1314 cc cyl. questions

[Coronet]

 Thinking about buying the 1314 cc cyl that is in the for sale section and was wanting some input on any problems with running this on a street bike.
I have a 93 FJ with about 30,000 miles and was planning on putting the cyl. on it. I have a spare 1200 motor and was also thinking about pulling the head off it and having some port work done and installing it along with the cyl.
Would this give a decent gain in power and would there be any dependability issues, overheating ect.
Would appreciate any thoughts on this.
Thanks
Mark H.

[andyb]

Bigger motors generally make more power.

Depending on the quality of the work you do, it could lose some reliability.  It would also produce more heat for the same amount of cooling area.

[ccsct203]

the best thing to do is to upgrade head, cams, carbs, exhaust, ignition along with the 1314 kit.
just a cc increase will not give you near the benefits of all the other upgrades with the 1314cc kit.

[Coronet]

 ccsct203 that was the direction I was heading. Was planning on doing the head work and ign. maby change the cams. Plan on staying with the stock carbs.
Don't want to turn it into a "take it for a short spin on Sundays only" type of bike, been there done that (with cars). Trying to decide if the big bore cyl is going to be worth the hassel and expense, or would the money be better spent on other mods? 
Mark H.

[ccsct203]

added cc even going from 1200 to 1300 is worth it.
Don't forget the cr of your stock bike is around 9.5:1 or so.
My bike is a fj1100 with the wiseco 1200cc kit 10.5:1
I don't ride it near the speed I could with its megacycle cams, dyna 2000, mikuni flats, plus plus plus.
I did it more as a project.
Would I upgrade to 1314cc?
Yes.. I have the money and the know-how to buy the same setup.
Will I get much out of it?
Not really.
I have so many upgrades on my bike and it's not a point and click bike. I can ride it for hours and it is smooth, fast, handles great, upgraded brakes and bearable on noise levels.
I think a 1314cc with a 12:1 cr would be better but thats me.
Bottom line... sure buy the setup and use it as a part of your upgrade.

[Flying Scotsman]

Go big or go home lol.No replacement for displacement.
I have been doing it with 2 strokes for some time and you do definately feel the difference each time you increase displacement.
Big bores dont need to work hard at all but make crazy power when called upon gear it right and you will sip gas and destroy your rival's on the track.
I have two GP1200's (waverunners) and the one with porting raised comp and max bore is all I want to ride the other one has raised comp a smaller bore and no porting.
I say go for it if you change you mind and its too fast for you i would be interested in a trade for my 1100 motor.

[fj1289]

Mark,

The 1314 kit has no track record of being tempermental nor overheating on the FJ that I've seen.  Heat produced is directly related to HP made.  Cruising at highway speed requires the same power from the engine - whether 1098 cc's, 1188 cc's or 1314 cc's.  The larger engine will do it at lower throttle settings - and not make any more power or heat than demanded.  Parade speed trolling does cause the FJ some issues, but the 1314 shouldn't make it any worse - that's a low power situation caused by lack of airflow.  But even new water cooled bikes have that issue too!

Head work is always a yes!  I taked to SuperBike Mike several years ago about a 1314 engine.  He said a 1314 with a "stage one" head (ported for the street and still using stock valve sizes) with stock carbs and cams would put down about 135 HP at the rear wheel.  That seems reasonable compared to what I've seen from others on here.  Oversized valves and more porting will give you more, but requires a greater amount of care when putting the engine together - have to ensure adequate valve-piston clearances.  Been there, done that!  For my application I had to have the valve pockets in the 1314 pistons flycut slightly oversized to clear the oversized valves.  What cams and cam timing you use will determine if this will be an issue.  I haven't heard of problems when using the stock sized valves - but I don't have 15 years of experience building these things like Randy does either!  I would definitely seek his advice.

If you want to stick with stock carbs, I'd suggest stock cams and valve sizes.  If you're willing to run flatslides, then I'd do the oversized valves for sure, and cams depending on what you want from the engine. 

Speed costs money - How loud do you want to KOOKALOO?! 

[racerman_27410]

I'm currently running a 1349cc motor with zero overheating problems and as long as i stay out of the throttle i get about the same fuel mileage as a stock FJ (high 30's to low 40's).... of course when i hammer it i can knock that number waaaaaaaaay down... like the mid 20's   


the extra displacement means more torque and that's where it's at for street riding.


stay under 10.5:1 compression and you can run pump gas


KOokaloo!

Frank

[Dan Filetti]

I'm currently running a 1349cc motor with zero overheating problems and as long as i stay out of the throttle i get about the same fuel mileage as a stock FJ (high 30's to low 40's).... of course when i hammer it i can knock that number waaaaaaaaay down... like the mid 20's   

the extra displacement means more torque and that's where it's at for street riding.

stay under 10.5:1 compression and you can run pump gas

KOokaloo!

Frank

Frank-

Were you ever able to reinstall the flat-sides?  IIRC, they were causing some fairly serious issues that even the mighty Hank Scott was unsure of.  Or do I have this wrong?

I ask because, given the time, energy, effort, money and out-right expertise you put into Brutus, with a design principle that strongly included, even focused on longevity/ reliability, I was concerned when I read you were having serious running issues.  At the time I believe I remember you swapping back to closer to stock carbs in an attempt to get it right. 

I took from this that modifying your bike too far will inevitably? impact reliability.  I know, I know that's only an 'n' of 1, but it did stick with me.  If it's good now, I'd appreciate a debrief/ root cause report to restore my faith a bit.  If you're willing to share.

Thanks,

Dan

[racerman_27410]

Dan,


there was never any running or reliability issues.... the only issue we had was some bad rings letting oil out of the motor thru the exhaust.


they wanted me to run the stock carbs while the new rings seated in order to "potentially" avoid washing the cylinder walls with fuel during the process..... even though the carbs were tuned properly and i was and always have been getting good mileage (unless i hammer it and i guess this was the point in putting the stock carbs back on during the bed in process)


it's all good now and i am back on the FCR's and Brutus is mighty as ever. 

Too much is just enough

[Coronet]

  Decided to go ahead and buy the 1314 cyl. Had to give some serious thought about stepping off into that "modifications" black hole because I know there is no end in sight. 
Not going to get in any hurry to do this project. Want to get the spare head I have ported - still considering going with bigger valves. Any recomendations on a shop to do the head porting/valve work.

Thanks
Mark

[racerman_27410]

  Decided to go ahead and buy the 1314 cyl. Had to give some serious thought about stepping off into that "modifications" black hole because I know there is no end in sight. 
Not going to get in any hurry to do this project. Want to get the spare head I have ported - still considering going with bigger valves. Any recomendations on a shop to do the head porting/valve work.

Thanks
Mark

IMO staying with the stock size valves really boosts the torque of the engine and torque is king on the street.

Andy Y's big motor has larger valves and i get him out of the hole every single time. He makes more top end power but there is really no place to use that on the street without significant risk to your life and license.

[andyb]

We're talking about 145mph bikes in stock form, 0-100 in 7s.... they can already get you in trouble.  A little more won't hurt.   

[Coronet]

 Due to an unexpected financial issue I had to back out of buying the 1314cc cyl. and pistons.

Just want to say thanks to everyone that posted on this subject.

Mark H.