Ryan_G

iTrader: (8)

I was planning on building my MSM motor but found a great deal on an 01' motor with VVT that I will be purchasing. I want to know if there is any reason the MSM cams would not work in a VVT motor if I swapped them over since they are slightly more aggressive from my understanding. Would this swap offer the benefits I am expecting?

soviet

iTrader: (10)

Interesting question.

I know for sure that VVT intake cam has a nub on the end for the CAM sensor, which is no other cams have. You can probably work around that.

I'm not aware of any other reason why they wouldn't fit, but its possible that the VVT actuator has something to do with it.



edit: yeah the VVT intake cam has screw holes for actuator mounting on it and sticks out a lot further.


More pictures:
https://www.miataturbo.net/engine-pe...84/#post319719

Ryan_G

iTrader: (8)

I actually only think the exhaust cam on the MSM is more aggressive so I don't think that is a big deal.

miata2fast

iTrader: (2)

I have heard of motor parts being called boat anchors, but was that head actually used as a boat anchor?

Ryan_G

iTrader: (8)

So I read that thread you linked soviet and I saw a whole lot of speculation but did not see any actual tested results. It is also incredibly old and I assume that someone has tried this in the past 5 years. I was thinking Savington or Emilio would have done this or atleast figured out if it would work.

18psi

iTrader: (76)

Very intersting question indeed.

I'm hoping someone has good info on this. (or you try it and report back )

Oscar

iTrader: (2)

And here I was thinking the BP5A intake cam was the hot ticket for non-VVT builds as an OEM solution.

Ryan_G

iTrader: (8)

If I get no answer and it fits the motor with no problems I will be more than happy to dyno test this thing.

Savington

iTrader: (31)

Exhaust cams are identical for all 99-05 motors including the MSM AFAIK.

VVT intake cams are unique and cannot be interchanged with BP4W or BP5A cams. The #1 journal has a significantly larger diameter.

Ryan_G

iTrader: (8)

Thank you for the response Savington. That is just the info I needed.

Braineack

iTrader: (62)

by removing the cam sensor and VVT abilities? I wouldn't call those benefits.

Savington

iTrader: (31)

I think the monumental oil leak and oil pressure loss that would result from the mismatched journal diameter outshines the issues created by a lack of cam sensor/VVT.

Braineack

iTrader: (62)

He should swap in a 1.6L and buy a B6T turbo manifold.

Savington

iTrader: (31)

I hear they're all over the junkyards

hustler

iTrader: (6)

That's where I found my 3.63, 3.30, and 5.22 rear ends.

Braineack

iTrader: (62)

you missed the joke:

Is it possible to get a miata 1994 stock to 200hp with only $3,000? - MX-5 Miata Forum

20g's.