well whille i was over seas i had my block built and choose every thing i wanted from a reliable source. Now im getting everything ready to go to the tuner this week, and i do the basics to get her ready valve clearence, lift up the suspension, ECT..

When i stumple onto the compression check and read a perfect 150 psi across the board DAMMMM!!!

The pistons i asked wisco for where 10.2:1 i thought so now im sitting on a freshly broken in block with this. what do you think i should do? should i just get it tuned any ways and start building a second block?
i tried talking to the machine shop and (they ordered them) and they said they ordered correct so im not one to start a argument it is what it is trying to move on
heres a quick break down of my car

wiseco says they are 8.8:1 but i think thats a little to low ?


00 em1

b16a2
wiseco pistons 8:1 FML
eagle rods
oem bearings/ waterpump oil ect
sk2 inman, omni 70mm thl bdy
greddy 4core intecler custom 2.5 chrge pipes

presicion 5857bb .82 v/band
JDL top mount 3'' dp and all the back
precision 46 gated

walbro 255
rc 750
Hondata s300 and 3 bar


so is it worth keeping ? any ideas, thoughts, sorrows, appreciated.

 

You won't have much power down low out of boost, but with that turbo turned up it will still be a blast

 

More boost! Screw it i wouldnt think its worth it. I was going to build a 10.5 to 1 turbo motor until this 9.0 b16 fell into my lap for a great price.

 

its a little low BUT with a low compression motor and a REAL tuner they can add timing out of boost to compensate and it will have plenty of power out of boost and gives you a better resistance to knock with lower compression

 

This ^ especially on pump gas.

 

My motor is is also a low compression b16. The last time I did a compression test a few years ago it was 160psi. I've been running 18psi on my dd for 7+ years now. This is on a Drag manifold, .57/.63 Turbonetics that comes with the kit, ITR cams, Skunk2 valvesprings, ITR intake manifold, ITR tb, Hondata stage 4 (talk about old parts) and a Yonaka intercooler........



with the 35shot..........

 

get a thinner head gasket

 

Add boost and enjoy.

 

i refuse to use anything ecept the oem hg


well im surprised every one says i should be fine.
wont my possible power numbers go way down though?

 

well no because u can just lace the boost to it, you will notice its a little sluggish without boost but like turbo ls said a good tuner can throw some timing at it to help. your turbo should spool close to 4000 rpm anyway so i think you'll be happy. and u will less worry of detonation, should last awhile.

 

What are your power goals?

Just do some calculations, and see if the amount of boost your motor needs to run to reach your goals does not fall out of efficiency range on your particular turbo. Next is your fuel system, as you may need to size up if you intend to compare fuel consumption to regular folks with higher compression and making higher numbers on the same fuel setup.


If you are looking for 500+, then you may have some issues with requiring too much boost, and you'll end up with poor efficiency and the car will be sluggish everywhere (boost recovery, transient response, etc...). Since this is a B16A, it will need **** load of boost to hit higher power.

For low power, sub 400 WHP, then having such low compression is a lost cause either... It's not a "problem", but you are not getting the most out of your setup.

 

Before you freak out and start building another engine, verify your compression ratio.

 

as stated in my first post i have checked my compresion and it is 8:1

 

thanks for the comment as for power goals i have none just wanted something that would pull nice and its just a toy.
i would like to see 400whp though.

 

Low compression. a top mount and an 82ar.

How far along are you?

 

yeah those things dont match up very well. what are your power goals?
the engine itself will be fine but have a setup to match. swapping to a ramhorn/miniram manifold and a .63 ar will help.

as was stated, you can run more timing to compensate for the lower static compression. i did it with my vitara motor which had compression ratio in the high 7's. the compression check on that was 155-160 psi.

last question. when u did a compression check to get your 150psi, has the motor been run yet? without getting some miles on it the results will be lower

 

I have the same wiseco pistons for my GSR, and I thought the same thing I got worried until i drove it for the first time. The lag is not that noticeable out of boost and its perfect for daily driving cause im still getting 30+ mpg without mashing the gas too much. I do also have a 50 trim turbo which helps cause it starts to spool in the 2.5k rpm range. But I think your good man, just do like everyone said and take it get it tuned and turn up the boost and enjoy.

 

Again I have no power goal its just a toy..
Also understand they do not mix I did not choose the low compression
. No this was well after breaking in the motor and read the 150psi. All though the motor was cold could that have any effect I think not

 

What do you mean how far along am I?

 

Everything installed ETC.....

Sounds like its completed not much to do now other than get it tuned.

If you can find someone to trade manifolds and turbine housings that would help your situation. Even if your C/R would have been higher they are not ideal for the 1.6l.

 

You stated in your post Wiseco told you your compression ratio was 8.8:1. I'm talking about actually verifying the compression ratio by the measurements taken when it was built, ie chamber volume, deck height, etc.

 

Yea I honestly switched back to a .63 from the. 82 late last year and I couldn't be happier. Much better response and I am seeing a good 700 to 800 rpm more of full boost with a better powerband and more area under the curve