330hp_91RS

Ok for those of you with 26 inch tall tires in the front and 28 inchers in the back, what effect does the extra inch of radius have on weight transfer???

Is it significant???

What is the easiest way to lower the rear 1 inch to compensate???

Can rear coils be cut????

I'm about to go with that tire combo for traction, D/R's, and want to know if i should just go with 26 inch tall all the way around. I know the 28's in the back look meaner though.

330hp_91RS

Nobody has anything to say??? I know a lot of you have the raked stance and a tire combo similiar to the one I am talking about.

If it had no effect just say so.

MrDude_1

i havent noticed any suspension problems relating to it.... or atleast LCA alignment...


i cant say if it had a effect or not though... every time i put big tires on back they're sticky for the strip... usually ET streets..
other then using a hypertech or laptop to re-adjust the shift points all my 4thgen friends that do that havent had problems...

330hp_91RS

Well, I'm like the look of taller, fatter meats out back, that's one reason why I am doing it. Plus the fact that I am going with Drag Radials, and the Taller sidewall can produce a bit more grip.

I'll have a full suspension setup, so I just wanted to make sure that I wasn't de-optimizing the setup.

You know?

MrDude_1

as long as the suspension angles are correct, you're fine.

88IROC350TPI

I have 26" tall tires in front and 28" slicks in the back... In my sig picture the car appears to be sitting higher in the back but in reality it doesn't look like that (driveway slants down in that picture)... I have 28" tall tires simply because I need 28" tall tires, not to make the car look "mean" or have a funky stance. Heres a crappy picture of it on flat ground... sits almost level.

330hp_91RS

I was waiting for you to post. I was actually thinking of your car when I posted this.

In reality you don't "need" a 28 inch tall tire. Unless the extra inch of radius affects your drivetrain/gears and all that much.

You could have basically gotten the same amount of traction with a 26 inch tall tire. Which means you'd have the same size all the way around.

I just wanted to know if the extra 1 inch on the tire radius was going to affect the suspension geometry at all. apparently it is not noticable, so now I have to figure out what looks the best.

I like the way your car sits, don't you? I bet you wouldn't change those 28 inch meats for 26 inch ones.

I want to stick some 28 inch tall tires on the car, and lower the car inch only in the rear to correct any, if there is any, suspension geometry changes. Plus it would look mean as hell with the tire tucked like that, you know what I mean, they do it on musclecars all the time.

Thanks for the reply. Glad you posted.

Peace, Matt

Timz2882

iTrader: (1)

i got 26'' tires up front and 27.something in the rear. and with my suspention, i think its too high. im actually goin to lower my car eventually and change rims and tires when i change my motor set up. but heres a non-photoshop of my car and then im goin to post a photoshopped pic of my car with it lowered but ill be making the car level and be sittin on 17's when i change my motor and/or exuast routing. but if you want like highspeed cornerin with the 26''/28'' set up for your car find a tire with stiff side walls but if its mainly for like stright line stuff then the drag radials will work good.

Timz2882

iTrader: (1)

heres a photoshopped pic of what id liek my car too look like but its not possible with my exuast right now, matter later it will look like this

88IROC350TPI

Yes, 26" tall tires are fine on my car NA but on nitrous I'll run outta gear. The extra 2-3 inches (remember tire growth) put the car back where it should be in the powerband / safety zone. Plus, like you said, the taller tire makes more contact with the pavement and since it has more sidewall it'll bite better off the line. I need all the traction I can get since I'm dead set on running insane times with completely stock suspension ...I gotta see how far it'll take me

Rembrandt

part of the traction increase comes from the slightly heightened center of gravity, since it is higher relative to the ground there is more weight transfer.

Slush92RS

iTrader: (6)

Mine actually sits level with the above mentioned combo. The picture may fool you but the cul-de-sac is bubbled up in the center making it look not level.

zupmanZ28

i run a 26" tire right now, but will most likely be moving up to a 28 with the N20. NA i run through the traps at about 5200 in 4th, so i'll prolly be floating pretty good going though the traps.

You have 3.23 gears right now right? If so, i'd hold off on the 28's until you get some more gear under there.

Eric

330hp_91RS

I'm not going to get 26 inch tall tires now so I can buy new ones after I get 3.73's just to be a little bit faster for a short time.

I'll do the rear soon anyway.

The car isn't even going to get 1-2k per year on it. The drag radials should still be good/have tread on em' after 1k.

zupmanZ28

i had no idea when you were planning to do the gears, thats why i said that. To me, a set of DR's last about 4k before i can't drive them on the street anymore, so basically assuming the car isn't broken for any length of time i go through 2 sets a year, and i don't even drive the thing in December, January or February.

Eric

Kingtal0n

I keep 28" Tires on the back simply for two reasons. Footprint, and gear reduction. the bigger footprint helps LOADS on the street, and the gear reduction to bring my 2.73s to 2.42's (heh) until I get 3.42's

88IROC350TPI

So why on earth would you prefer 2.42 over 2.73?

330hp_91RS

That doesn't make sense if you are then going to go to 3.42's.

Are you going to run a 31 inch tire with the 3.42's or what??? LOL!!!!

88IROC350TPI

Technically, the more I think about it the less it makes sense to me... More tire height = more traction BUT little do people realize, less gear = worse traction. Now, to some that sounds kinda silly and it is... Yes, it would be easier to begin losing traction with, lets say, 4.10 gears compared to 2.77 gears BUT its *much* harder to RECOVER with the 2.77's. Once you break traction with a gear like 2.77's their surface speed jump much faster than a numerically higher gear would, thus making it harder to regain the traction you just lost.

Kingtal0n

Oh, I dont, I hate it.

Its just those are the tires I bought, so that when i Put in my 3.42's it doesnt scream down the highway.