Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: Stephen Chu <(email redacted)>


Any updates on turbo cams yet... or are our cars still simply
un-cam-upgrade-able? It's hard to beliveve that while there's no cams out
there for us, Supra TTs and DSMs w/ cam upgrades (ex. 264) yield such
healthy hp bumps. Where's our flow restriction then?

Stephen H. Chu
'94C T3/T4

This read-only message was archived from a public mail list.
Mail From: (email redacted)


How about just buying aftermarket NA cams that have high lift and narrow
duration and then just getting adjustable cam pulleys to get the overlap back
down. There are 3 or 4 people who have done that already.

Randy

<< Any updates on turbo cams yet... or are our cars still simply
un-cam-upgrade-able? It's hard to beliveve that while there's no cams out
there for us, Supra TTs and DSMs w/ cam upgrades (ex. 264) yield such
healthy hp bumps. Where's our flow restriction then? >>

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Mail From: "Espen Tandberg" <(email redacted)>


Hmm, is short duration desirable in a FI engine? I thought they liked
slightly longer duration?

Espen

> How about just buying aftermarket NA cams that have high lift and
> narrow duration and then just getting adjustable cam pulleys to get
> the overlap back down. There are 3 or 4 people who have done that
already.

This read-only message was archived from a public mail list.
Mail From: (email redacted)


In a message dated 11/29/00 12:03:42 AM Central Standard Time,
(email redacted) writes:

<< Any updates on turbo cams yet... or are our cars still simply
un-cam-upgrade-able? It's hard to beliveve that while there's no cams out
there for us, Supra TTs and DSMs w/ cam upgrades (ex. 264) yield such
healthy hp bumps. Where's our flow restriction then?

Stephen H. Chu
'94C T3/T4 >>
I will be checking on this in the next couple of weeks. Murray from TAD has
told me that he is familiar with an engine builder in New Zealand or
Austrailia (I can't remember which) that used to custom grind (from billet
blancs) cams for the Mazda works teams for 1.8L 323 turbo motors. They are
expensive ($900.00 for one set). Stephan has shown some interest, maybe if I
can get a group of people to buy we can get a group discount? Anyone
interested please let me know.

Emmett

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Mail From: (email redacted)

>From what I have heard WEB cams is supposedly working on a set of turbo cams
for the Miata (both 1.6L and the 1.8L) Also I have heard that if you have a
desired lift/duration you can buy a blank, contact WEB and have them grind
it to your specs. I have no clue on costs but I don't belive it's outragisly
exspensive.

Jared
www.turboimports.com

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>

FWIW, that's what I've been experimenting with. On my '95, good for a 25 hp
loss over .99 cams. Their 505 is working nicely in my n/a 1600, though.


Bill Cardell
(email redacted)
Flyin' Miata
flyinmiata.com <flyinmiata.com/>
200mphmiata.net <200mphmiata.net/>
1-800-FLY-MX5S (orders only)
1-970-242-3800 (tech)


-----Original Message-----
From: (email redacted) [mailto:(email redacted)]
Sent: Wednesday, November 29, 2000 7:25 AM
To: (email redacted); (email redacted); (email redacted)
Subject: Re: CAMS for 1.8L?


>From what I have heard WEB cams is supposedly working on a set of turbo cams

for the Miata (both 1.6L and the 1.8L) Also I have heard that if you have a
desired lift/duration you can buy a blank, contact WEB and have them grind
it to your specs. I have no clue on costs but I don't belive it's outragisly

exspensive.

Jared
www.turboimports.com

This read-only message was archived from a public mail list.
Mail From: Mark Peugeot <(email redacted)>



No they like less overlap and as much exhaust duration as possible without
increasing overlap. You want to avoid blowing the Intake charge through
the exhaust port when both exhaust and intake valves are open. This limits
your duration somewhat... where as a N/A motor uses scavenging to help
fill the cylinder.

