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AutoAlchemy Fuel inlet upgrade kit

5.5K views 39 replies 18 participants last post by  doug  
#1 ·
I've recently started the process of upgrading my fuel system to support the kind of horsepower I want to eventually have on my car. One of the upgrades has been the AutoAlchemy Fuel inlet upgrade kit.

This kit replaces the stock fuel filter to the fuel rail with a high flow Earl's fuel filter, -6 AN SS line, and a new fuel rail inlet to accept the -6 AN line.

Installation: Getting the stock filter off was a PITA. The top banjo bolt came off after soaking in Liquid Wrench overnight, but the lower fitting refused to come off. I spent a good 2 hours trying to get the fitting off and finally got my dad to take a look at it. By putting the two wrenches on and using a huge set of pliers to squeeze the wrenches together the fitting finally broke loose. Installing the AutoAlchemy kit was a breeze, very straightforward and fit perfectly.

Performance: I have recently gotten a ACT 2600 and Fidanza flywheel installed, so I am still breaking it in. But just from this mod I have seen a huge decrease in EGT temps. On the highway, I went from a cuising temp of 1450 to a cruising temp of 1350. Once I get my clutch broken in, I will do some datalogging runs to see how this mod has affected my S-AFC settings (which I believe are too rich now).

Overall I am very happy with this mod and would recommend it to anyone that is unhappy with their stock fuel filter and wants to have something that is capable of alot more horsepower.
Quality: 10/10
Ease of installation: 10/10
Ease of getting stock fuel filter off: 3/10 What a PITA!

Links:
AutoAlchemy
Pics of the installation
 
#4 ·
Heat said:
I wish I could get my fuel filter off so I can put mine on :(
Believe me I know how you feel. I once started to change my fuel filter like a couple months ago and gave up after 4+ hours of trying to get the lower fitting off. Just takes ALOT of liquid wrench and the right tools.
 
#7 ·
Dude he said it in the very first post.

I like the looks of the kit, and for the price it isnt bad at all. Alot of people have claimed "you can do it for cheaper by yourself" but really the price difference isnt all that much and the piece is already made for you.
 
#8 ·
At what point does the restrictive stock stuff become an issue?

That sounds nice, I might get that when I need it (probably still a ways off).
 
#10 ·
ALLTRBO said:
At what point does the restrictive stock stuff become an issue?
I believe somewhere near ~400+ hp or something like that. I really couldn't tell you the exact number. It's always nice to get rid of some restrictions and also makes it alot easier to get your fuel filter off.

16g-95GSX said:
I like the looks of the kit, and for the price it isnt bad at all. Alot of people have claimed "you can do it for cheaper by yourself" but really the price difference isnt all that much and the piece is already made for you.
Definitely, I opened the box and put it on my car. No problems with getting anything to fit. I think the price is good also.
 
#12 ·
The stock fuel filter cost me 27 dollars alone from mitsu, something to think about since this entire kit runs you 160 bucks if I'm not mistaken, and thats for everything, so 125 bucks more, perhaps one of the cheaper mods youll find, although I'd like to see some serious figures backing it up. Theres always band-aids around having larger lines, but upgrading them I can imagine would be a nice alternative.
 
#13 ·
16g-95GSX said:
although I'd like to see some serious figures backing it up. Theres always band-aids around having larger lines, but upgrading them I can imagine would be a nice alternative.
Just looking at the stock banjo bolt can give you a good idea on how much of a restriction you are taking out.

I am keeping the stock fuel lines for now, but I will probably be doing a Stevetek fuel upgrade sometime and upgrading the stock line to -6 AN SS line from the fuel pump to the new fuel filter.

But I don't see that being necessary unless I am making over 500whp, which I'd like to have eventually :D
 
#15 ·
trbotsi said:
FWIW, stock lines, (banjo bolt and all) have gone 11's, maybe 10's with no modification and have supported well over 500whp. The parts to make the kit come out to about $120 or so....
I've always heard lower hp ratings for the stock fuel system, but if that's true then that's awesome. I'm just going for the "better safe than sorry" approach with my fuel system.

