Fuel rails question

[Hart_Rod]

I'm going to buy a set of fuel rails for my 6.2/Magnacharger and was wondering if anybody had any thoughts on the following fuel rails:

Aeromotive:

http://www.summitracing.com/parts/aei-14115

Holley:

http://www.summitracing.com/parts/hly-534-209

The Holley ones are a $100 cheaper and I really like the black, but I want to make sure they will not hinder the performance of the 6.2 with the Magnacharger. Thanks in advance.

[Wasted Income]

You linked to the same rails, for both web links.

What fuel supply line are you running to the rails?

I run those Aeromotives, with a -10 to the engine bay, where it splits to dual -8 lines into the back of the rails. Works well for me.

For the most part, fuel rails are fuel rails....they're pretty much all the same with the exception of the mounting provisions, and inlet/outlet size.

Also, what injectors are those? Are they stock length (really short) for the 6.2, or are they longer LS2 or LS1 style? That will determine which rails you get, since the mounting is different.

[Hart_Rod]

Originally Posted by Wasted Income

You linked to the same rails, for both web links.

What fuel supply line are you running to the rails?

I run those Aeromotives, with a -10 to the engine bay, where it splits to dual -8 lines into the back of the rails. Works well for me.

For the most part, fuel rails are fuel rails....they're pretty much all the same with the exception of the mounting provisions, and inlet/outlet size.

Also, what injectors are those? Are they stock length (really short) for the 6.2, or are they longer LS2 or LS1 style? That will determine which rails you get, since the mounting is different.

OOPPS!! Fixed it.

http://www.summitracing.com/parts/hly-534-209

I am running a 10 AN supply to a y-block, with two - 8 AN lines to the back of the fuel rails, crossover and FPR (what's the part number for yours??) and then an 8 AN return (pretty much like your setup, ). Good question on the injectors. They came with the supercharger and are supposed to fit the stock rails of a 07 Denali. Here's a picture:

[Wasted Income]

I'm running the Aeromotive 13109 regulator, which is dual -6 in from the rails, single -6 out for the return.

Those Holley rails should work nice if you swap out the -6 fittings for -8 fittings, at least on the inlet side. The internal diameter of the rail is 1/2", which is the same size as a -8.

[Hart_Rod]

Originally Posted by Wasted Income

I'm running the Aeromotive 13109 regulator, which is dual -6 in from the rails, single -6 out for the return.

Those Holley rails should work nice if you swap out the -6 fittings for -8 fittings, at least on the inlet side. The internal diameter of the rail is 1/2", which is the same size as a -8.

Thanks for the info! What Y block did you use? There seems to be a big variance in the prices for them. Is one better than the other? Also, what are your thoughts of this FPR over the one you are using? TIA

http://www.summitracing.com/parts/aei-13101

[Wasted Income]

Here is the fuel Y I used.
http://www.summitracing.com/parts/FRA-900611-RD

The regulator you posted should work fine. The fittings will probably be more expensive, to reduce down from -10 to -6 or -8, but other than that, it should work fine.

[Hart_Rod]

Originally Posted by Wasted Income

Here is the fuel Y I used.
http://www.summitracing.com/parts/FRA-900611-RD

The regulator you posted should work fine. The fittings will probably be more expensive, to reduce down from -10 to -6 or -8, but other than that, it should work fine.

Thanks! I appreciate all the help.

[BR3W CITY]

fwiw the injectors pictured appear to be the taller style EV1/EV6, not the typical MultecII shorty truck injectors.

[Hart_Rod]

Originally Posted by BR3W CITY

fwiw the injectors pictured appear to be the taller style EV1/EV6, not the typical MultecII shorty truck injectors.

Thanks!

[Hart_Rod]

Originally Posted by Wasted Income

Here is the fuel Y I used.
http://www.summitracing.com/parts/FRA-900611-RD

The regulator you posted should work fine. The fittings will probably be more expensive, to reduce down from -10 to -6 or -8, but other than that, it should work fine.

I finally figured out what you were talking about here and I agree, your's is a better choice. I also found this one:

http://www.summitracing.com/parts/aei-13129

Looks like the only difference is the color. Thoughts? Also, what fitting did you use to connect the FPR to the fuel rail? Where is your boost reference line connected? Thanks....again.....

