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Old 09-19-2010, 11:56 AM   #1
seanathanq83
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Default Finally starting to look at engine parts

ok well i am finally starting to collect stuff for my v8 207 motor, now first this is going to be piston, thinking about 4032 because im not going to alot of power, maybe 400, but it will be higher boost because i will be running e85 most the time, but also 93 just depends where i am at. now i want to run around 9:1-9.3:1 yes i understand at these CR's i wont be able to run as much timing, i tune my own car so im not so worried. so my question is where can i get pistons with this CR??? will they have to be custom??? i think they will just be drop in, i will be getting the block checked soon, but walls look good just need to make sure its not ovaled.
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Old 09-19-2010, 01:31 PM   #2
john 1badSTI
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I think cp has ots pistons that are 9.0 to 1 for the 207.
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Old 09-19-2010, 03:49 PM   #3
seanathanq83
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Sweet thanks I will look
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Old 09-19-2010, 08:41 PM   #4
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started looking, and i only see 9:1 for 2.5 this is a jdm 2.0 liter, anyone else know of anywhere??? also since i will basically be building this for DD would it hurt drivability if i go with +1mm exhaust valves??? the heads have already been cleaned up a little over the big port they already are.
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Old 09-20-2010, 05:39 PM   #5
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anyone else????
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Old 09-21-2010, 10:40 AM   #6
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You might as well just stick with rebuilding the block. Your heads are prob not a restriction if your still using the VF37. Just put some std comp 2.0 cp pistons in and you should be good to go. You could run the 9:1 but you might get some det on the high end of the RPM with 93 but e85 should be good...

Im not an engine builder but thats what I would recommend.
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Old 09-21-2010, 11:26 AM   #7
seanathanq83
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well i dont race much, and will be changing out the turbo prob to a borg s200sx which is twinscroll, but i really do alot of driving in the city and its stop and go so i want the better out of boost power, i have been looking and the offer OTS for sti with 9:1 and every evo is 9:1 and i know with the avcs, and the ported ver8 heads and bigger valves i should have a better ve to keep knock away, but i just cant find alot of info on it. i am gong to atleast keep stock compression which is 8.4:1 but would really like more city driving power and when i run 93 the power and boost would be turned down so as to keep det down
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Old 09-21-2010, 11:27 AM   #8
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http://realstreetperformance.com/store/

These guys were really helpful to me when i was building my block...hope this helps
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Old 09-21-2010, 11:29 AM   #9
seanathanq83
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Quote:
Originally Posted by al82 View Post
http://realstreetperformance.com/store/

These guys were really helpful to me when i was building my block...hope this helps

thanks i will def get in touch with them when i get some free time today or tomorrow and see what they say, is there anyone running 9:1 that can tell me how there car is reacting to the change in CR
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Old 09-21-2010, 12:08 PM   #10
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Quote:
Originally Posted by seanathanq83 View Post
thanks i will def get in touch with them when i get some free time today or tomorrow and see what they say, is there anyone running 9:1 that can tell me how there car is reacting to the change in CR
a bit more responsive off boost compare to a dog 8.0
that's about it IMO
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Old 09-21-2010, 12:46 PM   #11
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Quote:
Originally Posted by john 1badSTI View Post
I think cp has ots pistons that are 9.0 to 1 for the 207.

agreed
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Old 09-21-2010, 01:37 PM   #12
seanathanq83
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Quote:
Originally Posted by mrboost03 View Post
agreed
Part number. Or link???
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Old 09-21-2010, 02:02 PM   #13
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http://www.cp-carrillo.com/LinkClick...30%3d&tabid=64'

pg 16


However i see no listings for a 9:1 EJ207 piston
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Old 09-21-2010, 03:58 PM   #14
seanathanq83
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Yea no 2.0 ones that high, anyone else??? I may just go custom so I can get a good quench pad, and make sure I have the valve reliefs I need
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Old 09-21-2010, 04:05 PM   #15
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i think jscspeed.com my have them?
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Old 09-21-2010, 05:36 PM   #16
seanathanq83
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I will check out there too, I just don't know any company who makes them for the 2.0 guess we are a dying breed with everyone wanting 2.5 and all
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Old 09-22-2010, 10:25 AM   #17
seanathanq83
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Ok well does anyone recommend a brand to make custom pistons???
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Old 09-22-2010, 10:02 PM   #18
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i would have figured more input???
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Old 09-22-2010, 11:26 PM   #19
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Depends on how far you want to take it. JE has the billet pistons, the fsr's, if you want to take it that far. CP will make you a custom piston too. Expect a 2-4 week lead time when ordering them, though!
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Old 09-22-2010, 11:37 PM   #20
seanathanq83
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not really worried about time, i have had this engine sitting bagged up dissembled for 2 years now was reading about the billets and fsr's and herd the fsr were cracking but not untill around 600 and im only shooting for ~400 max. may just go through 3MI on a set that way i can get them custom and hopefully it will help with the swirl and burn especially with the higher CR i see others with higher CR just dont know where they are getting them
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Old 09-25-2010, 02:00 PM   #21
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Quote:
Originally Posted by seanathanq83 View Post
Ok well does anyone recommend a brand to make custom pistons???
cp pistons give raceeng.com a call they can set you up
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Old 09-25-2010, 02:19 PM   #22
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I'd say cp, their customer service and tech help is awesome. I got to talk to the designer for the ej257 pistons and he was great help
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Old 09-25-2010, 07:24 PM   #23
seanathanq83
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I just picked up a full set of +1mm ferrera valves so that will be another thing, making sure with avcs I wont hit the piston
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