Fuel injectors from a TT into a n/a

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Luis300zxjr
Posts: 3
Joined: Mon Nov 19, 2012 3:34 pm
Car: 1990 nissan 300zx

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I'm taking apart my 1990 Nissan 300zx. I'm replacing my injectors, but am confused about the new injectors I got. They fit a Z,TT.. But also a n/a. And I know they throw out different cc's.. Dose anyone know the out come of installing this injectors on a nonturbo Z?? Need help and info A.S.A.P!
Thanks, Jr :confused:


nissanfreak12
Posts: 1709
Joined: Sun Jan 23, 2011 4:07 pm
Car: 92 300zx 2+2 TT
Location: Denver, CO

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Don't install anything other than 270cc injectors in an NA, unless you get the ECU tuned to match, still it would be pointless. Installing could flood the engine, run like crap, eat too much gas, could be catastrophic.

Luis300zxjr
Posts: 3
Joined: Mon Nov 19, 2012 3:34 pm
Car: 1990 nissan 300zx

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Thanks... I got my baby torn down all the way and this is the only thing stopping me from putting everything back together ..

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t.mcginley.jr
Posts: 1547
Joined: Fri Jun 01, 2012 5:50 am
Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
Location: New Jersey, USA

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^ What he said. You'll run super rich if you put TT injectors in an NA.

Luis300zxjr
Posts: 3
Joined: Mon Nov 19, 2012 3:34 pm
Car: 1990 nissan 300zx

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I did call Z1.. And asked .. And they said the only wAy to know, is to do a flood test ... But I think I'm just going to return this and get the right ones ..

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t.mcginley.jr
Posts: 1547
Joined: Fri Jun 01, 2012 5:50 am
Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
Location: New Jersey, USA

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You would definitely run rich because the ecu is telling the injector to squirt using a certain voltage. On the NA, the ecu is assuming that injector is 270cc so it mixes the right amount of fuel and air. If you put TT injectors in, the ecu is sending that same signal to a 370cc injector and only mixing in the same amount of air, so your A/F ratio will be all messed up. You would probably end up burning up the O2 sensors and cats eventually.


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