Mark


On Wed, 29 Nov 2000, Espen Tandberg wrote:

>
> Hmm, is short duration desirable in a FI engine? I thought they liked
> slightly longer duration?
>
> Espen
>
> > How about just buying aftermarket NA cams that have high lift and
> > narrow duration and then just getting adjustable cam pulleys to get
> > the overlap back down. There are 3 or 4 people who have done that
> already.
>
>

This read-only message was archived from a public mail list.
Mail From: Mark Peugeot <(email redacted)>




Has anyone considered B6T, BPD or BPT factory cams???

Mark


On Wed, 29 Nov 2000, Bill Cardell wrote:

> FWIW, that's what I've been experimenting with. On my '95, good for a 25 hp
> loss over .99 cams. Their 505 is working nicely in my n/a 1600, though.
>
>
> Bill Cardell
> (email redacted)
> Flyin' Miata
> flyinmiata.com <flyinmiata.com/>
> 200mphmiata.net <200mphmiata.net/>
> 1-800-FLY-MX5S (orders only)
> 1-970-242-3800 (tech)
>
>
> -----Original Message-----
> From: (email redacted) [mailto:(email redacted)]
> Sent: Wednesday, November 29, 2000 7:25 AM
> To: (email redacted); (email redacted); (email redacted)
> Subject: Re: CAMS for 1.8L?
>
>
> From what I have heard WEB cams is supposedly working on a set of turbo cams
>
> for the Miata (both 1.6L and the 1.8L) Also I have heard that if you have a
> desired lift/duration you can buy a blank, contact WEB and have them grind
> it to your specs. I have no clue on costs but I don't belive it's outragisly
>
> exspensive.
>
> Jared
> www.turboimports.com
>
>
>

This read-only message was archived from a public mail list.
Mail From: "Espen Tandberg" <(email redacted)>


I see. So in theory high lift N/A cams should work pretty well with forced
induction, as long as the overlap is brought back a little?
Yet Bill doesn't seem to get anything but great hp loses testing these cams.
I remember Helio tried the HKS 264 cams without much sucess as well.

Espen


No they like less overlap and as much exhaust duration as possible without
increasing overlap. You want to avoid blowing the Intake charge through
the exhaust port when both exhaust and intake valves are open. This limits
your duration somewhat... where as a N/A motor uses scavenging to help
fill the cylinder.

Mark

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>


Helio sent those HKS cams to me after he used them, you can ask Nico about
them (at least n/a). We put them in, drove the car 20 miles and pulled them
out.

Bill Cardell
(email redacted)
Flyin' Miata
flyinmiata.com
200mphmiata.net
1-800-FLY-MX5S (orders only)
1-970-242-3800 (tech)


-----Original Message-----
From: Espen Tandberg [mailto:(email redacted)]
Sent: Wednesday, November 29, 2000 9:42 AM
To: Mark Peugeot
Cc: (email redacted); (email redacted); (email redacted)
Subject: Re: CAMS for 1.8L?



I see. So in theory high lift N/A cams should work pretty well with forced
induction, as long as the overlap is brought back a little?
Yet Bill doesn't seem to get anything but great hp loses testing these cams.
I remember Helio tried the HKS 264 cams without much sucess as well.

Espen


No they like less overlap and as much exhaust duration as possible without
increasing overlap. You want to avoid blowing the Intake charge through
the exhaust port when both exhaust and intake valves are open. This limits
your duration somewhat... where as a N/A motor uses scavenging to help
fill the cylinder.

Mark

This read-only message was archived from a public mail list.
Mail From: (email redacted)


As I have said before, the stock 99 cams are perfect for boosted 1.8 motors.
Only 17 degrees overlap and big exhaust duration.

See solomiata.com/cams.html

Randy

<< I see. So in theory high lift N/A cams should work pretty well with forced
induction, as long as the overlap is brought back a little?
Yet Bill doesn't seem to get anything but great hp loses testing these cams.
I remember Helio tried the HKS 264 cams without much sucess as well.
>>

This read-only message was archived from a public mail list.
Mail From: (email redacted)


FYI...A 99 EX with a 94-97 IN produces only 14 degrees overlap.

