which manifold?

[MRJLB84D]

as some of you may know, ive been having a custom inlet manifold made which is slowly getting there!

thing is, ive been given a complete XF injection setup which i might use until the custom one is done but how do i block the injector holes for when the LPG is fitted?

how many litres is the XF plenum?

 

[xctasy]

2.3 liters from the throttle body to the inlet port gasket. There are 12 runners 1.4" in diameter, and there is a merge plenumb above the rocker cover which adds another scooner to things. Most custom ones are 6.5 litres or greater.

If you go too big, you loose low end torque, but gain high end power. The turbo comes on at a different level. Restiriction the flow makes a given turbo spool in at a different rpm, and the growth of boost changes. You notice a lot more lag with a big plenumb.


Somewhere between the two sizes is best. Looking at yours, it should be about 5 liters.

Don't go to big now!

 

[MRJLB84D]

hehe with mine, it was just a case of what my mate had layin around his work and no science put into it hehe

if it works it works but least ill have the STD setup which ive seen a lot of these turbo xflows run with good results

just a matter of blocking the injector holes, how do i do that!

 

[xctasy]

Get a Bosch injector, and have

a) an o-ringed bung machined up out of aluminium stock. All o-rings are made to suit the common (Type 2?) Bosch injector, so you have to make one up.

b) Or peen lead shot into the slot. Go and find an iron outhouse with lead had nails, and melt the nails up with an oxy torch, and drop it into the holes on the rail.

c) There are the six notches on the 34 mm intake ports, where it looks like a rat-hole fill has been let loose. Here, the alloy head port itself can be welded up, or Devcon(JB Weld can be held in place with a snapped a 1/8" roll pin to stop a chunk ending up in the chamber.

You should leave it all there, and wack alcohol into them.

In my home back in Alexandra, the bogans used to fill up there Falcons and Holdens with six mates, with one sover driver. They'd hook up a covert alcohol line into the roof and floor from two washer bottles. Thats enough for a pile of alcohol. Cops had a total liquor ban, and they couldn't figue out why the old Falcons were never stopping off, had no beer in the car, but had increasingly off yer face possums in them.

My proposal is toleave the bungs there add six EFI injectors, use a Gasser styler MoonAlcohol front tank, and add some Jack Daniels and use 10% on anti detonation, and the other 90% on keeping your pasengers happy! You'd be the sober driver, but you'd have more fun that way!

Officer Flossey"You been drinkin boy?"

Dave "Nah, but my cars had a six pack and runs better the more it drinks".

 

[addo]

Just get a BSP tap and six BSP plugs to suit. Spray the tap with WD-40 during threading to avoid ripping up all the newly chased thread, and back off every 3/4 turn before proceeding, to break the chips.

You can buy NPT taps almost as easily but you'll then need NPT plugs which means Pirtek or similar, and more $$$. They're not compatible with BSP threads.

 

[DYNOED250]

pretty sure the guys around hear just use really small welsch plugs :>

 

[xctasy]

Oh yeah, but that's simple. Douh!

 

[MRJLB84D]

pretty sure the guys around hear just use really small welsch plugs :>

u can get them that small!?!?!?! ill have to look into it, simple and easy, too good to be true as it never seems to be the way

 

[MRJLB84D]

well, finally got the flange made up for the new manifold, just needs some final adjustments and bolt holes drilled but its almost there! will hopefully get pics on here in a few days