GT28rs - Dyno Results

[kevin11]

I completed my GT28rs turbo upgrade and after a week of tuning and swapping up to 55lb injectors on dyno day I got the following results:

Mods include:

gt28rs turbo and all the fittings
BMC intake
VR6 maf housing
3" custom exhaust
3" downpipe
55lb injectors
front mount intercooler
4 bar fuel pressure regulator
forge diverter valve
revo big turbo software
... and more

Pretty happy with the following results at approx 20 psi

Note - the 440 injectors had the car running dangerously lean and I couldnt break 284 whp with them.

[bluebora20v]

nice. breaking 300 whp is sweet

[BHB]

yeah no joke

[1.8TJETTA808]

now lemme see your car man!

[kevin11]

lol... the car is still somewhat of a sleeper. My intention was to make it fast first, then make it look sweet.

It's only got 1 weeks worth of tuning done so I am hoping to see even better numbers over the next few months.

350whp would be nice, but probably unrealistic... but ya never know!

PS - Should give PG Performance a big hand for working their assess off getting this together and Shawn at Kinetic Motorsports for tuning this thing so well in a short time.

Modified by kevin11 at 3:06 AM 7-25-2005


Modified by kevin11 at 3:08 AM 7-25-2005

[2002_Turbo]

remind me what your car looks like again?

[CapeGLS]

Not bad.... I am taking it you have the .86 trim!
Can't wait to get mine on the rollers (but gotta work out all of the kinks)

[EPWolfy18T]

Nice numbers, although I'm a little confused as to where it's all coming from. Maybe I'm showing my ignorance here, but if you have REVO stage 2 on a K03s and you're pushing 20psi, you don't get anywhere near that horsepower. I know its a bigger turbo and whatnot, but do the injectors and such give you that much extra hp at a similar level of boost?

[GTI_2.0T]

Quote, originally posted by EPWolfy18T »

I know its a bigger turbo and whatnot, but do the injectors and such give you that much extra hp at a similar level of boost?

The same boost pressure does equal the same amount of air flow with a larger turbo. A GT28rs can move a much, much larger volume of air at a given pressure than a K03. The larger injectors are needed to provide enough fuel to match this larger volume.

[tim18t@teambagtag]

first off there is no way you need that much injector unless the software is plain terrible.

second whats with the killer lag? do you have a huge exhaust leak?

[Buttero J-Lo]

Quote, originally posted by tim18t@teambagtag »

first off there is no way you need that much injector unless the software is plain terrible. second whats with the killer lag? do you have a huge exhaust leak?

seriously, 55# injectors and a 4bar is waaaaaaaaaaaaaaaaaaaaaaaaaay too much fuel.

[V84LNCH]

i don't think this is laggy at all. 175whp at 4500rpm. thats not to bad. i didn't catch the ar side, but assuming it's an .86 ar.

i'm with tim though, 440's will get you there and way mor with a 28rs. your tune must be way off to run bigger injectors.

[tim18t@teambagtag]

i see 250 at 4500 so granted i have a smaller turbo but the spool shouldnt be that far off on his set up

[V84LNCH]

you're also not running the same crap sw he is. and your sw can make the best of 380's.

[VDUBRACER187]

nice #'s... you just need better software so the power is there through most of the rpm range

[kevin11]

Quote, originally posted by tim18t@teambagtag »

first off there is no way you need that much injector unless the software is plain terrible. second whats with the killer lag? do you have a huge exhaust leak?

I know the injector size is huge - maybe its the software. The car did near 20 pulls during the week when it was being dyno tuned, and couldnt get the lean spots out by tuning alone. The A/F looks nice now.

The lag isnt that bad at all - it could improve a little, but I think its reasonable for this turbo.

[EPWolfy18T]

Quote, originally posted by JettaGL_1.8T »

The same boost pressure does equal the same amount of air flow with a larger turbo. A GT28rs can move a much, much larger volume of air at a given pressure than a K03. The larger injectors are needed to provide enough fuel to match this larger volume.

Ah, everything makes a lot more sense now - I wasn't thinking this morning before work.

[Pifiu]

niceee

[I Crush Vag's]

no LSD or clutch??!?

[saceone]

nice numbaz

[tmoney13xx]

nice job... im with the guys about the software bein off you shouldnt need injectors that big but awsome job

[kevin11]

Stage 4 clutch - 12lb flywheel - no lsd

[Vwagen18t]

cool

i think once you get the fueling and tuning ironed out you can squeek out atleast another 10-15hp

[gdawg333]

Sweet

[kevin11]

now lemme see your car man!

Here's a 2 month old picture - it now has a 2" drop and a front mount intercooler. Like I said, its pretty much a sleeper.

[kevin11]

oops... was answering a question thats already been answered for me...


Modified by kevin11 at 12:35 AM 7-26-2005

[OneCleanJetta]

what kinda FMI do you have???

[aziatik1.8t]

[mtiede]

That is soooo sweet. Good work!

[mtiede]

what kind of gas mileage are you gettin?

[kevin11]

Quote, originally posted by mtiede »

what kind of gas mileage are you gettin?

I'm really not sure about the gas mileage yet - I havent calculated it out. Plus, I am driving the car alot harder than normal to expose any weak spots since the turbo upgrade.

After spending approx. $15k on mods in the last few months, my fuel economy is the least of my worries...

[mtiede]

Quote, originally posted by kevin11 »

I'm really not sure about the gas mileage yet - I havent calculated it out. Plus, I am driving the car alot harder than normal to expose any weak spots since the turbo upgrade. After spending approx. $15k on mods in the last few months, my fuel economy is the least of my worries...

Yeah I was just curious because I wanted to know how much of a difference the gas mileage is on a stock 1.8t vs. a big turbo 1.8t. That question has always burned in my head for comparison reasons.

Did you post this in the 1.8t forum? I am sure that there are some more people that can lend their insight to anything.


Modified by mtiede at 1:15 AM 7-26-2005