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103 home build - 5/15/2008 8:11:25 AM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline Well I have had my 103 running for about 1000 miles. I had this dyno run at 500 just to see where I was at. I had a exhaust manifold leak on the rear cylinder since corrected. I think that is why it leaned
out so much at 2500. It was giving my O2 sensors fits. I have been working on my baffles to try to add some back pressure. I can tell there is a difference at the upper rpms. This is a true dual setup with S&S oval mufflers. The build is SE 103 (Jim's) crank, SE forged flat top pistons, home ported heads stock valve sizes, 85 cc chambers, woods beehive springs, black diamond valves, TP rocker boxes and roller rockers, cometic .040 head gasket, Woods tw6gh cams, SE 50mm throttle body, delkron cam plate, fueling oil pump. DTT wego II computer.

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Post #: 1

RE: 103 home build - 5/15/2008 9:02:23 AM

SkyRider

Posts: 182
Joined: 2/13/2008
Status: offline with all that work the numbers are a little dissapointing

(in reply to cts1950)

Post #: 2

RE: 103 home build - 5/15/2008 7:11:23 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline I would agree the numbers are lower than I was hoping for. I had several things I was trying to achieve which are contradictory to big numbers. Keeping the exhaust noise lower than other setups I have had. Having a flat torque curve was important also this is on my ultra and I sometimes pull a trailer. That said I know there is more power in there and I still working out the bugs. I have not seen a 2 into 1 exhaust that is quiet enough for my liking the D&D fatcat comes to mind. I haven't seen many users with the Twin Tech closed loop injection with high numbers either. I have a dual 50 mm throttle body that I am thinking of trying.

(in reply to SkyRider)

Post #: 3

RE: 103 home build - 5/16/2008 6:32:58 AM

mentor70

Posts: 1077
Joined: 12/24/2006
From: Diamond Bar, California
Status: offline I think compression could have been set alittle higher, and the headwork may be holding things back abit too.

I would expect around 115 to 125 lbs of torque and 105 to 110 HP. with a 103 build similar to this.

_____________________________

HQ 95 ci, .575 Firestorm cams
DTT ignition
Stage eleventeen HVP heads.
10.2 to 1 comp.
Miknui 42mm
D&D fat cat

(in reply to cts1950)

Post #: 4

RE: 103 home build - 5/16/2008 8:09:22 AM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline The compression ratio is 10.08 to 1 corrected compression is 9.29 for the cam. The cylinder head flow numbers

Readings at 28" WC Temp 72 Baro 30.18 humidity 84% 85 cc chambers

Lift --------- Intake ---------- Exhaust
100 ---------- 71.5 ----------- 60.0
200 -------- 145.0 ---------- 122.2
300 -------- 207.1 ---------- 169.7
400 -------- 234.3 ---------- 190.6
500 -------- 251.0 ---------- 200.8
600 -------- 258.1 ---------- 207.4

(in reply to mentor70)

Post #: 5

RE: 103 home build - 5/16/2008 9:25:24 AM

SEDELUXE

Posts: 85
Joined: 12/21/2007
Status: offline i think you need a tune...

(in reply to cts1950)

Post #: 6

RE: 103 home build - 5/17/2008 7:53:36 AM

Dalton

Posts: 5968
Joined: 2/12/2007
From: Northeast Ohio
Status: offline
The DTT TCFI II is an excellent tool in the right hands. My 103 last year made 120hp, 122 tq max and when tuned for economy where I eventually left it was making 112 hp and 118tq self tuned with the DTT. You need to work some more with this, but the mix and match build you did might not get much more than where it is.

Do not try the dual runner throttle body as it is overkill for your build and will just give you tuning fits. I am running a SE 50mm with SE 4.89gm/sec injectors on my 120 and it pulls fine. Ran the same TB and injectors on my 103 and it was more than enough.

Go back to tuning, that is where any gains will be made.

