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Old 02-05-2019, 06:34 PM   #126
Snow_Shovel
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Not sure if this is what you were looking for. But like i said, its a two piece rail. Height off of the manifold Id assume be the same given standard top feed sizes. Length is about 6 without AN fittings. Width is 3/4.
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Old 02-07-2019, 02:24 PM   #127
Scargod
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Default Looking for Cosworth-like fuel rails to modify!

Snow_Shovel,
I appreciate what you have done, but just realized that your fuel rail is specifically for the stock NA intake. Mine is modified to accept any top mount fuel rail for an EJ.

In reaching my goal of no manifold spacer, I only have the front end of the fuel rail fitting's interference with the banjo for the AVCS solenoid valve to deal with. I don't think any stock rail will clear it. They won't because the fuel manifold part is too low. It doesn't have to be but all seem to try and stay compact.
My solution is to move the fuel fitting from the front end of the rail to the top. Then I shorten the end to clear the banjo and banjo bolt.
What I need is a fuel rail that is smaller in width than Radium's and cheaper than Cosworth's. They must be good quality, one piece, machined aluminum rails!
Something like this fitting gets welded to the top, facing rearward.



This is of interest to me and should be to others who would like to take advantage of the benefits of reversing the intake and not having the hood clearance issues that spacers cause.
As I have said, and somewhat duplicated on the Reversed Intake Manifold/TB Thread, this is how I am running rails currently while using 13mm spacers. Dampers are on top.
The other image shows how I changed out the hex-head #6 bolt to a flathead bolt for clearance. I was able to force the connector on. It was also taken before I added the Radium dampers.
You can see how I will run into interference issues with the oil banjo and the solenoid connector if it were lowered more. This is why I will clock the connector so it will be lower and removing and and relocating the retaining point for the solenoid.

Last edited by Scargod; 02-08-2019 at 09:40 AM. Reason: Added pics, link and info
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Old 02-07-2019, 03:14 PM   #128
Snow_Shovel
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Default using an NA intake manifold.. what rails to use?

What if something like these would fit your bill. Seeing as they feed and return from the same side. Then you may not have the fitment issues of that port.

https://www.maperformance.com/produc...BoCyisQAvD_BwE

Id love to not have to run a spacer and be able to forward face my manifold. Im running a remote mounted turbo in order to eliminate some charge piping. It would be rad to eliminate even more.
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Old 02-07-2019, 06:12 PM   #129
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I've had Boomba's on my engine, earlier on, when I ran a stock STi manifold.
They will not work for at least one reason. They are identical parts so, while the right, turbo side pointing away from the turbo is great, because the fuel lines are routed away from the turbo, the fittings end up being over the banjo and banjo bolt on the right side. I might could remove material on the right side and weld that up, but relocating the fitting on the other end is problematic because of having to add a fitting to an area where there is little material. Not enough there to cut threads. However, I might be able to weld on a fitting, so not much different from the other idea.
I will hold off for hopefully a better part to work from. I prefer the smaller form and I'd prefer that fuel not have to do a 180 turn at the end.
It just hurts to pay big bucks for a Cosworth set only to cannibalize them. I will be adding dampers to whatever I use, just like the Cossie's on the car now (with 13mm spacers).
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Old 02-07-2019, 06:29 PM   #130
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So both those rails are identical? Like not symmetrical (rear exiting in both left and fishy runner side)?
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Old 02-08-2019, 09:32 AM   #131
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Yes, both Boomba and Perrin and, for that matter, all fuel rails that I am aware of are identical for each side. No unique left or right.
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Old 02-08-2019, 01:16 PM   #132
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Seems like a stupid way to build a rail that feeds and returns from the Same side of the rail. Unless you plan to run in series, but who does that.
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Old 02-09-2019, 10:35 AM   #133
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Quote:
Originally Posted by Snow_Shovel View Post
Seems like a stupid way to build a rail that feeds and returns from the Same side of the rail. Unless you plan to run in series, but who does that.
I don't see it as stupid. Both designs have their merits and to some degree I favor the Boomba design. A fuel rail where the turbo side fittings and lines stay away from the turbo is great, and on the left side you save some in fuel line length and the install can be cleaner by having shorter return lines on the left and not looping the line back from the front.
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Old 02-09-2019, 03:07 PM   #134
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Here's where I am now, with this mockup. Plugging and relocating the bottom inlet/outlet. Replacing a nipple with AN fitting.


