Short slicks for 150 HP?

[rodgersbadassbus64]

M&H Racemaster Drag Race Slicks

Tire, Drag Slick, 23.00 x 7.50-15

I'm building a bug truck with a 2180 and pro street rancho 3.88 transmission.... I'm hoping for 13s maybe break into the high-12s someday... compared to 26x6x15s.
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Like some other respectable members, "why buy what you can build"

[vwracerdave]

Little more details on the 2180. It could have 120 HP or 180 HP.

What 3 & 4 gears are in the transaxle.

1/8 or 1/4 mile.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK

[madmike]

Hey Rodger, seen ur project,cool, I use that same short slicks for the 1/8 mile strips
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[rodgersbadassbus64]

Things are progressing nicely. I've ben compiling all my parts for my new motor....2180,42x37 vw 040 heads 38 cc, fk89, with valve pockets should be 11.5 compression. New china carbs came today 48 ida clones....$480 delivered...

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Like some other respectable members, "why buy what you can build"

[Nightshift]

Hosier will work the best. Choose your compound carefully.

[vwinnovator]

[Chickensoup]

they look... virgin
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-'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
-'05 B5.5 TDI Wagon 17in sport rims ;EGR + BSM + ASV Delete, Stage-2 Tune, straight pipe
'65 Tourist Delivery Build
'66 RIP
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Hosea 4:6 "My people are destroyed for lack of knowledge"

[madmike]

short slicks in action ,800+ H.P. Hell Kitty Vs. Turbo Bug
1/8 mile Drags Bug did 7.8 @93 mph
Kitty did 9.00 @ 92 mph

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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[Brian_e]

Those head ports are bone stock with bigger valves stuck in. I say 115hp TOPS with those. Cut for thin 92’s also.

Ditch those heads quick. They will need lots of welding and serious port work to get anywhere near able to support an FK89.

Order some CB wedgeports with 44mm intakes. And get a set of 94mm cylinders. Then you will have a 2276cc, and much closer to the power you are hoping for. I would also drop the cam down a notch or two. Fk87/fk10/86c range.

With the wedgeports and a smaller cam, you should be closer to the 175ish HP range, and make more usable power to get you off the line harder.

Brian
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www.type-emotorsports.com

[raymon covey]

I had the same combination with good ported street eleminator. 1.58 3rd and 1.26 4th. 12.5 compression. 1.4 rockers. 40 mm vents. Best time 7.28 in 1.8 mile. 1915 CC FK89. I had a lot of fun with the little motor.

[rrcade]

What is meant by “short” slicks
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CHEAP - FAST - RELIABLE
You can only pick two of the above.

[b-man]

[67rustavenger]

[rodgersbadassbus64]

Progress on my build...
Purchased 26x7 slicks and centerlines..
Better heads 42x37 with some porting and longer type 4 valves with 650 springs
sig erson 1.5 rockers
Valve pockets Mahles forged.
Fk89 and I'll run as much compression as possible based on clearance with the valve pockets that I have.
Chinese 48 IDA'S
still hoping for 150 + HP...

So now back to a wish list question...
Current transmission is a fresh o mile rancho pro street 3:89 with.89 fourth.
So what 3/4 close ratio gears might I start looking for. My car weight is still in question...it will be what it will...

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Like some other respectable members, "why buy what you can build"

[slayer61]

Sounds like you already have chosen rear end and 4th gear. 3.89:1 rear gear and 0.89:1 4th gear. Good freeway flyer combo. Not sure it's going to be a good drag race combo, though.

PS I really like your build. You have serious vision.
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[rodgersbadassbus64]

I'm looking for direction for a good 3 and 4 gear ratios using the tall slicks, 3:88 along with stock 1 and second gears...🤔
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Like some other respectable members, "why buy what you can build"

[Ohio Tom]

Sorry I missed this post for so long....

Shorter slicks have an issue with contact patch. While you have a gearing advantage with a 23" tall tire, your contact patch will be very small.
The taller 26" tire lays down nicely at the hit and gets great traction for a relatively narrow (6") tire. Good find there...


Looks like you have some nice parts going on there, I'll be following progress. Glad to help as I'm a drag racer myself. Been down your exact path and help many others...

Heads look like they need some port cleanup work and chamber smoothing to be successful at higher rpms and work with your cam.

Typical gearing for a car like yours all things considered:
4. 125 R/P with Stock 3.78/2.06 mainshaft, 1.54 3rd and 1.21 4th. You'll want some tight gears to make a smaller size/big cammed drag motor work. Powerband with that cam is kinda narrow and peaky around 6,500rpm max tq. So the more you can keep the motor close to that rpm, the better. Typical gear spacing for light drag car puts 2nd, 3rd, and 4th very close together. The 1/2 drop is handled by clutch slip. The rest of the gear changes are only 1500rpm drop or less.

If the heads can flow, max rpm can be as high as 8,500rpm, but I don't think your heads will go there. (why I recommend port work).

If you need help with gearing, I'm here. I think I have a few close 3/4 gears in-stock. Glad to help a drag racer any way I can... So few of us left..

I'm on

[Bill Schwimmer]

If you have the stock Sig Erson shafts, they are not going to play well with the CB 650's and the rpm potential of the combination. Just trying to save some headache.

[rodgersbadassbus64]

Newly acquired motor Hoping for 200 HP plus went with 26 inch slicks.... can't wait currently wiring car...
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Like some other respectable members, "why buy what you can build"

[Dauz]

speaking of..
Link