Head Porting+ Custom Efi Manifold

[irokin]

Brand new SARD 700ccs are only about $90 each ex japan. Other than that the biggest top feed low imp factory injector I can think of is GTRs (440cc) or maybe RX7 but they range from 460cc -> 680cc in both high and low impedance.

[tas_ae71]

brendo had some rx7 injectors

[Jason]

You can run all injector types off the ms :D

[tas_ae71]

this thing will cut a descent skid!

[flat out]

so guys to dummy up some injectors what should i use, gtr ones sounf like the go and a fuel rail type, r31 are fuelrail/hose/injector type but would be easyest to obtain, any one know what size v6 commodore ones are and if they will dummy up well?

[Jason]

There was a great site with injector pics and specs on all nippondenso injectors, trying to find it again. Lost it when formated :D

[oh what a nissan feeling!]

any one know what size v6 commodore ones are and if they will dummy up well?

 

commo run a 13mm head, most jap stuff is 11mm.

 

Gti-r pulsar are 440 as well, they seem to pop up pretty cheap?

 

I would probably try to stick to 11mm tops, just cos theres more options that way.

[Taz_Rx]

This the page you speak of Jason?

 

http://autospeed.com/cms/A_0102/article.html?popularArticle

 

13bt injectors are 550cc and there's 4x of them.

12at injectors are 880cc as there is only 2x.

 

Common upgrade for 13bt's is to replace the secondary (or all) injectors with the 880cc items, hence there is always 550cc's for sale everywhere.

 

7MGTE injectors would be a good size at 430cc.

 

As for the fuel rail. I think you may be better off measuring the port spacings of the 3t, and see if you can't find a similar sized 4 cylinder with a rail you can use as is.

 

Would Jamie (Q's bro) have some sort of T series fuel rail laying around still?

[Jason]

It had all the info but thumbnails of the injectors them selves !

[SeptemberSquall]

Yo,

 

What displacement are you planning to run?

What compression?

What cam timing and intended power band?

What application? Fast road, khana, rally, hillclimb, circuit? <--- tick all that apply

 

if you're running <1800cc and <7000rpm i would be hesitant to open up the ports and bowls too much

you don't want to compromise intake charge velocity, fuel dropout and poor VE (lousy cylinder filling) can result amongst other things

 

you definately won't need to worry about meat in the head around the ports and bowls for your app on 3T-C head unless you're trying to take heaps out for:

> very high rpm

OR

> serious forced induction

OR

> serious displacement increase

OR

> combination of the above

 

hope this helps

 

as for running injection, i'd be getting a redline dual DCOE manifold, efihardware.com or injection perfection throttle bodies/fuel rail kit, and going that way for fuel injection on your project

all off the shelf, bolt up and someone to go back to if it winds up smegged. going custom yourself means your dick in your hand if something goes wrong and can be more expensive than just buying the right stuff in the first place.