Need help with next mod!!!

[schnell]

Ok, I'm debating between the APR HPFP or a new Intercooler! What do you recommend and why?

Thanks,

Matt

[Ed Gein]

id say fmic

[B72.0T]

Umm I'd say HPFP. Because if you have fuel cuts that will get rid of them, and plus, you can go Stage2+ with the pump.

FMIC is nice too, especially since summer is coming up and the hot weather, but when it's cooler as long as you dont rip on it 24/7 the stock will work.

[Der Konig]

Do you have issues with heat soak? If not then you are wasting your money right now on a fmic unless you do track days or some sort of road racing where heat can be an issue. With the hpfp you can bump your tune up and get more usable power.

Sent from class with tapatalk

[seal66]

Johns hpfp stage1 is plenty for anyone not running a big turbo. It well help a lot with tuning. Then if you get heat soak try a fmic.

[Charles.waite]

Neither. Get an upgraded HPFP from HPFPupgrades.com NOT APR.

The FMIC is worthless unless you're constantly heating on your car or tracking it.

Having said that, you'll see no gain from a HPFP upgrade unless you get a tune that takes advantage of the added fuel pressure.

You need to explain what you are trying to achieve otherwise you're throwing money away and our advice is worthless.

Edit: Since you're already on the APR train, it might make sense to get the HPFP from them, but John's pump is a better product.

[schnell]

Thanks for the replies - I'm looking for more power overall. That's why I'm between the intercooler and the HPFP. I've been in contact with Apr, they told me the HPFP will give me way more power in the higher rpm range and a greater overall power band then any intercooler.

[Charles.waite]

^^ Only if you have a tune that takes advantage of it. Just bolting on a new pump won't do anything unless you were already fuel starved to begin with.

Honestly you're better off getting a PRV from John than getting a new pump. And spending your money on something with better gains out of the box. Not sure what that would be though as you're about at the end of "bolt-on mod" territory if your sig is correct.

[fordyoz]

Thanks for the replies - I'm looking for more power overall. That's why I'm between the intercooler and the HPFP. I've been in contact with Apr, they told me the HPFP will give me way more power in the higher rpm range and a greater overall power band then any intercooler.

honestly, its not that noticeable. ask me how i know

[schnell]

honestly, its not that noticeable. ask me how i know

Really? I have noticed at highway speeds when I floor it to pass someone it takes a second. It's like you can almost hear the fuel coming in?

[ignus99]

Because it hasn't been said yet..... w/m.

[Charles.waite]

Really? I have noticed at highway speeds when I floor it to pass someone it takes a second. It's like you can almost hear the fuel coming in?

Tip or Manual? Its probably just the turbo spooling. Thats pretty normal with little turbo 4-bangers like ours. Fuel cuts that I'm talking about are at high RPMs or usually happen right around max boost pressure in the 3-4500rpm range. The car will be accelerating then just hit a wall for a second, pull for a second then hit a wall again.

[ABreeden]

Neither. Get an upgraded HPFP from HPFPupgrades.com NOT APR.

This. Why buy the whole unit when you can upgrade the internals yourself?

[schnell]

Tip or Manual? Its probably just the turbo spooling. Thats pretty normal with little turbo 4-bangers like ours. Fuel cuts that I'm talking about are at high RPMs or usually happen right around max boost pressure in the 3-4500rpm range. The car will be accelerating then just hit a wall for a second, pull for a second then hit a wall again.

It's a Tip! So, this is normal? I never seemed to have it before I upgraded to stage 2 though? Hmm. Interesting! Is there anything I can do, besides go bigger engine?

[fordyoz]

Really? I have noticed at highway speeds when I floor it to pass someone it takes a second. It's like you can almost hear the fuel coming in?

wait, what? i thought you dont have the fuel pump yet...

[schnell]

wait, what? i thought you dont have the fuel pump yet...

I don't, but I can still hear the fuel coming through my current one.

[fordyoz]

i dont know what youre really talking about.

so Ill just reiterate: upgrading your HPFP and going Stage 2+ with APR does not give you very noticeable gains.

[bman005]

If you are going to upgrade the HPFP you need to upgrade you Pressure Relief Valve for the fuel rail aswell. http://www.audizine.com/forum/showthread.php/455536-Fuel-Rail-Pressure-Limiting-Valve This thread should answer any questions you might have about it

[Charles.waite]

It's a Tip! So, this is normal? I never seemed to have it before I upgraded to stage 2 though? Hmm. Interesting! Is there anything I can do, besides go bigger engine?

I think so. It could very well be fueling related, as Stage 2 is usually around the limit of the stock PRV. I would look into getting a 142bar prv from HPFPUpgrade.com (John) and slap her in. If you have a vag-com, you should log the fuel pressure and see if its maxing out and dumping pressure. I would go that route and if you still suspect fueling issues, then consider an HPFP upgrade.