Reading alittle from the SteveTek website is enough to make me want to upgrade some things in the fuel system.

I spent 30 extra dollars by going with AutoAlchemy (total was $150 without a gauge port) and I probably saved a few hours by having everything setup and ready to go, so I'm definitely satisfied with this purchase.
 
#17 ·
Bigfoot said:
How does the fuel rail accept the -6an line? How did that part of the modification go? I've heard reservations about the Steve Tek method of using JB Weld on gasoline fittings.
AutoAlchemy has that covered. Take a look at this link.

This kit is truly bolt-on. The link I provided in my first post has all the info you need.
 
#18 ·
If you want to make your own fittings don't use JB weld. Use epoxy designed for rc planes. It's designed to resist oil and fuels better, and be sure to sand down as much of the surface as you can with a rough grain sandpaper (obiously not the threads) so there is more surface area for the epoxy to stick to.
 
#19 ·
if someone is making their own fuel rail adapters, they should be welded on, end of story.

i chose to make my own kit a while ago because i wanted a better filter tha they offer. if i remeber correctly they use like a 10 dollar filter. i did use their an adapters, and i was very impressed with them. i used aeroquip fittings/line, and an aeromotive filter. i put the filter parallel to the ground right under the upper pipe. now its right there when i need to change the element. i think i spent about 200 for the line, fittings, and filter for the feed and return.

for the bottom fitting on the stock filter i just used 2 wrenches and made them so they were close together, then i just sqeezed them towards each other with both hands. it came right off the first time, the second time was much easier. i had a harder time with the upper fitting the first time.
 
#20 ·
trbotsi said:
FWIW, stock lines, (banjo bolt and all) have gone 11's, maybe 10's with no modification and have supported well over 500whp. The parts to make the kit come out to about $120 or so....
I agree. I just put a brand new oem filter back on mine, although I think it would be something worth doing for the price, plus you get a little bling under the hood.
 
#21 ·
I got my AFPR, Supra pump, and the fuel rail adapter ordered. And I found a place that sells all the -6AN fittings.

i chose to make my own kit a while ago because i wanted a better filter tha they offer.
What's a good filter to use? I want it to flow better than the stocker, have good quality, and not be too spendy.
 
#24 ·
Generation X said:
IMO the oem mitsu filter is the best.
As far as stock-replacement filters, yes. For an aftermarket fuel system, definitely not.

While it's true cars have gone plenty fast with stock lines and filter, they have done so tuning to protect #1 and #2. You can do it that way, or you can tweak the fuel system a bit to help even out fuel distribution. Your call.

As far as filters go... I'll be using a K&N 8AN filter on mine. But I don't believe K&N is making fuel filters anymore, so you can't call up Summit and order one. You shouldn't have any problems with the Earl's filter, but the next option up from there is the Aeromotive filter, which is megabucks. The K&N filters were nice in that they were right down the middle in price and performance. Oh well.
 
#26 ·
James92TSi said:
As far as stock-replacement filters, yes. For an aftermarket fuel system, definitely not.

While it's true cars have gone plenty fast with stock lines and filter, they have done so tuning to protect #1 and #2. You can do it that way, or you can tweak the fuel system a bit to help even out fuel distribution. Your call.

As far as filters go... I'll be using a K&N 8AN filter on mine. But I don't believe K&N is making fuel filters anymore, so you can't call up Summit and order one. You shouldn't have any problems with the Earl's filter, but the next option up from there is the Aeromotive filter, which is megabucks. The K&N filters were nice in that they were right down the middle in price and performance. Oh well.
I agree! If I was pushing anything close to 450 whp I wouldn't use the oem filter either, with an aftermarket fuel system, but then again 3/4 of the people on these boards will never need to upgrade to an aftermarket fuel system to begin with, because more than likely they won't be making 450whp. That's well over 500 hp at the crank, and more than likely the car will not be streetable either. I didn't know the fella was trying to make 450 whp. Hell... that's a whole different ball game.