like title says its 99 jdm itr, i got numbers 265across the board. I'm very happy with the results also thinking about taking it to dyno any suggestions. Comments are welcome enjoy...

 

Bumpp

 

I dont really understand what you're trying to get out of this thread. Clue me in. All I see is higher than average compression numbers for an itr swap. Am I missing something?

Congrats on having a very healthy motor? Sorry dude, I dont really know what your getting at.

 

I just wanted it to share, if you dont like it my thread I can't convince you.

Thanks that's what I think it an healthy motor for 12 years old. Should I dyno tune it or leave it stock with an Itr ecu, I'm running p73-003.

 

Gotdamn!!!! good ****!

 

Thank you lol I had same reaction when I saw those numbers. I did search and most Jdm Itr numbers I saw was lower then 220, i decide it to do my 99 Itr and result were impressive.

 

Now I understand why you posted it. Thats damn good for a 12 year old motor. I kinda figured it was freshly rebuilt or something. Now thats impressive. That motor must have been very well taken care of. Good stuff

Sorry if I came off like a douche at first, I see so many useless threads I just kinda figured this one was par for the course. Good stuff though.

 

Oh and as far as tuning goes, if the motor is stock, just run a stock ecu.

 

1) Compression testers are all different, that's great that you have similar #'s across the board, but the number is pretty irrelevant. You can have a brand new motor with no miles with a different compression tester that shows lower compression. Why everyone jumps all over compression test #'s is beyond me.

2) Leakdown would do a much better job of telling you the health of the motor.

3) If you are going to the dyno, it's only useful to compare it to other cars on the same dyno. Again, different dynos read different, yahda yahda. Not good for comparing to other internet compression tests or dyno #'s.

 

Nah it's cool man I wasnt complaining, ya it's 99 I purchase from japan star Jdm motor depot. I dont think it's rebuilt cuz I can tell every bolt got green paint and never been opened or molested. I was thinking of tuning it but like you said leave it stock and run stock ecu.

 

Well compression still tells you If valve stem and valves are closing and seated perfect. Leak down test is still good but I dont have the tool lol

 

All very good points, but a compression test does can still serve a purpose to indicate cylinder balance/indifference, which is why Im sure you mentioned the part about him having similar #'s. IMO leak downs are always useful, plus its really easy on a Honda engine given you have the tools. Although some folks will tell you leak downs are worthless as well. It all depends on who you talk to..

BTW, higher than normal compression numbers (if the reading is in fact accurate) *could* be the result of something like carbon buildup. Also, as sort of a reference point, my extremely low mileage 97 jdm ITR engine read 240 +- 2 psi across the board using your exact same gauge.

 

As said above, if the gauge is indeed accurate, would indicate buildup of carbon on the tops of pistons and in the combustion chamber in head and filling the dishes on the valve faces. If I were you, I would borrow another tester from auto zone etc. And do another test. I would also run a couple of bottles of redline fuel system cleaner to get the carbon cleaned out.
If it is indeed carbon buildup, then a tune is a must as you must be running very rich to generate that type of buildup.