noob question..injectors 1.8 s/c

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05-09-2008, 05:19 PM

#21

kevin02

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Thats the max HP 305's are good for?

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

05-09-2008, 05:41 PM

#22

Braineack

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Quote:

Originally Posted by richard_ha

I run at 11.5psi (about 220bhp) on 320cc no problem.

stock FPR?

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

05-09-2008, 05:47 PM

#23

Joe Perez

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Quote:

Originally Posted by kevin02

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

05-09-2008, 07:22 PM

#24

emerilnut

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Quote:

Originally Posted by Joe Perez

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?