Miata Turbo Forum - Boost cars, acquire cats.
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Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   MEGAsquirt (https://www.miataturbo.net/megasquirt-18/)
-   -   noob question..injectors 1.8 s/c (https://www.miataturbo.net/megasquirt-18/noob-question-injectors-1-8-s-c-20114/)

kevin02 05-09-2008 05:19 PM
Thats the max HP 305's are good for?

Bought them with an RX7 AFM, but now thinking MSPNP.

Braineack 05-09-2008 05:41 PM
Originally Posted by richard_ha (Post 247915)
I run at 11.5psi (about 220bhp) on 320cc no problem.
stock FPR?

I was at 100% DC with 305cc injectors at maybe 160rwhp.

Joe Perez 05-09-2008 05:47 PM
Originally Posted by kevin02 (Post 254715)
Thats the max HP 305's are good for?
Operating at "stock" fuel pressure (35PSI differential) and at <90% duty cycle, 305 cc injectors will max out somewhere in the 160 HP range. Most folks using these injectors are also using a rising-rate fuel pressure regulator, which by itself will run you $200 for a good one.

There are several good calculators and formulae related to fuel injectors at the RC Engineering website: http://www.rceng.com/technical.aspx

emerilnut 05-09-2008 07:22 PM
Originally Posted by Joe Perez (Post 254687)
In the OP's case, the proposed change was both to add larger injectors and remove an AFPR. Because AFPRs are non-linear by design, removing one would necessitate a complete re-tuning of the VE table, rather than a simple re-scaling or Req_Fuel recalculation.

ah, so in my case, just swapping to larger injectors is a much easier process, correct?

What else is there to change besides REQ FUEL?


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