bigbuk30
Novice Class
Posts: 31
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posted February 04, 2012 09:20 PM
47 or 48 tbs
hey guys i was thinking about getting a set of these but i see theres no concete answers with people who have tried them, most have said they didnt gain what they thought they would but some were setup on stock motors and not built motors i have a setup which is greater than 1500cc head and cams so would this move gain 10hp or better on my setup dont want to spend money for something thats not putting as said thanks
  
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blackbullet76
Pro
Posts: 1134
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posted February 04, 2012 11:19 PM
I think I remember someone on here saying a set of 47mm tb's would give a stock 14 around 8 hp's.
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2007 ZX-14 black
Brocks s-meg exhaust
PCIII w/track map
BMC race filter
Flies removed
16 tooth front sprocket
Speedohealer
APE cam chain tensioner
Vortex rearsets
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justoyz2
Zone Head
Justoyz Racing
Posts: 858
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posted February 05, 2012 02:05 AM
Contact Jim at Competition CNC, he can give you the specifics you are seeking for your particular engine build
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2012 zx14R-blue,2012 zx14R-black, 2014 zx14Trbo, 2011 zx10R, 2007 zx10 Turbo.....
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Swiftkart
Expert Class
Posts: 349
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posted February 06, 2012 07:20 AM
The rough numbers are as follows.
Bone stock, 1 to 3 hp gain
Stock with Milled or SS head, 4 to 6hp my bike gained 6hp with SS angle milled head
Big motor/head, 15 to 20hp
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2006 ZX14, Brock CT-Meg, PC, ignition module, E85, 214 lbs suited, 8.96@152.32 1.46 60'
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blackbullet76
Pro
Posts: 1134
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posted February 06, 2012 09:20 AM
Ok, guess I was wrong :-)
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2007 ZX-14 black
Brocks s-meg exhaust
PCIII w/track map
BMC race filter
Flies removed
16 tooth front sprocket
Speedohealer
APE cam chain tensioner
Vortex rearsets
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted February 11, 2012 05:46 AM
Sorry, I missed this thread before...
A zx14 with a pipe on it will pick up about 8 hp with our 47mm units.
Dan Millholland who is a regular board member here can elaborate more on his particular setup, but he got 8 hp and thats the average of what we are getting for feed back on similar combos.
On larger motors these gains are higher but its hard to say what exactly because the builds all vary. But some guys have seen over 18 hp. 13-16 hp is very typical.
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Y2KZX12R
CompetitionCNC.com
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oldkawboy
Needs a job
Posts: 2125
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posted February 11, 2012 06:47 AM
I did pick up between 7 and 8 hp on back to back dyno pulls with tuning before & after but I do have a Coby Adams head on my bike.
I also run a Brocks CT, I feel like the good headwork and good pipe are a great combo for the 47's.
The bike made more power all the way thru with no loss down low. They idle and "carburete" just like the stockers.
Dan
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted February 11, 2012 03:46 PM
Dan post a pic of your silver bullet...
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Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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northernkaw
Expert Class
Posts: 215
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posted February 13, 2012 11:50 AM
if you are over 1500 cc go with the 48s. with a good head you should pick up 12 to 16 hp.
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slacker83
Novice Class
Posts: 50
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posted February 14, 2012 06:55 AM
I'll be sending mine out to turn into 47's this week to competition cnc!
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BrucerZX14
Expert Class
Posts: 373
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posted February 15, 2012 06:56 PM
I got the 47mm ones on my ZX14. Along with Jim's SS head. Gonna put it on a dyno this month. I have the Brock's map for this set up but want to get it tweeked for our area.
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quikgix
Expert Class
Posts: 274
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posted February 16, 2012 06:57 AM
Them East coast dyno's are very generous!! I picked up 1HP with the 47's. Ported head, milled for compression, sidewinder, MR12. But I will say I picked up MPH and thats all that matters to me.
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1352cc 8.39@159mph on motor cant wait to spray this bitch
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