Originally Posted by
MugenR
High compression is good for boost, it just takes a little more time and money to make it run perfect.
Low compression is easier to tune and will probably be more reliable in the long run but there are many pluses to higher compression and boost.
I ran 10-12lbs of boost on my stock ITR motor for more than 24,000miles without a single issue. Given the USDM is 10.6:1 compression verses the JDM 11:1 compression.
I would not recommend running boost on 11:1 unless you know what you are doing otherwise it will put out some great numbers on low boost. Just dont let it knock at all. Invest in good parts and safety equipment and you will be fine.
A simple fix would to be get the JDM motor if your getting a good deal and put in some GSR pistons and sell the ITR pistons.
IF you need more info just pm me.
scott
absolutly correct, high compression makes great power when boost is thrown into the mix. but like stated in Mugens post, it takes a lot more TLC to make it run good and be reliable. you can do it. and using a type R trans mission with lsd will be great. short gears are awesome for boost, the tighter the gear, the faster you will speed up. all i have to say is use quality parts on your build and a great Engine managment system I.E Hondata S-200 w/ boost option and data logging. oh and to comfirm your way of finding out if its a real JDM R motor the head will have P-73 stamped on the front of it in one of the three information circles.
High Compression + Boost= good power and a lot of money invested.