CR-Vtec Stage 2 mod suggestions

[agent_noman]

Hey everyone, I'm looking for some suggestions on what next steps to take on building up my b20z with b16 head.

I'm considering headwork like new valvtrain, definitely higher compression pistons, possibly knife-edged crank, and whatever else I'm forgetting. I really don't have a particular budget. Just say about $2000 for now.

Please include with suggestions: why it will help, brand names, cost.

My applications: Daily driver, monthly autocross, couple annual road rallies.

Thanks!

[agent_noman]

Anybody?

[randyman]

Originally posted by agent_noman
Hey everyone, I'm looking for some suggestions on what next steps to take on building up my b20z with b16 head.

I'm considering headwork like new valvtrain, definitely higher compression pistons, possibly knife-edged crank, and whatever else I'm forgetting. I really don't have a particular budget. Just say about $2000 for now.

Please include with suggestions: why it will help, brand names, cost.

My applications: Daily driver, monthly autocross, couple annual road rallies.

Thanks!

u have to figure out how high of a compression that u want to get away with. i would suggest having ur bottom end built first. the head can wait till u get more funds. that way u can use the car to drive around. check out www.importbuilders.com or www.crvtec.com for more info regarding piston selections.

knife-edging is not necessary. if anything ur only compromising the integrity of the crank since it is not submerged in oil like the V8 engines. save some money and spend it on beefy rods (crower, eagle, and such), arp rod bolts, new bearings, new seals, machine work labor, etc.

hopefully i answered ur questions. feel free to ask some more if i missed anything.

hth.

[agent_noman]

What about cams? Does the CR-Vtec respond well to say CTR & ITR cams?

I believe I'm at about 10:1 compression right now. I would like to go about 11:1.

Also, I would like to at least rev comfortably to 9k RPM when I need to. So would you say to achieve this I'm looking at rods and pistons first? And why are the stock b20 rods not strong enough?

[randyman]

Originally posted by agent_noman
What about cams? Does the CR-Vtec respond well to say CTR & ITR cams?

I believe I'm at about 10:1 compression right now. I would like to go about 11:1.

Also, I would like to at least rev comfortably to 9k RPM when I need to. So would you say to achieve this I'm looking at rods and pistons first? And why are the stock b20 rods not strong enough?

what kind of pistons are u running? if u have stock b20 pistons then the ITR cams would be the maximum as far as cams go. u can't get anything more aggressive than that. this is due to the b20's valve reliefs. they are not deep enough to accept very aggressive cams. even with the ITR cams, ur leaving no room for error as far as advancing the timing.

9000 rpms is more than enough to make power for b20/vtecs. as long as u stuff ur bottom end with beefy rods, arp rod bolts, etc. ur going to be fine. u also have to consider upgrading ur valvetrain to keep up to those high revs. 9K is alright once in a while. if u take the engine to 9K almost everyday then u deserve to have a blown engine.

the b20 rods are strong. shot-peened b20 rods are stronger. eagle, or crower are the strongest.

hth.

[Solely92Hatch]

randyman: whats your setup like?

[dlim1]

what about staying non vtec and getting some crower cams with springs, retainers and shifting at 7000? that wont be too bad right?

[randyman]

Originally posted by dlim1
what about staying non vtec and getting some crower cams with springs, retainers and shifting at 7000? that wont be too bad right?

that would be perfectly fine. it will be up to u on how u want to target ur specific goals regarding what route u want to make power -- turbo, N/A, engine swap, head swap, etc. try to also research what kind of hp figures that some people are making out there with the certain type of setup that u want so u can get a rough estimate about reliability and power. that way it'll give u a better idea on what to expect, or not to expect.

goodluck.

[randyman]

Originally posted by Solely92Hatch
randyman: whats your setup like?

PM or e-mail me and i'll be more than happy to answer ur questions regarding my setup so as to stay within the topic at hand.

thanks.

[agent_noman]

Yes, I have stock b20 pistons. This is my understanding so far:

1. Eagle or crower rods with ARP bolts
2. Higher compression pistons with deeper valve reliefs. Any brand recommendations?
3. springs, retainers. what else is involved in this?
4. cams- longer duration?

This is the order I am also understaning. It would make sense to do rods and pistons at the same time. Then valvetrain and cams together.

Now since I would be putting in higher compression pistons first, would everything run okay as long as I am not running past 7000k until I get the headwork done?

Thanks.