Tire Question

Hi Guys,

My combo:
TD with 526 hemi, 1471 Littlefield HH @ 26%, 26 degrees initial timing, 3.89 rear gear, with PowerGlide (converter locks up at 4900).

I've been using the GY 3199 (36 x 17 x 16).

My issue is if I try to put more power to the tire it shakes the car to death (currently pulling power away by retarding timing - 15 degrees initially ramping it back in over 2.5 seconds) . The best I can do is a 1.05 sixty, when I get more aggressive it starts to go BS.

I've gone 6.20 @ 230 with a 1.05 sixty with the above tune up but that's it.

I've been told I should try the Hoosier 34.5 x 17 x 16 tire. If so, which compound?

Any suggestions would be greatly appreciated.

Thanks in advance.
Frank

 

Hoosier tire

D2055 I think this is what your asking for same tire I run just diff combo. Hardly ever got shake unless track wasnt there.........Jerry Hunt

 

Tires

Thanks Jerry.

Any particular part # that is better then the other one?
I see a 18780 and a 18790 in the C2055, can't find the D2055 on the web page.

Looks like the section width is different.

Also, I should have mentioned this is with beadlocks not liners.

Thanks again.

 

This is with beadlocks I will double check but pretty sure thats it.....Jerry

 

How are you launching the car? Likely the tire shake is due to under power at that particular point with no tire slippage.

Blessings for the New Year...........Ron Clevenger.

 

you might want to try the Mickey Thompsons with bead locks they have a stiffer side wall
i dont know many that can run bead locks and NOT shake

 

Tires

Ron,

I've tried several different launch RPM's (from 2200 to 3800). The more power I put to it the more it goes crazy, with less power it at least leaves without shaking or trying to break the wheelie bar.

Also, FYI, this is with a 1.80 gear set in the trans.

 

tire shake

i've seen my share of tire shake - until i starting using stiff wall m/t tires - somehow it went away with no other changes. i do use beadlocks - start air pressure at 5 lbs hot. i run a bruno 1.81 3 speed lenco even though i've been told its too much 1st gear. i also run a 3.89 rear gear. in 2010 i'm going to try a 1.57 1st gear 2 speed bruno/lenco with the mickeys but its also a new motor combination was well. with the 3 speed it hardly ever used 3rd gear in the 1/8th. m/t makes different sizes 36" + 37"- for blowers use the 36". also they make different side walls for converters and clutches - make sure you use the correct application. andy b.

 

shake at the hit= under powered, the tire should slip. We want about 1 turn of slip, I run almost the same as you do the only thing that is different is I run 36deg at the hit and pull timing out down the track and I run a 4.10 gear my 60 foots have been in the hight 80's to 90's Dave
www.myspace.com/daveloweswr

 

Tires

Thanks for the replies guys.

Dave,
That's why I'm thinking on changing tire types. I guess I can't spin the GY 36's.
I know when I try to hit it harder the shake gets ALOT worst.

On one pass I tried only taking out 10 degrees (instead of 15) at the hit and left at 3400 (instead of 2500). It broke just about everything on the car (all 6 torque converter bolts, throttle cable, mag base hold down, brake caliper mounting plates, etc) and I was only on the throttle for .76 seconds before lifting.

Let me ask this; should I look into changing the trans gear set (1.80) to a 1.65?

Thanks again.
Frank

 

Is this a dragster or a funny car chassis. I used to have the same problem on the 36" tires (funny chassis, BBC Glide 4.33 gear ratio) but I raised my launch rpm to 4000 and set the wheelie bar about 2" off the ground when pulling up on it. I haven't had any problems since. But a also have a 7500 stall converter.

 

i run the hoosier 34.5 with killer 60' but would but shook leaving and i would drive through it but hard to drive BUT when my tach quit working i knew i didnt want to leave at a lower rpm so i made sure the rpms were higher to my surprise no tire shake with the the tach working i would leave at least 4800 rpm so now i try and leave at 5200to 5500 roots blower beadlocks clutch

 

shake

Whats up with the 4900 lock up? I sure wouldn't worry about tires. I run almost the same with a Kebelco @ 32 over. And 452 cu in At a divisional event leaving @ 2100 with 36" Goodyears + 14 deg. timing @ the hit it gets up on the tire. It's a Powerglide also. I think I would be looking in different areas, but that is just me. Good luck, and spend that hard earned money wisely. Don

 

Shake/Tires

The 4900 was what was built for me by TS. They told me I needed to be between 4600 and 5200 so I think they hit it. NOT saying it is where I need to be, just saying that's what THEY said I needed.

So should I look at the converter instead of tires and trans gear ratios?

The races I attend are NHRA D1 TD races so the track prep is OK.

I just feel I should be able to put a little more power down, I would think I would be able to do better then a 1.05 sixty (most are between 1.07 and 1.10).

Thanks
Frank

 

Frank, check your PM's...............Blessings.........Ron Clevenger.

 

Check your PM's - sent you a old post on gear ratio

 

Tires

Thanks guys.
It's very much appreciated.


Frank

 

With a 4900 stall are you trying to cross at 6000? I'm new to this game but that seems to low. It will also mess with Your fuel setup (probably burping rich) at full throttle the pump is at speed but the converter is holding the motor to 4900. JMHO
Steve

 

Hoosier versus Good Year - Tall Tire/Tall Gear???

Wanting to get opinions!!! What is best for a blown alcohol dragster (pinchhead motor) 389 gear...Hoosier versus Good Year....110 rollout versus 114 roll out...Tall gear = taller tire etc.??? What about Mickey Thompsons??? Just curious and appreciate any replies...Thanks