egsir2

hi. i have a jdm b16a in my eg6. running Skunk2 Stage 1 cams. if i install b16b pistons is there gonna be a valve clearance issue? the head is standard,hasnt been ported. Head gasket is also standard. im planning to use my b16a rods. if the compression is raised to what i calculated using Zealautowerks (11.91) (seems a bit high to me) am i better off going with a stage 2 cam to get the full benefit? and to that effect,what kind of valve clearance problems will i then encounter? any help appreciated. i will keep searching in the meantime,but i cant seem to find anyone with b16b and skunk2 cams.

ThePartsGuyNate

Check ur compression ratio again I am sur that a CTR piston in a b16 is 11.1 to 1 compression if ur motor is stock with those cams then you should be A ok! Check with the comp ratio calculator on the c-speed racing website!

egsir2

hhmmm...i thought compression would be a little higher than that,but 11.9 is way off i think. so your saying ill be ok with a skunk cam? what about stage 2's?

egsir2

anyone else got any info on this? havent been able to get a concrete answer.

Syndacate

I'm pretty sure the CTR and the B16a2 use the same block...like, exactly the same.

So why would there be any clearance issues? I doubt the valves extend that far that it becomes a block issue.

00Red_SiR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">I'm pretty sure the CTR and the B16a2 use the same block...like, exactly the same.

So why would there be any clearance issues? I doubt the valves extend that far that it becomes a block issue.

</TD></TR></TABLE>

That's incorrect. The B16b (CTR) block is the same block as a B18C (taller than the b16a)

To the original poster, your actual compression ratio will be 11.64:1 with those pistons and verything else being standard. You will not have clearance problems with S2S1 cams and you will be able to use S2S2 cams as well. Just don't go crazy with cam gear adjustments. You will also need to get the small ends of your rods machined slightly to fit the CTR pistons.

egsir2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">That's incorrect. The B16b (CTR) block is the same block as a B18C (taller than the b16a)

To the original poster, your actual compression ratio will be 11.64:1 with those pistons and verything else being standard. You will not have clearance problems with S2S1 cams and you will be able to use S2S2 cams as well. Just don't go crazy with cam gear adjustments. You will also need to get the small ends of your rods machined slightly to fit the CTR pistons.</TD></TR></TABLE>


11.64 sounds a bit more realsitic. im aware of the machining requirement,but thanks for mentioning it. i thinks its 1mm off each side of the small end? i would probably be better off keeping it at a maximuim 2 cam degrees advance with the bigger cams would i?
thanks for the straight answer i was looking for. its still in the planning process,finding someone in my area to fit them could prove difficult. i havent got the equipment or time to do it myslef,but i dont trust any local mechanics. i wish i had a spare b16 i could build up in my own time and then just get someone drop it in for me.

00Red_SiR

I think it's 1mm total that needs to be removed (.5mm each side), either way just give the rod and piston to the machine shop and they'll make them fit properly.

I'm thinking you could go up to 3-4 degrees on the cam gears and be safe, just use some clay (plastigage) to check it out, it's fairly easy to do on your own without any special tools. I doubt you'd need to adjust your cams a whole lot to get them tuned right anyway.

You could also email skunk and ask them, I'm sure they've answered that question hundreds of times.

Skirts

I am very sure that the b16b is the same exact block as the b16a aside from stronger rods and taller dome pistons. Im pretty dang confident that the comp ratio is gonna be very close to 11! But I have been wrong before!

Skirts

The 1.8 litre motor is taller than the 1.6 that's y it is a 1.6! By the way this is a great upgrade with ur cams! You will be ok even on pump gas with a stock tune but there agaib much moe power is hiding when u invest in some dyno time!

egsir2

the b16b motor os not the same as the b16a. the b16b (CTR) IS A DESTROKES B18C5 (ITR)

pump gas(petrol) over here is 95 octane. what do you guys have out of the pump.


@00_RedSir:- i have literally nothing to lift the engine out of my car. i could do the pistons myself. its getting the engine in and out is the problem. i will just send the pistons to a machine shop and let them decide how much needs to be taken off.

thanks for the answers guys.

turboparts

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">

That's incorrect. The B16b (CTR) block is the same block as a B18C (taller than the b16a)

To the original poster, your actual compression ratio will be 11.64:1 with those pistons and verything else being standard. You will not have clearance problems with S2S1 cams and you will be able to use S2S2 cams as well. Just don't go crazy with cam gear adjustments. You will also need to get the small ends of your rods machined slightly to fit the CTR pistons.
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x2

SkoundrelUSA

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skirts &raquo;</TD></TR><TR><TD CLASS="quote">I am very sure that the b16b is the same exact block as the b16a aside from stronger rods and taller dome pistons. Im pretty dang confident that the comp ratio is gonna be very close to 11! But I have been wrong before!</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skirts &raquo;</TD></TR><TR><TD CLASS="quote">The 1.8 litre motor is taller than the 1.6 that's y it is a 1.6! By the way this is a great upgrade with ur cams! You will be ok even on pump gas with a stock tune but there agaib much moe power is hiding when u invest in some dyno time!</TD></TR></TABLE>

100% WRONG!

A B16B block is exactly the same as GSR/ITR block besides internals. Both deck heights are 212.39mm. You know why the B16B is a 1.6l? Because it has a 77.4mm crank as opposed to the 87.2mm crank of the GSR/ITR. Thats why the CTR is basically "a destroked ITR" (not true though, the pistons/rods are quite different)

To the original post, people have put B16B (PCT) pistons in B16As and did not have clearance issues as long as you use a stock headgasket and neither the head or block have been milled. I'd also suggest having the motor clayed just to be sure.

To fit them onto the B16 rods you have to do this

00Red_SiR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by egsir2 &raquo;</TD></TR><TR><TD CLASS="quote">@00_RedSir:- i have literally nothing to lift the engine out of my car. i could do the pistons myself. its getting the engine in and out is the problem. i will just send the pistons to a machine shop and let them decide how much needs to be taken off.
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Do you have equipment rental places in your area? That's what most people do here if they need a piece of equipment to do something specialised around the house. We just go in and rent what we need which is known as a "cherry picker" or engine hoist/lift and do it ourselves.

egsir2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">Do you have equipment rental places in your area? That's what most people do here if they need a piece of equipment to do something specialised around the house. We just go in and rent what we need which is known as a "cherry picker" or engine hoist/lift and do it ourselves.</TD></TR></TABLE>

hhmmmm...thats not a bad idea. i could look into that. thanks for all the replies fellas, i think i will go for it. i will clay the engine when im doing the work. now to start saving.....

DJ_SaNdOz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkoundrelUSA &raquo;</TD></TR><TR><TD CLASS="quote">

100% WRONG!

A B16B block is exactly the same as GSR/ITR block besides internals. Both deck heights are 212.39mm. You know why the B16B is a 1.6l? Because it has a 77.4mm crank as opposed to the 87.2mm crank of the GSR/ITR. Thats why the CTR is basically "a destroked ITR" (not true though, the pistons/rods are quite different)

To the original post, people have put B16B (PCT) pistons in B16As and did not have clearance issues as long as you use a stock headgasket and neither the head or block have been milled. I'd also suggest having the motor clayed just to be sure.

To fit them onto the B16 rods you have to do this

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