BlackScreaminMachine

iTrader: (17)

Nice one, isn't it time for you to get to work.

25thhawk

iTrader: (3)

My 2 concerns for not wanting to use a 28 in tire are: 1) dont want to bend cut up the rear fenders and 2) putting a 4.56 gear in would be fine until I pt stock size tires on for driving on the street. Not even sure I would want the 4.30's for that.
My car already has all off the suspension parts in it, adj shocks, air bag, lca's, torque arm, drag bar, etc. The rear and tires are the last parts I need, hopefully.
Is there a reason the 26's dont work well. I realize the contact patch is a little smaller and the sidewall is shorter. But with 4.30s the gearing would be the same as a 28" 4.56 combo. And it seems like guys put a ton of power down with that combo.

JL ws-6

iTrader: (50)

The sidewall of a 26 doesn't have the ability to plant as well as a 26, also due to the smaller sidewall, the contact patch won't grow as much as it will with a 28.

The 26 you will also have to run more air in to stop the sidewall from collapsing and the rim hitting the track/tire carcass, again preventing the tire from planting as well... and due to the added air, the tire will be mroe "springy", and will bounce back up more after the initial hit.

As for the clearance issue, it's the inner fender in the bottom front that will need to be beat in a little, the fender lip itself won't be a problem, bumper cover, in the back where it "wraps in" around the tire, will have to be trimmed away a little.. not that bad.

28x9 m/t tire will clear almost with NO work at all, and a 27x11.5 hoosier qtp also clears, again with little to no work at all. Either of those would be better then a strait 26 inch tire.

Also, fwiw with 4.56's and a stock sized tire you will still be able to go 75 and be under 3000 rpm on the highway... it's not that bad.

BS, I don't leave until 2 to go to work......

25thhawk

iTrader: (3)

Thanks, I can definitely understand what you are saying. I don't know if it really fits into my goals for the car, but I understand how it would work better. I guess the 27" hoosier is worth checking out. It is a dot tire correct? Is the sidewall stiff enough? that was the reason I was thinking the et drag, because I could get the stiff version.

25thhawk

iTrader: (3)

FWIW, i have no plans to take this car any further than an 11.50 et. Don't want to put a roll bar in it. Once this car is done I plan to start on a drag only build, just looking to enjoy racing this car more. Mainly I need to get the car into the 1.60-1.70 60 ft range and be more consistent. Because dr's suck on my car

starbucks

Quote de starbucks
I'm not exactly sure why every one seems to be afraid to gear their car up with an m6? What you want is a first gear final ratio of around 13.1. You can find this out by multiplying your first gear ratio by your ring and pinion ratio, for example 2.66 (1st gear) x 4.86'( rear gear) = 12.92 first gear final ratio. This is what some old time who used to run stock eliminator in NHRA in the 60s told me and it has worked for me. I do run a 28 inch slick and turn 6800' rpm though.
6800 rpm isn't doable for some of us with stock springs and pushrods haha.. Most people don't do it to keep their car more streetable though..

Yeah I would say your right about 6800 rpm and stock springs.

25thhawk

iTrader: (3)

Ive got ported heads on it, so not worried about the springs. It is a 98 so I am more concerned about the rod bearings. I could up the rev limit if I miscalculate things, but definitely trying not to do that. 4.86 on the street definitely not for me though.

25thhawk

iTrader: (3)

I looked at both the 28x9 et drag and the hoosier qtp 27x11.50. Neither of these tires have the stiff sidewall version like the et drag's. Do you think that this would be a problem, especially given the weight of my car?

JL ws-6

iTrader: (50)

If you put a tube in them, no I don't think it would be a problem. If you do tube them make sure you screw the tires to the rim so they don't move, and tear the tube.

I've run the 27x11.5 qtp on my car when it was full weight, around 3700 lbs... it wasn't that bad. I had good luck with them at about 14 psi, anything less then that and the car didn't 60 foot any better.

28x9 we've run on a few cars, ad same deal, about 14 psi seems to be a good place for them.

I didn't have tubes in the qtp's, car with the 28x9 did have tubes, and both were capable of low 1.5 60 foots with somewhat limited power, in the 430 rwhp range, and both cars were in the 3700 lb range.

25thhawk

iTrader: (3)

How many passes did you get out of each? Did either one last significantly longer? I guess I could try them without a tube and then put one in if it doesn't work. The main thing is that I don't want to get the wrong gear in my rearend. Seems like with any of those choices, a 4.30 or 4.56 would work well. I'm leaning toward the 4.30 because I street drive it alot more than I race it.

JL ws-6

iTrader: (50)

4.30 should be fine.

I would say about 50 passes on either set and they're done. Don't drive on either, the heat cycles will harden them up and they won't work for **** (like all tires for that matter)

Put tubes in them too, and screw them to the rim... that would be the best bet IMO.

SlickVert

iTrader: (5)

Don't worry about street driving with a 4.56.
With the 6 speed in 6th gear and a 26" tire you will only be at about 1900 at 70 mph.
I had 4.11 then 4.56, I street drove both and all I can say is the 4.56 gear with a 26" street tire was the best mod I ever did for street drive fun!
Car will feel like a 9 sec Hotrod.
More seat of pants acceleration then H/C felt.
Bob