Engine need to be warm (operating temp) or cold (room temp) for correct #'s? As I don't have an ITR Helms, (only the Civic Si), what are the nominal compression psi for an ITR?

I have ITR block, Toda pistons, head deshoulded to give 12.0 to 1 compression.

Cold results

#1 225
#2 240
#3 230
#4 225

Shouldn't compression be in the 260's, 270's?

 

i dunno but just for comparison, my test, (warm) was in the 205-215 range

 

yes your numbers do seem a little low.

 

That's what I was thinking....kinda low. Oh well, I'll go take it for a ride and re-do it.

Anyone know what a code 21 is? Not in my Helms, anyone else?

 

its should be somewhere 230 to 235 psi nnnnononononoo 260-270 psi its can be done

 

Dont forget that the overlap on your toda cams will affect your cr numbers. Code 21 is vtec solenoid valve.

 

Sounds low to me I got 245-255 with MUGEN head gasket on my R.

 

B18C block
CTR pistons
Toda C cams

1. 295
2. 300
3. 300+
4. 295

Thats like a hair over 12:1 CR.

 

I just did it again with the engine @ operating temp and got;
#1 230
#2 240
#3 240
#4 230

Disabled FI
WOT
turn over about 5 secs.

 

seems rather low

 

I must agree, for a built motor your compression numbers are kind of low. If I were u I would get a leak down test performed. I have seen stock gsr's with 200 - 240 with stock internals, so u should be close to the 300 range.
Do a leak down test and see if maybe the rings u used are defective or worn out. R u burning a lot of oil? What rpm are you reving your car to?
EVIL

 

I'm burning maybe 1-2 qrts per oil change, depends if I auto-x or track the car. I take the car to 9000 rpms regularly.

Rings came with the Toda pistons. I have 14,000 miles since the build, I do need to adjust the valves...was planning to do it @ 15,000.

Thanks for the info everyone, anything else?