Hi Marc you have got to get rid of your injectors and all you need is 440cc out of a mk4 supra and a fuel pressure regulator rising rate but i got a bosh o44 fuel pump that is good for 750hp and now i run at 17.5 psi boot all day every day and with a good auto on a dyno i should be clous to 300kw well eny were between 260kw and 300kw but a lot more soon thats a thought my 440cc injectors will be up for sale soon.
>From: Marc Archbold <firstname.lastname@example.org>
>Reply-To: "Supra Club of NZ Mailing List" <email@example.com>
>To: "Supra Club of NZ Mailing List" <firstname.lastname@example.org>
>Subject: [sconz] 1JZ Hybrids
>Date: Fri, 28 May 2004 12:25:53 +1200 (NZST)
>Thought I'd share my experience of modifying my Auto JZA70 2.5TT and having
>dynoed with a (wait for it) Fuel cut defender.
>Current modifications include: Walbro 255lPH GSS342 HP fuel pump (stock
>wiring/resistor) Hybrid CT12a turbos with steel turbines & larger compressors,
>Greddy Profec B-II boost controller, custom plate & Bar intercooler.
>The FCD was built from a schematic of a reverse engineered Greddy FCD from
>MKIV.COM. Parts cost $9 including the LM324 Opamp.
>Temp was 16DegC, 55% Humidity. Factory Fuel (w/o FCD) cut @ ~14.5Psi.
>Idle AFR 14.4.
>A baseline was established with the boost controller off, effectively stock
>boost, and the FCD set very close to Fuel cut.
>Result was 225.6 RWHP and an extreme AFR of around 10 - off the scale.
>From that point the boost was raised. HP increased only very slighly and at
>16PSI detonation was heard due to the extreme Rich AFR, again, off the scale
>Ok, from the dirty hacks ideas bag - to increase the AFR at 15PSI/full load,
>FCD cut off point was decreased to 9PSI. AFR increased to 11.8 and 247RWHP.
>No detonation was heard, even at 16PSI. With this 3.89V FCD setting at 16PSI
>AFR was 12.4, no detonation.
>I can only conclude that in the case of my setup that unless there is an issue
>with fuel pressure regulation the use of an FCD is acceptable given the extreme
>AFR's at full load. It is not perfect, but the fuel system is quite capable.
>Im planning on going with either an SAFC-II, E-Manage, or (price) the soon to
>be released Autospeed/Silicon chip Magazine Digital Fuel adjuster for precise
>control with another pending dyno tune session.
>Any comments would be greatfully accepted. I'd especially like to hear from
>John Shannon - did you experience these issues and how did you overcome them?
>Supra Club of New Zealand