MGB Aerodynamics. Will this work?

[classic conversions]

It would be nice if it was that easy, just add a wing and be done.

If traction is the game then yes. there is a formula to figure out the down force area needed. Down force is like adding weight, so spring rate changes.
The front may also need down force to compensate for the rear down force. tires also a factor to include in the formula.
Then angle of the wing etc etc.

Wings create drag which means that they use hp/torque, top speed reduces.

It would be more beneficial to reduce drag first and add the needed down force.
I would start by closing every opening in the front, reduce the air intake on the radiator, be surprise how little you need.

Many books in this area. I am doing the same with my GT I want less drag,

[Jim Stabe]

Bill

Post up some pictures of what you are doing to the GT, I'm fabbing the front sheetmetal now so would be the ideal time to make changes. Start a new thread so we don't hijack.

[classic conversions]

Will do.

Minimizing the grill opening, closing all openings in the radiator support, smooth front valance, reduce the front bumper size and recessed in to the body, will see the possibility of minimizing the rain gutter in front of windshield it is a big air brake

May have to add spats to the front fenders, will determine when is done. The radiator does not need a big opening. I am closing the grill from inside the grill. The opening will be about 50% of the radiator at the grill and 100% at the radiator, funnel effect. I ma going back to woirk on it next week.

[classic conversions]

Will post when I complete the radiator opening.

One picture

[classic conversions]

Forgot to mention that the openings you see in the front balance will be close. You can also see the chin on the front balance, that lip will hold a small lip spoiler sticking out forward about 1". Once I get it running will use wool strings  to check the flow of air around the fenders, that will tell me what I should do.

chin spoiler is similar to the Z06 Vette

[Preform Resources]

From my understanding thru folks I have worked with  a typical opening to rad size  should be about 1" to 6" ratio, but like what has has been discussed previously you still need the pressure differential back of the rad to work.
Dave

[Todd McCreary]

it would take a bit of trial end error to get the spring rate right and I could use my Gopro camera too see what is going on. Also I could factor in adjustable stops to set maximum and minimum angle.
How stupid is this? as it seems just too simple.


Too simple?  Wait til it breaks, we'll see how simple you think it is then.  ;-]

you can get little rubber sliders for the shaft of the adjustment piston which will show you exactly how much maximum compression at speed is.  Obviously, that won't work for extension.

[roverman]

Mark, "If" you were to attach the rear wing struts to the rear end or uprights,(unsprung weight), you would not need more spring rate.Using rubber blocks to limit suspension compession, prematurely, can lead to rapid slide of the tires, on that end,(spring of near ifinite rate). I'm not suggesting this, but on early days of winged Indy cars, they did this. Problems arose because the verticals were "triangulated". One failed, there was a crash, and USAC banned suspension mounted wings.Its a good concept, the application was flawed. Footnote, so now high downforce cars can use springs fron the railroad/lol. Onward, roverman.

[v8bloke]

Well here is my idea built up and ready for testing.






Now need to do some testing.

Mark

[Preform Resources]

Mark, it looks great, excellent range of adjustment and you could change spring rate or motion ratios for further adjustment
capability, nice fab work by the way.
Dave

[BlownMGB-V8]

You may have a little rocking from side to side so watch for that. If it does, watch out for a harmonic. I think it is stiff enough that you will be OK. It looks pretty good. Not sure how your mechanism works though.

Jim

[v8bloke]

Here is the final design all fabricated and finished.

[v8bloke]

Sister car now has the same DRS system.

[v8bloke]

[v8bloke]

Stunning performance improvement. The Wing and drag reduction linkage works just great. knocked off 3 seconds from my best time at Castle Combe.

http://www.youtube.com/watch?v=YqNfmSKs9YU

[crashbash]

Man o man that's better than a roller coaster ride!  I would like the spectators perspective from the stands as well.....down the straights what do you think you top end speed is.140 mph?  Just a guess.

[Todd McCreary]

Hee hee.  This is why all circuit racing should start with the fields inverted by qualifying speed / points.

You're just murderizing them.  Looks like you're mostly just eating them up with motor down the straights though.  Are they still pretty much up to your speed in the corners?  Or are you just really taking it easy with the side by side stuff, due to this being practice and with amateurs?

I see you're still getting throttle loose even after the tires are warmed up.  You're definitely not short power.  Is there anyone out there who would be 'in your class' if this was a real race?  Were there cars close to your speed and you just never ran near them?

[v8bloke]

David, Yes top speed on this track must be aproaching 140mph! the speedo goes right off the scale (140) but havent a clue how accurate it is.
Todd, there were a few very fast cars there including  a Nissan GTR and a Honda powered Lotus Exige but we never seemed to get together on track.

Here is a clip of the new Home brewed DRS in action. I am so pleased that it works exactly as I intended.

http://www.youtube.com/watch?v=-uR8Lx33jEw

Cheers

Mark