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Old 05-09-2008, 06:19 PM   #21
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Thats the max HP 305's are good for?

Bought them with an RX7 AFM, but now thinking MSPNP.
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Old 05-09-2008, 06:41 PM   #22
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Originally Posted by richard_ha View Post
I run at 11.5psi (about 220bhp) on 320cc no problem.
stock FPR?

I was at 100% DC with 305cc injectors at maybe 160rwhp.
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Old 05-09-2008, 06:47 PM   #23
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Originally Posted by kevin02 View Post
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:
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Old 05-09-2008, 08:22 PM   #24
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Originally Posted by Joe Perez View Post
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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