2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

FD 850cc secondaries on a six port turbo?

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Old Jul 1, 2009 | 01:06 AM
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FD 850cc secondaries on a six port turbo?

will they plug right up using the stock n/a rails abd stock injector harness/plugs?
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Old Jul 1, 2009 | 01:11 AM
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No, fd injectors are side feed, while our injectors are top feed.

Also you need something to tune the injectors to take away fuel.
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Old Jul 1, 2009 | 02:09 AM
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damnit.......

Thanks.

I was flipping through an issue of turbo tech and saw that fd's use that size secondary. didn't specify top or side feed. homoness.
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Old Jul 1, 2009 | 12:46 PM
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If you want bigger injectors to run your 6 port turbo, run the fb injectors.

There 680cc, and peak and hold. (Low imp)

What are you using to control the fuel? Also upgrade fuel pump, if you haven't yet.
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Old Jul 1, 2009 | 07:10 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by Aaron Cake
FD seconary injectors are top feed. They fit right in, but the connector is the round style.
no they are not. FD uses 4 side feed injectors.
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Old Jul 1, 2009 | 07:25 PM
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^uh oh someone chime in on this
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Old Jul 1, 2009 | 07:25 PM
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Ebay fd's secondary's

http://cgi.ebay.com/ebaymotors/FD-Ma...Q5fAccessories

^^ Side feed.


I already looked into fd injectors for my 6 port turbo.

http://cgi.ebay.com/ebaymotors/93-95...Q5fAccessories

^^ Injector itself.

http://cgi.ebay.com/ebaymotors/550cc...Q5fAccessories

Fuel rail from fd with both injectors. So I stand by side feed.
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Old Jul 1, 2009 | 07:35 PM
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Originally Posted by j9fd3s
no they are not. FD uses 4 side feed injectors.
I just searched to prove I am not crazy, and it appears that I am crazy. Correct, FD secondary injectors are side feed. I deleted my post which contains wrong information.

I must have been thinking of the 13B-RE.
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Old Jul 1, 2009 | 07:37 PM
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It's already been corrected, but here's a page out of the '93 FSM:


Scanning through some of the posts in the 3rd gen forum, it seems there are some aftermarket rails for top feed injectors available for them too.
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Old Jul 1, 2009 | 07:44 PM
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The 13B-RE is the one with the weird injector combo. I think one set is top feed and the other set is side feed?
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Old Jul 1, 2009 | 07:48 PM
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It's most likely that's where the confusion is.
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