Dual exhaust cam swap swap b6d

[bhearts]

Reading about how 99 bp exhaust cams have more duration than intake. Lots of guys swap them for the intake and gain 10 percent na power. Has anyone tried exhaust cam swapping a b6? Seems to be you just install the cam and time it 180 out from the cam gear timing mark. They say best with adjustable cam gear

Sent from my SM-G900V using Tapatalk

[william]

Years ago I seen the bp guys doing it to escorts there was a re-drill guide that was printable so you could use the stock cam gear. I think that you lost bottom end with the cam swap?

[Advancedynamix]

You can't do that on a B6d unless you've got some other method of establishing crank rotation for the ignition/F.I. system.
The BP drives it's distributor or CAS off the exhaust cam, but it's driven off the intake cam on the b6d. The exhaust cam doesn't have the drive for the distributor.

[bhearts]

You can't do that on a B6d unless you've got some other method of establishing crank rotation for the ignition/F.I. system.
The BP drives it's distributor or CAS off the exhaust cam, but it's driven off the intake cam on the b6d. The exhaust cam doesn't have the drive for the distributor.

The ecu I'm looking into usually seems to not require a cam trigger. My tuner (zeph) said that the only ill effect he could find from un hooked up cam sensor ports was an elongated cranking period before start up. And with a 60-2 resolution crank trigger we didn't need cam triggering resolution.

Sent from my SM-G900V using Tapatalk

[jdobbs86]

You can't do that on a B6d unless you've got some other method of establishing crank rotation for the ignition/F.I. system.
The BP drives it's distributor or CAS off the exhaust cam, but it's driven off the intake cam on the b6d. The exhaust cam doesn't have the drive for the distributor.

I might be remembering this incorrectly but didn't the MX-3 version of the B6 drive the distributor off of the exhaust cam? Kind of a rare-ish engine to find a single camshaft from but might be a start if it's absolutely necessary.

[Advancedynamix]

Yes, and the DOHC B5 (not a U.S. import engine, but common in other countries) is the same way. I don't know if that would work, or be worth the effort (OBX cams are cheap for the B6ZE).

[bhearts]

Yes, and the DOHC B5 (not a U.S. import engine, but common in other countries) is the same way. I don't know if that would work, or be worth the effort (OBX cams are cheap for the B6ZE).

Free!

Sent from my SM-G900V using Tapatalk

[Advancedynamix]

That's what I'm talking about.

[bhearts]

After a little more research



265$ is cheap. But what is lock lash adjusters?

Sent from my SM-G900V using Tapatalk

[bhearts]

And a stage 2 set on eBay for 350 shipped. Can anyone decode that camshaft lingo and tell me what it means

Sent from my SM-G900V using Tapatalk

[bhearts]

It seems to be that a 272 cam is ran to higher rpm, where a 256 cam finds peak power at a lower rpm, like 6-7k.

Sent from my SM-G900V using Tapatalk

[bhearts]

That first place I found the "stage 1" cams for 260 dollars, would be totally worth it if could avoid strange shim kit. It'd be worth that in my book if it made my idle sound different. Even if only a handful percent gain, 10 percent would suffice.

Sent from my SM-G900V using Tapatalk

[bhearts]

You can't do that on a B6d unless you've got some other method of establishing crank rotation for the ignition/F.I. system.
The BP drives it's distributor or CAS off the exhaust cam, but it's driven off the intake cam on the b6d. The exhaust cam doesn't have the drive for the distributor.

sorry charlie. i finally looked at both cams side by side yesterday and realized they arent the same length. that really would cause issues trying to get the shorter exhaust cam setup to drive the cam sensor. totally creepin on these cams right now.

http://www.megatunning.com/obx-stage-1-cams-camshafts-264-256-miata-b6-na6ce-cam-shaft

when they say "needs a lock lash adjuster kit" with install. is that a requirement, or a recomendation?