Anyone done this? What size did you go? Would I be better off buying some 15 inch drag wheels? And will 15 inch wheels clear LS1 rear discs? Thanks

 

they make them for 16 inch rims now, but it kinda defeats the purpose of a wrinkle wall tire....better off to go with 15's
and get more sidewall

 

Well, or I could just get them 28 inches tall and have more sidewall than with a 26 inch tall 15.....

 

383, you have some serious part there. What does it run? Like seriously, every part you have is better than mine.

 

That it does but I happen to know a guy that pulls high 1.4s - low 1.5 60' times on a set of ET Streets on a set of gta rims. I think the size that he has are 28x10x16's. The funny thing is that he cuts them times using a 3.08 gear.. lol

Kat

 

thats because its a 28 inch tire....the majority of et streets you see will be of the 26 inch variety....the extra 2 inches makes up for the lack of sidewall with the 16 inch rim....

but go for a 28 on a 15 inch rim and your in even better shape.

 

it runs 12.30's so far....which sucks my ***, with a best short time of 1.66 seconds, and a best trap speed of 116mph

with that traction and MPH i should be solidyly into the 11's but its not....back to the drawing board i think.

I built everything with top notch parts, and it was expensive but it pays off.....i rarely ever break anything.

the car made 410hp at the wheels on the dyno, and it was only trapping 108mph at that time, so i picked up 8mph with some tuning and it was about 98 degrees and humid at the dyno, so its putting out some serious push....cant figure out why it wont run even with good traction, good mph and good crisp shifts

 

what sort of cam are you using? you can use all the top notch parts and if your cam doesnt match your head/intake combo it wont do you any good.

 

well that car cant be all that heavy, looks like air was eliminated, and the hood is probably glass. I would say no more than stock weight even with a cage and a 12 bolt. Sounds like it has quite a big cam. I'd guess 250 @ .050. So maybe it bogs after it get out of the hole? I dunno. Maybe you should convert it to fuel injection so you can really take advantage of those fully ported 210s. haha

 

going from 26" tall tires to 28" might slow ya down though... unless you're over-geared right now.

 

the cam is well matched, evidenced by how much power the motor makes....around 500 at the flywheel....

its 308 deg duration, 248 @.050..... .630/.630 lift

 

the car is heavy, it weighs about 3600 lbs with me in it, about 3400 without

it doenst bog at all

trust me, fuel injection is not the answer here lol....on the dyno graph my air/fuel curve is flatter than most EFI cars

 

in some cases that would hurt your ET but it would almost always push your trap speed up...unless your making now power at all

 

I was comparing the weight of your car in reference to mine, thus the not too heavy comment. It is all reference. Well, I hope it runs better for ya.

Back to the original question"

88iroc350, What part number are those tires? Judging by your comments on "modifying" the fenders, I take it the 11.5 size wouldnt fit?

 

I dunno the part number off my head they're just plain ol' 28x10.50x15 M/T ET DRAGS. The wideness of my tires wasn't what caused my fitment problems it was the height so MAYBE I could throw on an 11.50 tire if I got a thicker rim ...I never really bothered measuring. 'round my way anything bigger than a 10" tire and people are scared of ya.

4.5" backspacing on a 15x9 rim would likely work with an 11.50" tire without sticking out too far.

 

well, i was wondering b/c in jegs they state that the 10.5 inch tire has only a 8.5 inch (or about that) contact patch. Yours just look bigger in that picture.

 

i have 26x11.5x15's on 10" rim with 4" of backspace....they fit good....i think im going to go with a 28 next season though

oh and before i want trying to be rude or anything....i dont want to go with EFI cause its too expensive, and the carb is doing a very good job according the air fuel curves anyhow.....so it really wouldnt help me out too much

 

hey, any pics? Is efi really that much more money? I though those demons were pretty pricey?? Wow, I wish I had those AFR 210s!!

 

lol.....demons are pricey as far as carbs go.....a really good EFI setup from start to finish can easily cost as much as 3000 bucks....

you can get something decent complete for probably around 2000

 

heres a pic under the hood

 

heres a pic of the motor out of the car

 

what are you using for a fuel pump? how is it configured?

 

Unless you use a stock ecm like me. $220 injectors, $125 used LT1 manifold, etc. Not too expensive, really.

I was looking for pictures of the ET streets on the car, but thanks for the others.

 

unfortunately, an oem type efi setup would be pretty restrictive on a motor with a very large cam and heads that gets a bit of RPM at the track.....

heres a picture of the slicks...thanks *** i got a brand new trailer since this picture lol.

 

WOW those tires stick out pretty darn far compared to mine

 

Perfect pics guys!!! thanks

Hey, 88350, what is the backspacing on your rims? how does it compare to stock? do you happen to have a rear view pic? I was thinking that the 11.5s would curve in the center on an 8 inch rim. Did the tall tires touch the front of the fender or the top?

383, my restrictive intake did trap over 118. lol.

 

thats great man, im glad it works for you.....but my engine isnt your engine.

mickey thompson recommends a 10" rim for the 11.5" tire by the way....they stick out slightly because i bought a rim with reduced backspacing in order to clear the inner fenderwell, they dont stick out much though.....could have got the perfect backspace with a weld rim, but at 116 bucks each, im pretty happy with the rims i got

also what size is your cam and how big are your heads? cause that makes an enourmous difference, if the cam doesnt have alot of duration then its not going to be as large of a restriction. LT1 manifolds are not a huge restriction like a tpi setup is, but unmodified they arent the best flowing manifold known to man either....just because your trapping 118 mph doesnt mean theres no restriction, maybe you should be trapping 124mph....it would show up more in the higher RPM on the dyno, where the curve would start to fall off

i have 248 deg of duration at .050 and im hitting 6400 across the traps

Got a dyno sheet on that? or a timeslip?, id like to see how it breaks down

 

the stick out about 3/4" past the fender lip

but i dont really care if it looks dumb, because those are only on the car at the track, regular iroc rims and tires for the street for me

 

sorry double post

 

https://www.thirdgen.org/techbb2/sho...hreadid=207048

There above is what it runs. The cam is a 240 240 Hyd roller. Look at my sig and note the 9 inch, and the 1 5/8 shorties! Anyhow, the efi just allows it to make good average power as I doubt I would even get 400 at the wheels, unlike yours which I am sure would tops that easily. I do really think my single non mandrel 3 inch exhaust and crapo headers are holding it up tho. Maybe after some long tubes the intake will restrict, who knows? I do see some mid 120s on the miniram tho, which is similar to the LT1 intake. I do believe I am the fastest on the LT1 as of now so we will see. I am sure you will tune 5 more mph out of yours at least. It is always something simple!

Ohh, I called mickey thomson (330-928-9092) and they said that I could use one of their 28 X 11.5 et streets on the 8 inch rim. I just dont want to buy tires and realize I want more when my n2o kit goes on. So, I might just get the 11.5s. Choices choices. Still looking for a rear view pic.

 

My rims are 15x8 with 5.5" backspacing. The front of the wheel wells needed a good beating with a sledge hammer for them to fit. If I were to use 27" or 26" tall tires I wouldn't have needed to beat them in though.

Heres the only picture I have of the rear ...not the best.

 

pictures from the front down the side usually show a better view of how the rear tire sits, or along the side from the back....i dont have any though i'll try and get one....

in the past season i picked up around 10mph just from tuning over last season, so thats encouragine....it made 410hp at the wheels on the dyno before the season started so thats pretty good.

this winter i need to get some skinnies for the front and im switching to a solid roller cam, and a super victor intake....should be good for some serious extra power.

some day it will run 11's, *** knows it makes enough power.