Randy

<< As I have said before, the stock 99 cams are perfect for boosted 1.8
motors. Only 17 degrees overlap and big exhaust duration.

See solomiata.com/cams.html >>

This read-only message was archived from a public mail list.
Mail From: Tony Schreiber <(email redacted)>


Oooh, sounds nice. Who's got a blown 99 motor that wants to part with
cams?

> As I have said before, the stock 99 cams are perfect for boosted 1.8 motors.
> Only 17 degrees overlap and big exhaust duration.
>
> See solomiata.com/cams.html
>
> Randy
>
> << I see. So in theory high lift N/A cams should work pretty well with forced
> induction, as long as the overlap is brought back a little?
> Yet Bill doesn't seem to get anything but great hp loses testing these cams.
> I remember Helio tried the HKS 264 cams without much sucess as well.
> >>
>


Tony Schreiber, Senior Partner Man and Machine, Limited
mailto:(email redacted) technocraft.com

linktoss.com _______The Fastest Way to Send a Link to Anyone!
digitacamera.com ______________DigitA Camera Scripts and Tips
is300.net ___________The Enthusiast's Home of the Lexus IS300
cfug-sfl.org ___________South Florida Cold Fusion Users Group
montero-sport.com ___________________The Montero Sport Garage

This read-only message was archived from a public mail list.
Mail From: "Mel Hoagland" <(email redacted)>


So the best combination would be these two cams with HLAs on the IN and
solids on the EX, right?

TIA

Mel
--------------------------------------------------------------------
Mel Hoagland
Wheezy 96/97 black FMII/III vrrooommmm


----- Original Message -----
From: <(email redacted)>
To: <(email redacted)>
Sent: Wednesday, November 29, 2000 12:24 PM
Subject: Re: CAMS for 1.8L?


>
> FYI...A 99 EX with a 94-97 IN produces only 14 degrees overlap.
>
> Randy
>
> << As I have said before, the stock 99 cams are perfect for boosted 1.8
> motors. Only 17 degrees overlap and big exhaust duration.
>
> See solomiata.com/cams.html >>
>

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>


Maybe. I'll try it, I've got the hydraulics in my '95 right now, haven't
dynoed with the current set-up. It really liked the '99s, didn't like the
Webs.

Bill Cardell
(email redacted)
Flyin' Miata
flyinmiata.com
200mphmiata.net
1-800-FLY-MX5S (orders only)
1-970-242-3800 (tech)


-----Original Message-----
From: Mel Hoagland [mailto:(email redacted)]
Sent: Wednesday, November 29, 2000 10:35 AM
To: (email redacted)
Subject: Re: CAMS for 1.8L?



So the best combination would be these two cams with HLAs on the IN and
solids on the EX, right?

TIA

Mel
--------------------------------------------------------------------
Mel Hoagland
Wheezy 96/97 black FMII/III vrrooommmm


----- Original Message -----
From: <(email redacted)>
To: <(email redacted)>
Sent: Wednesday, November 29, 2000 12:24 PM
Subject: Re: CAMS for 1.8L?


>
> FYI...A 99 EX with a 94-97 IN produces only 14 degrees overlap.
>
> Randy
>
> << As I have said before, the stock 99 cams are perfect for boosted 1.8
> motors. Only 17 degrees overlap and big exhaust duration.
>
> See solomiata.com/cams.html >>
>

This read-only message was archived from a public mail list.
Mail From: (email redacted)


I've got a brand new (unused, never installed) 99 intake cam somewhere in the
garage. I bought the 99 J-spec intake cam at the same time and never got
around to installing it before I put in the 515's.

Randy

<< Oooh, sounds nice. Who's got a blown 99 motor that wants to part with
cams? >>

This read-only message was archived from a public mail list.
Mail From: (email redacted)


Technically, you can run the solid 99 cams with HLA's. You would loose a
touch of lift over the advertised numbers though.

