What compression before u need crank/head bolt upgrades?

[nakomis0]

What compression do you think you can run in a 440 before you would probably need FDO larger/stronger head bolts?

Do you think a 12:1 or 12.5:1 would be ok with stock head bolts.

Also same ?, but regarding the crank. How high can you go before that would become a concern.

Also if you run a 12:1 - 12.5:1 compression, how long have you had the setup and did you do any of these upgrades?

[shamisc]

I would never run over 11:1 with the stock rod! My buddy put a 12.5:1 426 in his about 3 months ago, and low and behold, the rod was slapping the starter last Saturday! :( Poor guy! I told him to stay below 11:1 !

[RideRed400StYlE]

I run a 13:1 JE 426, I upgraded to a Carrillo Rod. they are the strongest out there and are worth the $$ spent.

[nakomis0]

Whats the approx. total cost to install a rod?

Can ya split the case yourself?

How about those head bolts? 400Style, you got stocker head bolts in that 13:1?

[nakomis0]

Wanted to post this info for others....

Nakomis0: hey i wanted to ask ya how much that Rod cost and if you installed it yourself
Magna2001: you cant install it yourself because on the 400ex you need to press the crank apart and put it in and true it up and press it back together
Magna2001: I had GT thunder do everything
Magna2001: I split the cases and took the rod and crank out and sent them to him
Magna2001: took about a week to get there. and a week and a half to get back
Nakomis0: ahh ok, so do you know how much it was for them to just install the rod.. or even an estimate?
Magna2001: I think it was like $250 - 275 for the rod and to have it installed
Nakomis0: oh wow that aint to bad i was thinking like 500.... Do you still hjave stock headbolts..
Magna2001: nah, I bought them off of gt thunder too
Magna2001: they are like $80
Nakomis0: ok, thanks man I appreciate the info...

Thanks for the info 400Style

[400exstunta]

you could split the case yourself if you ahve the right tools. Unless you know what you are doing though I wouldnt recommend it at all. There are alot of things in there to be palying around with. Transmission has alot of very very small parts in it.
I would imagine it wouldnt be more than 300.00 to split a case, and then to install the rod, well thats labor costs and they vary from place to place.

[papaw]

i'll split cases and put it back together for 200 bucks.cannot do the crank work yet..fdo done my crank and have had no probs with it yet.runnin a 13:1 je 416 piston.....

[Steven]

I've been running 11.5:1 for a year with no problems. I did buy new OEM head studs though and taped another 3-4 threads out of the holes for more holding power. So far so good.

12.5:1 stock bolts and crank and still crossing those fingers for about 8-9 months :)

Thinking about a stroker and raising the comp some more and then I wouldnt think of not beefing it up, but till then its still a test of faith in Honda.

[shamisc]

Originally posted by RideRed400StYlE
I run a 13:1 JE 426, I upgraded to a Carrillo Rod. they are the strongest out there and are worth the $$ spent.

Man, You must have one kickas$ quad! How's the power with that 13:1 versus other bikes? I will probably eventually go with the Carillo, welded crank, and 13:1. I'm happy with what I have right now though. :D

[Chef]

I have been running closer to 14:1 than 13:1 for the last probably 4 months with no problems. Beef up EVERYTHING if you decide to go high like that. Mine is a 460, all piston no stroke, and it has had zero problems. My head work is more extreme than you are going to see from anyone else, which would relieve some stress on the crank and rod, but it is still a big load. Stronger head bolts, stronger studs, heavy duty cam chain, carillo rod. I bought a few rods and had them all flashed to see what one would be best, just to be sure. All of my stuff has been machined etc to extremely tight tolerances, as well. If everything is turning as free as possible, there is less of a chance for failure.

All of my stuff has been machined etc to extremely tight tolerances, as well. If everything is turning as free as possible, there is less of a chance for failure.

If everything was turning "free as possible" the tolerances would be considered "loose" not "tight".

[Chef]

Originally posted by 440EX4me
If everything was turning "free as possible" the tolerances would be considered "loose" not "tight".

You know what I mean. Its tight when its cold, gets some heat in it, the tolerances open up a little bit and there it is. You understood what I meant, just wanted to make me look like a jackazz, didnt ya? :blah: :scary:

Originally posted by Chef
You know what I mean. Its tight when its cold, gets some heat in it, the tolerances open up a little bit and there it is. You understood what I meant, just wanted to make me look like a jackazz, didnt ya? :blah: :scary:

Didnt even think of that originally but I was in a strange mood yesterday, and looking back now I did get a chuckle on all that, thanks :D