4.0 Fuel Rail on a 2.9

[DPDISXR4Ti]

As I'm gradually getting rid of the parts from my disassembled 4L OHV engine I come up with various (crazy) ideas. Yesterday I was noticing how much nicer the 4L fuel rail is vs. 2.9. I've had a couple times where the 2.9 rail didn't seat quite right and leaked, so it's a valid concern to look for a better solution. I must confess I haven't really studied this idea much - just throwing the idea out there in case someone else has already explored the concept.

I figure it would require either custom machining to the 2.9 intake and/or adapting the 4L intake to the 2.9.

Discuss....

 

[kodogtwh]

I've never had an issue getting mine to seal. Never really needed extra flow either. Even with the ignorant levels of boost I feed it.

 

[bobbywalter]

Easier to make custom rails

Raw Dash 6 Fuel Rail Extrusion Sold by the foot! RMR-019 | eBay

Dash 6 Fuel Rail Extrusion. The extrusion is made of 6063 T-5 aluminum.

www.ebay.com

The reason it sux to nipple up the rail is that the injectors are inline. The 4,0 deck height allowed for different spacing all together and is still a pia. There are square tubes that work better too.

 

[DPDISXR4Ti]

It's certainly not a critical need I'll readily admit, so I'd never bother with fabbing up custom rails. The 4L rail is a totally different approach vs. the 2.9, so it's probably pie-in-the-sky thinking. But I thought I'd throw it out there just in case someone is crazier than me.