I'm building a B18a1 motor with CTR Pistons. All i need now is to drop some cams and I'm done. I've ben looking at brian crower's stage 2 but not sure because of possible clearance issues. Could anyone point me in the right direction please?

 

it depends man. i personally like the buddy club cams. i have an itr in an ek with buddy club stage 3's and it hauls some serious ***. but it really depends on what the compression is cause if ur running higher than a 12.5:1 comp ratio u can use te stage 4's which will make alot of power on that motor but be prepared to run 93 octane. ur also gonna need to change ur valve springs and retainers at least with some cams. you should post a little more on what your actually looking for. That was a pretty generic topic.

 

Thanks Cartune network

My c.r. would be somewhere around 11.5:1. My car is a daily driver so I'm not interested in anything too extreme. But my primary concern is about lift and duration of the cams messing with valve-piston clearance since those pistons are really tall. The piston wall even sticks out of the deck a little bit.

So I just want a pair of cams that will let me squeeze more power from my engine without having the risk of damaging my top end, or having to use weird timings to prevent that from happening. Also I would like to retain a fairly good idle.

Anybody have an idea?

 

Oh almost forgot, I already have crower's dual valve springs.

 

ok at that comp ratio the buddy club stage 3's would be perfect i use them in my daily driven itr motor it hauls very nicely and its not too big of a cam either . i dont remember the exact specs but i think there along the lines of 295 degrees with a 11.3 mm lift there really nice and i know alot of other people that use um besides me. ur using a v-tec head right if not i dont know if these cams are for non v-tec cause they have the primary and secondary lobe for the additional rocker arm that v-tec has. if not let me know ill see what is available for an Ls and let u know i sell alot of this stuff too so if ur in the tristate area juss let me know. but if ur using a v-tec head the stage 3 buddy clubs are probably the best ull find at somewhat of an affordable price.

 

No V-tec. I'm using a port & polished B18A1 head.

 

the only company i know of that makes cams for that head is crower or u can get what is called a regrind which is good but not as accurate. but i would say go with crower and they also have a few different cams at different durations and lifts so pick ur choice. good luck man

 

you compression is going to be closer to 13:1. you picked some terrible pistons.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by doood &raquo;</TD></TR><TR><TD CLASS="quote">you compression is going to be closer to 13:1. you picked some terrible pistons.</TD></TR></TABLE>

same thing I was thinking.

Your best bet is to sell the PCT CTR pistons and get PR3(USDM b16) or P30(JDM B16) for a nice bump in the range of 11.3-11.8:1

 

How did you guys come up with those numbers? Only ZealAutowerks calculator shows 13.7:1 cr, the other cr calculators dont exceed 12.3:1 cr. Besides, dc2-guy used to have a B18A1 with PCTs and Crower's 404s and never had any kind of problems. That engine was running strong.

 

only the zeal calculator takes into account the pct's different compression height

what was dc2-guy's exact setup? what fuel was he running? what were his piston to valve clearances? how much did he have the cams adjusted?

you cant say something like it ran strong without knowing every little detail about the build.

 

I just know that his setup was really close to mine: Same cylinder head, same block, same pistons, same head gasket, same rods. He was running 91 gas. As to how much did he have the cams adjusted, I really don't know.

 

Also, I've been in this build for a while now and I've made some test drives. I was really impressed at first. With stock cams an exhaust manifold, my engine was running smoothly and cooler than before (I really don't know why). It haves way more power than before, specially torque. So I think that with the proper cams and a 4-2-1 DC header it should be even more powerful.

Thank you all for your replies, I really appreciate your help!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NASuperSi &raquo;</TD></TR><TR><TD CLASS="quote">How did you guys come up with those numbers? Only ZealAutowerks calculator shows 13.7:1 cr, the other cr calculators dont exceed 12.3:1 cr. Besides, dc2-guy used to have a B18A1 with PCTs and Crower's 404s and never had any kind of problems. That engine was running strong.
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check my thread here...last post
https://honda-tech.com/zerothread/1899931


C-speed if you have used it mis-calculates the PCT piston.
Zeal autowerks is fairly accurate to my knowledge but also, rnning 13.7 CR you will need more then 91 octane

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NASuperSi &raquo;</TD></TR><TR><TD CLASS="quote">No V-tec. I'm using a port & polished B18A1 head. </TD></TR></TABLE>
Compression will not be too high, the combustion chamber on B18A and B heads is 45cc's and drops compression considerably.

 

Ok then. The ZealAutowerks calc. is the accurate one and my setup yields 13.17:1 cr. Even when I haven't noticed any knocking running 91 gas on the test runs, I'm pretty sure that it's gonna be an issue once the project is completed.

So, what about 93 gas?

 

yeah with that head your using cr should be just fine

 

Thanks for posting b19coupe. I've been following your threads for some time now and figure that you have a lot of experience in b engines. So, what's your take on my setup? What do you think would be some of the pros and cons? And I'll also appreciate any suggestions you may have.

 

With VTEC pistons and a non-VTEC head you have plenty of piston the valve clearance. You can run the biggest non-VTEC cams you can find and be o.k. The Crower 404's would be a good choice.

 

Thanks a lot. One thing tho, what about knocking? Do you think I'll be ok on 91 gas with that kind of c.r. and 404 cams?

 

According to C-speed the compression is only 11.4:1. I know that the calculator is off for PCT pistons, but not that much. Also, the bigger the cam you run, the lower your <U>dynamic</U> compression. As with any setup, the key to safely making the most usable power will be good tuning.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NASuperSi &raquo;</TD></TR><TR><TD CLASS="quote">So I think that with the proper cams and a 4-2-1 DC header it should be even more powerful.
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that will probably choke your motor, especially with a stock collector.

 

Choke my motor? Stock collector? Could you explain a little bit. Thanks

 

http://www.team-integra.net/se...ID=50
http://www.team-integra.net/se...D=554

I know that simply sending you links and telling to you read isn't a great answer, but it'll help you out a lot. Basically, you can find a better designed header, and do a 2.5" collector on it and it'll breath a lot better. The collector is the last reduction on the header itself. There's a reason why guys spend upwards of $1000 on a custom header.

 

Thanks for the links, they were really helpful. My budget is kinda tight so I can't afford to buy a custom header plus I already bought a DC 4-2-1 Header. From the links you sent me I understand that with this header I'll be sacrificing power on higher rpms, Am I right?