Isn’t a Rs4 pump a direct fit too
RS4 pump and stock A4 pump are one and the same, only the controller is different.
That’s what I used to think, but I stopped by bluewater(shop that tuned Seal66’s k04) the other day and they were saying that the rs4 pump actually flows a bit more than the a4 pump, that they are different…I haven’t looked into it, so he might be right, but I seem to ermember they were the same pump
They have the same part number…
thats what I remember. But I wouldn’t be surprised if there was a revision. The rs4 controller had a revision so they might have updated hte pump.
I would really be interested. The rs4 pump can hold up and push the car well into the 11s can this do the same on the A4. I don’t see rs4 pump failures
Don’t you need more fuel with a boosted car though?
a rs4 running 11s will have a supercharger. I think jhm stage 2 is where they start addressing fueling, dunno cuz its not out yet but they have run a 10.70 so theres gotta be at least new injectors and likely fuel pump.
isn’t there any companys like walbro making high flow pumps for audis?
I don’t think so.
it should be roughly the same amount of fuel to make the same amount of HP right?
after all you’ve got X amount of air coming in to make 700hp, so you need x/14.7 amount of fuel to make that 700hp, whether it be turbo, na, or supercharged, it needs a certain amount of air and fuel to make it happen.
that’s my logic anyway.
Yes walbro makes a pump. The thing is no one in the b7 likes to go walbro or etc because it cuts out the suction jet pump. The suction jet pump is how you get fuel from one side of the tank to the other side (saddlebag tank) so you end up haivng only a half useful tank if you do a walbro.
OEM FTW!
Don’t think so. Stock injectors on stage 2. Stock fuel pumps on the first version of stage 2 as well. When they went 11.1@125
I am pretty sure they decided to make a fuel pump upgrade, but it’s surprisingly simple . I don’t think it’s the $1000 double hpfp replacements the other kits do.
that’s incredibly awesome then. and if that’s the case the a4 guys should be mint with that pump as well.
Would be with regular fuel! I want to do an e85 tune, and from what I’ve read people struggle with the oem pump, they go to a ttrs pump and even have to drill the check valve to keep flow high enough.
A guy over on Audizine came up with a great idea. He puts a switch, just a solenoid between the suctio jet pump feed line and the main pump. When sufficient load is applied, or he might be doing it maf/map based, the solenoid closes and all of the fuel that is wasted to operate the suction jet pump flows into the engine, so at high load the solenoid closes, it fuels the extra pressure, when he let’s off the gas, the solenoid opens again and fuel goes over to the suction jet pump and you have use of both sides of the tank again.
that’s genious!
God damn it, well the guy who was supposed to ship me a tranny just bailed.
We made a deal 2 weeks ago, he agreed to package it and I would send him money. 2 weeks go by I message him and he says he threw it up for sale again because he doesn’t want to ship, then he says let me see if I get some hits on craigslist and I’ll let you know by sunday. Today he messages me, he got no hits and he is backing out of the deal…
There is no greater insult that to waste someone’s time.
Well since my fuel pump is already bad I decided to try drilling out the fuel pump check valve to see if I could get some extended life out of the pump.
https://farm8.staticflickr.com/7464/15765318341_b55a6831eb_o.jpg
So I drilled out this little Y piece in the hole.
Not really sure how far to go, but eventually it caught the spring and pulled it out.
https://farm6.staticflickr.com/5607/15147227474_88002145bc_o.jpg
cleaned it up with a reamer bit.
Then threw it into some gas and hooked it up to 12v to flush out any debris that may be in there.
https://farm8.staticflickr.com/7580/15581346159_2a5b12071f_o.jpg
Well first test was a dud, fuel pressure still dropped to 2.2 bar, but there was a catch, idle pressure was now at 5.5, where the engine wanted 3 bar at idle, so I got some advice from a friend and we decided t o cut low RPM duty cycle on the pump, we dropped 10% from the entire fuel pump duty cycle map and idle pressure dropped to 4.8 bar, and redline pressure rose to 2.7 bar…this was good news.
So knowing that the duty cycle was probably overwhelming the ecu at idle, it must have been cutting duty cycle at redline due to the fuel trims, so now that we know this can be fixed, we can lower the duty cycle down low and increase the duty cycle up high, that should correct the fuel trims, and let the car have good idle and fuel sufficient to keep the car running.
TTRS pump arrives today too, but I will probably hold off on installing it until I can work out the kinks in this pump. Since I will be drilling the TTRS pump as well, it will be important to have the routine figured out before working on a new pump.
When you open the flow the pressure should drop up top and pick up down low. Remember flowing 5 down low isn’t that hard keeping pressure up top even if you opened up the flow is where it will struggle. Make sure increasing the duty cycle doesn’t burn up your controller or the pump.
yeah that was one of the things I was worried about, the controller is pushing 70% DC at redline, which is pretty good, I don’t think I will push it more than that, but I will definitely bring down pressure down low to see if I can get it to idle and drive part throttle properly.
this rs4 controller is awesome, even on a busted pump its only 70%, the stock controller would peg to 99% at 4000 before all the fuel mods, so with the ttrs pump that flows even more I should be able to run the controller on a lower DC maybe 60%? I just missed the fedex guy, but he left me a note saying he would try to stop by later today, nice guy!
Got the TTRS pump today, its surprisingly very different…
Here is a side by side (notmypic)
http://i382.photobucket.com/albums/oo269/apatchin/photo1_zps60d49a68.jpg
So first off, the top has 5 wires going to it, where as the a4 only uses 4 wires(2 for pump,2 for level sender), this TTRS pump seems to have 3 wires for the level sender…not entirely sure what thats about.
Height is different between them, TTRS is much less tall, Also the connectors for fuel supply and return on the top are in a different location than the stock a4 pump which means the lines will kink if pushed over.
Based off that, I can’t use the TTRS yellow cap without redoing the fuel lines. This means I’ll have to recycle my green top and mate it to the TTRS fuel pump and basket. Another issue is that the level sensor arm is different, I could probably just bend it to be the same shape as the a4 one…but if height is different then it will still read incorrectly. The line to the suction jet pump appears to be the same size and fitting, the same can be said for hte primary fuel delivery line, So the pump and hoses are good to be hooked up to the green top and to the suction jet pump…
Basically the basket and the pump top might not be more hassle to fit, So I am thinking about just pulling out the TTRS pump from the basket, and fitting it into my a4 basket and top. I think this will be the easiest solution.
Another alternative would be to high speed dremmel hone the other hole in the TTRS pump basket to make room for leg from the green top. For some reason the TTRS yellow top legs are spaced out evenly, and the green top legs are put closer together. But it does appear that the TTRS pump has the same hole to mount the Green top lid. I would bet the OE manufacturer uses the same basket and just switches up the basket lid, the pump, cap and sender. Will have more pics tomorrow.
Those are some substantial differences. I would attempt to just replace the top portion. It might not be a bad idea to get a junk yard pump and practice removal on that first.