ahmad0658

If i will go like SLR type or TTM way and close the loop (by adding another extension of any suitable type) Is there any thing I need to make to make sure that the distribution volume of fuel is better among the injectors ?

I already have bigger injectors, but that's not enough.

GT-ER

Good question.

TTMotorsports

With a closed loop system you will get the benefit of equalized fuel pressure to all of the injectors. We are seeing a 20-25rwhp gain(with no other mods) from going with the TTM Injector and Fuel Rail Kit. You know what the TTM 82mm TB Kit did for your car Ahmad! Pre and post tune!

The issue that I see with this fuel rail is it is still building pressure from the end of each side of the rail and, when there isn't sufficient volume from the small diameter feed line, you will experience the same issue unless larger injectors are used to lower the IDC. If the injectors at #1 and #5 are close to static there is a good chance the volume will not be adequate and there will be a pressure drop back to the rear cylinders. Same scenario. JMHO

Good luck with the fuel rail Mikey. You are always up to something!

TTMotorsports

The stock fuel rail builds pressure from the ends of the rail. When the injectors at the end of the rail(#1 and #5) go static(or close to it) the pressure and volume diminish at each subsequent injector back to the feed point. An injector is a valve. All it does is open and close. When you are at the top of 3rd and into 4th the injectors go static(don't close) and, since there isn't sufficient volume or pressure, the injector still opens but there is very little pressure built up(pressure brings volume in this system) and it only injects a minimal amount of fuel causing a lean condition. In time you will see a loss of compression.

Injectors should be cleaned and flow tested every 30k. I have seen a 80cc drop in the stock injectors but return to their rated CC after 2 cleaning cycles. Definitely worth doing.

ahmad0658

Oh yeah, TTM 82mm TB was great mod. Well, If you will just lower your price for the fuel rail that would be great .

How long does it take to get it?

TTMotorsports

You are looking at 3-4 weeks. There are 8 rails ahead of you!

Benz-O-Rama

What's cheaper? TTM fuel rail or rebuilding the engine because of a popped #8?

AgSilver

It's farthermost from the two points of initial pressurization; those being the two standard closed ends of the rail.

nick 55

That's a great point. I have to agree. The TTM injectors fit well, flow more at a lower duty cycle so they aren't at their mechanical limits when under full load, high MPH conditions. The rail works to eliminate differentials from side to side and front to back.

Mikey, not questioning the workmanship, but by welding in a Y so to speak, how do you inspect inside the pipe to ensure there isn't any welding slag or cooled droplets of metal blocking the pipe to one side or the other? Essentially, you could create an even larger pressure drop in the rail if that happened. If you did a loop like Bruce's then you could at least use a flashlight to make sure you didn't have any blockages.

Nick

pearlpower

Very nice, you should market is considering what the alternative is selling for.

GT-ER

Welding these kinds of pipes don't require them to be strong, all they need to do is seal. The welding is probably done only superficial.

tbal

When should somebody be concerned about doing a fuel rail? Heavy modified (eg 180+ pulley?), or it can happen to even a slightly modded car?

Zod

Thing is who can tune for it?
and am talking every day driving not juts wot....what about people with different mods...pulley sizes and so forth

Bruce if some one runs a smaller pulley does that mean they are less likely to run at max cycle?
is the issue boost related?...i.e the more boost the higher chance you will run lean up top?

Hammer Down

from the beginning it was said that if you have more than 500rwhp then this mod is for you. so I would say anyone that is running pulley+headers & a tune may want to look at this mod and yes a stock system would benefit from this, if someone were to remain stock you could install the fuel rail with your stock injectors (Bruce correct me if I'm wrong)

TTMotorsports

Jerry of EC has over 50 hours developing the file(working closely with Shardul) for the injectors and fuel rail set up as of now.

FYI-Jeremy of OE is tuning Bramage's car all day Saturday with the TTM Injector and Fuel Rail Kit so there will be 2 options for tuning.

I know with just the injectors and fuel rail Jerry gained 25rwhp on Shardul's car as the only addition mod.

It definitely has a lot to do with the amount of boost, hence pulley size.You also have to factor in exhaust, cooling, tb size, etc but mainly it's the boost level.

After a couple of discussions with various tuners we believe that the 500rwhp makes the injectors and fuel rail set up mandatory unless you never do extensive pulls through 3rd and well into 4th which is where the damage starts to happen.

Jack you are correct in that the fuel rail will help even stock cars running stock injectors with a more balanced pressure to all of the injectors. While the fuel rail helps to diminish the fuel starvation issue the injectors that I use are the game changer because of the dual spray pattern. It is as close to direct injection that you will get with this engine.

I Like Soup

Is the rail available on the website? I can't seem to find it.

I did note that there is a claimed 15-20hp gain from cooling mods alone, can't say I've seen anyone claim that before.

TTMotorsports

The TTM Injector and Fuel Rail Kit is $1580. There are now 11 orders for the fuel rail and it usually takes 5-10 days to get the unmodified rails from Germany.

Any gains associated with cooling mods simply means that, because the cooling system is upgraded, the IAT's stay lower for a longer period of time and the ECU keeps more timing in it so there is a gain. Are you still confused? Lay the dyno graphs over each other after a cooling system upgrade and you will see the gains.

320 dreamer

bruce now tht the price is out in the open what would a setup run for the s/c 3.2 v6 m112 engine? lots of lean conditions with the srt-6/slk32 guys running the 181/185 crank pulleys in 3rd gear. might be a decent market for you on the crossfire forum if the price is within reason.

TTMotorsports

It looks like TTM is getting into the 32 market!

Thanks Steve for being the guinea pig. Your fuel rail is on order!

930chas

Bruce this is great stuff brotha! Anyone with a modded 55k motor needs this setup as insurance to their motor. As Clayton stated, which is cheaper?

TTMotorsports

It was great speaking with you last night West Coast!

It is a no-brainer but we know some 55 owners are lacking there!

Clayton always thinks everything is about him. He has very bad flatulence(Flatulence is the expulsion through the rectum of a mixture of gases that are byproducts of the digestion process of mammals and other animals.) Need I say more!