157 replies to this topic

[MAXR]

In what way? Oval? The edges will be rounded off, so it won’t look so Lego Bricky.

[smiley]

I think chris means either 45 degree isch forward or rearward start.

The flat way it starts now looks a bit off in my opinion.

 

The total flow looks good in my book,

But what do you think yourself?

 

 

[chris_uk]

what are you going to use the duct for? 

 

my initial thought was make it like an inverted NACA duct so the air flowing over the top is sucked in with minimal drag, the mclaren f1 is kind of a half way house. 

 

[MAXR]

Cheers Chris.

[MAXR]

A couple of hours spare today after a long 3 hour dog walk. What a lush day!

Not a lot to show for it though, just the offside rear quarter. But, I have made the templates, which can be used for the opposite side. A nice easy job for tomorrow. Hopefully, the entire back end surfaces should be finished. I may pull her out to walk around to find any issues or awkward lines.



https://photos.app.g...YgqtA5b78e7umV8

[Arno]

Could look at a setup like this to break up the 'channel' a little..

 

 

 

 

Idea behind it described https://forums.seloc...d=379995&page=1 there.. (it long, so grab a cuppa..)

 

Basically the smaller front section of roof duct is used to create a venturi effect in the bigger scoop on the roll-bar cover so it starts pulling in more air than would naturally flow into it and also limits the amount of hot(ter) air from the radiators being channeled into the engine bay. (in this case the intercooler)

 

Visually it also turns the long 'slug' of the roof channel into 2 separate sections.

 

Worked well as far as I can tell..

 

Bye, Arno.

[MAXR]

Could look at a setup like this to break up the 'channel' a little..






Idea behind it described https://forums.seloc...d=379995&page=1 there.. (it long, so grab a cuppa..)

Basically the smaller front section of roof duct is used to create a venturi effect in the bigger scoop on the roll-bar cover so it starts pulling in more air than would naturally flow into it and also limits the amount of hot(ter) air from the radiators being channeled into the engine bay. (in this case the intercooler)

Visually it also turns the long 'slug' of the roof channel into 2 separate sections.

Worked well as far as I can tell..

Bye, Arno.

I think I am going to shelf the roof vent. The several I tried looked pretty ugly. I know that It would have been blended onto the roof and the corners rounded off, but it would still look ugly.

But, I have a cunning plan! I will purchase a suitable Nacca style roof vent like the Mac F1 car posted by Chris a few posts ago. But instead of having an external route over the roof, I will bring it under the roof near the windscreen and build an enclosed 30mm deep by 150mm wide internal rectangular pipe that will just fit above my roll cage Centrally and go into the engine bay over the roll hoop of the roll cage and into the engine bay. I looks doable and would retain a clean line with no wind turbulence or additional Surface area etc.

What do you think?

[MAXR]

I spent the day scratching my head. The rear wasn’t quite right and I had to redo a lot of bits again. You probably won’t even be able to see the changes. 😂

Firstly, the rear bumper wasn’t blending into the old rear wings as good as they could have. And, I wanted to be able to make the rear less Audi like.

I really wanted to make front and rear bumpers separate and not as full clams, so that replacements from damage would be easyto replace as well as making removal easier.

As for the duck tail rear, Holy sh1t, they are difficult to make look right. I wanted a noticeable tail in the middle, not a continuous lip. Then there was blending them back onto the rear haunches of the VX clam and making the curvatures and lines flow.

I had to change the crease line on the top of the rear wings to curve back to the ducktail, as I think it will look more cohesive.

I’ll post a few Additional photos later.


https://photos.app.g...RNmSYujBJZuyT59

[MAXR]

https://photos.app.g...VUbNNVJgKjH59E9

[Arno]

But, I have a cunning plan! I will purchase a suitable Nacca style roof vent like the Mac F1 car posted by Chris a few posts ago. But instead of having an external route over the roof, I will bring it under the roof near the windscreen and build an enclosed 30mm deep by 150mm wide internal rectangular pipe that will just fit above my roll cage Centrally and go into the engine bay over the roll hoop of the roll cage and into the engine bay. I looks doable and would retain a clean line with no wind turbulence or additional Surface area etc.

What do you think?

 

 

Well positioned NACA duct could work to draw in air.

