Meh, I don't forsee sleeves ever rocking below some outrageous HP number, on the order of 600+ hp. For a street car I would go open deck all the way. The cooling characteristics, and the free reign for the entire sleeve to thermally expand will lead to a long happy street life.

If you want to run a closed deck sleeve for a drag monster, I think that is fine too. But the sleeves will have the ability to expand at the middle of the cylinder (where sidewall loading is at it's greatest), and will be pinched at the top.

-PHiZ

 

I've talked to MANY people running with block guards and sleeves that act as such. The only ones that have had cooling problems are the ones where the guards/sleeves weren't properly installed.

I will obviously be doing more research, but I will probably go with a guard this time.

 

You keep going with that theory, I'm sure your vast engine building experiences are helping you out there .

There are plenty of blown headgaskets on turbo setups that are so far away from your magic 600 mark that it actually makes me laugh that you think stock sleeve design is infallible until "some outrageous HP number". There are 2 things that cause blown headgaskets, and they are detonation, and cylinder walk. The former more than the latter, but cylinder walk can/does play a role on hondas above 250-300 WHP.

Also, honda block designs mean that the sleeves are quite well supported along their entire length. If you get a sleeve to bulge in the middle, it's because you have a piston/rod sticking through it, side loading wears on the piston as much or more than it wears on the cylinder. Also, to say that a sleeve would "be pinched at the top" because of a closed-deck design would be ignoring the fact that the top of the sleeve is not exempt from the thermal expansion of the rest of the engine.

A proper cooling system [higher capacity radiator, more efficient fans, etc.] for the application will also negate any shortcomings a turbo honda would experience with an otherwise stock cooling system. Just because there seems to be less area for coolant to flow, doesn't mean it can't do as good a job, it just means other shortcomings of the cooling system are exposed.

 

overheating will also cause the headgasket to go, but I know you know that Harry.

what can be done to protect against detonation besides racing fuel?

 

Overheating causes the head and block to warp, so even then the cylinder and head are moving in relation to each other.

To prevent detonation, tune, tune, tune.

 

Ah, ok. After thinking about overheating that makes great sense.

A guy I work with was telling me that someone had recently created some kind of device that has a 100% prevention rate for detonation and it won't get used up or need to be replaced. They've mainly been targeting the RX7 crowd, but are saying it will work with any motor. I'll see if I can find a website or something and post it up. It's somewhere in the neighborhood of $400 and they won't release its workings until their patent has been approved. Also said to have proof that it works as well as they say. I keep hearing the 'too good to be true' line in my head. :happysad:

 

First off, anything claiming to be 100% anything, is rarely ever true.

The only way to prevent detonation on an engine 100% of the time, is to never run it.

 

:chuckles:

true... very true. I'll get that documentation up when that guy gets here.

 

I work at AJS Engines in PA we can put dartons in your block for you, darton gives you a blue print for all machine work, just and if u go big with the stroker your gonna need a deck plate.. I can come up with a price for you if u want.

 

Sure PM me.

Can you give me dealer pricing? h: