hey guys,
i have a set of JDM b18cR cams and am wondering do i have to raise compression to fit them to a b16a head or can i leave my head stock.
thanks guys

 

You can leave it bone stock but if so I wouldn't rev more then the stock limit. Putting better head parts in will allow you to rev more as the cams will want more then 8200.

Comp ratio wil be fine. My head has CTR cams *near same thing just lil larger intake* stock head guts and I turn out to 8.5k much to the dismay of my valve train.

 

im running spoon ecu which crosses over at 5k and rev til 9k think it would last? im also running type r fuel system?

 

Bye Bye valves...

 

Why do toy say that. i stick stock ecu back or should i get b18 ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK Dave &raquo;</TD></TR><TR><TD CLASS="quote">Why do toy say that. i stick stock ecu back or should i get b18 ecu?</TD></TR></TABLE>
Because your valve train is not made to go that high....
You can take your damn limiter off and try to go to 11, the head is not made to go that high with stock parts.

Stock R fuel system = B series fuel system.

 

i could use type r value train and raise my compression to 11.1
but then would i have clearence issues?

 

speaking of reving high..... long sotry short, no rev limiter and went 3rd to second (on accident! guess-ta-mating 13,000rpm?) possible higher....... KABOOMMM!!!!!!

not thread jacking,. but gsr cams and b16 head

 

Using the ITR valve train won't raise your compression, but using ITR pistons will. If you're going to install ITR cams you need to install ITR valve springs and retainers. If you don't, one of your stock springs will bind under the higher lift of the ITR cams, you'll float a valve, which will smack into a piston, which will more likely than not blow the **** out of your motor. And your eBay "Spoon" chip is just adding too much fuel and timing. You'd be better off with the stock B16 program...or ITR when you install those cams.

I'm going out on a limb and saying that you need to do a lot more research before you start working on your motor.

 

i know im only new to honda,i was going to raise compression with a .4mm head gasket.i am getting these cams of a freind who is fitting buddy club cams and values all the other value train is staying stock.i was just wondering if i would have to spend much money to get the best out of it.its a full spoon ecu different mother board not that ebay chip ****.i have stock b16 and itr ecu's.

 

A head gasket will only raise/lower compression by a few tenths and should be used to dial in a compression ratio. If you want to raise compression, you need to go into the block and install different pistons.

If your friend is going with anything over stage one, he's going to float a valve unless he upgrades his valve springs. Valves aren't the issue, the valve springs are. As a cam spins around the lobes press on the rocker arms which in turn press on the top of the valve assembly. It's the spring that allows the valves to snap back shut. When you change to a cam with a higher lift it puts those springs under higher stress than they were designed for and they bind up not allowing the valve to close. This means that the next time the piston for the cylinder comes to TDC (top dead center) it's going to smack right into that valve. This can literally destroy everything in a motor. Valve springs are the most important component when installing a hotter profile cam.

All in all, you're fine with stock B16 compression though the cams will perform better with more but you need to swap in ITR valve springs and retainers if you're swaping the cams.

 

cheers man ill stay stock for now! thanks for the knowledge dude

 

You're quite welcome.

And yeah, make a plan of it and do as much as you can at one time to save yourself having to take things apart over and over.