Miata Mailing List: January 1998, Message #77
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From: 	pete davio <peterdavio@sprintmail.com>

Subject: Performance Rebuild   WAS: Re: Cams anyone???

Date: 	Thu, 1 Jan 1998 18:05:08 +0000



Aaron,  



you might want to check out this site,  Miq Millman, making something

like 180 hp, naturally aspirated, from a 1.6 liter engine.  If you can

get a response from him, I suspect his input would be very useful.



http://www.teleport.com/~miq/miata/mymods.html



He has a custom ground cam for his 1.6 from a 1.8, IIRC.  No, that seems

very wrong,  aren't they different firing orders??,  hmmmmmm.





pete





LeanAngle1 wrote:

> 

> In a message dated 98-01-01 16:56:33 EST, Sonja62786 writes:

> 

> <<

>  Would you go to solid lifters at the same time (as the ramps on hydraulics

> can be tricky to design properly as per my experience with Isky cams)? and

> what part of the rev range would you want affect?  It is a very interesting

> prospect... maybe combined with variable length intake tract....hmmm... if

> more overlap would shaving some off the head be helpful as effective CR will

> drop some....

>   >>

> 

> * Sonja,

> 

> Here's what I've found out and what I'm planning on doing:

> 

> HKS makes three sets of cams...from mild to wild....the mild one is good for

> about 10hp...don't know about the rest. Don't know if I'd have to change to

> solid lifters or if the HLA will be sufficient. Seeing how I'd have to change

> lifters on installation of the cams..it might be a good idea to go to

> solids..but I'll need to research a little more here.

> 

> My plan is to produce a normally aspirated 160 to 170 hp!!...ambitious

> huh...especially since I want the package to be streetable.... so a rebuild is

> in the works. .020 over size pistons and raising the C/R to 9.5 to 1, and some

> work on the head...three angle valvle job, port matching the intake and

> exhaust..cc'ing the chambers, coating the piston tops with ceramic heat

> material, and using a unique intake maifold. I think it would be really unique

> to use individual injectors throttle bodies. I have spoken to Bill Cardell

> about them and it is a possibility...but to take advantage of them, I'd have

> to also get a new FM ECU...which is still in development..but should be done

> pretty soon...that's one scenario..the other is to get a '99 intake..I realize

> that the '99 intakes are bigger than the existing 1.8 so I'd have to enlarge

> my heads intake openings, or if that's not feasible..then build up the intake

> track in the manifold and do some machining...the possible advantage here is

> the variable intake track the '99 has. Of course I'd also extrude hone the

> intake as well and port match it too...Another possibility is a Protege intake

> manifold..as I hear they are of a variable intake design....both manifolds use

> a vacuum set up to open the bigger track up from 5K rpm and above. I know by

> driving the '99 that the system works pretty well...torque is improved across

> the rpm range.

> 

> What I'm trying to achieve is usable hp throught the range. By combining some

> good old fashion performance tricks (cams etc.) plus new technology that's

> available...ECU and variable intakes...I'm hoping I could improve the bottom

> end tremendously, but also the top without any particular sacrifices in the

> torque curve. I'm thinking linear power here....

> 

> What do ya think?..Am I chasing my tail?....I just like the idea of a good

> normally aspirated engine......

> 

> Sorry for the rambling...your comments as always are most welcome...

> 

> Aaron



-- 

Pete and Bruiser

Silver 92A  with classic PhRedd stripes!

cum grano salis