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Injector Sizing and other

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Old 08-02-06, 01:07 PM
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Injector Sizing and other

Looking for some clarification on this:
1. For higher HP levels ( say 350 reliably) with stock twins i was told change the secondaries to 1300's OR run 4 850's?


2. Cheapest rebuild kit dealer?
Old 08-02-06, 11:21 PM
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1. Either will work 4 850's will be easier to tune and give you better street driveability. I have around 350 RWHP w/850's.
Old 08-02-06, 11:32 PM
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Id just go with 1300 secondaries, 850s in the primary rail can leak if not properly done and a car ive seen with them runs pretty rough.
Old 08-03-06, 04:22 AM
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whats the most common setup?
Old 08-03-06, 08:40 AM
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ok...the debate continues....anyone else?

Also any help locating the cheapest Rebuild kit ( all seals and gaskets)
Old 08-03-06, 01:05 PM
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so at what horse power / boost level do the injectors need upgrading??? /// at what level also do you need a fuel pump upgrade sorry to butt in ..
Old 08-04-06, 08:50 AM
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i believe for anything reliable above 350
Old 08-04-06, 09:31 AM
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Originally Posted by FLA94FD
1. Either will work 4 850's will be easier to tune and give you better street driveability. I have around 350 RWHP w/850's.
What are your Power FC settings for the 850cc's? I cant seem to tune out idle and crusing w/ my 850cc's. My driveability sucks w/ them.
Old 08-04-06, 11:38 AM
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JhnRx7 do you have datalogit?
Old 08-14-06, 02:04 AM
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This is my exact situation, too. With 1300cc injectors in the secondaries does one need any additional fuel pressure regulator for the 13's to be streetable?
Old 08-14-06, 08:58 AM
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http://www.gothamracing.com/catalog/...roducts_id=864

or

http://www.gothamracing.com/catalog/...roducts_id=865

FWIW, I have been running 850cc primaries for about 4 years now with no problems.

JhnRX7, next time I see my FD (about a week) I can copy down my injector settings/pulse width etc for you if you like.
Old 08-14-06, 09:33 AM
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so th e4 850's handle your mods easily?
Old 08-14-06, 10:23 AM
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Yes, I have a Datalogit.

The 850's handle my mods with out a problem (non sequential, full exhaust, intake, intercooler, heavily ported motor, 14lbs of boost), ive just been having trouble w/ crusing...
Old 08-14-06, 11:29 AM
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Originally Posted by PBK7
so th e4 850's handle your mods easily?
Not sure if this is directed at me. I run 850s and 1300s, and it's just enough for 420 rwhp on my setup. Keep in mind I made my power on a dynapack, which reads low. If I ever get to a dynojet I expect to see 450ish rwhp at 18 psi.
Old 08-14-06, 02:45 PM
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Originally Posted by PBK7
Also any help locating the cheapest Rebuild kit ( all seals and gaskets)

http://ausrotary.dntinternet.com/for...light=cheapest

...This is about $1350 US...has everything, including bearings and oil ring cases, genuine Mazda...I never bought from them before....

For sale: SER 6 REBUILD KIT

Item Condition: ALL GENUINE MAZDA PARTS , BRAND NEW
8 x OIL CONTROL RING SPRINGS
8 x INNER AND OUTER OIL CONTROL RING "O" RINGS
8 x OIL CONTROL RING CASES
12 x SIDE SEALS
12 x SIDE SEAL SPRINGS
12 x CORNER SEALS
12 x CORNER SEAL SPRINGS
6 x APEX SEALS
6 x INNER & OUTER APEX SEAL SPRINGS
2 x ROTOR BEARINGS
2 x STATIONARY BEARINGS
1 x FRONT MAIN SEAL
1 x REAR MAIN SEAL
1 x COMPLETE GASKET SET
Price and price conditions: $1825 + freight
Old 08-14-06, 02:53 PM
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Was wondering if I'd ever get a response to that part of the thread.
Seems pricey compared to ATKINS @ 1200USD
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