Dual plug head finally finished!

[catfishwhisker]

It may not be a TC head, but I'll take it...lol The machine shop done a super job on it. Can't wait to get it going.

[catfishwhisker]

another:

[catfishwhisker]

one more:

[3WheelsForever]

Thats awesome Cat. Youve been wanting one of those head for a long time. And now youve got one. Not to be nosey just wondering how much did it cost you to get that done? Let me know how it works out man, good luck. :-D

[HemiChallenger71]

Holy crap, that's crazy. Doesn't oil come out the plug boot, and how did you rig up for both plugs to fire? Just splice the wires from coil to the other coil?

[84250r]

VERY cool,Cat! What kind of performance gain do you get from a dual head plug? More compression?

[200xman]

Holy crap, that's crazy. Doesn't oil come out the plug boot

Yeah, I was wondering the same thing except I would be worried about dirt getting in. :?

[catfishwhisker]

I haven't put in in yet but there's a rubber boot that goes in the hole around the plug. There's not that much oil up there anyway, more less a vapor is all. Just a small amount of silicone and it won't leak. I've got a coil with two wires coming out of it, gonna have to check to see if they both fire at the same time. If not, I'll have to use 2 coils. 3wheels: Can't tell you how much it cost right now, might want to sell a few....lol. 84250R: It won't give it any more compression, just a more even burn of the fuel. It ain't going to help a whole lot stock, but with alot of compression and good fuel, you can definitly tell a difference.

[Tri-Z Pilot]

Did you just take the stock head and modify it to run two plugs?

[CHAINSAW]

Sounds risky man.. lol
Your gonna have to run her really rich now to keep from toasting that piston.

[TRI-Zbrian]

yeah i was wondering the same thing also how did you wire it up to get a second plug to fire?

[CHAINSAW]

Ive heard of people do this, but with bad results. I wish you the best of luck though.

[MPNX2]

Looks interesting I hope it works well. Isnt there a bolt that runs down through the cylinder head in the same spot where the new spark plug is? Thats the way my '83 cylinder head is at least.

Keep us posted...

[catfishwhisker]

Yes there is a bolt that runs down through where the plug is but it really doesn't need to be used anyway. The 4 head bolts will be plenty to seal off the combustion chamber. As long as the head and cylinder mating surfaces are flat, that bolt not being there won't be an issue. Chainsaw, who else has been running these heads? I know of only 2 people that made them for racing and it was TC Racing and Curtis Sparks at the end of his 3-wheel career. I ran one for about 2 years and never had the first problem with it (except for over revving and bending a valve once). Why do you say I'd have to run it real rich to keep from frying the piston? The fire won't be "hotter", just more of it. The fire from the spark plug doesn't burn the piston, it's the air/fuel mixture. With the other plug on the other side, you'll get a better evenly fuel burn. With one plug, when the spark plug ignites the fuel, the flame has to travel from the spark plug all the way across the combustion chamber. With 2 plugs, the flame doesn't have to travel near as far to be completly ignited, which in turn means quicker ignition of the fuel, which in turn creates more power.

[CHAINSAW]

the guy Im buying my new Tri Z from told me about doing this, amoung other things like turning air cooled cylinders into water jacketed beasts for making killer stroker motors.
What your saying might be true, I was just saying I would leave the engine designing to the manufacter of my machines is all.
It might very well work in a 4 stroke motor, and be the best thing ever (I dont work on 4 strokes, so thats why I say that) I made my comment based on knowing a little about internal combustion motors. The first rule of thumb.. more fire=more fuel. It just seems to me like you would have to have more fuel to compensate for all that fire.

[Jeb]

The dual plug head is an old race mod from back in the day. You guys ought to figure he knows what he's talking about if he ran one for two years while he was RACING in the 80's????? :D

Catfishwhisker, glad to see you've got one! Pretty good idea just to have one made! Someday a TC head will show up! Good luck with it.

[Lots_Of_Nothing]

haha you guys are cracking me up, saying all this bad crap, WTF...they used to make em for the racers, so obviously there good, and cat used to have one, so obviously he knows what hes doing

[CHAINSAW]

Im not knocking his ideas or engine building. Its a cool idea. I guess I just like a more reliable machine these days instead of ultra modified ones. Like I said before,. more power to you dude.. hope it works out for ya.

[ATCRYDER]

I haven't put in in yet but there's a rubber boot that goes in the hole around the plug. There's not that much oil up there anyway, more less a vapor is all. Just a small amount of silicone and it won't leak. I've got a coil with two wires coming out of it, gonna have to check to see if they both fire at the same time. If not, I'll have to use 2 coils. 3wheels: Can't tell you how much it cost right now, might want to sell a few....lol. 84250R: It won't give it any more compression, just a more even burn of the fuel. It ain't going to help a whole lot stock, but with alot of compression and good fuel, you can definitly tell a difference.

If you can get 86/87 300X Dual-Plug Heads, youve got your 1st customer right here.

[NOS_350X]

I wana do that to a 350x. I could completly confuse some people "2 exhaust, 2 spark plugs, 2 cylinders." I could see it fooling quite a bit of people.

[Dan Tenn]

What does the TC stand for in "TC dual plug head" ? Just curious.

