51 PM   #284
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One of my friends has done a video narration of a race at Pacific in the SCCA T4 class. Three cars are 86 platform FRS's (but you can imagine they are BRZs.). I raced against these same three guys years ago in Honda Challenge, now they are trying to convince me to switch to the BRZ. The driver is a multi year class champion so it's worth listening to his narration of what he is thinking, and what he thinks his competitors are thinking, thru the race. I learned a couple of good tips on the track.
Hope you enjoy it.

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Old 09-14-2021, 01:40 AM   #285
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Default One last mod to the dry sump system

We made one last mod to the dry sump system, an A.R.E. Spintric. It separates the entrained air from the oil before the oil goes thru the cooler, sending the air to the top of the DS tank.


To test the new mod I went to ORP for a full day of stress testing the STI for the upcoming Cascade Festival of Endurance on Oct 16. After long periods on the track I would check the DS tank, no signs of air in the oil. And coolant temps were remarkably low, looking at my AP datalogs showed the highest coolant temp was 203 degrees for three seconds, 201 degrees for 35 seconds, and at all other times under 200!
The trans temp stayed under 200.
And to show how hard it was being tested the only problem that came up was the rear diff temp hit 275 degrees during the last session! ORP is especially demanding on the diffs because of all the turns and lack of long straights for a cool down. I don't expect the diff temp to be an issue in October at PIR, but we will be adding a pump and cooler to the rear diff over the winter.
Next up is dyno time for final race tunes, then one more trip to ORP for testing.
Good work Arcflash!
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Old 09-14-2021, 09:36 AM   #286
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So does your pump lack a centrifugal AOS, or is your oil tank not doing a sufficient job or de-aerating the oil? I know several tanks on the market are pretty damn lazy designs just because they have a big name and most racers don't know any better.
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Old 09-14-2021, 10:58 AM   #287
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So does your pump lack a centrifugal AOS, or is your oil tank not doing a sufficient job or de-aerating the oil? I know several tanks on the market are pretty damn lazy designs just because they have a big name and most racers don't know any better.
The pump has no centrifugal AOS. The tank is a Peterson and has the centrifugal design, but it wasn't enough.
At PRI Gary is going to be showing a new tank that has the Spintric built into it. That will be a great design for anyone starting from scratch.
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Old 09-15-2021, 10:37 AM   #288
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Ah. On the WEC/IMSA side we ran Daily with AOS and had great results.

On the NASCAR side (no BOP), we designed the de-aeration to be passive and in the tank.

But there will always be another gadget people can make to sell to racers.
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Old 09-15-2021, 11:41 AM   #289
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Originally Posted by Sgt.Gator View Post
The pump has no centrifugal AOS. The tank is a Peterson and has the centrifugal design, but it wasn't enough.
How did you know that air was being entrained and/or causing a problem?
How do you know that the Spintric did the trick? I'm interested in how you evaluated the problem.
I remember that another 818 racer added a Spintric or similar device.
Since my son will be taking over the completion of the 818R and it will have a Dailey DS (along with Micah's destroker kit in the engine) I want to get him off on the right foot!
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Old 09-15-2021, 01:24 PM   #290
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How did you know that air was being entrained and/or causing a problem?
How do you know that the Spintric did the trick? I'm interested in how you evaluated the problem.
I remember that another 818 racer added a Spintric or similar device.
Since my son will be taking over the completion of the 818R and it will have a Dailey DS (along with Micah's destroker kit in the engine) I want to get him off on the right foot!
It's easy. While cold look inside the DS tank and note the color of the oil. The level is not as important as long as there is at least 1/3 of tank! The oil level will be low simply because the tank is higher than the engine and will gravity flow into the engine. That's why Cosworth in their install instructions wants you to spin the scavenge pump before you start the engine. I don't do that and so far it's been no problem.

Start engine, warm up to operating temp. Stop engine and take the cap off the DS tank, look down inside at the oil level or measure it with a dip stick.

Go out on track and run it hard for 10 laps. Come back in the pit and stop the engine, look inside the tank or measure with dip stick. If the level is significantly higher than before that isn't just the oil expanding thermally, there is air in it. You may note the color is lighter too. There will be bubbles on top. You may even see foam.

After I installed the Spintric all those things were significantly reduced.

And yes, Rob runs a Spintric on his 818 he bought from Chad who originally installed it. Now that he has added a third scavenge stage he is having great oil temp/pressure results too.
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