2003 Golf GTI 1.8T (modifiying it) [Archive] - GrandAmGT.com Forum


View Full Version : 2003 Golf GTI 1.8T (modifiying it)

Mike Jung
08-09-2003, 08:58 PM
A guy at work leased a 2003 VW Golf GTI 1.8T (in manual stick shift) earlier this year.

A few days ago he took it for a couple of dyno runs.
190hp @ wheels (estimated [based on assuming losing about 15% though the drivetrain] @ 225hp @ crank)
225lbs-ft of torque @ wheels (estimated @ 265 lbs-ft of torque @ crank)
:wow: , got to love people who don't just talk smack about there car but get it dyno'ed for actual #'s :thumbs:

He just bought a (I think) a Revo... something hand-held PCM/ECM reprogrammer.
Using Sunoco Ultra 94 octane (up to 10% blended ethanol gasoline).
Set the boost level to 20psi (is that even safe ? - I don't know much about turbo'd engines) on his turbo.
Can a stock engine take that kind of boost level for long (with out prematurely wearing out the engine) ?

He still has to put on his carbon fibre 'Cold Air Intake' & diverter valve for his turbo (instead of a blow-off valve) [what does that do exactly :confused: )

So I said to the guy, "I guess you are going to buy out the lease, now that the modifying bug has started ?".
He says, "No, I'm just going to return it stock & get another one or something else afterwards. & i am not going to do anymore modifying of it."
Yeah, right me :rolleyes: & then he goes, 'I still am thinking about getting a better down pipe & high-flo cat' lol

I thought I share a story of what he says "is a simple mod" of buying a PCM/ECM reprogrammer for his GTI.
Kind of makes you think of the after-market support out there for other cars.

08-10-2003, 07:58 PM
those veebubbs are wickedly receptive to mods.....

08-10-2003, 09:41 PM
I just don't get why GUYS buy VW's.
Just my thought.

08-11-2003, 06:53 AM
mainly because that VW would whip our asses. :)

08-11-2003, 06:54 AM
i dunno either but i was test driving one when my wife was thinking of buying one... i will tell ya, it is a fun little car to throw around!

08-11-2003, 10:18 AM
Originally posted by 1993Grandamgt
those veebubbs are wickedly receptive to mods.....

They are good for intake, exhuast and chip. Past that there bottom end is not very strong and mods will come more expensive.

08-11-2003, 03:02 PM
true but every mod that you do after that are powerfull. by the way i was not limiting my post to justthe 1.8t. i was also including the 2.0 4 cyl. and the VR6

08-12-2003, 04:27 AM
Originally posted by Kdawg207
mainly because that VW would whip our asses. :)

VWs are nothing special I owned a passat the build quality was horrible thing was in the shop all the time...if you want a realiable car dont buy a VW. And actually the VR6 is the better engine to "build up"

08-12-2003, 06:49 AM
i said that VW
trust me i know more about VW's than just driving a passat
that turbo GTI would whip yur ass, my ass, and most of us GA's

08-12-2003, 07:14 AM
Which is faster the VR6 or the 1.8T ??

08-12-2003, 07:33 AM
stock...the 1.8
if the 1.8 is a stick it's even faster...less turbo lag

but eh vr6 can be modded more hence giving it more potential for speed

so depends if you wanna mod or not

08-12-2003, 07:34 AM
i think the 1.8ts are supposed to be better for modding..

08-14-2003, 04:52 AM
The VR6s are better for modding and have the potential to be faster. Not saying the 1.8 isnt fast but VWs in general arent anywhere near the most realiable cars on the road. Not so fast if its in the shop all the time.

08-14-2003, 05:06 AM
The size of the 1.8L turbos are smaller than you can EVER imagine.

There is a dumb arse down here with one and a RFL BOV, he can blow it off just at idle.. It must spool at 1k i swear.

20psi must NOT be safe for that car on its stock fuel system

Just let him smack talk some more and blow that turbo. Its certainly not going to cause much engine damage considering its quarter sized comp. wheel and SUPER low cfm.

08-15-2003, 12:08 AM
VWs are overpriced and the Jettas are particularly prone to electronic failures. That is really gay if you ask me. So is building a turbo engine with a weak bottom end.

08-15-2003, 12:49 AM
check out www.vwvortex.com

the forums there are really helpful. my friend has a 97' Jetta VR6 and he loves it. here is a pic of his car in the last Hooters Car Show we had


08-15-2003, 01:51 AM
God those years were butt ugly for that car. But I like how the got in the biggest engine possible for the car with the VR6. I also like how it's like a V6 in space saving and an Inline 6 with valve design. Very clever engine design, IMO. Torquey and tunable too. Still a VW tho.

Mike Jung
08-30-2003, 08:23 PM
clearing out old email & came across his dyno:

from: http://www.pbase.com/image/19939414

Mike Jung
09-06-2003, 04:51 PM
The guy that owns the GTI told me today:
That he took it up to 260km/h [161.5mph] in 5th gear over-drive with the rpm's near the redline.
He was late this morning for work & took the 404/DVP highway from Markham to downtown Toronto (which is a little down hill)
It outside was 15C [59F] & 66% humidity if that makes a difference.

With what his dyno shows; would that even be possible.

:wow: & stupid for him to be going that fast in light highway traffic.

09-08-2003, 08:00 AM
Originally posted by VTECSiGAH8R
God those years were butt ugly for that car. But I like how the got in the biggest engine possible for the car with the VR6. I also like how it's like a V6 in space saving and an Inline 6 with valve design. Very clever engine design, IMO. Torquey and tunable too. Still a VW tho.

Yeah... I read in good article about the VR6 engine. It's not really a V6 but a "staggered inline" design. http://www.grandamgt.com/forum/attachment.php?s=&postid=233848The engine only has one cylinder head. The two banks of cylinders are canted at 15* from each other which make it technically a V engine.