Buggy Tire combo

[louisb]

What do you guys think of this tire combo? The rears are 31" I think which may be hard to do with stock gearing, 4.12 and a 1914. I am trying to decide if I want to go with a more off road look or stick with the 225R70-15s which are 27" tall for the Manx. My main concern with the rear tire size is being able to drive it at freeway speeds.



Thanks,

--louis

[TexasTom]

Cool setup!
The buggy's probably light enough to get away with it on the street. Don't know about with the trailer aty highway speeds though ... what cam are ya runnin?

[louisb]

That's not mine and I wont be pulling a trailer. (Though I wish I had one.) The cam I picked is some where between a w-110 and w-120. (Web cam 163)

I am guessing the engine will be somewhere around 100 - 110 HP maybe.

Edit: I could go with a 4.37 R&P instead of the 4.12 maybe. Tranny goes to be rebuilt week after next so I am trying to decide what to do.

--louis

[Tony M]

Looks too cool right now. I would not change tires, but i like the off road look.  Nice buggy.

[louisb]

Here are some specs:

4.12 w/ .89 4th @ 65

27" tire = 2966 rpm
30" tire = 2669 rpm

4.37 w/ .89 4th @ 65

27' = 3146 rpm
30" = 2831 rpm


MPH & RPM Vs Gears (4.12 x 3.80, 2.08, 1.31, 0.89 w/30" Tire )

RPM	1	2	3	4
1000	5.5	10.0	15.8	23.3
1500	8.2	15.0	23.7	35.0
2000	10.9	19.9	31.7	46.6
2500	13.6	24.9	39.6	58.3
3000	16.4	29.9	47.5	69.9
3500	19.1	34.9	55.4	81.6
4000	21.8	39.9	63.3	93.2
4500	24.6	44.9	71.2	104.9
5000	27.3	49.9	79.2	116.5
5500 redline	30.0	54.8	87.1	128.2

MPH & RPM Vs Gears (4.38 x 3.80, 2.08, 1.31, 0.89 w/30" Tire )

RPM	1	2	3	4
1000	5.1	9.4	14.9	21.9
1500	7.7	14.1	22.3	32.9
2000	10.3	18.8	29.8	43.8
2500	12.8	23.4	37.2	54.8
3000	15.4	28.1	44.7	65.8
3500	18.0	32.8	52.1	76.7
4000	20.5	37.5	59.6	87.7
4500	23.1	42.2	67.0	98.6
5000	25.7	46.9	74.5	109.6
5500 redline	28.2	51.6	81.9	120.6

Looking at the charts I am thinking it might be better to go with the 4.38 if I go with a 30" tire. My concern is will the motor be able to go up a grade in 4th at highway speeds, how peppy will this combo be around town and will it pull at least 65 in 4th. The rpms @ 65 do not look that bad.

Thanks,

--louis

[TexasTom]

4.12 w 1.48/1.04 3rd & 4th! 

[louisb]

4.12 w 1.48/1.04 3rd & 4th! 

lol, that would do the trick. But I am trying to stick with stock gears to keep the cost down. I can use either a 4.12 or a 4.38 with no cost difference. Other tranny mods will be a wleded 3 & 4 and a super dif.

--louis

[TexasTom]

If you stick with the 31s on the rear, I'd be tempted to go with the 4.375 r&p.

On the other hand, how much does that thing weigh, 1200 lbs.?

[Jim Ratto]

I like the T bucket look on Manxs

big wide squarish tires on the rear and 145's up front.

[louisb]

I like the T bucket look on Manxs

big wide squarish tires on the rear and 145's up front.

That is more of a pro street look. I like those too, just not what I want to do with this buggy. Now go look at the gearing chart I posted above and give me your thoughts on that. 

--louis

[Lee.C]

you know my thoughts dude 

- 165/80's up front (stock vw so the speedo is right)
and
- 225/70's out the back (good acceleration and good rpm and good highway driving)

BUT remember keep the pressures LOW otherwise you have a buggy that drive like a bag of CR&P!!!!!!

 

[louisb]

Yeah I should probably just KISS and quit getting off on tangents. This buggy is already headed way over budget.

