ok, so now which one of those photos is the original and which is the photoshopped one? 
:gay: ???
Jason:
I appolagize for dropping that bomb and leaving you hanging. I had a tranny project take up a huge part of my weekend; P73 + YS1 cable casing = Cable Type R tranny :-O.
To answer your question first, I’ve seen piston and valve clearance issues, but only on milled heads.
The best way I can explain this to your self, as well as others, I got some emails asking to keep this explanation simple, would be to focus on the very specifically designed dome of the PCTs. The valve layout and combustion chamber are so different between a PR3-head(Vtec) and LS that the additonal compression that should be generated and combusted in a single stroke does not burn nearly as quick in an LS layout. In other words, static compression! The PCTs need the 3 degree layout(valve angle) as well as a hole lot of air to push. Remeber that one of the little none reasons PCTs don’t do well in stock P73s(ITR) is because both sides of the head are not ported, like the Civic type R.
The dome of the PCTs COULD be manipulated to work out well with an LS, but after all that it would be a lot more trouble then its worth. I know that for high comp LS setups JG has a ton of options. Considering your goals I would get away from the factory parts unless your going to go with something simpler; P73AOs.
Let me know if any of this makes any sense, its just my.02 from what I’ve seen,
J.
very informative information, indeed. thanks j.
J - Yeah, it does make sense. I see what you are saying about the valve angle… Basically, the angle that the valve moves in the head is different on the LS than on the VTEC head… I will have to do some more research into this and see what I can find out. Thanks a lot for speaking up and letting me know of this little setback. Hopefully it will work fine since I dont plan on milling my head at all. 11.45:1 is good enough for me. I dont want to overdue it since I am going to be running pump gas…
If you find out anything more on this, please let me know in either this thread or by email at mynameisbr1@attbi.com
Later,
BR
Originally posted by 4drB16
[B]
[/B]
We have to keep photoshop out of the peanut gallery.:mad:
Leif
Originally posted by leifintegra
[B]
We have to keep photoshop out of the peanut gallery.:mad:
Leif [/B]
Ummm, you guys are crazy and Ryan is gay. Where the hell did you find that picture at?? Something that is on your desktop :shock:
Later,
BR
Where the hell did you find that picture at?? Something that is on your desktop
I got that pic from phil…
Originally posted by 4drB16
[B]
I got that pic from phil… [/B]
Ahhh, that makes sense. I hear he swings that way… 
It sure is easy to pick on him when he isnt around to defend himself
Later,
BR
Originally posted by .J.
Holy Jeeeeezz:
Jason, don’t do it! I’ve seen some baaaad things happen with CTR pistons in LSs. I agree with you on your estimate about your compression but its not going to be consistant! Those pistons in that engine act CRAZY!!! Those domes were designed for high RPM usage with a much better rod ratio then in an LS with an LS head…I’ve seen this alot lately and most LS guys end up settling with a set of USDM type R pistons .25 over. It tends to yield a much more consistant power band. With the right head and cams mid 160s should be possible with the P73 AOs, but your playing roulette with those CTRs.
J.
Hey .J.
I have been doing much research and asking lots of questions and I finally found what I was looking for. Someone running the PCT pistons in their LS WITH a dyno plot. Check it out…
They were running I/H/E, crower 403’s and PCT pistons in a 96 LS and those are the numbers that it was putting out. Pretty impressive to me, but I would really like your opinion on it.
I know that you know your shiz when it comes to honda’s so your input is always welcome.
I think the only problem that I may run into is pinging in some areas (octanes & elevations) due to extremely high compression. But that isnt anything I couldnt fix with retarding the timing…
Later,
BR
Jason,
The graph is not showing up for me, could you send me the link or leave it here. I’m very curious to see what you’ve found.
J.
Originally posted by .J.
Jason,
The graph is not showing up for me, could you send me the link or leave it here. I’m very curious to see what you’ve found.
J.
.J … rightclick properties (anglefire doesn’t allow linking)
(you may need to cut and paste it)
edit: i’ll just host it:
<img src=“http://students.washington.edu/locdaddy/lsctrpistons.jpg”>
Thats weird… I can see the one that I posted and it is linked to the angelfire site…
Oh well, thanks for getting it up for everyone that cant see it, Tony.
Later,
BR
You guys can get more info on it at this link. It is a thread on honda-tech that I finally got some replies to and where I got the dyno. It also explains what each car had for each dyno run a couple posts down from the dyno.
Later,
BR
Originally posted by B R
[B]You guys can get more info on it at this link. It is a thread on honda-tech that I finally got some replies to and where I got the dyno. It also explains what each car had for each dyno run a couple posts down from the dyno.
Later,
BR [/B]
hey jason, when were you planning on dropping in these pistons? In a month or so, I’m planning on putting in my pr3 pistons and getting some minor work done to my engine (no full on port polish or anything)… where were ya gonna get it done?
Originally posted by 92GS-R
[B]
hey jason, when were you planning on dropping in these pistons? In a month or so, I’m planning on putting in my pr3 pistons and getting some minor work done to my engine (no full on port polish or anything)… where were ya gonna get it done? [/B]
I am not going to just drop them in. They are going into the motor that I am building on the side so it will be a while until they are on the street.
Considering the fact that I am in no hurry to build it and I am always on the lookout for the best deals, I will be taking my time and being patient and doing all the research that I can.
I figure that I will be getting it in sometime next spring, maybe. It really depends on what happens between then and now. Hell, if I can get another big contract for work I could get it in by the end of the year.
Later,
BR
ARCHIVETHIS
Too much good info to get lost in the never ending streams of data…
Later,
BR
Jason,
What rods do you plan to go with?
s’funny, Ive wanted to go with CTR pistons but they were back ordered… If you end up not wanting those CTR pistons you could trade him, he ended up getting JDM ITR pistons and he hasn’t used 'em yet… they’d probably be more stable in your LS from what J. said, and Ive’s building a b17 so he could REALLY use those CTR pistons… dunno just a thought!
teg92 - I am going to shotpeen my stock rods and have the pistons pressed onto those. That is of course after I have them shaved so the pistons will fit and then balanced…
smokInteg - I am going to be using these pistons for sure now that I have found someone else running them successfully in their all motor LS.
Later,
BR