551 A race oddity

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BigBobPilot
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551 A race oddity

Post by BigBobPilot » Sat Apr 06, 2019 2:58 pm

I had previously made an aluminium corner piece for the passenger door, where the exhaust comes through. However, last Sunday, I decided to re-make it all; I decided it was too ugly, too heavy & too complicated. I’ve made a simple plate, and they’ll be some heat shield material attached to the back of it to overlap with what’s mounted on the car already. I looks like a bit of a colander at the moment, but with countersunk rivets in place, it should look ok. I’ve got to prep & wrap the door before it’s fitted though.
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I also started looking at the ducting for the coolant radiator, intercooler & oli cooler. I have cardboard templates I made a while ago, a couple of pieces had been transferred to 1mm ali sheet, so I set about fitting & adjusting, but then stopped, as I realised I needed to set-up the splitter height better, & I needed the air intake on the nose to aim for.

So I dug out the mould I made ages ago. This all turned out to be a nightmare, as I didn't leave the paint on the buck for long enough, and everything reacted and gave me a finish is not great. I’d tried to repair & flat it back & got it to a state that I think is satisfactory, if not great. In the week I polished up the main mould, & marked out some ply for the return edge on the bottom.
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This morning I’ve cut out the ply made some bracing to keep it all flat, polished the ply, filled the small gap between the mould & the ply to get a good corner & hopefully I’ll get some GRP work done over the rest of the weekend.
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In the mean-time, I started setting up the front-end to continue with the ducting. First off, a couple of piece of box section butted up under the chassis & the radiator frame (which is at the same height as the chassis) this represents the height of the chassis, which will be flat floored at some point. It also gives me the bottom face of the front splitter.
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Next another piece of ply which is the same thickness as my splitter should end up.
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Then a bit of marking out from the nose, which I then over-checked with the air-damn mould & some measurements.
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I then took my previously made parts & started blocking up bits to the right height, I’m going to have to make some adjustments, but to avoid re-work, I’ll get the air damn moulded first.
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Ben

SS1 CA18DET race car in build
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 swoakes » Sat Apr 06, 2019 3:04 pm

Looking good Ben; very impressive work :wink:


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551 A race oddity

Post by b.c.flat hat » Sat Apr 06, 2019 5:14 pm

Cor blimey Ben, yoom a bit of a twinkle-fingers wi' body-work😜😁



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551 A race oddity

Post by CNHSS1 » Sat Apr 06, 2019 6:58 pm

Nice work mate, cant wait to see the laid up nose fitted, super cool! 8) 8)


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551 A race oddity

Post by BigBobPilot » Sat Apr 06, 2019 9:36 pm

b.c.flat hat wrote:
Sat Apr 06, 2019 5:14 pm
Cor blimey Ben, yoom a bit of a twinkle-fingers wi' body-work😜😁
Hmm, I'm not sure about that...


Ben

SS1 CA18DET race car in build
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 » Sat Apr 06, 2019 10:02 pm

The air damn mould has had gel coat, woven fibre glass tape along the return edge on the bottom, some loose strand sprinkled in the sharp corners and a layer of CSM, with a couple of strategic bits doubled up / patched over. I think it will have to wait for a second layer, as I ordered some bond-in nut plates, which have not arrived yet, I should have paid the extra £1 - something for next day delivery, when I ordered GRP supplies on Weds evening, never mind...
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I need to check with the main nose to see where I could put some foam core in to stiffen the air damn too.

As the intake ducting needs the new moulding to work to, I diverted to the intercooler outlet ducting. Cut a hole in the bonnet, then block it off again!
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It's just the top piece of the I/C duct, that is oversized , so I can cut & form it to match the bonnet.
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The I/C top mount double up as mounts for the upper duct too. The duct has slotted holes, so it can be pulled out without taking the bolts right out. I won't be using the massive penny washers, but I didn't have any washers the right size for now. I'm hoping I can form the panel upwards to form the gurney flaps around the front & sides of the outlet, the bonnet aperture may need opening up a tad to fit around them. We'll see.

