450cc

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
RHCDrift
Posts: 15
Joined: Mon Nov 23, 2009 8:04 pm
Car: 180sx

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Hey guys just a quick question for anyone with some 450cc injector knowledge. I cant find much out there on people using them in a red top, but what kind of boost would they be capable of supporting in an SR. I have a 2860rs for a turbo, and all the other necessary supporting mods (fuel pump..blah blah)

I was hoping to snag about 16psi. Is this unrealistic for a 450cc?

Any info helps..Thanks


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Chris28
Posts: 3159
Joined: Sat Jul 14, 2007 11:18 am
Car: 92 s13 KA-T
Location: 757/919
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That's about the limit of those injectors. You will need something to handle the increased flow rate of the injectors, such as an SAFC or an ECU tune. I'm not sure how SR's like SAFC's, I know KA's are prone to blowing because they do not support timing adjustment.

Maybe post this in the SR section. The simple answer is no, you can not simply swap these in and expect it to run fine.

RHCDrift
Posts: 15
Joined: Mon Nov 23, 2009 8:04 pm
Car: 180sx

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ya ive got an safc2 and a central 20 ecu, adj fpr and all that stuff, i do know what im doing lol. I just wasnt sure what i could squeeze out of the injectors.

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Chris28
Posts: 3159
Joined: Sat Jul 14, 2007 11:18 am
Car: 92 s13 KA-T
Location: 757/919
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Okay good, you know what to do then. Those injectors should be fine for that much boost, but not much over. Get an A/F ratio gauge so you can tell if the injectors are getting maxed out as you turn up the boost.

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VirginiaPS13
Posts: 1073
Joined: Sun Mar 26, 2006 11:14 am
Car: 89 S13 Coupe
2005 Acura TL

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I was expecting to see 4wheelers or dirtbikes??

RHCDrift
Posts: 15
Joined: Mon Nov 23, 2009 8:04 pm
Car: 180sx

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feel better?


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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
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VirginiaPS13 wrote:I was expecting to see 4wheelers or dirtbikes??


Go big or go home..

Also, you can look for similar setups with that turbo and that boost level to find how much horsepower it should create, then use DW's injector calculator to find out the minimum you can use.

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VirginiaPS13
Posts: 1073
Joined: Sun Mar 26, 2006 11:14 am
Car: 89 S13 Coupe
2005 Acura TL

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RHCDrift wrote:feel better?
Much, Thanks!


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