Some turbo lag is normal for our cars. Tiptronic often makes it worse as it is very slow to downshift especially at highway speeds. You might just be experiencing Tiptronic lag. They're just not particularly sporty transmissions. Sometimes Driving in "S" mode firms up the shifting, but I haven't noticed much difference in my car, its a Tip as well.

[wootwoot]

Because it hasn't been said yet..... w/m.

+1

[wootwoot]

honestly, its not that noticeable. ask me how i know

First time hearing this. I've always heard that the HPFP makes big gains.

[fordyoz]

First time hearing this. I've always heard that the HPFP makes big gains.

haha. thats the first time im hearing that.

Id like to see some APR stage 2 logs compared to Stage 2+...unfortunately i didnt have my vag-com until i was stage 2+.

[Sprode]

I don't, but I can still hear the fuel coming through my current one.

Charles is right. You are not hearing the fuel, you are hearing air.

If I understand your posts correctly, if you are getting a power loss, you do need the hpfp. I got mine without any loss up top and can't say that I felt a difference at all with the hpfp.

[schnell]

Ok, if I'm understanding everything correctly I’m hearing air not fuel? So, the HPFP will help substantially up top. In addition to the HPFP I’ll need to acquire - http://hpfpupgrade.com/Products/Show/Audi/2.0T+FSI/Audi+Performance+Rail+Valve – if that’s correct, please let me know and I’ll place the order.

Thanks for all the help.

Matt

[fordyoz]

the only thing correct that you just wrote, is that you are hearing your turbo, not your fuel pump. you MIGHT need an upgraded pressure relief valve. but you wont know unless you do some fuel logs

[Charles.waite]

All the upgraded HPFP does is give you more headroom for power. I could put 3 lbs of pasta on my plate as opposed to 1.5 lbs but that doesn't mean I can eat all 3 lbs as fast as I could eat 1.5 lbs. (bad example, but i think it MIGHT illustrate the point [:d])

The fuel pressure relief valve maintains a higher max pressure in the fuel rail. Some early 2.0t engines have a 116bar FPRV (most have 125bar or something) and this causes the fuel pressure to be too low in the higher RPMS causing the fuel pressure to not be able to meet the requested pressure. Ex: the ECU is calling for 130 bar of fuel pressure but your rail can't get over 116bar because the FPRV is dumping pressure after it hits 116 bar. So IF, and only if, you are hitting a fuelling wall with a lower rated FPRV will you see any gains with an upgraded FPRV. Going along with my pasta example: If I was eating really fast and was taking large bites, if my bites got too large and all the pasta fell off the fork that is (roughly) what could happen with the lower spec PRV.

There isn't a SINGLE fueling upgrade for B7 Audi that will give you gains all by itself unless it addresses a current weakness like too little fuel pressure for your tune. Like fordyoz said, theres no way to know if you're experiencing fuel issues without seeing some logs. I'd hate to see you drop some coin on these parts and not see any noticeable gains.

If you're dead set on getting something, get an upgraded FPRV. I would go for the 145bar one.

[wootwoot]

haha. thats the first time im hearing that.


Can someone else with a HPFP that is stage 2+ comment on this? I am only stage 2 so I can't speak from experience but I wonder why if going stage 2+ provides so little benefit so many people are going that way with their cars.

[jsandor91]

im stage 2 and i've experienced fuel cuts several times at high speeds/rpms . the hpfp and or prv is added insurance for the car. the engine might only be able to get 90% of the fuel without the fuel upgrades. but with them they can perform maybe 130 % which would be a turbo upgrade to fully take advantage of the fueling. its similar to someone with a k03 (max ~ 300chp) getting a big brake kit, its not really needed for 300chp but some people like knowing the parts are more then capable of performing what is needed. with that said i will eventually get a hpfp and prv but probably not a bbk.

[fordyoz]

Can someone else with a HPFP that is stage 2+ comment on this? I am only stage 2 so I can't speak from experience but I wonder why if going stage 2+ provides so little benefit so many people are going that way with their cars.

a couple of reasons i went with an upgraded hpfp and stage 2+ was that i thought i was getting fuel cuts, and its a stepping stone to getting a turbo upgrade down the road.

[fordyoz]

If you're dead set on getting something, get an upgraded FPRV. I would go for the 145bar one.

definitely do some logging before you buy this. i bought it and ended up not even needing it.

i vote for water meth

[schnell]

a couple of reasons i went with an upgraded hpfp and stage 2+ was that i thought i was getting fuel cuts, and its a stepping stone to getting a turbo upgrade down the road.

Did the HPFP signifigantly decrease your fuel cuts?

I could get both this and water meth?

[fordyoz]

yes, and yes you can get whatever you want. $$$. if more overall power is what you're looking for, i would just save up and get a turbo upgrade if i were you.

like i said, I would only get an upgraded HPFP if i was having fuel cuts, or if it was a stepping stone to a turbo upgrade
i would only get the upgraded rail valve if my stock one wasnt handling the requested pressure

[hpfpupgrade]

Not much needed to be said by me in this thread... thanks guys.

We do have S1, S2 fuel pumps ready to ship out and PRV's on the shelf.

-John