_____________________________

Veni, Vidi, Vici

(in reply to SEDELUXE)

Post #: 7

RE: 103 home build - 5/18/2008 7:05:38 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline I think I have found some more power in the twin tech. I got a copy of the mega squirt viewer which will display 12 lines of info from the log file at once. I noticed on a wide open throttle run the afr ratio was staying at 13.5 when the map said it should be 12.5 . I suspect that since my estimated hp was dialed in at 100 the max pulse width held the computer back. Since then I have been working the estimated hp up 10 at a time and doing a wot run and checking the graphs. I now have it set at 145 hp and and the pulse width of 16 the afr is staying where the map tells it to be. I just got back from a 200 mile run over a 5500 ft mountain pass twice and got 42 mpg. I still am working on fine tuning the advance curve to get rid of the pinging almost gone now. The heat wave we just had from the 50s to the high 90s in two days brought that out. I haven't had a chance to get back on the dyno (the busy season) to see if I have been making progress. My seat of the pants dyno says yes and rideability has been improving. I have been working on baffling my mufflers and now the only aggravation is the noise out of the intake. I hadn't noticed it until short helmet season. I lined the inside of the air cleaner cover with 1/8 foam to absorb some of the reflected noise with some improvement. Would you be interested in posting a copy of your tuning file so I could compare what you have done?

(in reply to Dalton)

Post #: 8

RE: 103 home build - 5/18/2008 9:42:43 PM

mentor70

Posts: 1077
Joined: 12/24/2006
From: Diamond Bar, California
Status: offline I have a feeling theres a lot of torque just waiting to tear up your rear tire!

_____________________________

HQ 95 ci, .575 Firestorm cams
DTT ignition
Stage eleventeen HVP heads.
10.2 to 1 comp.
Miknui 42mm
D&D fat cat

(in reply to cts1950)

Post #: 9

RE: 103 home build - 5/18/2008 9:53:02 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline I see you have a fat cat 2>1 system. I have seen remarks like fat cat with quiet baffle. I have been to their website and can find nothing to indicate quiet baffles? What is your experience with your mufflers?

(in reply to mentor70)

Post #: 10

RE: 103 home build - 5/18/2008 10:01:02 PM

mentor70

Posts: 1077
Joined: 12/24/2006
From: Diamond Bar, California
Status: offline The Quite baffle is a speical order kinda deal from what im told. You can buy one and install it in a regular pipe if you want to. Im happy with the standard baffle, I get my torque very early and my scooter is quick.

_____________________________

HQ 95 ci, .575 Firestorm cams
DTT ignition
Stage eleventeen HVP heads.
10.2 to 1 comp.
Miknui 42mm
D&D fat cat

(in reply to cts1950)

Post #: 11

RE: 103 home build - 5/18/2008 10:19:16 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline I have had a set of reinhart true duals on my bike and did not like the sound. It was way to sharp of a note for my liking and for those who followed behind me. The summer before last I took about a 4000 mile road trip and my ears were ringing for a month after I got back. I even tried a thunder header 2>1 set up It came off after the first trip. I even found a supertrapp muffler with 2 1/2 inlet to hook on the thunder header head pipes still too loud. I saw the S&S oval mufflers and figured that with the large cavity they could lower the note they do but for some reason my motors have been louder than others with the same pipes. I guess what I think I want is not the way for the most power I'm trying to find a compromise.

(in reply to mentor70)

Post #: 12

RE: 103 home build - 5/18/2008 10:33:09 PM

mentor70

Posts: 1077
Joined: 12/24/2006
From: Diamond Bar, California
Status: offline PhilM has the quite baffle in his HQ 120 and Its making 157 lbs of torque. I think my standard Fatcat is quite while ridding on the bike, the quite baffled Fatcat may be the one for you.

_____________________________

HQ 95 ci, .575 Firestorm cams
DTT ignition
Stage eleventeen HVP heads.
10.2 to 1 comp.
Miknui 42mm
D&D fat cat

(in reply to cts1950)

Post #: 13

RE: 103 home build - 5/18/2008 10:39:45 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline My local dealer will order one for me from his custom chrome catalogue they are in the process of liquidating all their inventory for the bank. He in fact handed me the catalogue to take home. So what I think your telling me is the quiet baffle is a factory special order. I like the looks of them especially with the ghost muffler.

