Injector question

LaserSVT

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Nov 29, 1999

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Sep 18, 2007

#1

• Sep 18, 2007

• #1

When I get my KB 2.1 twin screw will I need to get bigger injectors with 6 lbs of boost or be safe and get bigger ones? I figure if so I would do it at the same time so when I get the KB chip with the blower I can have it programmed for the same size injectors. Also how much HP can the stock MAF handle before it pegs?

Thanks one and all!

 

blkhorse

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Oct 30, 1999

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Sep 18, 2007

#2

• Sep 18, 2007

• #2

If your buying the kit from KB, it comes with injectors. should run 36lbs min. The KB website site say's the stock maf pegs at about 400 rwhp

 

RedBullitt

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Morgantown WV

Sep 18, 2007

#3

• Sep 18, 2007

• #3

lol you wont keep it at 6psi for too long... but if you go with the kit blkhorse is right. might want to consider a lightning or jlt maf or maf extender if you can afford it.

 

LaserSVT

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#4

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The 96-98 Cobra kit does not come with injectors, only a boost-a-pump. I figured on getting a Lightning MAF at the same time, since I will get the two tune chip I can have it programmed for the Lightning MAF and injector size. I figured to save money now if I could use the stock injectors and down the road when I change the pully then I will get bigger injectors. Anyone know how much boost a stock block can take with a good tune?

 

R

RoskiStang

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Sep 12, 2007

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Alabama

Sep 19, 2007

#5

• Sep 19, 2007

• #5

i hear a lil over 400... i dont think id boost it more than 8 lbs with a KB.. ive heard they are a lil harder on engines than centrifigauls

 

blkhorse

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Sep 19, 2007

#6

• Sep 19, 2007

• #6

I would not chance the stock injectors,save money now, risk detonation/lean condition, pay much,much more later. you can find 03-04 cobra take outs pretty cheap.

 

LaserSVT

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#7

• Sep 19, 2007

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blkhorse said:

I would not chance the stock injectors,save money now, risk detonation/lean condition, pay much,much more later. you can find 03-04 cobra take outs pretty cheap.

Click to expand...

I was thinking the same thing, arnt Terminator injectors 42lbs?
Will that support me to 9psi on the blower?

 

blkhorse

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Sep 19, 2007

#8

• Sep 19, 2007

• #8

I think they are 39's. the 9 psi KB kit comes with 36's(some are 38's). I have the 38's and work well

 

LaserSVT

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#9

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blkhorse said:

I think they are 39's. the 9 psi KB kit comes with 36's(some are 38's). I have the 38's and work well

Click to expand...

I think what I will do is just get the 6lb kit with the chip for 3800, and after I get bored with it I will get the 9lb pulley with the larger MAF meter, 42lb injectors, a large fuel pump (not sure which one) and send the chip to KB for a reprogram.

blkhorse, did you start with the smaller kit? If so how much hp were you putting out, and how much do you have now?

 

blkhorse

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Sep 20, 2007

#10

• Sep 20, 2007

• #10

I went with the 9 psi intercooled kit,have not had it on a dyno, but it Rocks!!!

 

LaserSVT

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#11

• Sep 20, 2007

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blkhorse said:

I went with the 9 psi intercooled kit,have not had it on a dyno, but it Rocks!!!

Click to expand...

KB says they dont make an intercooled system for the 96-98 Cobra Must be the red head bastard stepchild

The tech told me he does not recommend going above 7-8 psi on their system and the setup is just right at 6 psi so that I dont need larger injectors, which makes me ask what size are the stock Cobra injectors? I want 400 rwhp and I want a twin screw b/c of bottom end torque. Does anyone else make a screw for tyhe Cobra? I cant afford alot ($4000 max) so twin turbo is out and I just like the KB. I guess down the road when I do a rebuild I can lower the compression and put a smaller pully and get more boost. It just seems with what I have and if I get the 8 lb pully and larger pump and injectors I should be right @ 400 rwhp.

 

blkhorse

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Sep 20, 2007

#12

• Sep 20, 2007

• #12

don't know much about 4v interchangability,but won't a 03-04 cobra intercooler work?.even if it does,I think you would need the later KB kit