551 A race oddity

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551 A race oddity

Post by BigBobPilot » Mon Aug 26, 2019 4:41 pm

Race 3 completed. Water temp rock solid, the smoking reduced as the race went on. Not a great result, but I wasn't last.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by barry_bryan » Mon Aug 26, 2019 8:11 pm

Nice one Ben well done top marks. Baz


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551 A race oddity

Post by BigBobPilot » Mon Aug 26, 2019 10:55 pm

Well, that was a harder weekend at Brands Hatch than it should have been. I’m used to going racing & not having issues, but I’ve had to work though things this time. At least the multiple races has given me some time to try out solutions to the niggles. Apologies for not responding to the intrest on the thread, on Sunday evening I was busy being sociable, on Monday, I was just busy. Here’s an overview:

Sunday qualification, 20 mins (start 16:24) - I did 7 laps then came in due to high water temperature. I fixed a weeping radiator hose, re-filled & checked water was getting to the highest point of the engine. I also made some tweaks to the cooling ducts to help split the air better at the divider between the I/C & the radiator, I knew my aluminium material thickness was not an ideal flow separator and I came prepared to make modifications. On the right is the ducting as it was, on the left is my radiused edge, to try to prevent the I/C (upper portion) robbing all the air from the radiator (lower).The oil cooler is the section on the left of the photo.
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Monday race 1, 15 mins (Start 09:39) – I did 9 laps. The temperature was good initially, but it was cooler earlier in the morning. Then the temperature jumped quite suddenly, so I eased of & pitted. It had chucked some water out the header tank & overflow.

After checking the water levels on Sunday evening, I did think I might have the header tank too low. So I set about moving it higher. It was a bit lashed up & I couldn’t get the bonnet pin in on the drivers side rear corner, so it was zip-tied down on the suggestion of Richard Carter, as it was a rush to get out for race 2.

Monday race 2, 15 mins (start 12:15) – The initial race was red-flagged due to an incident. It was re-started and I did 1 lap, before there was a “pooofff” on the pit straight as it spat the silicone pipe off the inlet manifold as I applied throttle. The annoying things were: 1. I couldn’t drive it back to the pits as the MAF sensor is on the turbo inlet, after the air filter; 2. I had noticed the silicone pipe was at a jaunty angle, but didn’t have time to sort it as our start time was pulled forward & I was still trying to re-connect the header tank when I got the call to the assembly area. However, I could stand in the shade under a tree until the end of the race. I will be replacing the annoying clamps with fat jubilee clips.

Monday race 3, 15 mins (start 16:12) – I was 50/50 on whether to start the 3rd race, as I’d been burning engine oil, it was smoking out the exhaust, which I'm thinking is a failed turbo seal. I did check the compressor turbine & couldn’t feel any play, so I assumed the bearings were ok & the turbo wasn’t about to spit it’s guts. I also thought there was a risk of being black flagged. However, I decided to go for it so I could see whether moving the header tank had helped the water going over temperature. My supposition was that the head of water was not consistent enough, it was getting air in the top of the engine , causing it to puke water out, then the temp sensor was reading steam temperature rather than water temperature. This could also have been affecting the water feed to the turbo, as that comes from the back of the manifold – could it have been the cause of turbo seal failure? I finished the race, & the water temp was rock-solid , the max recorded was 100°C, so that was good. My race result was pretty poor, 3rd from last. However, I had no expectations at all, I just wanted to see where the car was. Also I don’t think I got the most out of it, I spent the whole race constantly looking at the gauges, the exhaust smoke & listening for alien noises. I’ve been round Brand Hatch quicker in the Marcos I share with Iain Daniels, but I’ve been racing that since 2009 & have confidence in it. I was kind of seeing where the SS1 was at, where I could lean on, it, where I couldn’t, what would the tyres do etc. So ultimately, I was pleased to finish, not be last & have a little dice with a couple of cars. I've got a long way to go to be competive, but I chose quite a tough series', to paraphase JFK, "not because it's easy, but because it's hard".

