exhintake questions

[FE3-323]

if your a non believer then don't even bother, the lift is a very minor increase, duration increase slightly as well total overlap increases from 19 to 21 or 22° i forget now.

[naprotejay]

I really want this to work and I'm not trying to say its not true about the hp gains. First I measured the lift on my cams from the 93 donor motor and they were both the same lift. Then I measured the cams from my 96 motor and they were both the same lift. So I'm expecting the lift to be more on the exhaust cam and its not. Are the power gains achieved from a different duration or overlap? If anybody knows please let me know. Thanks

How did you measure the lift?

In the technical data section of the FSM, it specifies the lobe height of the exhaust cam as 1.7560" and the intake cam as 1.7360". I had a few spare exhaust cams, and used a set of calipers to measure them to pick out the 'best'.

The difference, as bpt323 said, is (relatively) very small - just over half a mm - but there definitely is a difference, and its one the motor likes

[skinnyscort]

Ok Im confused in post #4 bpt323 said to find the tooth directly opposite of the top marked one the count 3 teeth to the left (counter-clockwise) . Then in post #14 bpt323 said to move it 3 teeth clockwise. Im confused on which way to move it. I assume you are standing on the pass side facing the cam gear side of the engine. When I installed it in my engine last night I positioned it as close to the stock cam position as I could (lobes were at the same angles as the stock cam straight up) I think that was 3 teeth turned clockwise. So with my timing marks all up(crank too) I fired it up and it ran like crap very ruff and it kinda sounded like the timing was retarded. It didnt want to idle or rev easy. Did I install it three teeth the wrong way? Please help me figure out what I did wrong.

[FE3-323]

counter clockwise is how my friend told me i installed it on his car. its been ages since i ran this one.

[18sOnAiR]

this mod sounds like more trouble than its worth.

You basically NEED adjustable cam gears to make it work and those cost quite a bit.

Why hasn't anyone tried buying the mazdaspeed miata BP intake cam & making it work? You can't use its exhaust cam b/c of the distributor slot, but an escort guy my roomate knew had that **** installed in his EGT and it made a **** of a difference.

and...the mazdaspeed miata cam is about 170 shipped from MMS....for a 6-8whp gain with NO tuning required i'd take that over hours of heartache & dyno tuning trying to get this dual-exhaust cam mod to work. I applaud the creativity but to me it just isn't practical.

Where can I get more info on the Mazdaspeed miata intake cam? Any better than a 99' intake cam? Does MMS have a website?

[Jho]

Where can I get more info on the Mazdaspeed miata intake cam? Any better than a 99' intake cam? Does MMS have a website?

Is this the site you were looking for?

http://www.mazdamotorsports.com/webapp/wcs/stores/servlet/Home?storeId=10001&langId=-1

[FE3-323]

teh MS miata intake cam is the same thing as the japaneese version of the 99-00 intake cam... Us got a slightly detuned cam thats about it.
you could order it from your dealership... Check the FAQ for the part number.

[18sOnAiR]

Is this the site you were looking for?

http://www.mazdamotorsports.com/weba...0001&langId=-1

Thanks I think that will help.

[18sOnAiR]

teh MS miata intake cam is the same thing as the japaneese version of the 99-00 intake cam... Us got a slightly detuned cam thats about it.
you could order it from your dealership... Check the FAQ for the part number.

ok cool, thanks. just scored a 99 head looking to upgrade the cams.

Edit: Can I get a link for that? Check the FAQ at the top of the forum and nothing.

[Turpro]

I agree that the exintake cam mod seems to be a pain in the ass. I never got around to doing mine. There's a guy on here(mike 323) that sells performance regrinds for around 300. He claims around 12hp with his cams.it would cost you 20-40 for the exaust cam plus 200 for the adj gears. It might be better just to buy his cams and drop them in and not have to worry about how to set it up.

And if I'm not mistaken don't you have to swap to the solid lifter setup with the 99+ cams.

[18sOnAiR]

I agree that the exintake cam mod seems to be a pain in the ass. I never got around to doing mine. There's a guy on here(mike 323) that sells performance regrinds for around 300. He claims around 12hp with his cams.it would cost you 20-40 for the exaust cam plus 200 for the adj gears. It might be better just to buy his cams and drop them in and not have to worry about how to set it up.

And if I'm not mistaken don't you have to swap to the solid lifter setup with the 99+ cams.

I have the entire head, actually the whole motor picked it up for a whole $20 from a shop that works mostly on Nissans, they supposeably said the crank walked, but there nissan guys. They really dont like mazdas, said it was just a big paper weight either way I have a full head.

[18sOnAiR]

ok cool, thanks. just scored a 99 head looking to upgrade the cams.

Edit: Can I get a link for that? Check the FAQ at the top of the forum and nothing.

Nevermind found Protege FAQ had it bookmarked in favorites.

Part #'s are : BP2Y-12-183 lifter bucket (need 16, and also 16 shims)
BP4W-12-420 intake cam
or BP5A-12-420 JDM intake cam (237° vs 241° duration @.003", either cam maintains the same 17° overlap)
BP4W-12-440 exhaust cam
For the BP-ZET engine:
BP2Y-12-183 lifter bucket (need 16, and also 16 shims)
BP5A-12-420 intake cam (from MazdaSpeed Miata)
BP4W-12-440 exhaust cam

[1967cutlass]

Thinking about doing something with the cams... 10whp sounds like a pretty big difference.

[Jho]

Thanks I think that will help.

No problemo.

[Jho]

I agree that the exintake cam mod seems to be a pain in the ass. I never got around to doing mine. There's a guy on here(mike 323) that sells performance regrinds for around 300. He claims around 12hp with his cams.it would cost you 20-40 for the exaust cam plus 200 for the adj gears. It might be better just to buy his cams and drop them in and not have to worry about how to set it up.

And if I'm not mistaken don't you have to swap to the solid lifter setup with the 99+ cams.

I have Mike's "performance" regrinds. They are still two exhuast cams, so you are still doing the exintake cam mod, just with a little extra.