Help! Camshaft questions 95/99 head swap
#1
Help! Camshaft questions 95/99 head swap
Well I planned on doing the 99 head swap to my 95 miata. I took the head to the shop earlier this week and this morning the machine shop told me that the miatas head and cams are out of spec and need replaced. One reason I was wanting to do this swap is not only for performance but also to eliminate the hydraulic lifters that are beginning to tick more and more. So you see Im in a pickle
its around $500 for all new lifters for my 95
or around $420 for new camshafts.
So my question is will the 95 head accept the 99 solid lifters and cams? Not only will this swap be a little cheaper but it should be a little performance gain do to the higher lift of the 99 cams correct?
its around $500 for all new lifters for my 95
or around $420 for new camshafts.
So my question is will the 95 head accept the 99 solid lifters and cams? Not only will this swap be a little cheaper but it should be a little performance gain do to the higher lift of the 99 cams correct?
#3
I'm told that the bore is out of spec on both cams. The engine that the head came off of was from a thrust bearing failure engine. Not that it would have anything to do with this cam situation I'm just saying, nothing else from this engine has been salvaged. My own visual inspection it all looked ok bit I did no measurements myself.
When I'm told bore is to large I am thinking of the clearance between the cam and there caps I guess you could call it. Correct me I'm wrong please..
When I'm told bore is to large I am thinking of the clearance between the cam and there caps I guess you could call it. Correct me I'm wrong please..
#5
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lol, throw it all away. As Ian said, when the crank machines the block it throws iron filings into the oil system and they wreak absolute havoc on everything. The head is trash, the cams are trash, absolutely nothing is usable from a thrust bearing failure motor.
Throw it all away and buy a new head/cams.
#7
You guys need to check the prices on new heads from Mazda motorsports. Cheaper than you would think, and no worry of a fuxored journal. Price w/o valves cams or lifters $700, regardless of casting version. I have literally been through the ringer trying to find a good 4w head, I will do this if the current one doesn't check out.
#8
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There's no doubt that the 99 head flows better, but if you are really annoyed by your hydraulic lifters ticking, they can be removed and cleaned with some solvent to clear out any gunk built up in them. I believe there's a writeup in the m.net garage section.
It seems to me there's been a lot more chatter lately about people selling junk heads from thrust bearing failure motors. That $700 from Mazda Motorports isn't too ridiculous, considering you could spend $400-500 on a junk head. It's getting to the point that if I'm buying a used head from a non-local seller I will want to see pics with all of the cam caps pulled.
It seems to me there's been a lot more chatter lately about people selling junk heads from thrust bearing failure motors. That $700 from Mazda Motorports isn't too ridiculous, considering you could spend $400-500 on a junk head. It's getting to the point that if I'm buying a used head from a non-local seller I will want to see pics with all of the cam caps pulled.
#9
Well I have sourced out some hla's for a decent price so I may just stick with my 95 head now. But as far as performance gains, would a 95 head make anymore power running the 99 cams/lifters?
When this engine goes back in the car I will have my diy turbo set up installed so Im looking for the best turbo cams to run kind of.
If decent gains can be made running 99 cams I will most likely order corksports intake j-spec cam they sell for the 99, and track down a exhaust cam else where.
When this engine goes back in the car I will have my diy turbo set up installed so Im looking for the best turbo cams to run kind of.
If decent gains can be made running 99 cams I will most likely order corksports intake j-spec cam they sell for the 99, and track down a exhaust cam else where.
#12
94-05 MAZDA MIATA MX5 1.8L 16 LIFTERS LASH ADJUSTERS BP : eBay Motors (item 350139455342 end time Mar-06-10 18:35:07 PST)
Those have been in my car for 4 years.
Those have been in my car for 4 years.
#14
Cylinder Heads International - Quailty Rebuilt Cylinder Heads
The head should be in Friday, I'll let everyone know how it looks when it comes in.
Btw the site only lists the bp05 head, but when I called them and asked for the bp4w they had one there.
The head should be in Friday, I'll let everyone know how it looks when it comes in.
Btw the site only lists the bp05 head, but when I called them and asked for the bp4w they had one there.
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