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Jacobs new SDD fatman fuel rails

turbocharged406sbc

turbocharged406sbc

New member
made to order for his insanity... i mean GP:th_laugh-pointup:
.780in ID (-10 an) with -8 fittings
frontview.jpg

SDDfatmanrails-8anfittings.jpg

rearrail.jpg
 


how much you guys charge for the fuel rail. i was looking at your web page and can't find any other information on it.
 
silverbullet said:
how much you guys charge for the fuel rail. i was looking at your web page and can't find any other information on it.
Click to expand...
right now they are made to order there are a few options and the "bolton" sets are still having the small kinks worked out, but they will have the OE FPR mounted to the front rail to use the factory vac lines.
i personally would prefer everyone delete their plastic fuel lines and run an aftermarket FPR like erics riv, the 442, and the dragwhore.

pricing is still being worked out but the goal is a bolt in set for ~375$ or less, plumb yer own sets for significantly less than that...
 
DDDDRRRRRRRRRRRRRRRRROOOOOOOOOOOOOOOOOOOOOOOOLLLLLL!

cannot wait till they ar on the car! see you guys saturday!!!
 


What I cant understand, and not to bash on them, but ZZP built their rails from the ground up, why in hades could they not use factory mounting points?

I am certainly ready to plumb my own. My intention is to run ss braided line from the pump all the way up to the rails. Be sure and post up or PM me when your rails are ready to be purchased. I will have to somehow find the money to get a set cause I am not eager to go back to the factory rails.
 
parallel or series flow?
for flow the rear rail is best without the EGR the rear rails for cars with EGR have two 90* fittings. since many dont run egr the majority of this batch are egr delete apps.

if your going parallel flow the remote FPR housings i have have two inlets and the return out the bottom, they can be bolted to the firewall of drivers side fender.
for the series flow bolt on kits the FPR housing is welded to the front rail with the FPR vacum fitting in the OE location (we've gotten many requests for OE vac line placement)
while the bolt in kit will have the OE fittings its readily made to run full An adapted from the OE hardlines.

if your planning on running an aftermarket fpr the plumb your own rails will be the best but you still have the option of a remote mount single/dual entry OE FPR housing.

the bolt in kits and the basic fatman rails will be sold through wbs
 
that would be cool!

VERY nice welds! now I have to find out if I still have the stock mounting nuts...lol.

I believe these will even out flow PRJ's.
 


First off, I like it, Looks Bad Ass, but I gotta ask "why" ??? -10AN Rail with -8AN Supply/Return connections ... Is it just for the look? I think ZZP claims 1000hp with the -6 connections. The PRJ rails use -6 as well.
Does it server any actual function to go larger? Is it just easier to weld? They gotta be more expensive (even if only slightly) then smaller sizes.
 
Great post James,


We may Stop up there for a little while with the whole SDD crew but we will have to see about bringing samples.

We will keep you guys up to date on when they're available and the price. I dont want to rush somthing and have to make 7 revisions on them. We are near a final design and we are building up a good number of units to keep stock.
 
GTP2K1 said:
Does it server any actual function to go larger? Is it just easier to weld? They gotta be more expensive (even if only slightly) then smaller sizes.
Click to expand...

Larger rails are able to flow a LOT more fuel, the last thing you want to do after shelling out all the money for the engine is starve it for fuel.

welding in my opinion...is better.

anybody can just drill and tap a piece of pipe and call it a day.

its the attention to detail, the way the welds lay over each other...its much better made.:th_thumbsup-wink: you can tell a lot of time, and effort went into making these.
 
GTP2K1 said:
First off, I like it, Looks Bad Ass, but I gotta ask "why" ??? -10AN Rail with -8AN Supply/Return connections ... Is it just for the look? I think ZZP claims 1000hp with the -6 connections. The PRJ rails use -6 as well.
Does it server any actual function to go larger? Is it just easier to weld? They gotta be more expensive (even if only slightly) then smaller sizes.
Click to expand...

