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4th Gen NHRA Class Cars- 27" & 28" Fronts?

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Old 12-09-2009, 12:49 PM
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Default 4th Gen NHRA Class Cars- 27" & 28" Fronts?

With the rollout games the NHRA class cars play, I was told some of them will run a 27" or 28" tall front tire.

Do those even fit on a 4th Gen?

I have a 26" DS2 now, but would consider a 27" tire if it works to get a little more ground clearance.
Old 12-09-2009, 12:54 PM
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On my stocker I run a m/t 27.5 and it clears with no trimming of anything. Anything bigger than that will prolly need some trimming. Stocker guys trim the fenders and make it lool like they haven't been touched. I've seen some 29'' fronts on 4th gens.
Old 12-09-2009, 06:19 PM
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I also was thinking about switching to a 27" front runner for ground clearence. Does anyone have any pics of a 27" tire on a 4th gen f-bod.
Old 12-09-2009, 06:26 PM
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As soon as I put my 26's on I was wishing I woulda trusted my gut and gone 27.5's...............
Old 12-09-2009, 08:28 PM
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I run 28's on mine.

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Old 12-09-2009, 08:40 PM
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Here are some pics of my 27.5's

https://ls1tech.com/forums/drag-raci...most-done.html


If you want to see more you can go to autoimagery.com and type my name Tim Tosto in and see some more, or any stocker guys name they have great pics.
Old 12-09-2009, 09:12 PM
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Everybody I know run 27.5" or 28".
Old 12-09-2009, 09:36 PM
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what's the benefit of running the larger front tire? I have 26's up front now but will change them out if it's helpfull on the track.
Old 12-10-2009, 08:58 AM
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Originally Posted by tektrans
what's the benefit of running the larger front tire? I have 26's up front now but will change them out if it's helpfull on the track.
More roll-out at the starting line allows you to leave a touch earlier without going red.
Old 12-10-2009, 12:15 PM
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Originally Posted by Ed Wright
More roll-out at the starting line allows you to leave a touch earlier without going red.
it keeps the beam tripped a little longer? Is this what you mean?
Old 12-10-2009, 12:36 PM
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Originally Posted by custm2500
it keeps the beam tripped a little longer? Is this what you mean?
There ya go.
Old 12-10-2009, 01:55 PM
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Originally Posted by Ed Wright
More roll-out at the starting line allows you to leave a touch earlier without going red.
So in other words like you said you can leave a bit earlier before tripping the beam, a virtual "rolling start" in a way?
That would improve ET a bit as well right?
Old 12-10-2009, 05:04 PM
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exactly
Old 12-10-2009, 06:52 PM
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Learn something new EVERY day! Good stuff!!
Old 12-12-2009, 10:03 AM
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I run 28" MT Sportsmans. I originally wanted to keep my ABS to keep the car more streetable so I went the the same tire diameter as the rear to prevent ABS problems. Now I plan on removing the ABS so it's nice to know there is a benefit to these tires.
Old 12-12-2009, 11:14 AM
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It will take a bit to get used to, initially changing will result in your reaction times looking pretty bad, but once your used to it you should be faster, technicially

I thought about doing this one myself, not sure if the tires will fit with the drop spindles, but if I find the reduced ride height to be a problem, I have a way to get it back now.
Old 12-15-2009, 11:47 PM
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man that's some great info right there!! im going to run a 28 in tall in the back so a 27.5 on the front would be great!!
Old 12-18-2009, 06:14 AM
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I plan on upgrading my fronts to 27.5 as well!
Old 12-21-2009, 07:47 PM
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Originally Posted by JL ws-6
It will take a bit to get used to, initially changing will result in your reaction times looking pretty bad, but once your used to it you should be faster, technicially

I thought about doing this one myself, not sure if the tires will fit with the drop spindles, but if I find the reduced ride height to be a problem, I have a way to get it back now.

Nah, not that big a deal. You'll just be green a little more often.
Old 12-21-2009, 08:08 PM
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I'm good for a consistant .040 to .020 light on a good day, .400 pro tree. Not great, but it's o.k. for a guy that's on limited track time.

I'd have to definitely work on that some more, as I know the bigger tires generally will slow the reaction time if you don't adjust for them.

I just got the 1 inch drop spindles for the car, if I find they're too much of a drop, I'll put a 28 inch tire on the car and get the ride height back with that, and the bigger tire "advantage"




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