A first gen b16a with CTR pistons running 175 all across all cylinders. Is this good? Or low? Thanks

 

It isn't bad. Are you hold the throttle wide open when cranking?

 

That's low I get 250-270psi with CTR cams and pistons, is the engine warmed up?

 

I think that's a bit low... I got 210-220 across the board dead stock, and my brother's B16 got 220-230 across the board dead stock also.

 

what is the compression ratio with CYR pistons in a b16?
anyone know?

 

The compression ratio calculators will tell you 10.8:1, but the people on here who know thier stuff will tell you 11:1 or 11.1:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">I think that's a bit low... I got 210-220 across the board dead stock, and my brother's B16 got 220-230 across the board dead stock also. </TD></TR></TABLE>

220-230 psi is the norm for b16s

 

AHHH! So im guessing I shouldn't purchase this block then. I have someone selling me a block with 5000km on it and claims it has ctr pistons in it. I haven't seen the block yet. The block is in the car and he says that he drive the car around with me in it to show me it runs fine. I will be checking it out before I purchase it. Is there anything I should be looking for? And what could cause such low compression? Can it be maybe there is NO ctr pistons in it? Thanks guy for all the help.

 

The static compression of a B16A motor running PCT slugs should be the same or very close to that of a B16B; same bore (81mm), stroke (77.4mm), headgasket (assuming OE 0.029"), PR3 cylinder head (CCV = 42.70cc), in a block that's 7mm's taller running longer rods which makes no difference on the static C/R (only dwell, etc.) I still say ~10.8:1... B16A2 std. = 184psi, min. = 135psi, max var. = ~28psi Running stock B16 cams will bump that up a bit if running PCT slugs... ITR/CTR cams will drop it back down a bit... Remember a compression gauge is measuring the dynamic compression... Peace