[3WheelsForever]

I think the TC stands for Tom Carlson, hes the owner of TC Racing.

[J.D.]

I wana do that to a 350x. I could completly confuse some people "2 exhaust, 2 spark plugs, 2 cylinders." I could see it fooling quite a bit of people.

HHAHAAH! Those duchebags would never know what hit them!!!!!!!!!

[Curtis-Tecate3]

3 Wheels Forever is correct.
TC = Tom Carlson


Curtis.

[catfishwhisker]

I agree with Chainsaw, the more reliable the better. I'd much rather go get on something reliable than to get on something that hauls a** that you have to work on every 30 minutes. I'm just doing this to relive my youth so to speak. I don't think I'll make this motor very radical, just something with a little more punch than the standard X. Although it would be nice to have the head machined to accept needle bearings for the cam and maybe fabricate some roller rockers. ;)

[TRI-Zbrian]

lol i thinks its a little much for a 200x but to each his own if it was me id just buy a bike with a bigger engine then put money it into a 200x but soem times its cool to make the little machines fly too lol little sleepers :twisted:

[motoman1012002]

Go for it man i got a 84 and 85 200x and my 85 can out run a warrior

[PowerTrike]

Looks like a sweet head! I'm really interested to see how it works out for ya. (Performance, driveablility, and dependability) More power to ya!

[slippy4]

....More power to ya!

literaly, lol

[smokinp]

I hope it works it :D

[CHAINSAW]

Well I said I talked to a guy who built one in another post.
When I picked up my new Tri Z this weekend, he gave me that motor also. So here are pics of it done on a 2 stroke. Its not as clean looking as yours, but here it is. He agreed that it burned a lot cleaner, but no huge power difference. He got the idea from Curtis Sparks. He also said, the larger the bore size, the more this helps! He raced a 200x with one, and said the cylinder is to small for 2 plugs, but you get up to 350-400 bore size, and dual plugs will help in the power.

http://casketcrewsnipers.hypermart.net/dp1.jpg
http://casketcrewsnipers.hypermart.net/dp2.jpg

[slippy4]

chainsaw, ill take that head off you hands :D

[CHAINSAW]

Im sure you would!! lol :D

[jason85atc250r]

i use to have a 83-85 tc racing 200x motor in a 88 250r frame. the guy that biult it used to race the pro 3 wheeler class at the nationals. his name was mac mohr. he lives in southern PA around York PA. the one i used to have had 13.5 to 1 compression you had to wear riding boots to kick. his engines are so biult up you can ride for more than a motocross race or they over heat real bad. with his mx motor will not last a 1 hour 15 minute hare scramble or it will blow up they get to hot even on race gas. they will smoke 250r's. he uses harley coils for his dual plug engines. they have a coil; wire sticking out of each end of the coil.------------ the head you made is identical to how he does it you just won't get his good port work.

[motoman1012002]

im thinking aobut making one for my new 200x racer im goin to build

[catfishwhisker]

Well, i raced mine for a long time and never had any problems with overheating. TT's, flattrack, MX, it didn't matter. Maybe the motors that Tom built for his riders were a little different than the individual parts you could buy from him. I don't remember any of his riders ever having any major engine problems like the Powroll and Curtis Sparks engines did. Not saying that they weren't fast, but they didn't hold up near as well as the TC motors. I'm sure there were exceptions, like Sparks's own personal motor. I can guarantee that it was totally different on the inside than the ones he'd build for you. You can bet it was done right. As far as the Powroll motors, they were some screamers! On a tight track, they were tough to beat, but get them stretched out and things started breaking fast. The revved entirely too high. On the 199cc rule, instead of stroking and using a small bore, they de-stroked and used a big bore and the rod just couldn't handle it. If they could have gotten the bugs worked out of that, they would have been the motors to beat....period. Just my 2 pennies worth. :-P

But, I'm still looking for a TC dual plug head.....lol

[TRI-Zbrian]

i dont think a 200x would beat a 250r any day but maybe with enouph money i guess but thats something id definatly have to see with my own eyes.

[jason85atc250r]

the reason mine would overheat like that was because it had 13.5 to 1 compression and a really big cam. i called tom about the engine the one time it blew up after i ran a harescramble with it. he told me in person that it would not hold up. he told me the one i had should be rebuilt after 5 mx races. i found out a little late though. with the cam you could not put around in 1st gear it would stall all the time. you had to rev this thing like a 2 stroke mx bike hold it pinned all the time. my 85 atc 250r has way better low end grunt then it did. the guy i got it from raced it once in the 200x 3 wheeler frame in the 250 pro class and got in the top 5. he would be rite on curtis sparks tail or beat him some races in the 200 pro class. tc does give the top national guys a different engine compared to the amatuer guys. that mite have been why your held up real good.

[CHAINSAW]

Im throwing the idea around of trying this head that I have on a 2 stroke. I dont really wanna try it on one of my machines though.. lol Someone with a Tri Z around here needs to meet me sometime so we can try it out.

[slippy4]

well, it looks like it has been used before, so it must work.... at least enough to get it dirty

[CHAINSAW]

yeah he built it and used it.. said it didnt help at all though. It would still be cool to try it once. :)

[mudduck14843]

i think i need one for my 200x deffinetly how much i already got a head to use...