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Old 02-15-2019, 03:16 PM   #135
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Default Using STi fuel rails with no spacers

A change of direction. The stock, late model STi fuel rails have the least amount of interference of any rails tried. Since I am unlikely to exceed 500 WHP I am going to try modifying the STi rails. There is a significant blockage with stock rails where they are rounded on the ends of the tubing. That crimping to make the tubing end rounded creates a 39% blockage of the tubing ID. BTW, the feed line from the gas tank has the same blockage issue! Reducing the blockage in four places really opens up the potential of the stock rails.
I am looking forward to finalizing a new fuel rail design so I can have some made in aluminum. They should eliminate some or all of the customization, that I note below, that has been required to the cylinder head's bracket for retaining the solenoid valve.

I reworked the solenoid bracket to take an Allen drive, flat head screw. I then shaved about 3/16's of an inch off the height of the arm that sticks up and accepts the screw.
To clock the connector out of the way of the fuel rail I ground away the crimped steel which determines the orientation between the solenoid and the valve body. I used a small carbide burr in a Dremel tool to grind out the crimp rather than disturb the valve by prying at the crimped spot in the sheetmetal. Grinding away the steel crimp allows you to use a wrench on the flats at the end of the valve body and rotate the valve about 25. Holding the solenoid body in soft vice jaws makes it possible to swivel the valve without too much effort. Then you re-crimp the edge of the steel housing into the dimple as before. On installation, you have to reshape the bracket a bit due to the clocking.
As to the fuel rail itself you will immediately notice that I welded on ears to the intake to accept any top-feed fuel rail. This positioned the cups that accept the injectors too high. Were it others, they usually have spacers that can be adjusted. I cut the mounting bracket off the fuel rail and rewelded it with it positioned an 1/8" higher. This made for a better fit on the injectors and allows the use of a shimming washer if needed. I made a jig for this repositioning that used my aluminum dummy injectors to hold the rail and two pins to locate the mounting bracket. Once tacked it was easy to weld. These rails will be good for 500 HP, no sweat. They don't have the restrictions that the rest of the stock fuel line assembly has.

6AN SS nipples are ordered. To finish the hard portions of the fuel lines I will weld them to the ends of bent 3/8" SS tubing and splice them onto the stock tubing. The old stock rails barely clear the banjo bolt and banjo, but they do!
I'm very pleased with the results since I can just use a normal gasket without phenolic spacers.
I won't have any hood interference issues. I'll have the intake rotated, so lessened turbo lag and have the high-end benefits of the larger plenum and longer runners.


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Old 02-15-2019, 03:21 PM   #136
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Theres longer fuel injectors too
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Old 02-15-2019, 05:44 PM   #137
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Quote:
Originally Posted by no694terry View Post
Theres longer fuel injectors too
I may look into that. Thing is, I have ID 2000's sitting here and two other cars that need larger than 1000 cc's. This is my second car with a reversed NA intake and I'm trying to keep everything as standard and interchangeable as possible.
For others, jacking up the fuel rails with taller injectors and spacers for the rails might be a good solution.
I want to design and offer new fuel rails that address all the issues that running an NA long runner manifold causes. The NA's are plentiful and work well for the budget racer that can work with and adapt them.
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Old 02-16-2019, 06:35 PM   #138
Snow_Shovel
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What AVCS solenoids are you guys using with the rear facing plug rather than vertical? I took a shot in the dark and ended up with some that arent quite right. Using Ver 8 EJ207 heads if that makes a difference.
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Old 02-17-2019, 05:53 AM   #139
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I'm no expert since I've never intentionally ventured below 2007 STi, or V9. I have a pair like on the right that I think came off a friend's '15 STi. It's shorter and doesn't look interchangeable. I've never seen one with a vertical connector. All mine look like what I posted (except for my mod) and are interchangeable except for bracket orientation. You can even take an exhaust solenoid from a DAVCS and cut one side off the bracket and use it on top. There is no left or right (or intake or exhaust) except for the retaining bracket.
BTW, when using an exhaust solenoid on top: snips will cut the metal bracket. I drill/Dremel out the spot weld on the unwanted side and pry the bracket off.
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