 

Only issue that could keep it's effectiveness down is if the airflow over the area is too turbulent or not attached to the surface so there's a low pressure area. In such conditions a NACA duct won't be able to do much except be a pretty shaped holed in the bodywork

 

If you make sure to be able to vent the engine bay/boot out the back of the car then it should at least be able to generate low(er) pressure in the engine bay and draw in air via any opening (roof, side scoops, undertray NACA ducts) it can.

 

To test all that I guess you'd need to make a scale model of your car and stick it in a small windtunnel

 

Bye, Arno.

[MAXR]

Outside walk around.

Just remember, all the pvc panels are fitted temporarily as I need access to various areas first.

The roof air intake will not be used.

The doors are literally duct taped to the car, so gaps will look awful. Ditto for the majority of the car! 😂

https://photos.app.g...1UxjatXZLToebk9

[MAXR]

Well, I spend more time redoing work rather than just getting on with it.

Anyway, the rear, although nice, didn’t really work as well as it could and was bugging me. So, I’ve revised the lower half of the bumper. I personally love it now. But, feel free to be honest and say it as it is.



https://photos.app.g...rHTRB4PVvREPoK8

[smiley]

I like it.

Would suggest to take a whack at a custom CF diffuser to match the outlines.

 

[MAXR]

Yeah, I’ve just posted that on FB. I’ll add fins to the red diffuser and have it ramped from the main undertray. That will save weight too!

[chris_uk]

max, why dont you make a blown diffuser?-

[MAXR]

My first day back on the 220R and it turned out to be a good one.

Firstly, I was waiting for some bits to arrive today, and both were scheduled for delivery after 1pm today. So, I decided to rip out most of what was left of my dashboard to try and make the interior a little more bespoke than it was prior to this work.

So I know I have enough on my plate, but I wanted the interior just a little different. I am intending on fitting new switchgear, possible new cowl for the speedo/rev counter and also a new steering cowl. Plus a new windscreen defrost air vents and electric blower, possible slim console for major control buttons or roof mounted with a steering wheel starter button.

All parts are likely to be CF skinned and probably altered from a donor car. The main dash will be alcantara covered. Door cards CF with simple release handle.

I also have decided on modifying the wheel arches. Not to make them wider, just more modern.

One of the deliveries was for some side silk extensions. They will need a little modification, but will fit in and make the sides a little more modern.

Finally, the rear Ferrari 430 Scuderia diffuser arrived. I knew it would fit as I have one and was able to measure and check. I did have to alter the Toyota red rear diffuser too. A little heat enabled me to change the angle of it to fit where I wanted it to.

I didn’t purchase the fins for the diffuser as they are too big and I’m making my own fins using 8mm floatex. Then the entire diffuser and fins will be made in CF.

The exhaust has just been placed and needs lifting.

I have to say, the diffuser fits really well and although I will have to change the main central bulge under the exhaust, to be shallower (an easy modification), it will fit perfectly under and does clear all suspension etc to meet up with a new flat undertray or in fact the old one. It also has a nice flowing shape. I know the angle of the diffuser is critical, so I will make my best man guess! 😂

New lower corners will need to be created and formed, a job for tomorrow.

https://photos.app.g...r3Rqhgb4MYzQco7

[Code Monkey]

Not seen so many comments on it, but i like the dashboard option, looks a lot simpler.

Is there any weight saving with a GARW dash tablet instead of the standard dials?

[FLD]

I'm loving this.  I can't comment more than that as I'm too excited to see it done. 

[MAXR]

Not seen so many comments on it, but i like the dashboard option, looks a lot simpler.
Is there any weight saving with a GARW dash tablet instead of the standard dials?

The speedo binnacle is held on with completely over engineered (read super heavy) brackets. I’ve just pulled the loom out through the large Gromit. I’ll weight them but I suspect it would weigh 2kgs of metal I’ve removed excluding the dash top. I really like the sparse open space, it makes the interior feel more roomy.

I may buy a AIM Motorsport MXG 1.2 Strada IVA (7” Colour TFT Display) As I guess the old one will look a little dated now. I will probably buy new switchgear and a donor car’s cowls for the speedo and steering column. Then CF Skin them.

[MAXR]

Quick update on diffuser. Hopefully I will have it fitted later.

https://photos.app.g...fv7WVoR5bE13o69