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gaining ground clearance.

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masracingtd1167:
I just measured mine and they are 99  3/4 roll out at 5lbs !

wideopen231:
Not exact but quick math tells me its 32 tall at 99.25. That would give me 1/2" more clearance.

 Bill.
Are you getting better wheel speed control with M-H/ If memory serves you tried M/T's and did have much luck with them. I Know Frank Parks don't like the M/T's. If mine don't work out I might give M-H's a try.  Looks like they are about same weight as 15x32x14 Mickeys I have now. I would need new wheels but 2" less wheel would be weight savings in 2 ways/The wheels and pocketbook. LOL

As for front ground clearance I am actually not bad .Problem is at mid plate. Front has about 3.4 at nose.Mid plate is about 1 to 1.5" lower than planned.Tire is part and chassis builder gets blame for rest of it. But to his credit its first dragster chassis he has built from ground up.LOL

 I could change upright and plate all in one and keep wheelbase at 225 and motor at 50" out. I think added welding in same area would actually weaken car. Loosing a 1" in those numbers probably very little effect. I think the extra 1" clearance would allow for more tire choices. If the 33's work I would have 1.5 more and be around 4" at motor plate. Another upside would be easier to get jack under car,but the old guy who does all the work is bound and determined to have a set of pro jacks or knockoffs that he built.

JrFuel Hayden:
The easy way is taller front and rear tires , One of our JF teams has a John Worm chassis that also had a clearance issue , motor sits low in the chassis, like the pan is 5-6" below the lower frame rail. He now runs 33x10.5x15 MT , but I think the MH 33x12x15 would work better [ 101" roll-out] and he runs Hayden 18" front wheels , 250x18[ 23.75" ]tall rib tires, I also have 275x18 [ 24.25" tall] and 300x18 [25"] tall] . I don't like the look of the 300x18, it's a tire I sell to "T" bucket wheels. Or you can change the angle of the rear end, like one of John Worm's guys did, and change the front axle.
Your combo might like the 33x12 MH, we have a few JF teams running them and some blown BBC and SBC guys . Or you could step-up more and run what the fast A/F guys do run the M/T bubba 16x16 tires , the fast guys are runnning in the 5's, on injected nitro and the fast blown alky are running 6.00's on the bubba's
Let me know if you want more help.
Jon 805-444-4489, cell   

wideopen231:
I plan on getting a set of wheels from Jon , but I don't plan on bigger ones. Since its so far from front axle to mid plate the 1/2" or so raise at axle centerline would be very little at mid plate. Help yes just very little. Bigger back tires would work better since only 50" to mid plate.Not sure about going to 2" bigger tire to get 1" plus  I feel is needed. That would add 6.28" to rollout. Probably need more gear,but since I don't have a base tune yet that may or may not be issue to consider. Which tire works best on back is big question. While I have a Hemi it is small by todays standard with only 482 cubes.I have to work towards smaller than standard bracket car tire. Oh so I thoink right nowmthen what the heck do I know,I built chassis to low to start with.LOL

 As always money is a consideration. With long list of pieces for car and trailer I have and the fact lottery folks keep pulling wrong number. I think cheapest route and probably best end result would be to simply lower rearend in chassis unless there is a negative effect I am not seeing. More work but almost zero cost.

masracingtd1167:
Sounds like you might be better off changing the chassis and that way you can use any tire you want !My 33inch M+H tire has only 99 3/4 roll out and I don't think that would help all that much !

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