(in reply to mentor70)

Post #: 14

RE: 103 home build - 5/19/2008 3:36:32 AM

PitDog

Posts: 134
Joined: 6/12/2007
Status: offline you can order the fatcat with the quiet baffle installed, you don't have to buy the standard and change it.
zippers charged me $40 or $50 extra to do this.

(in reply to cts1950)

Post #: 15

RE: 103 home build - 5/19/2008 8:31:17 AM

PhilM

Posts: 4842
Joined: 2/24/2006
From: TX
Status: offline

quote:

ORIGINAL: mentor70

PhilM has the quite baffle in his HQ 120

Mine actually has the "BigBore" or "Performance" baffle, not the quiet. It is NOT quiet.... it is a loud MF'er!

When you order a FatCat with quiet baffle, the last two digits of the part number are "QB". For example: 506-32B (standard baffle) vs 506-32QB (quiet baffle).

_____________________________

______________________________
Hint for today (and tomorrow!): ALWAYS use components that COMPLEMENT one another!
Power by Head-Quarters

(in reply to mentor70)

Post #: 16

RE: 103 home build - 5/19/2008 2:26:04 PM

PitDog

Posts: 134
Joined: 6/12/2007
Status: offline
quote:

ORIGINAL: PhilM

quote:

ORIGINAL: mentor70

PhilM has the quite baffle in his HQ 120

Mine actually has the "BigBore" or "Performance" baffle, not the quiet. It is NOT quiet.... it is a loud MF'er!

When you order a FatCat with quiet baffle, the last two digits of the part number are "QB". For example: 506-32B (standard baffle) vs 506-32QB (quiet baffle).

exactly! mine came with the qb on the part #.

(in reply to PhilM)

Post #: 17

RE: 103 home build - 5/19/2008 3:41:37 PM

cts1950

Posts: 26
Joined: 5/11/2008
Status: offline Thanks for the input on the fat cat and how to specify the quiet baffle. I would welcome users of the Twin Tech to confirm if I am on the right track on the set up to get the hp and torque out of this motor with the pulse width adjustment.

(in reply to PitDog)

Post #: 18

RE: 103 home build - 5/19/2008 6:50:26 PM

mentor70

Posts: 1077
Joined: 12/24/2006
From: Diamond Bar, California
Status: offline
quote:

ORIGINAL: PhilM

quote:

ORIGINAL: mentor70

PhilM has the quite baffle in his HQ 120

Mine actually has the "BigBore" or "Performance" baffle, not the quiet. It is NOT quiet.... it is a loud MF'er!

When you order a FatCat with quiet baffle, the last two digits of the part number are "QB". For example: 506-32B (standard baffle) vs 506-32QB (quiet baffle).

Dude, you just told me the day before you dynoed it was a quite baffle!, I think that HQ 120 did somthing to it

_____________________________

HQ 95 ci, .575 Firestorm cams
DTT ignition
Stage eleventeen HVP heads.
10.2 to 1 comp.
Miknui 42mm
D&D fat cat

(in reply to PhilM)

Post #: 19

RE: 103 home build - 5/19/2008 7:00:15 PM

PhilM

Posts: 4842
Joined: 2/24/2006
From: TX
Status: offline

quote:

ORIGINAL: mentor70
Dude, you just told me the day before you dynoed it was a quite baffle!, I think that HQ 120 did somthing to it

WARNING: Crack KILLS!

hahahahha! No, it's a perf baffle.

I had a Quiet baffle in the Boazilla, but not in the FC.....

_____________________________

______________________________
Hint for today (and tomorrow!): ALWAYS use components that COMPLEMENT one another!
Power by Head-Quarters

(in reply to mentor70)

Post #: 20

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