Miatapower List Archive

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Mail From: (email redacted)


Hello all, Having just read the new SCC article on the Subaru 2.5RS, I
noticed they got some really good HP numbers with using the Apex-i fuel
computer.
My question is has anybody used this as a piggy back for the stock ECU on a
F/I miata?
I'm currently awaiting my turbo kit and was looking for extra goodies to
enhance performance. I know that the FMII ECU is great for this, but was
wondering how well the Apex-i would handle fuel curves without having to
spend $1200 for the FM unit.
Maybe dealer alt could look into this unit, as a less expensive alternative,
for people who would rather not go all the way with the FM ECU.
The price is right, I believe the Apex unit is around $400.
Any opinions or anybody tried this???
Chris Rummel
RumNHammer

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Mail From: (email redacted)



FWIW I believe that the FM-II ECU for the '99 is the link piggybak and it is
cheaper than the normal FM-II ECU, I don't know if bill sells them
separately however they probably are similar in cost. I am sure that the
APEX-i does a fine job squirting in extra fuel, I don't know if it will
adjust the timing like the link piggyback.

You can get good numbers a variety of ways, and a piggyback unit is one of
them, as far as fuss factor who knows.... One disadvantage to running the
proper injectors controlled by 1 ecu is that you can have a failure on one
system and still have fuel flow from the second system, if this happens you
will suddenly become very lean and you will have detonation.

If you have a '90-97 miata and can wait until you have the money to get a full
ECU do it!!! You will be very pleased with the result and the flexibility.
On the '99 there is no clear path yet.

Mark

PS - I believe that price on the APEX-i is without the additional injectors.


>
>
> Hello all, Having just read the new SCC article on the Subaru 2.5RS, I
> noticed they got some really good HP numbers with using the Apex-i fuel
> computer.
> My question is has anybody used this as a piggy back for the stock ECU on a
> F/I miata?
> I'm currently awaiting my turbo kit and was looking for extra goodies to
> enhance performance. I know that the FMII ECU is great for this, but was
> wondering how well the Apex-i would handle fuel curves without having to
> spend $1200 for the FM unit.
> Maybe dealer alt could look into this unit, as a less expensive alternative,
> for people who would rather not go all the way with the FM ECU.
> The price is right, I believe the Apex unit is around $400.
> Any opinions or anybody tried this???
> Chris Rummel
> RumNHammer
>

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


The Apex-i unit is trick for what it is, has some really cool features
besides fuel management, but it lacks the ability to manipulate timing.
My friend who's turboing his Impreza RS has one of these, and he'll
be using a J&S to pull back timing. For low boost, I'd prefer to use
this over a fuel pump/afpr setup. - Beau

--- (email redacted) wrote:
>
> Hello all, Having just read the new SCC article on the Subaru 2.5RS, I
> noticed they got some really good HP numbers with using the Apex-i fuel
> computer.
> My question is has anybody used this as a piggy back for the stock ECU on a
> F/I miata?
> I'm currently awaiting my turbo kit and was looking for extra goodies to
> enhance performance. I know that the FMII ECU is great for this, but was
> wondering how well the Apex-i would handle fuel curves without having to
> spend $1200 for the FM unit.
> Maybe dealer alt could look into this unit, as a less expensive alternative,
> for people who would rather not go all the way with the FM ECU.
> The price is right, I believe the Apex unit is around $400.
> Any opinions or anybody tried this???
> Chris Rummel
> RumNHammer
>
__________________________________________________
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This read-only message was archived from a public mail list.
Mail From: (email redacted)


Really, I didn't relise it did that much, I would be using the MSD with the
rpm and rate gain control from bipes, to handle the timeing. This Apex-i is
starting to sound better and better.
This may just be the ticket for those of us who prefer to stay relatively low
boost.
Would I be able to do away with the AFPR altogether with this?? and still
keep the stock ingectors as well?
Chris Rummel
RumNHammer

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


I doubt you could get away without an AFPR for anything above a non-intercooled
6 psi... 250 cc/min injectors would likely be close to maxed out. - Beau

--- (email redacted) wrote:
> Really, I didn't relise it did that much, I would be using the MSD with the
> rpm and rate gain control from bipes, to handle the timeing. This Apex-i is
> starting to sound better and better.
> This may just be the ticket for those of us who prefer to stay relatively low
> boost.
> Would I be able to do away with the AFPR altogether with this?? and still
> keep the stock ingectors as well?
> Chris Rummel
> RumNHammer
>
__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
im.yahoo.com

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



Wait a sec... I believe I'm wrong about the size of the stock injectors
(thinking 1.8 here), Jason's probably right. - Beau

--- Beau Randall <(email redacted)> wrote:
>
> I doubt you could get away without an AFPR for anything above a non-intercooled
> 6 psi... 250 cc/min injectors would likely be close to maxed out. - Beau
>
> --- (email redacted) wrote:
> > Really, I didn't relise it did that much, I would be using the MSD with the
> > rpm and rate gain control from bipes, to handle the timeing. This Apex-i is
> > starting to sound better and better.
> > This may just be the ticket for those of us who prefer to stay relatively low
> > boost.
> > Would I be able to do away with the AFPR altogether with this?? and still
> > keep the stock ingectors as well?
> > Chris Rummel
> > RumNHammer
> >
> __________________________________________________
> Do You Yahoo!?
> Talk to your friends online with Yahoo! Messenger.
> im.yahoo.com
>
__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
im.yahoo.com

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


Is there any information on the web about this system?



Beau Randall wrote:
>
> Wait a sec... I believe I'm wrong about the size of the stock injectors
> (thinking 1.8 here), Jason's probably right. - Beau
>
> --- Beau Randall <(email redacted)> wrote:
> >
> > I doubt you could get away without an AFPR for anything above a non-intercooled
> > 6 psi... 250 cc/min injectors would likely be close to maxed out. - Beau
> >
> > --- (email redacted) wrote:
> > > Really, I didn't relise it did that much, I would be using the MSD with the
> > > rpm and rate gain control from bipes, to handle the timeing. This Apex-i is
> > > starting to sound better and better.
> > > This may just be the ticket for those of us who prefer to stay relatively low
> > > boost.
> > > Would I be able to do away with the AFPR altogether with this?? and still
> > > keep the stock ingectors as well?
> > > Chris Rummel
> > > RumNHammer
> > >
> > __________________________________________________
> > Do You Yahoo!?
> > Talk to your friends online with Yahoo! Messenger.
> > im.yahoo.com
> >
> __________________________________________________
> Do You Yahoo!?
> Talk to your friends online with Yahoo! Messenger.
> im.yahoo.com