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View Full Version : K04 setup.. 310cc or 380cc



cordaroa4
02-08-2008, 02:57 PM
Okay, here's the thing.. Imma about to be getting a k04 turbo real soon. From seeing some other people with the k04 turbo, i saw some people use 310cc injectors and others use 380cc injectors... Which ones are the more appropriate??
Whats the different outcome between the two? Of course more fuel but what about horsepower gains?

To add i will have a adjustable FPR

grip_racer
02-08-2008, 03:01 PM
depends on your year

--depends most on what your ECU programmer has specified--

more fuel (without more air and programming) does not equal more power.

cordaroa4
02-08-2008, 03:03 PM
Well i was going with the PC-16 file.. and my car is a 1.8t year: 99.5

Burntaudi
02-08-2008, 03:04 PM
It's the 310cc-315cc ones that you want.

cordaroa4
02-08-2008, 03:06 PM
Thanks guys.. Just curious, why am i seeing few people with the PC-16 file running 380cc injectors tho?

Burntaudi
02-08-2008, 03:19 PM
Thanks guys.. Just curious, why am i seeing few people with the PC-16 file running 380cc injectors tho?

Thats the wrong size for that file. You can make them work if you back off the pressure...which will make drive ability suffer. Or it will burn real rich.

Papachristou
02-08-2008, 03:30 PM
380-386cc are used on b6 k04 files... 380cc seem to have cold start and idling issues for us... shows the importance of using the correct injector for your file

mike-2ptzero
02-08-2008, 03:58 PM
The only B5 that uses the 380cc injectors with a K04 would be the 2001 and that is for the GIAC FX Hammer file. The J31 file uses stock injectors with a 5 bar or can use a set of 310cc injectors or the 180hp Audi TT injectors which are 317cc with a 4 bar fpr or adjustable at 3.6-3.8 bar.

grip_racer
02-08-2008, 04:21 PM
is there a HP rating difference between the PC-16, J31 and Hammer?

AudiRacerS4
02-08-2008, 04:39 PM
is there a HP rating difference between the PC-16, J31 and Hammer?

J31>PC16>Hammer

a4rings
02-08-2008, 05:40 PM
The only B5 that uses the 380cc injectors with a K04 would be the 2001 and that is for the GIAC FX Hammer file. The J31 file uses stock injectors with a 5 bar or can use a set of 310cc injectors or the 180hp Audi TT injectors which are 317cc with a 4 bar fpr or adjustable at 3.6-3.8 bar.

you can really run j31 with stock injectors?

cordaroa4
02-08-2008, 07:04 PM
Oohhhhhhh Ok!!!

mike-2ptzero
02-08-2008, 08:05 PM
you can really run j31 with stock injectors?

Yes with the 5 bar fpr. The 2000 had larger injectors then the ndbw cars. But the problem is that our fuel pumps dont really like running on a 5 bar when pushing such high boost like the J31 runs.

a4rings
02-09-2008, 01:51 PM
Yes with the 5 bar fpr. The 2000 had larger injectors then the ndbw cars. But the problem is that our fuel pumps dont really like running on a 5 bar when pushing such high boost like the J31 runs.

would you reccomend getting the 310cc injectors with a 4 bar fpr?

mike-2ptzero
02-09-2008, 02:04 PM
would you reccomend getting the 310cc injectors with a 4 bar fpr?

Yes or going with the 180hp audi TT injectors which are 317cc. Both can run on a 4 bar fpr or going with an adjustable. Doing it this way makes the J31 run much better because it puts less stress on the fuel pump and lets it flow more fuel at the lower fuel pressure.


I just saw a FS thread on Vortex for the J31 file, adjustable fpr and the 317cc injectors. here
(http://forums.vwvortex.com/zerothread?id=3659057)

BLUEisFASTER
02-11-2008, 10:41 AM
i had a ko4 installed aster blowing my ko3 sport last summer. i didnt nothing else!! i have a dahlback chip and the car feels great. this spring will be timing, hoses, mounts, etc.

should i do the injectors as well, is this necessary bc i have the ko4??

Nebone
02-11-2008, 04:01 PM
i had a ko4 installed aster blowing my ko3 sport last summer. i didnt nothing else!! i have a dahlback chip and the car feels great. this spring will be timing, hoses, mounts, etc.

should i do the injectors as well, is this necessary bc i have the ko4??

Most likely now worth the money to perform that upgrade. You will gain like 20hp