Question for KA and Sr fuel rails

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s13drft89
Posts: 498
Joined: Mon Jul 25, 2005 2:41 pm
Car: 1991 Twin Turbo 300zx & 1968 Mercury Cougar

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Hey, I tried to search but got nothing, well heres the situation, my buddy has got a sr20 top feed fuel rail, he's willing to give me. My question is that will the injectors line up into the KA fuel rail? Iam planning on going bigger, injector wise. Also does anyone know whats the max a safc can handle, I see some guys run on 550's but they are all the way down at -50. After the first 2k miles of the fresh rebuild iam planning on running around 12-14 pounds. Thanks for any input given-Ricky


ghx407
Posts: 517
Joined: Fri Nov 24, 2006 12:59 pm
Car: 1993 240SX KA-T

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I don't know if a top-feed SR rail will line up with the KA's injector ports. But you can find side-feed 550s (from Z32s, I think) that will drop and plug right into the KA rail and harness. The most an SAFC can handle properly on a KA is about 550s, but I've heard of people doing up to 740s.

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tiger
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Joined: Tue May 03, 2005 3:28 pm

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nah the SR rail will not fit on the KA..I tried.. haha.

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s13drft89
Posts: 498
Joined: Mon Jul 25, 2005 2:41 pm
Car: 1991 Twin Turbo 300zx & 1968 Mercury Cougar

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lol, thanks actually what I wanted to do was 480cc(sidefeed) and call it a day. But since my buddy had a top feed fuel rail, just thought that would have been a better choice. Also in the z32 "300zx" they are 370's. Thanks for your input-Ricky

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hannibal
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Joined: Wed Sep 11, 2002 2:38 am
Car: Red Line to Glenmont
Location: Washington DC

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Yep, the Z32 twin turbo uses 370 injectors. Only the later type (95-96) fit the KA rail though.Wait, I'm not sure if you were asking or correcting ghx. I think he means that injectors for the VG-TT can fit the KA rail...

Check out deatschwerks.com for a good deal on injectors...

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s13drft89
Posts: 498
Joined: Mon Jul 25, 2005 2:41 pm
Car: 1991 Twin Turbo 300zx & 1968 Mercury Cougar

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Yea thats what iam using now, reason for bigger injectors is because I was to put more punds roughly around 12-14lbs, on a GT28rs (disco potato). thnx


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