[Wasted Income]

Originally Posted by Hart_Rod

I finally figured out what you were talking about here and I agree, your's is a better choice. I also found this one:

http://www.summitracing.com/parts/aei-13129

Looks like the only difference is the color. Thoughts? Also, what fitting did you use to connect the FPR to the fuel rail? Where is your boost reference line connected? Thanks....again.....

That regulator says that it only has one inlet...you need two in order to use the regulator to tee the rail outlets together.

I used this fitting to connect my regulator directly to the outlet of the Driver Side fuel rail. You may or may not have that option depending on blower clearance.

http://www.summitracing.com/parts/aei-15681

[Hart_Rod]

Thank you sir!

[BR3W CITY]

Hart, get this thing on the road. I need you to convince me that those top mount blowers do more than just heat the air up

[Hart_Rod]

Originally Posted by BR3W CITY

Hart, get this thing on the road. I need you to convince me that those top mount blowers do more than just heat the air up

Roger that! I'm doing my best. I'm just waiting on my wiring harness and then will need to tie up a few loose ends....

[Hart_Rod]

OK, so I got the Holley fuels rails (they are really nice!) but they won't work with the injectors that I have. I need some EV6 injectors that are about 1/2-5/8" taller...... Any suggestions?

EDIT: I wonder if these will work?? http://www.summitracing.com/parts/tfs-89960

[BR3W CITY]

I'm confused, the pink injectors didn't look like the Multec's that I had on the truck before switching, they were much fatter....but you say they are shorter than the ev6?

FIC injectors would often be my choice if going aftermarket.

[68GMCCustom]

thats a big added cost. can you just mount the rails lower by modifying the mounting points height or something?

[Hart_Rod]

Originally Posted by BR3W CITY

I'm confused, the pink injectors didn't look like the Multec's that I had on the truck before switching, they were much fatter....but you say they are shorter than the ev6?

FIC injectors would often be my choice if going aftermarket.

They are bosch injectors. What are FICs?

Originally Posted by 68GMCCustom

thats a big added cost. can you just mount the rails lower by modifying the mounting points height or something?

There isn't enough room to go lower because of the s/c intake. Whats a little more $$$.... plus these were only 41 lb injectors...probably not enough for the cam and s/c...
Posted via Mobile Device

[Wasted Income]

60s are the bare minimum for that setup. Do you ever plan to run E85? If so, step up to a set of 80s.

http://www.racetronix.biz/itemdesc.a...114992&eq=&Tp=

[BR3W CITY]

FIC is Fuel Injector Connection, and I've dealt with them before when finding flowed injectors for imports used to be hard.

Example, here are some Siemens 60lb's for 399.99
http://fuelinjectorconnection.com/sh...p?productid=20

on the same page they have 72lb's for the same price. Plus they are flow matched.

Those racetronix don't look bad tho either Wasted.

[Hart_Rod]

Originally Posted by Wasted Income

60s are the bare minimum for that setup. Do you ever plan to run E85? If so, step up to a set of 80s.

http://www.racetronix.biz/itemdesc.a...114992&eq=&Tp=

I won't be running E85.... Do they not offer these in the USCAR connector? Do you think those injectors will be tall enough? Here are the specs (in metric @#%^&)...

http://www.racetronix.com/images/injectors/L107.pdf

I had to move the FPR to the passengers side and to the rear. So I'll be running both supply lines up the front. That actually works a little better with the way my lines were laid out before. Did you use a 6 AN line to connect the one side to the FPR or did you stick with 8 AN like the rear?

Originally Posted by BR3W CITY

FIC is Fuel Injector Connection, and I've dealt with them before when finding flowed injectors for imports used to be hard.

Example, here are some Siemens 60lb's for 399.99
http://fuelinjectorconnection.com/sh...p?productid=20

on the same page they have 72lb's for the same price. Plus they are flow matched.

Those racetronix don't look bad tho either Wasted.

Thanks for the info!

[Hart_Rod]

Any thoughts on the injectors?
Posted via Mobile Device

[BR3W CITY]

60's min, 72-80 will give you room, 120's if we put it on corn juice and spray it

[Hart_Rod]

Originally Posted by BR3W CITY

60's min, 72-80 will give you room, 120's if we put it on corn juice and spray it

I'm thinking about going with these, so please chime in if you think I'm making a mistake, .

http://fuelinjectorconnection.com/sh...?productid=522

[BR3W CITY]

Look good to me. The Siemens injectors are totally proven across platforms, and if they are willing to include the correct wiring connectors for the same price thats even better.