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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
i had no intention of sabotaging anything, and if is or was taken that way, i do apologize. i just get upset when someone with very limited experience tries to advise someone (who may also have very limited experience) on topics that they do not have enough training and practical experience to back up their statements. THIS CAN GET SOMEONE INJURED OR KILLED, when it comes to motorcycles, so please take it for what its worth. not only that but be very costly and frustrating also.
m
Telling people ya need a 2in1 to make power is the biggest line of internet bs. Especially low end power. If he wants one, fine. Many people here don't but have bullshitted by people like you into thinking they have to or their buipds will suck. Truth is many 2in1s flat out suck at low end power. Especially with cams with alot of overlap.
The op is running hp cams with 52° overlap. Better be careful what 2in1 you tell him spend his $$$ on to improve his low end.
In his case tho, between those heads and that 58mm, he absolutely killed velocity. As I recall those heads have a pretty thin roof too.
There's a local HD tech I know absolutely loves the 259E. He uses them often and is running them in his own stage 4 build but I know he's not using those heads. I could see what he thought about how well they would work with them tho before you go throwing any more money at it. I'll see what he recommends for exhaust with them even tho they're no where near as sensitive as the 260s. He's running a Thunderheader with them.
One of my favorites for a great 212 is Khromewerks.
So that's a stage 4 103 with 260 cam and 110+ heads?
Before you start throwing cam ideas around maybe you should find out what you heads flow a.400", .500", .600" and .650"... Bigger cam doesn't always mean more power.. T-man cams in my opinion emulate Bob Woods cams and are pretty good.. I think they carry a nice torque curve. Take a look at the TW-9b. I've used the 9b in a 96"Evo and it made very good low end torque but the heads were set up for the cam... As you see in the following sheet.
Edited: would just like to add that the TW- 9b would require a little more comp to shine.. 10.8:1 minimum...
And by the way, this Dyno run was with a 2-1 Supertrapp tuned by Hillside...
Last edited by 98hotrodfatboy; Apr 25, 2021 at 08:18 AM.
Before you start throwing cam ideas around maybe you should find out what you heads flow a.400", .500", .600" and .650"... Bigger cam doesn't always mean more power.. T-man cams in my opinion emulate Bob Woods cams and are pretty good.. I think they carry a nice torque curve. Take a look at the TW-9b. I've used the 9b in a 96"Evo and it made very good low end torque but the heads were set up for the cam... As you see in the following sheet.
Edited: would just like to add that the TW- 9b would require a little more comp to shine.. 10.8:1 minimum...
And by the way, this Dyno run was with a 2-1 Supertrapp tuned by Hillside...
Nice numbers there, thanks for sharing. Thats an awesome torque curve
This is the headflow numbers from the SE catalog, not sure how accurate the numbers are
Mine are the 110+ heads
I've heard Scott from Hillside say several times that with a little work on those 110+ heads they can work and now I see why, those flow numbers are terrible.. At a half inch of lift it's already done so there's no need to go with any bigger cams or longer duration because those heads are going to restrict everything. Unless you send them to a good Porter you might as well stick with the Woods 555's. I've had a few sets of heads from Scott, stage 2 and stage 3. Both were Evo heads and the stage III were with 194 intakes and 165 exhaust and I was flowing 284 in an EVO motor, 96 in... I recently purchased a set of stage II heads for a tc-103 motor that were ported by Scott for the 570-2 cams but I used the Woods TW-5-6 cams and I will say that I don't believe there is a single stage 4, 110 SE motor that can touch me.. Don't get me wrong, I'm not trying to brag... I'm just trying to state how weak those setups are.. If you really want to up the power invest in a better set of heads, one that flow at least 260 @.500"and atleast 280@ .575" lift..
I've heard Scott from Hillside say several times that with a little work on those 110+ heads they can work and now I see why, those flow numbers are terrible.. At a half inch of lift it's already done so there's no need to go with any bigger cams or longer duration because those heads are going to restrict everything. Unless you send them to a good Porter you might as well stick with the Woods 555's. I've had a few sets of heads from Scott, stage 2 and stage 3. Both were Evo heads and the stage III were with 194 intakes and 165 exhaust and I was flowing 284 in an EVO motor, 96 in... I recently purchased a set of stage II heads for a tc-103 motor that were ported by Scott for the 570-2 cams but I used the Woods TW-5-6 cams and I will say that I don't believe there is a single stage 4, 110 SE motor that can touch me.. Don't get me wrong, I'm not trying to brag... I'm just trying to state how weak those setups are.. If you really want to up the power invest in a better set of heads, one that flow at least 260 @.500"and atleast 280@ .575" lift..
just to address the comment about the TMan 625 cam. ive tried both in my current main ride, which has Stage 3 headwork from Kirby. the Tman 625 would run out of gas at about 5,700-5800. The Wood 9b pulls all the way to redline. the Tman is quiet, the Wood is not. the curves were similar, but the peak numbers of the wood beat the tman. same engine set up, just the 2 different cams. tuned on my dyno, by me. both cams ran good and the ride was good, i kept the wood cam in it because it did run better and i was getting lazy by that time. no matter what i did i couldnt get the tman cam to break 120 hp, the wood did.
if you are going to run the 110 heads, definitely have them ported, you will be much happier not matter what cam you choose, low lift performance is every bit as important as anything else mentioned.
m
just to address the comment about the TMan 625 cam. ive tried both in my current main ride, which has Stage 3 headwork from Kirby. the Tman 625 would run out of gas at about 5,700-5800. The Wood 9b pulls all the way to redline. the Tman is quiet, the Wood is not. the curves were similar, but the peak numbers of the wood beat the tman. same engine set up, just the 2 different cams. tuned on my dyno, by me. both cams ran good and the ride was good, i kept the wood cam in it because it did run better and i was getting lazy by that time. no matter what i did i couldnt get the tman cam to break 120 hp, the wood did.
if you are going to run the 110 heads, definitely have them ported, you will be much happier not matter what cam you choose, low lift performance is every bit as important as anything else mentioned.
m
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