The bottom face will come up the the back edge of the aperture, with a seal to the bonnet, to hopefully give a smooth exit. The photo below gives the idae, but it needs a bit of re-shaping, as it's a bit abrupt at the moment.
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It will all unbolt fairly quickly & easily for access to the engine & front dampers etc.


Ben

SS1 CA18DET race car in build
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 » Sun Apr 07, 2019 9:59 pm

Some days, you're busy and you see masses of progress. Today was not one of those. I was busy all day, but have little to show for it.

I did break out the router again, along with curcular saw & jigsaw for a little wood work. Not in the style of Morgan though, just some simple formers in 3/4" ply to form ali sheet around.

I had lots of measuring & assembly / dis-assembly & marking etc. Photos to follow when it all looks like something.


Ben

SS1 CA18DET race car in build
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 » Sat Apr 13, 2019 10:55 pm

Something a bit more visual for this update. The front air damn had some more matting. The bond-in nuts, I got were exactly what I ordered, but not what I was expecting, so I left those out. I’ve not put any foam core in, I thought I’d see how it fairs, then I can reinforce it if/where required. It popped out the mould really easily, which was good after all the hassle getting the mould off the buck.
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A quick wash to get the mould wax off, there was a bit of release agent on the bottom return edge & along the top of the part. Then line it up on the car to see what it looks like. It's not got the best finish, but it will flat back ok & I will paint it.
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After some measuring up, a last look at the standard shape nose
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Then the bottom of the nose is no more
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The new air damn is now all trimmed back. It's doubled up where it fits on the forward facing bonnet pins.
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The plan is to bolt this to the upper nose section, with a finisher strip on the edge. The nose is going to be susceptible to damage, so I want it to be easy to remove & repair. It will be quicker than glassing it all together too.

The 2-piece affair gives me a unique opportunity continuing the cooling ducting.
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I’ve got brake cooling intakes to cut in too. I’ve just bought spun aluminium parts for these, so that should be relatively simple. The engine intake will be cut in to the air damn too, with some sort of bell mouth, either bought or made.


Ben

SS1 CA18DET race car in build
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 reliant-reviver » Sun Apr 14, 2019 6:57 am

Now you're in a bigger work space with it you can make everything wider and bits stick out further!

Tis going to look ace when it's finished.


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551 A race oddity

Post by b.c.flat hat » Sun Apr 14, 2019 8:19 am

Alright, I admit it, yer got me mystified. I thought it prudent t' streamline fer less air resistance an' aerolift at front. What's gooin' on wi' brick wall? Or is this a complete rouse an' you'll turn up wi' a nose as sharp as paint?

Crusty the Confused.



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551 A race oddity

Post by BigBobPilot » Sun Apr 14, 2019 9:32 am

Hi Crusty,
The standard nose has an undercut, which will generate lift. Some older cars used to go light at the front end at high speed, in part due to this.

The bluff front has the same frontal area, but just removes the under cut and hopefully therefore reduce the lift. The low height & the splitter will then reduce the anount of air that gets underneath. The remainder goes over the top, round the sides, or through the cooling ducts. Well, that's thw plan.


Ben

SS1 CA18DET race car in build
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 » Sun Apr 14, 2019 9:06 pm

Amongst some other jobs on the car today, I hung some decoration on the workshop wall
20190414_131252.jpg
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Ben

SS1 CA18DET race car in build
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 CNHSS1 » Mon Apr 15, 2019 2:38 pm

Ya big tart Gough :lol: :lol:


Racing is life, everything before and after, is just waiting--Steve McQueen
6 time Class Champ, 2006 & 2014 SSSC Champion

RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
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551 A race oddity

Post by BigBobPilot » Mon Apr 15, 2019 5:03 pm

CNHSS1 wrote:
Mon Apr 15, 2019 2:38 pm
Ya big tart Gough :lol: :lol:
Ah well!


Ben

SS1 CA18DET race car in build
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 b.c.flat hat » Mon Apr 15, 2019 10:00 pm

Nearly quarter past one an' the wall still ain't painted!😜



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