--louis

[Lee.C]

see I do talk some sence - only sometimes 

Plus 31" tires is ALOT of rubber/weight to be turning - it will take it's toll on the trans/motor

[Bryan67]

I think those look like crap. I like the original Manx look of street tires on wide white steelies and hubcaps. Those modern off road tires are way too big and knobby looking. And shoudl`nt this be in the off topic forum?

[Rennsurfer]

Anyway, moving forward...

Louis, to answer your question really depends on what terrain you plan on driving your car on. If you're going off-roading... great. Leave it alone. But if you're going to be driving mostly paved streets, I'd switch those out for some street tires. It's your car... long as you're happy with it.

[louisb]

Thanks for the input form everyone. I have decided to go back to my original plan and run 165R15s front and 225/70R15s rear.

Thanks,

--louis

[Rennsurfer]

Thanks for the input form everyone. I have decided to go back to my original plan and run 165R15s front and 225/70R15s rear.

Thanks,

--louis

Cool! Please post a pic or two when you're done, Louis.

[Lee.C]

Thanks for the input form everyone. I have decided to go back to my original plan and run 165R15s front and 225/70R15s rear.

Thanks,

--louis

 

[Neil Davies]

I'm going for 145 XZX's and 26" Phoenix slicks on Flat Four BRMs...

[Lee.C]

I'm going for 145 XZX's and 26" Phoenix slicks on Flat Four BRMs...

 

[chopperdentist]

I'm going for 145 XZX's and 26" Phoenix slicks on Flat Four BRMs...

Interesting 


Louis, with a street tire set you can run easy off-rod too.

[Jim Ratto]

I wouldn't want the howling and gowling of those knobby off road tires.

[Bryan67]

Heres a shot of NOS Meyers Manx before I sold it. (I still regret having to do that). 3 1/2 and 6 1/2 Centerlines with 165`s and 235/60`s. I was actually going tun 145`s and 205/70`s but was going to Cal look it with a dropped front end. Anyway, it was a good fit with these tires and wheels. Man, just looking up this picture on The Samba hurts me...

[Rennsurfer]

Louis, with a street tire set you can run easy off-rod too.

Yep, long as you're not planning to hit the sand, mud, or soft stuff... you'll be fine with some part time off-roading.

I wouldn't want the howling and gowling of those knobby off road tires.

True, that.

[ugly duckling]

hey louis. dont know if you ever seen my little burro. i like the bigger tires and so does HOMER. GO BIG . the VEIW is better. UD .

[Rennsurfer]

Cool vehicle and dig the painted hubcaps.

[Lee.C]

hey louis. dont know if you ever seen my little burro. i like the bigger tires and so does HOMER. GO BIG . the VEIW is better. UD .

I just love your little burro UD - I have a really cool pic somewhere of a friend who had 2 of them BOTH old skool racers!!!!

What wheelbase are they? it looks shorter than a manx 

[Neil Davies]

Heres a shot of NOS Meyers Manx before I sold it. (I still regret having to do that). 3 1/2 and 6 1/2 Centerlines with 165`s and 235/60`s. I was actually going tun 145`s and 205/70`s but was going to Cal look it with a dropped front end. Anyway, it was a good fit with these tires and wheels. Man, just looking up this picture on The Samba hurts me...

That is awesome. Cage and an IDA motor and that would be ideal.

[louisb]

Heres a shot of NOS Meyers Manx before I sold it. (I still regret having to do that). 3 1/2 and 6 1/2 Centerlines with 165`s and 235/60`s. I was actually going tun 145`s and 205/70`s but was going to Cal look it with a dropped front end. Anyway, it was a good fit with these tires and wheels. Man, just looking up this picture on The Samba hurts me...

Yeah I agree it would be a shame to sell that one. Looksl ike it would have been a very nice ride when done.

hey louis. dont know if you ever seen my little burro. i like the bigger tires and so does HOMER. GO BIG . the VEIW is better. UD .

Hey UD. That is cool ride. You have one of your 3 liters in it yet?

--louis

[ugly duckling]

some day when i get some spare time  .  74x101 is my plan. its wight is 1280lb no driver . good luck with yours. buggys are a fun outlet for sure .UD .