I would think the major limit in the fuel system would be the lines running from and to the fuel tank. But then again I have never really paid much attention to what size they are.
 
GTP2K1 said:
First off, I like it, Looks Bad Ass, but I gotta ask "why" ??? -10AN Rail with -8AN Supply/Return connections ... Is it just for the look? I think ZZP claims 1000hp with the -6 connections. The PRJ rails use -6 as well.
Does it server any actual function to go larger? Is it just easier to weld? They gotta be more expensive (even if only slightly) then smaller sizes.
Click to expand...

when you go with a big build, good fueling is essential. not just overall fuel flow (bigger pumps and feed/return lines accompanied with a high flow fpr) but also consistent fuel pressure at all rpm's.

with the much larger volume of fuel in the rail that the injectors draw from you end up with less pressure fluctuation than a small resevoir. at the same time the speed at which the fuel flows past the injector inlets is greatly reduced (esp in a parallel flow arrangement) reducing the fuels inertia, and allowing it make the turn into the injector inlet, the rail fuel inlets are positioned for a more gradual turn into the injector at the same time.

fuel pressure pulsation is the enemy, it affects the fuel available to the adjacent fuel injectors and prevents accurate, repeatable fueling cylinder to cylinder. the SIII (L26/32) fuel rails are returnless systems that are even more sensitive to pulsation and its effects on fueling (GM has spent a good amount of time and money on this stuff) the dampners used in the SIII rails have 8 times the active surface area to dampen pressure fluctuations than the 99+ SII rails. as well as the SIII rails having a larger fuel "resevoir"

the -10 fatman rails have enough volume in each rail to allow the use of SIII dampners and still flow the same as the -8 rails. perfect for those builds that have injectors that flow enough to still have needle bounce.

i experienced these effects first hand with the whippledRiv...we had it running on modifiedL67 rails for a couple weeks while i finished the prototype -8 rails. when we installed the rails (with no other changes) we had the LTFT's change in the 2800-3100rpm and 4600-5000 ranges by a good bit (higher range was off by 6%) we actually had to pull fuel to bring the trims into line. i also experimented with the injector aiming and its effects on the fuel trims, i have a couple theories to try out on a dyno before i go making recomendations but there may be top end power to gain from biasing the injector spray pattern towards the inside wall of the intake port/valve.


Andrew_99GTP said:
I would think the major limit in the fuel system would be the lines running from and to the fuel tank. But then again I have never really paid much attention to what size they are.
Click to expand...

actually its the OE fpr, the return orifice is the highest restriction, with a high flow pump it will not allow for the fuel volum to bypass back to the tank resulting in the orifice being the restriction instead of the regulator seat. the OE lines are for stock and mostly stock fuel systems but do not allow for the volume of larger systems, the weldon 2035 used in the WhippledRiv REQUIRES -12 sump to pump and -10 pump to rail plumbing with no smaller than a -8 return. the 2045 used in the dragwhore recommends even larger for better efficiency.
 


Wow good reading, thanks for the long winded answer. I didn't expect to get a solid answer like that. But once I started reading I was kinda expecting the word cavitation to turn up in there. But I think I see how it would be lessened or prevented, when you were talking bout the fuels inertia an path into the injector.
Thanks
 
That was very interesting James. I guess I will be running all new fuel lines this coming winter, or whenever I install an after market fuel pump. So when are these going to be for sale ;)
 
Those look really nice, and your tempting me. :th_thumb-up: Better looking than the ones that are currently out there. A little over kill, since no one has even maxed out a set of stock fuel rails, but who cares, the looks make up for everything else.

I might even install them, and remove the factory supply and return fuel lines and go stainless steel braided as well from the pup to the motor. Plumbing AN lines is nothing new to me. I was one of the few to get the INTENSE remote oil filter bracket installed, and actually looking good and professional after I was done.

~F~
 
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