At Brands Hatch, the air temp peaked at 32°C, track temp at 37°C and that surely tested my car. The temperatures on the dyno were all good, when I tested at Donnington, it poured with rain so it wasn’t an issue & at my first Curbourough shake-down, I guess I didn’t do enough constant running. The water temp did get a little high at my Donnington qually 2 weeks ago, so it had given me an indication of a potential issue, but hopefully I know the fix, I’ll have to sort out a different header tank as it was all a bit temporary, but it did the job today.

Here’s the car in the paddock after race 3 (on the batterd side again) with the drivers side rear of the bonnet visibly higher.
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I’ll sort out video & pics of the car on track when I can over the next day or two.

I’ve not got an entry for Cadwell next weekend, as it has been prioritised for Championship runners. So my next outing is at Thruxton with the |CSCC on 21st Sept. The main fix for there is getting the turbo sorted.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by BigBobPilot » Mon Aug 26, 2019 11:40 pm

Sunday qualifying

https://www.davidstallardphotography.co ... /i-QpzCXdJ

There are a number of photos to scroll through there


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by BigBobPilot » Tue Aug 27, 2019 2:32 pm

Some photos from Monday's race 3, the links take you to photos of my car, but you can scroll through the rest of the photos if you feel so inclined:

Exhaust smoke visible:

https://www.davidstallardphotography.co ... /i-28csfqH

https://www.davidstallardphotography.co ... /i-Ftvz7Cb


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by BigBobPilot » Tue Aug 27, 2019 9:35 pm

Here's an edit of the racein-car video. I've put in the start, the windscreen is chipped just after the first corner (paddock hill bend), after I get swamped being a little tenative.

I got a bit stuck behind the white Escort, where I wasn't commited enough on the brakes. Once I was passed, I went a bit quicker, but I'd lost the pack.

At 2:20, I out-braked myself, but the car behaved itself quite well & I recovered ok, apart from grabbing 5th instead of 3rd.

I've shown the lead 3 cars lapping me, to show the speed difference. The planned next engine with more power is definitley going to be needed!



Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by Dcrosby13 » Tue Aug 27, 2019 11:05 pm

What engine are you going for?


I break stuff...... :w

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551 A race oddity

Post by BigBobPilot » Wed Aug 28, 2019 8:10 am

Dcrosby13 wrote:
Tue Aug 27, 2019 11:05 pm
What engine are you going for?
Just another CA18DET, I have it waiting in the wings. It will be modified to stable more ponies.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by Dcrosby13 » Fri Aug 30, 2019 7:16 pm

Cool, we are in the process of building a forged DET, just struggling to find a good crank


I break stuff...... :w

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551 A race oddity

Post by MikeyBikey » Sat Aug 31, 2019 9:14 pm

That video is great.


Is we sideways yet...

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551 A race oddity

Post by BigBobPilot » Wed Sep 04, 2019 9:05 pm

Despite my troubled weekend at Brands Hatch, I did have some interest & questions in the paddock including a couple of interviews, which you don't know if will be used anywhere. However, one was with the Autosport journalist covering the meeting. Today a piece is in Motorsport News under the, "Racing News" section (p.9).

Here you go:
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Note that I didn't claim to be a marque specialist!


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

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551 A race oddity

Post by Old and Slow » Wed Sep 04, 2019 9:08 pm

Poetic licence!!
It reads very well - let's hope there's more to follow.


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551 A race oddity

Post by CNHSS1 » Wed Sep 04, 2019 10:54 pm

Great work mate 8)
Good article


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551 A race oddity

Post by Benc » Thu Sep 05, 2019 8:40 am

Well done I am enjoying following your exploits.

Do you have any more events planned this year?



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551 A race oddity

Post by Roger Pennington » Thu Sep 05, 2019 4:56 pm

Well done, Ben. This project has come a long way, and it's good to see it starting to succeed. I look forward to reading about it's further progress! :D


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