[The_EE]

Well, I figured since I did the timing again to replace the tensioner pulley I would go ahead and do a compression test as well to see where the engine sits currently with approx 40 miles on it, that is.... if it starts and does not destroy itself.

Well, as you can tell by the title, it didnt destroy itself so I got the test done. I warmed up the engine to operating temp and then shut her off and pulled the plugs.

I am going to be providing pictures of the plugs as well, first two from left to right will be cylinders 4 and 3, the second picture from left to right will be 2 and 1. They all look fine to me but I dont have the most trained eye.

The cylinders came back with pretty much all the same compression numbers. There was a very very slight difference in cylinder 2 but I think I may have turned the motor over a little more than the rest. Its kind of hard to see the tester when you are turning the car over and you have no one to help.

I am assuming the low numbers is because of the low mileage on the car and I have not had a chance to do the 3rd gear pulls needed to do the final stage of break in. Again, only 40ish miles have been put on the engine so far since I finished it.

Cylinder 4: 135
Cylinder 3: 135
Cylinder 2: 137
Cylinder 1: 135

 

[The_EE]

I didnt let it idle on initial start up. I reved it to 2500 rpms for about 10-15 minutes and then drained the oil. I also have not been easy on the motor. I have been doing 30-60 mph and letting the car engine brake itself down on the way to work and on the way home from work when I did drive it.

I did not, however, do the compression test at WOT. I just turned the car over.

I didnt know there was a difference. I did the test with all the plugs out of the engine as well to make the cranking easier.

 

[The_EE]

After a 200 miles my compression was around 140ish in all four and it is now(15000miles) up to 160 in all 4. Be optimistic and hope for the best. Make sure to pull the mpi fuse and full throttle while turning it over.

Exactly which fuse is the MPI fuse on a 2g? I just pull the fuse for my rewired FP but that requires I remove the Neg terminal and then reload everything to the ECU.

I will do another compression test tomorrow at WOT.

 

[The_EE]

They are 8.5-1 Ross pistons.

 

[The_EE]

Redid the test

4:148-149
3:146-147
2:142-143
1:148-149

About a 15 psi gain doing it WOT.

Should I be worried about Cylinder 2? It was the highest and now its the lowest.

I also took the car out to do a little pull and the damned thing went to about 22 psi when I let off. The thing sky rocketed so damned quick. I did what I always do to set my MBC to 14 psi and this time it didnt work. I took it apart and the ball bearing was sticking to the nipple, it had a little grime holding it on, I cleaned that, reset the MBC and turned it down a little so hopefully I wont get over 13-15 psi on my next pull.

 

[The_EE]

Well, I was having a little issue with my turbo boosting to 25-30psi. Somehow the MBC was getting stuck so I took it apart and cleaned it and relocated where it was tapped to. I did a pull today and via DSMlink this is what it showed. I could not do a full pull due to traffic, just a small one but thats fine, its good numbers.

5327 RPM 317hp and 313.7 TQ at 17 psi, 11.8 AFR and no knock, 17.2 degrees of timing flowing 26.7 lbs/min

The car is holding steady boost now so I can do some pulls and really get that compression up there now.

Really need to get myself on some pump gas in the car hehe. Drove it to work today on 110. Been lazy and have not drained the tank.

 

[The_EE]

HKS 272's are currently in it, thinking about saying F it and going with some 280's.

 

[The_EE]

Guys seeing better results faster are speeding up the break in process. I call it forcing break in. They will see good results but if you plan on pulling lots of miles out of it and you seat them slower than you will see more in the end. If you rebuilt your head it will take time to seat the valves as well. Oil consumption during break in is normal as well. Put 10000-15000 on it will be better. I suggest checking out AMS overstock part of their website if you need HKS 280's.

Well, a friend is wanting to go with HKS 272's so I am thinking of just letting him buy me 280's and I will give him my 272's.