Porting Heads Question
#11
08-30-2016, 08:04 PM
You have the 48 cams which I assume were chosen because you wanted increased low end and midrange above all else. What do you expect headwork to give you and where in the rev range?
Headwork on a stock 96 engine with 48 cams is an unusual combo that none of the big shops do so read into that what you will.
If the heads come off, that's be the time to bore the cylinders and add new pistons. Missed opportunity otherwise.
Cost of headwork v going big bore?
Also consider when heads come off for either work or big bore work, compression is often increased for performance but in your case this wouldn't suit your 48 cams.
I wouldn't do the headwork myself. I'd either leave it as it is or go the full hog and do headwork along with big bore and cam change.
Headwork on a stock 96 engine with 48 cams is an unusual combo that none of the big shops do so read into that what you will.
If the heads come off, that's be the time to bore the cylinders and add new pistons. Missed opportunity otherwise.
Cost of headwork v going big bore?
Also consider when heads come off for either work or big bore work, compression is often increased for performance but in your case this wouldn't suit your 48 cams.
I wouldn't do the headwork myself. I'd either leave it as it is or go the full hog and do headwork along with big bore and cam change.
#12
08-30-2016, 09:11 PM
Seasoned HDF Member
#13
08-30-2016, 09:30 PM
#14
08-31-2016, 06:00 AM
Sponsor
Heads will not offer you a dollar value on that combo.
A good tune will historically yield at/very near 90 hp and 100 ft/lbs.
Lastly, a 107" will push the compression up over the top, for the use of that 48.
We have matched, "budget-build" 107"/S&S E-Z cam combos, starting as low as $998.00.
Scott
A good tune will historically yield at/very near 90 hp and 100 ft/lbs.
Lastly, a 107" will push the compression up over the top, for the use of that 48.
We have matched, "budget-build" 107"/S&S E-Z cam combos, starting as low as $998.00.
Scott
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HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
#15
08-31-2016, 06:18 AM
Banned
headwork will help any build as long as the heads are ported for the exact build their being used on,that said,looking for more power,a 107" kit (or even a 103" kit) will give more power.we have used the 48`s with a 107" kit (once,for a guy on HTT) by opening the combustion chamber to 90 cc (10.0-1),worked very well,so it can be done if your stuck on the 48`s
#16
08-31-2016, 08:09 AM
#17
08-31-2016, 08:35 AM
Intermediate
Join Date: Feb 2008
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106" w/ andrews 48 cams
check out this dyno sheet published on HTT. Looks like a good combination.
http://harleytechtalk.org/htt/index....c,90486.0.html
http://harleytechtalk.org/htt/index....c,90486.0.html
#19
08-31-2016, 12:03 PM
Seasoned HDF Member
#20
08-31-2016, 12:12 PM
Heads will not offer you a dollar value on that combo.
A good tune will historically yield at/very near 90 hp and 100 ft/lbs.
Lastly, a 107" will push the compression up over the top, for the use of that 48.
We have matched, "budget-build" 107"/S&S E-Z cam combos, starting as low as $998.00.
Scott
A good tune will historically yield at/very near 90 hp and 100 ft/lbs.
Lastly, a 107" will push the compression up over the top, for the use of that 48.
We have matched, "budget-build" 107"/S&S E-Z cam combos, starting as low as $998.00.
Scott
-G
