Aerodynamics roadster bodies.

[kiwi belly tank]

Johns 34 roadster is absolutely outstanding the only thing I would change is the front tires. Running Goodyear 2904 top fuel front tires in front would reduce greatly the aero drag. Thus adding to the MPH without adding any more horsepower.
   Ronnieroadster

Sid.

[deepindebt]

I wonder how these tires would affect handling,if at all? I agree and have thought about those for our roadster also. Anybody have experience running these?

[ronnieroadster]

That's the tire I run on the front of my Ford flathead powered gas burning REMR. They handle fine the only concern is the load capacity per tire which is 800 pounds each. Top speed so far running the tire on the salt 219 on a runway 229.
 Ronnieroadster

[SPARKY]

I have them on the frt of my Lakester  ---remember they mount on motorcycle rims

[Stan Back]

Our relatively light for its class C/STR had 1400 on the front and 2200 on the back -- with a driver.  That's close to the maximum listed. 

[Rex Schimmer]

As Sparky said, they do need the motorcycle bead configuration to mount properly. I just got a set of forged aluminum wheels, with the motorcycle bead, for the front of our lakester. They are very nice, I got them from Wally Kohler, he is building a new motorcycle and got me a set at the same time. They are 17 x 2.75 which is .5 inches wider than standard top fuel wheels. I have several friends that are running them on a lakester (230+MPH) and also a fuel roadster with a GMC six. They are made in China but are damn nice. This is a link to them:
https://www.alibaba.com/product-detail/Motorcycle-Aluminum-Blank-Wheels-Aluminium-Motorcycle_1600468363793.html?spm=a2700.7724857.normal_offer.d_title.24467e50QJqHWj&s=p
They come with a .75 inch center so Wally had them cut the to .50 inch which is better for both of our applications.

Rex

[ronnieroadster]

The Top Fuel 2904 front tire dose not need a motorcycle bead I have them on Centerline Spindle mount wheels.
 Ronnieroadster

[Stainless1]

Ronnie, your centerlines are probably made with a motorcycle bead if they were made for the dragster tires... The LSR 17 inch skinnys have a motorcycle bead I believe.

[SPARKY]

Absolutely  go to an earlier thread  when Podunk and I were making mine  even management of Goodyear and Centerline didn't know at that time. gave us WRONG INFORMATION!

[WOODY@DDLLC]

Same tars - 'mo $$!

[Stan Back]

I kinda wonder if you're running those 800-lb. limit on the front of a Street Roadster or an (Altered) Roadster and it decided to come around as some of them do, how those tires would react with almost two tons trying to peel them off the wheels.

On another note (hmmmmm), we switched from the Goodyears to the M&H ribbed ones and at last had a good feel of what was happening (Notch exempted).

[salt27]

Just looked it up, the Goodyear 2904, 22x4-17 has a 1200 lb rating at 90 psi.

[bearingburner]

I remember reading a long time ago that a '27 T body  was more streamlined if you ran it trunk first

[Dynoroom]

I remember reading a long time ago that a '27 T body  was more streamlined if you ran it trunk first

Which is why the SCTA rule book now say the body must be run in a "conventional manner" in Vintage Category.

[Rex Schimmer]

When aero roadsters are the subject I always like to bring up the Contrivance Engineering 23 T (might be at 25??) roadster. It does (did?) hold almost all of the modified roadster records between AA and E, blown, unblown, gas or fuel. I remember talking to the guy that designed it, can't remember his name right now, but he likes the early T body as you can control the air flow around the rear tires. Hard to argue with success. His thinking might work for the roadster class also.

Rex