26s or 28s? 6 speed s60 with 4.10s
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I was wondering everyones opinion on if I should run 26s or 28s with my 6 speed and 4.10s setup? I almost wanna say that 28s are gonna be too tall of a tire and its gonna be a turd down low, and Im unsure of running 26s since Im new to drag racing. Any help is appreciated
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A 26'' tire by-ply will grow to 27'' or so. You will be fine on the 26'' tire. I sprayed a 150 shot m6,4.11's and a 26'' tire and made it down the 1/4mi. My rev was at 7,200. I ran a 10.27 that day. n/a i run 10.62 at 130mpn and i cut 1.42 60 foots on the 26'' tire weight is 3,680lbs with me in it. This year i'm going to try a 27'' m&h racemaster slick.
Last edited by mike c.; 02-11-2011 at 05:14 PM.
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Yeah I have my rev limiter set at 6900, I really wasnt trying to go through the traps any higher then that. And eventually since I have a th400 thats gonna go in once I get my convertor so thats kinda why I was leaning towards a 28 inch tall tire.
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I was thinking about running the 28s just because Im gonna swap between the 6 speed and TH400 and I dont really wanna trap over 6900rpms running the 26s on the 6 speed setup. It would probably be real bad to have 26s on the car with the th400, and I planned on either running Hoosier drag radials or M/T drag radials since its still a street car, dont really wanna run a bias ply tire, I dont like the wishy washy feeling you get on the topend.
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we have a car that ran good with hoosier drag radials and thats what my setup came off of. User name is GrannySShifting, went 1.47 60ft and 10.82@126 weighing 3450lbs.
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I had a 6 spd/4.10s and it hit the rev limiter (7,000) at just under 130. I bought some 28 inch drag radials and it worked out better for me. I then went to 3.73s but it definately lost the ability to come out of a bog like it did. So I guess it depends on what you expect to trap.
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Im hoping to trap 122-123 mph or somewhere in that area. It seems that of guys running 4.10/4.11s are trapping in the 7-7200 rpm range. I'd like to be a little lower then that just a personal preference
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I have not chosen a drag setup yet ... I am waiting to find and mount a rearend first.
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Exactly what I did. 4.11s with the m6 and went to the th400. I'm only phone so I can't see your mods. But I was fine with bolt ons and 28s ran 6.9s consistently in the 8th with full weight...ish. I also went with a Hoosier drag radial...they are Awsome
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OP ... I am debating the very same options ... S60 with 4.10's (or 9" w/4.11's) and tire diameter. At 6,800, my top trap speed is calculated at 138 mph with 28's and 128 mph with 26's. With 4.56's, 28's would be 124 mph and 26's would be 115 mph. Since I am closer to a 1/8 mile track, I would spend more time running the 1/8 mile. I would like to occasionally run the 1/4 mile though.
With 4.10's, I have alot of room to run faster with 26's in the 1/8 mile and some room to run faster in the 1/4 mile on 28's. I would rather change tire OD's instead of gear ratios when I change tracks.
I have not yet considered the 4.30's, but those are my next calculations.
Also, bear in mind that this is trapping in 4th gear (1:1) ratio. You wouldn't want to shift to overdrive to finish any run.
I have not had this car down the track yet, but I have no idea what it will run/trap in the "660 ft"/"1320 ft" .... actual trap speeds may mess up my setup completely.
With 4.10's, I have alot of room to run faster with 26's in the 1/8 mile and some room to run faster in the 1/4 mile on 28's. I would rather change tire OD's instead of gear ratios when I change tracks.
I have not yet considered the 4.30's, but those are my next calculations.
Also, bear in mind that this is trapping in 4th gear (1:1) ratio. You wouldn't want to shift to overdrive to finish any run.
I have not had this car down the track yet, but I have no idea what it will run/trap in the "660 ft"/"1320 ft" .... actual trap speeds may mess up my setup completely.
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my buddy that I got this setup from was running 4.56s with the 275/60/15 hoosier drag radials and was trapping 126-127 at 7200 rpms in the 1/4 mile. Also Ive seen alot of guys say drag radials break **** but I really havent seen any problems with them and theyve seemed to work out for a few guys that I know, the car that I was referring too was leaving at 7500 rpm with a 6 speed and never broke anything. Im figuring running 28s just for future mods as well and eventually was gonna put 100 wet shot setup on it too.
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A 275/60/15 is a 28" tall tire and it seems to be right on my trap numbers with a 4.56 ... your buddy seemed to be trapping perfectly. I am thinking these breakages with dr's are mostly stock suspension/stock 10-bolt cars. The M6 cars you have not seen problems out of are 12-bolt/9"/S60 cars with adjustable TA's, relocated LCA's, SFC's and no wheel-hop ... correct??
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just hard to get 500whp 3750lb 6 speed cars to hook... on DR's.
but with 28's we both been well into the 1.4's and hook pretty consistantly.