TT injectors w/ a K04?

[RedRocket]

Hey, how do the TT 225 HP injectors go with the K04 kit. Is it worth buying? Are they a possible upgrade? Is there a software upgrade to go with the bigger injectors and 5 Bar FPR available by Giac/AWE?

[DDQ]

If you use the 5bar FPR, then I don't see why you'd need the larger injectors. With most kits, it's either:

1) Stock FPR + larger injectors, or

2) 5 bar FPR + stock injectors.

I guess it all depends on what software you plan to run.

[RedRocket]

Originally posted by DDQ
If you use the 5bar FPR, then I don't see why you'd need the larger injectors. With most kits, it's either:

1) Stock FPR + larger injectors, or

2) 5 bar FPR + stock injectors.

I guess it all depends on what software you plan to run.

humm, that's cool. Guess I don't need to spend more money then. I guess the FMIC is my next power mod. I've wanted a K04 so bad for so long that I don't know what to do now.

[Burntaudi]

Originally posted by DDQ
If you use the 5bar FPR, then I don't see why you'd need the larger injectors. With most kits, it's either:

1) Stock FPR + larger injectors, or

2) 5 bar FPR + stock injectors.

I guess it all depends on what software you plan to run.

Umm your right about #2...but #1 is 3 bar FPR + larger injectors (stock FPR is 4 bar)

[Devious27t]

Originally posted by Burntaudi
Umm your right about #2...but #1 is 3 bar FPR + larger injectors (stock FPR is 4 bar)

@4 bar the TT injectors are at 390cc's approx. APR uses these injectors with their stg 3 iirc @4bar.

[pdxa4]

For the basic K04 setup, you only need the 5Bar FPR...naturally with the K04 software...

[marcini]

I thought that the TT injectors were 310cc's, if anyone needs I got the 5bar fpr for sale, brand new. My car is 2000 so im using giac with j31 file, 3.7bar fpr and 310cc injectors form tt

[excursion]

Is the stock FPR really 4bar?

[bhvrdr]

Originally posted by marcini
I thought that the TT injectors were 310cc's, if anyone needs I got the 5bar fpr for sale, brand new. My car is 2000 so im using giac with j31 file, 3.7bar fpr and 310cc injectors form tt

TT 225 injectors are approximately 360cc at 3bar.

[RedRocket]

Originally posted by excursion
Is the stock FPR really 4bar?

ya man, it's true. I can take pics of you like.

[excursion]

You learn something every day, I thought it was 3

[Devious27t]

Originally posted by bhvrdr
TT 225 injectors are approximately 360cc at 3bar.

do you have a FP gauge on your car because everyone else i have talked to says they are 310@ 3 and 390@4 which makes sense to me in regards to the duty cycle of the injector, ie the higher the FPR the higher the duty cycle will be at 0 vacuum

[bhvrdr]

Originally posted by DVS18t
do you have a FP gauge on your car because everyone else i have talked to says they are 310@ 3 and 390@4 which makes sense to me in regards to the duty cycle of the injector, ie the higher the FPR the higher the duty cycle will be at 0 vacuum

Heres a couple links. The pressure will vary by 20 or so cc's but you get the idea...

http://clam.rutgers.edu/~dreadsct/re..._injectors.htm

http://search.audiworld.com/index.mh...&de=08/12/2004

[awe4rings]

I believe earlier model a4s came with 3bars and the later models of the b5 were equipped with 4bar fprs...any one??

[marcini]

Originally posted by awe4rings
I believe earlier model a4s came with 3bars and the later models of the b5 were equipped with 4bar fprs...any one??

true that

[skene]

Originally posted by DDQ
If you use the 5bar FPR, then I don't see why you'd need the larger injectors. With most kits, it's either:

I can tell you why you would want to run larger injectors over a .5bar FPR. For the simple fact of high Exhaust Gas Temperatures. High EGTs are a main cause of turbo failures.

Don't believe everything you read.

[Devious27t]

Originally posted by skene
I can tell you why you would want to run larger injectors over a .5bar FPR. For the simple fact of high Exhaust Gas Temperatures. High EGTs are a main cause of turbo failures.

Don't believe everything you read.

another little addition to that. raising fuel pressure affects the duty cycle of an injector causing it to lean out quickly. this can cause "hot spots" which goes back to what skene said are high EGT's. who was the guy on AW with the yellow a4 who was using a stock FPR who has gone through 2 (maybe more) k04's and was freaking out about it? was in the performance forum

[DDQ]

Originally posted by skene
I can tell you why you would want to run larger injectors over a .5bar FPR. For the simple fact of high Exhaust Gas Temperatures. High EGTs are a main cause of turbo failures.

Don't believe everything you read.

That's great. But I didn't ask which is better, I'm aware larger injectors are the superior route.

My comment was just responding to what he posted, where he was asking about running larger injectors AND a 5 bar FPR together.

[mike-2ptzero]

Originally posted by RedRocket
Hey, how do the TT 225 HP injectors go with the K04 kit. Is it worth buying? Are they a possible upgrade? Is there a software upgrade to go with the bigger injectors and 5 Bar FPR available by Giac/AWE?

Do you plan on making more then 250 hp and 300 tq? Because thats what I made on stock 270cc injectors and a 4 bar fpr with my K03 on 104 octane and 20psi. I was even able to run 26psi on 91 octane on the same setup and never had an issue. Going to 380cc injectors is just over kill and there is no reason to do so in anyway.

[bhvrdr]

^^^^^^^^^^^^^^^^^^^
If I were going to ask some one what to run it would be audi2ptzero. He has d1cked around with it all.

[RedRocket]

Originally posted by mike-2ptzero
Do you plan on making more then 250 hp and 300 tq? Because thats what I made on stock 270cc injectors and a 4 bar fpr with my K03 on 104 octane and 20psi. I was even able to run 26psi on 91 octane on the same setup and never had an issue. Going to 380cc injectors is just over kill and there is no reason to do so in anyway.

What else did you modify with the 26psi/91 octane setup? What software did you use to run that, and was your car still drivable in that configuration? I'm curious because my AWE kit is rated at 235hp 265 tq with a 5 bar FPR, stock injectors and a K04.

Tell a little more about your setup, MBC i'm sure.