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Power FC upgrade Primary or Secondary injectors??

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Old 06-17-03, 01:16 AM
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Pimpin Rotors...and Hoes

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Question upgrade Primary or Secondary injectors??

The setup on my new engine will be as followed: all bolt-ons with a big street port, Power FC, and walbro high flow. Should I go with bigger primaries or just upgrade my secondaries. I will be tuning for 12 psi. max boost. on stock twins. BTW, I have done a search, but would like some more opinions on this. Thank you
Old 06-17-03, 12:26 PM
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apeiron

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Primaries are fine. All you need to do is upgrade your secondaries.


Lemme know whats going on with those 550's as well... Im waiting on you
Old 06-29-03, 06:39 AM
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Hi Ted,

yeah, at only 12 psi you'll be ok w/12 or 1300 secondaries and stock prim's. Here are some good links to find out if your injectors and punk will support your horsepower goals:

http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

and

http://www.stealth316.com/2-fuelpumpguide.htm

take it easy--
Old 01-17-06, 10:59 AM
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Now that I have a PFC, and some extra 850cc injectors, plus a tuning day setup with Steve Kan, should I install 850cc injectors in my primary, or just skip it, and go to 1300cc in my secondaries ?

I'm thinking about 12-13psi of boost on the stock twins max.

This is for a daily car, that I use on track days and on autox.

:-) neil

Here's my current setup:

NEW engine with 5K miles on it
ARC SMIC
'99 SPEC intake duct with STOCK airbox
Supra TT fuel-pump
Efini Y-Pipe
JDM downpipe (no pre-cat)
High-flow metallic cat w/air-tube
Magnaflow resonator
TRUST muffler
PFC with RX7Store base tune for above (injectors at 80% duty-cycle at WOT)
currently idle surges when below 40-F, otherwise fine
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