Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[sbcharlie]

we have modified many 103 engines for customers with proven results. the first thing that i feel inportant is keep the engine original for future value. the biggest problem is the heads and compression. the 103 stock is an epa engine and has a hemi designed combustion chamber with a flat-top piston. what we do is weld heads combustion chamber and replace both guides and seats. we machine in a twin swirl combustion chamber and install a 2in intake valve, we stick with stock exhaust vale size. we set compression to match cam, we set at 10.1/1, recomend andrews tw55 cam is our choice or S&S 585. we see 112-115 ft llbs of torque and 108-111 hp under 5200 rpm.at 2200 rpm  we see 98 ft lbs of torque.these are mild engine builds, we have to consider the crankshaft non timken bearing issue. we port heads to 2in valve and repaint heads to match there bead blasted paint finish. we use standard 103 pistons and .030 cometic head gasket.i strongly urge the use of an efi tuner to control efi igntion and fuel mangement. the efi tuner has a anti knock sensors that assist in getting a correct igntion curve. we have proven fuel maps with flatline air fuel ratios that stay at 13.5 air fuel curves.i do recomend a fueling oil pump to assist in oil scavanging.i also recomend compression releases to assist in heat soak to assist in starting to help save starter. with our choice of cam and compression we target compression at 180 lbs.
thanks short block charlie

[Cabo]

 how much does something like the work you described cost? I currently have a SEEG with SE stage 1, 257 cams, and Rinehart exhast and a PC3.  I installed porker tork cones and the 2" baffles totry and get more back pressure.  Just had my bike dynoed at Cliff Piper's and was unimpressed to say the least.  The Fuel curve was terrible but all I got was a max of 96lb tork and 90hp at 5000rpm (Cliff wouldnt go any higher rpm cuz it was running too lean at the top..and too rich between 2000rpm and 3000 rpm).  Tork at 2000 rpm (were the fuel ration was close to correct) was only 74lb.

The fuel curve was below 10 at 2500rpm and over 18 at 3600rpm.  Gonna have it dyno tuned next week unless I decide to make any changes to the motor before then.

Ps I am not posting the sheet cuz it sucks too bad!

Thanks

[sbcharlie]

cliff piper is good friend of mine. i wentto his shop this spring and showed how to build these engines. do you have a efi tuner on the bike? on head modification we charge
$750.00 for everthing include new valves, seats and guides. the springs that come with these heads are good for mild lift cams that we recomend. thanks charlie

[Cabo]

Have you had any experience with the gear driven Woods Cams? They look to be similar to the S&S 585 or the SE 251 but gear driven.

Yes I have a Power commander.. Thats how I found Cliff.

How long does it take you to perform the work (when you get back from Montana) once  you Get the heads? I am Interested.

Also the torque and HP number you are using, what exhaust was used?

[sbcharlie]

i will be back in august 5 . it takes a week to perform the work on your heads. i think bob woods makes some neat cam grinds that would work well with our heads.the only thing i am conerned about is your power commander. the fuel curves will not be a problem it is the ignition curves. the efi tuner has many options like ignition retard and such. we have had good sucess with rhineharts, vance and hines and white brothers.thanks charlie

[nitz]

New to the board although I was a vistior for some time before my recent purchase of an 03 Serk.  Charlie, your proven hop-up has sparked my curiosity to say the least.  I've already installed the race tuner, Rinehart's, and an SE air kit.  Are your maps available if I would decide to install cams and have head work done?

[sbcharlie]

we have many mapps to assist you on your engine modification.
thanks charlie

[laylonlor]

 [smiley=shifty.gif]had a race tuner,  s/e slip ons, s/e air cleaner,installed   today ,  on my o4 seeg at hannums H D in media pa. and had it dynoed also  ,i got 89 hp and 93 tourqe, i was expecting more than that, after reading what some others have posted, but  hannums  has an out dated dyno ,it does't have the stiffer, i want to get it tuned by some one who knows how to do it , in this area , does any one know of any............thanks [smiley=worthless.gif]

[laylonlor]

 [smiley=huepfenjump3.gif]how can i get 100 hp on my seeg, somebody help me [smiley=6.gif]

[gb]

Ok...Here you go. [smiley=beerchug.gif]. I got almost 100 on a hot day 0 humidity @close to 2000' above sea level.http://flhrsei.org/cgi-bin/yabb/YaBB.cgi?board=g1;action=display;num=1073810022;start=15

03 serk
se racing slip-ons
se breather
se 258 cams
se race tuner. [smiley=xyxthumbs.gif]

[JCZ]

Ok...Here you go. [smiley=beerchug.gif]. I got almost 100 on a hot day 0 humidity @close to 2000' above sea level.http://flhrsei.org/cgi-bin/yabb/YaBB.cgi?board=g1;action=display;num=1073810022;start=15

03 serk
se racing slip-ons
se breather
se 258 cams
se race tuner. [smiley=xyxthumbs.gif]

2000' above sea level.......your dyno numbers look good to me.  I believe mine was 101 HP and 104 lb. ft torque (it's posted here on this site, someplace) and that's at 20' above sea level (temp. makes a difference, also) with SE high flow air cleaner, Race Tuner and Vance & Hines Pro Pipe.  That's about what the others were getting, with similar mods.

[laylonlor]

WHAT MODEL DYNO MACH. DID YOU USE TO GET YOUR 100 HP ON [smiley=beerchug.gif]

[gb]

Dynojet. Don;t know what model, but you can call Barnett HD in el paso and ask them the model. 915-592-5804.
Hope this helps. [smiley=laugh.gif]

[laylonlor]

thanks i'll call texas about the dyno

[Sir_Nuke]

I believe the dyno at Barnetts is a DynoJet 250 Chassis dyno.....but they are not a DynoJet tuning center....but the know what they are doing.