Also, he is probably running methanol or race fuel … that bumps his HP numbers alot … I want to know how long that block lasts …
RPS built motors make 750hp on methanol … from what Eric told me. WAY overkill.
i’m a mechanical engineer student at walla walla college, in WA.
we just happen to have a nice auto shop here with a dyno 
and since i’m friends with the shop teacher, i got access to it whenever i want
i took his machining class, and its really come in handy, made a custom fuel injector rail for my dads Suzuki LT500. btw, my dad runs it on Methonal, a 575 cc single cylinder on methonal injection (mechanical injection unit with 52mm TB), its putting out about 105 hp to the wheels.
gotta love those 2 strokes.
here’s a link to see more of the ATV stuff.
Originally posted by redlineintegra
these sleeves looks like they might create some heat problems … the coolant tracts are not as efficient as the GEM design … but the O-ringing should help to solve the sinking problem.
I don’t think there is any question that the sleeves/turbo will create more heat, but proper tuning and the right setup will allow the motor to survive. I don’t think anyone is going to consistently run 35psi of boost …
The picture of the block on the left are darton sleeves which makes the honda block a closed deck, They’re great sleeves and have enlarged holes but it’s still a closed-deck just like the old B21a(had overheating issues).
O-ringing is just to give a better seal against the combustion chambers, that is all. GEM offers a option of what they call a step deck. They mill the deck a little and have the sleeves stock height so they sit a little higher and give extra crush against the head gasket instead of using an o-ring.
Also u mentioned cylinder sleeves tend to sink? I’ve never heard of that before. But if there was such a thing as a “sinking problem” then engines would running all kinds of different compression ratios. haha 
I always thought that the idea of Honda builduing the ‘floating sleeve design’ was due to the absorption of viberation at high Rpms. That and the great cooling effect it plays on the engine. so for a higher reving engine, bigger sleeves wouldn’t be that bad then… just don’t stiffen the top end with some kind of support? And I thougt that the reasoning behind stiffening and reinforcing the top end of the sleeves was for the people who apply a higher compression. A slightly higher compression engine with high revs wouldn’t bennefit much from a support on the top of the sleeves right?
These are my thoughts and ideas… someone please elaborate on them.
u mentioned cylinder sleeves tend to sink?
Yeah, I have talked to a few shops, and they have all mentioned it happening on the T-style sleeves … so I assume it is something that happens with the T-sleeves (not so much with the individual cylinders) …
aftermarket sleeves for an all motor application is just overkill.
Unless your trying to make an all race n/a motor with something like 85-86mm bore but you would run into other problems.
Ray, what other problems would you encounter with 85-86mm bore?
about sleeves sinking, i am still learning about the honda block,
but on my suzuki lt500, we had problems with sleeve sinking until we added the “T” or lip that kept it from going down, we machined the cylinder to allow the sleeve lip to seat properly.
the honda open deck doesnt have a place for the sleeves to sit in.
when i pick up my extra block, i’ll have to inspect it carefully to see exactly how the sleeves mount in
unless someone has some pics from the bottom side i could look at now.
GEM sleeves also have the “t” machined into the sleeves to prevent them from sinking.
mmmmm I love this thread even more now!!!
so how would i get in touch with these GEM guys? TIA
Can someone archive this>>>>>
lots of turbo info here … be good to have around when people start a build for FI
sell your integra buy a 240, swap an sr20 motor, block is SOLID already and capable of handling 400 horse with stock internals!
Ummm … I ain’t buyin no Nissan :dead::dead: … INTEGRA BUILD …
Originally posted by AMERIKAN
mmmmm I love this thread even more now!!!
Why? 
Leif
What happened to Amerikan’s dyno post?