Randy

<<
So the best combination would be these two cams with HLAs on the IN and
solids on the EX, right? >>

This read-only message was archived from a public mail list.
Mail From: Ray Ayala <(email redacted)>


Seems like the lash for the solid lifters should just about compensate
for the squish in the HLAs though.

(email redacted) wrote:
>
> Technically, you can run the solid 99 cams with HLA's. You would loose a
> touch of lift over the advertised numbers though.
>
> Randy
>
> <<
> So the best combination would be these two cams with HLAs on the IN and
> solids on the EX, right? >>

This read-only message was archived from a public mail list.
Mail From: "Espen Tandberg" <(email redacted)>


The HLA cams with solid lifters as well, right? At least technically? ;)

Espen

> Technically, you can run the solid 99 cams with HLA's. You would loose a
> touch of lift over the advertised numbers though.

This read-only message was archived from a public mail list.
Mail From: "n.p. van steen" <(email redacted)>


If these HKS cams are the same as the ones we tried out in april 1998 on
Bill's N/A then these are no good for non Forced Inducted miata's too.

Nico



> I remember Helio tried the HKS 264 cams without much sucess as well.
>
> Espen
>
>
> No they like less overlap and as much exhaust duration as possible without
> increasing overlap. You want to avoid blowing the Intake charge through
> the exhaust port when both exhaust and intake valves are open. This limits
> your duration somewhat... where as a N/A motor uses scavenging to help
> fill the cylinder.
>
> Mark
>

This read-only message was archived from a public mail list.
Mail From: (email redacted)


No

<< The HLA cams with solid lifters as well, right? At least technically? ;) >>

This read-only message was archived from a public mail list.
Mail From: Stephen Chu <(email redacted)>


Following refers to turbo'd '94+ HLA 1.8L motors:

Judging from Randy's cam-spec chart, would the result of tuning some
overlap via cam gears out of the '94 EX cam be preferable to swapping for a
'99 EX. The '94+ EX cams have more lift as well as longer duration (250
vs. 242), yes? I suppose the shape of the lift duration is plays a
critical role too. Also, when overlap is dialed out of TDC, more overlap
results at BDC. What are the consequences here?

If you had to guess, would 99 IN & OUT or 94~97 IN & 99 OUT be desired on a
turbo'd HLA motor?

Stephen H. Chu
'94C T3/T4



At 12:24 PM 11/29/2000 -0500, (email redacted) wrote:
>
>FYI...A 99 EX with a 94-97 IN produces only 14 degrees overlap.
>
>Randy
>
><< As I have said before, the stock 99 cams are perfect for boosted 1.8
>motors. Only 17 degrees overlap and big exhaust duration.
>
> See solomiata.com/cams.html >>

This read-only message was archived from a public mail list.
Mail From: Stephen Chu <(email redacted)>


Here's some figures for DSMs... found it at dsm.org. They have a lot more
lift available than we do. It was pointed out that the open and close
specs are possibly the actual durations at a specified lift (1mm?), because
they don't add up.

Open Dur Close Lift
1G intake 21 BTDC 252 51 ABDC 9.65mm
1G exhaust 55 BBDC 242 9 ATDC 9.12mm
HKS intake 2 BTDC 264 28 ABDC 10.3mm
HKS exhaust 42 BBDC 264 12 ATDC 9.8mm
HKS intake 272 10.3mm
HKS exhaust 272 9.8mm


Stephen H. Chu
'94C T3/T4


At 10:19 AM 11/29/2000 -0800, Ray Ayala wrote:
>
>Seems like the lash for the solid lifters should just about compensate
>for the squish in the HLAs though.
>
>(email redacted) wrote:
>>
>> Technically, you can run the solid 99 cams with HLA's. You would loose a
>> touch of lift over the advertised numbers though.
>>
>> Randy
>>
>> <<
>> So the best combination would be these two cams with HLAs on the IN and
>> solids on the EX, right? >>