mongruel getting a 86 1200 engine added to the bloodline

[backlander]

:doh: I know, you was just making sure the oil pump was working. :shock: :whistling: :Egyptian: :smilie_happy:

 

[slabghost]

Use whatever carbs you know work. That eliminates one variable. Then finish up the carbs you want and try them.

 

[joedrum]

okay big day today ...adjust valves ...time dyna ....fuel pump....carb rack install ...radiator install ....air box install ...and then tiime to test ...lots on the plate not sure how much ill get done ....have camera will pic :mrgreen:

 

[mcgovern61]

okay big day today ...adjust valves ...time dyna ....fuel pump....carb rack install ...radiator install ....air box install ...and then tiime to test ...lots on the plate not sure how much ill get done ....have camera will pic :mrgreen:

Aggressive schedule Joe! :shock:

 

[ekvh]

I am looking forward to hearing of this being a success. Take your time.

 

[ekvh]

I measured the combustion chambers of my 1000 heads for the umpteenth time last night. I can't see how this isn't going to be a compression increase. I will measure the 1200 heads again tonight. The only question for me now is whether to have the heads shaved a bit. If I do, I'll have to check valves clearances again. I am worried about getting more compression than it will handle.

 

[AApple]

opcorn: opcorn: opcorn: :mrgreen:

 

[dan filipi]

I measured the combustion chambers of my 1000 heads for the umpteenth time last night. I can't see how this isn't going to be a compression increase. I will measure the 1200 heads again tonight. The only question for me now is whether to have the heads shaved a bit. If I do, I'll have to check valves clearances again. I am worried about getting more compression than it will handle.

Might be worth it to put the head on and do a compression check or is the concern of too high compression ratio?

 

[ekvh]

I went home at lunch and did a recheck of the 1200 combustion size and I think I miscounted when filling it the first time. I have a 3 cc syringe. At noon today I got almost exactly the same measurements as Superskypilot did. The only bump in compression would be from the 1200 piston coming out of the block a bit and the 1000 piston staying in the block. Using one compression calculator it still shows a static compression of near 12, and over 12. I am using 75.5 for bore, 75.5 for head gasket bore, 66mm for stroke, 33cc's for combustion space, 7.8cc's for dome of piston, 0.040" for compressed head gasket. Anyone have different numbers than I am using?

 

[joedrum]

well got the dyna timed then looked at exhast ...its an old 4 into 2 jardine exhast ...its crao in the back so had to pull apart ....and now the rest of the day is all rough cleaning the exhast

imust be movin just a bit shaky ..pic of tool ...big varible speed drill with trigger lock and dial speed adjuster ...with wire brusch in it

pic of pipes two on top have had some work 2 on bottom were the best pipes of the bunch when untouched ....flamges amd all need lots of work ...pipes too ...surprisingly good shape since they were in junk yard forever ...the pipes were scrape bad from fall or corner careing righ on the edge of not useing ,,,but ive seen stock much worst :mrgreen:

they seem plenty long not hurt anything and i think rather easy to finish out .....ill probably go tight ...low ....and all the way to the back as far as i can to give some back pressure and start from there and see how it dose

 

[dan filipi]

well got the dyna timed then looked at exhast ...its an old 4 into 2 jardine exhast ...its crao in the back so had to pull apart ....and now the rest of the day is all rough cleaning the exhast

imust be movin just a bit shaky ..pic of tool ...big varible speed drill with trigger lock and dial speed adjuster ...with wire brusch in it

pic of pipes two on top have had some work 2 on bottom were the best pipes of the bunch when untouched ....flamges amd all need lots of work ...pipes too ...surprisingly good shape since they were in junk yard forever ...the pipes were scrape bad from fall or corner careing righ on the edge of not useing ,,,but ive seen stock much worst :mrgreen:

they seem plenty long not hurt anything and i think rather easy to finish out .....ill probably go tight ...low ....and all the way to the back as far as i can to give some back pressure and start from there and see how it dose

Wow, about the only thing I can make out in that first pic is the lid to a barrel and even that I'm not sure.

 

[joedrum]

well thats cause i didnt really want to show my secret weapon tool exhast cleaner ...it did well its clamped in the small metal cutting brandsaw...hmmm didnt get the five gal predission bucket i sat on sheeesh with out that i woulnt have been done yet ...my back would be out ....i got one side snuged on ....they will be like double barrle shotgun looking to the back if i stay with them .....i like to try the four into four exhast no guessing on what cylinders are doing that for sure ...amyway im glad to be pass exhast for test ...not bad at all and rough cleaned rather good

 

[ekvh]

Dan, I don't mean to be butting in Joe's thread, but we are both doing the same mod with the heads. I'm just way slower. I am wondering what kind of static compression can be managed by these engines. The calculators all come up with near or over 12:1. I hear that's good for umph but probably will ask for more expensive fuel unless I went E30. The dynamic compression is coming in around a point lower and if it's too high I could go with 78-9 cams to lower it some more and feed it more on the intake. I don't know what's a safe amount. I thought 12:1 was getting pretty high. The biggest gains between the two engines besides displacement will be from around 0.060" more piston lift. The 1000 stays down in the both about 0.020" on my 1000, and the 1200 comes 0.040 out of the bore. I'm looking for advice on what's a manageable compression ratio.

 

[joedrum]

my gut feeling is its not going to be that big a deal eric on compression ..it all seems to close to me ...the cams will be huge ...the carbs ...and the bigger itke valves in the head ....i thinking were talking two different setups that will and would work on either motor ...meaning the 1200 heads and carbs on 1000 ...i think that honda tried it best to make a high torque low rpm motor out of the 1200 and droped it rpm carb size valves change and all ...to get that honda had to go to the six cylinder 1500 you cand get all kinds of pull out of a six...the 1200 is a natrual mid rpm torque machine in todays standard of rpms in the 10 to 15 thousand range ...

im thinking the 1000 set up on the 1200 is totally doable in the all stock range for sure ...im confident if this motor is sound this bike will be awesome and stay together well with little tweaking to get it right ....its great to me to have a 1200 set up that can run on point or dyna just like the 1000s ...and the biggest deal will be the gearing spread to match the power ...and the lower final that will make the cam even happier ....cant wait to test the motor it will be soon it seems :mrgreen:

 

[ekvh]

I hope you get it going soon. If the compression is high, a good spark will be key to it running well, along with higher octane. I'm thinking Dynas should be enough.

 

[ekvh]

Do you have a compression tester? I know you probably need to run the engine a bit for rings to seat, but it would be neat to know what you get for readings, before and after.

 

[joedrum]

no i dont eric ...well today ill get really close id say if i stay at it today ...

 

[AApple]

opcorn: opcorn: :read:

 

[joedrum]

okay the first of the day i had to invent a spliting cage for wood ..to make it safer for the grandson ....it work well ...i like it

well valves adjusted ... retorque heads as good mesure to 40lbs plus....installed headers....1100carbs and fuel pump ready to install ...and radiator its guys company came over and stop me here :mrgreen:

 

[slabghost]

Alrighty then getting close!