Ok heres what I got. Letting the compression build up, I got 105 psi on both rotors. Letting the compression bleed off after every stroke I got 45 psi. From what I read, thats pretty good. Am i right?

 

Go here....

http://2ndgenrx7.freeservers.com/cgi...mpression.html

I get three equal bounces of 95psi each in both rotors (check valve removed per article).
140K miles NA

 

Well, I got 3 bounces of 105. What is perfect?

 

105 is pretty good considering the 87-88 turbos are the lowest compression rotarys. I think I got about 100 on mine with 90,000 miles. my friend with 2000 miles on a mazda rebuild got around 125-130. can't remember, that was a 90 t2.

of course every gauge is different.

 

Its a Jspec. Should I be comfortable upping the boost on this? With the right fuel mods of course. Right now I have RB 3in Turbo back, RB FCD, and Walbro 255. I have a K&N adapter and cone, but im too lazy to put it on. What should I consider when upgrading the turbo? Can someone suggest a timeline of parts to upgrade?

 

The compression numbers in my GTU were 80 and 85 before it died.

I have yet to check the compression in the convertible because it still starts strong and gets great gas mileage. That and there's only 40k on the engine, so I don't feel the need to.

 

well what are you boosting now??

 

I believe 6.5 or 7

 

7psi with a stock wastegate and the RB Turbo back is unheard of. Either your turbo is just about shot, or your boost gauge is way off. I hope you're not looking at your stock boost gauge, because the FCD will throw it off. 99% of the people with a turbo back exhaust boost at least 10psi with creep up to 11 or even 12 psi. Better figure out what's going on first...

Your next mod should probably be an intercooler. I can hook you up with something cheap if you want.

 

Well, I ran out of that plastic crap they gave me with my boost guage, so I continued with silicone hosing, If you know what I mean. I heard the wastegate limits the psi in 1st and 2nd gear, thats when I was looking at the guage. I didnt check it in 3rd, and never really drove anyplace that would enable me to open it up in 4th or 5th. Maybe thats why I think its reading low. Theres no play in the turbo.....