Drag radial question?

[daytona kid]

Drag street radial question?

I want a huge tire on my car and am making allowances for that, but my question is- can they be too big for my power. I had a RR drag car with slicks that were a tad to big and made it bog off the line. Can I put more psi in a steet legal drag radial to help it spin more or something that will keep a big tire from grabbing to hard? Or do you think 525 hp will be enough to not bog with a 325 x 60x 15 street/drag radial? Or can you get harder/slipperier compounds?

 

[Mr B Body]

You probably have about the same power as the 440 we had in my brother's RR (393 RWHP) and he ran the same size drag radial (in Mickey ET streets), with a 3.91 gear it would easily spin them at the start. I would think that if that engine bogs, it is a carb adjustment problem. My 2 cents.

 

[HEMI-ITIS]

They can be as large as you prefer.If it's a bracket car it doesn't matter as long as it hooks & books.
I've been seeing a lot of cool cars getting it done on 8 & 10 inch tires,,,,,heads up!!

 

[SUPERSTOCKRACER]

Try a 30 x 9 radial slick by hoosier.
use 19 psi and hang on.
For the record my 65 dodge runs a 29.5 x10.5 non W hoosier and I hook all day.It makes 1245 hp.

But what do I know,I'm slow :icon_rolleyes:

 

[67 B-body]

I don't think smaller spinning tires is the answer to having hard acceleration....
If you pick up performance by doing that, it's one of two things..... The tire spin gives a false sense of increased power, or your placing the engine into a RPM area that is generating higher torque levels, or HP levels......
Sounds to me like you could use more converter...... Keep the large dia. tires to get a long footprint and gear accordingly.

 

[daytona kid]

I guess I should be more precise about what I want. I have room for a 12" tire and would like to go with that (for looks) if I can without bogging with a 525 hp motor.

 

[SUPERSTOCKRACER]

I guess I should be more precise about what I want. I have room for a 12" tire and would like to go with that (for looks) if I can without bogging with a 525 hp motor.

than go with a M/T 29.5 X 10.5W slick. I use to run it on my 65 hemi belvedere.

 

[Herr_Poopschitz]

If you are concerned w/ ET, use the smallest tire you can hook, which at your power level, depending on gearing/converter, could be fairly small. Big tires take energy to translate and rotate, energy that could be used more efficiently to propel the car forward. Nothing is worse, IMO, than a big tire, slow car.

Are you concerned about hooking on the street or only the track? Are you competing in a DR class? Why the focus on radials?

As some others have noted, 'bog' relates to the tune...not sure in what context you mean the tires are causing it.

 

[67 B-body]

My Hoosiers 28" X 10" on Weld wheels weigh less than my Subaru tire... LOL!

 

[daytona kid]

I will be driving on the street rarely, but not racing on the street. I will be racing on the strip and it appears to achieve what I want I may have to get a set of tires and wheels for the street (12" for looks) and a set for the strip (10" or whatever works best). And I assumed radials were the tires to have now.

 

[SUPERSTOCKRACER]

I will be driving on the street rarely, but not racing on the street. I will be racing on the strip and it appears to achieve what I want I may have to get a set of tires and wheels for the street (12" for looks) and a set for the strip (10" or whatever works best). And I assumed radials were the tires to have now.

Radials are over rated imo.

 

[67 B-body]

Radials are over rated imo.

Was that picture with my 8" converter?

 

[Herr_Poopschitz]

My Hoosiers 28" X 10" on Weld wheels weigh less than my Subaru tire... LOL!

I won't argue that the Subie tires are better, but when choosing a wheel/tire combo, 'weight' is not the only variable...everyone on the internet seems to forget about moment of inertia. It could be the case that the tires on your car 'weigh' less, yet still take more energy to move.

 

[67 B-body]

Hoosiers


Trying to find you a picture of how mine fit in the quarters... This is what I can find quickly.....

 

[Cornpatch MO]

Listen to the guys that tell you-you have a tuneing problem--most likely the carb. What rear gear ratio?....................................MO

 

[SUPERSTOCKRACER]

was that picture with my 8" converter?

yes sir.