Kjet Mods

zain_c · Post by **zain_c** » Wed Oct 10, 2018 8:50 am

Hi guys,

So i'm contemplating doing small mods to my Jetta in the new year. Still runs on Kjet...has no issues, and been my daily drive since Feb when I bought it.

I'd like to add some grunt to it, nothing over the top though. But would it be worth it to mod this motor on this specific injection system?

Thinking a 276 Estas and some headwork port etc and possibly bigger valves. My concern is will these changes mess with the Kjet? I'm guessing some tuning will need to take place but I don't know anybody here in CT that is even vaguely familiar on tuning or adjusting the Kjet to accomodate the mods.

Thanks

Wolf Mk2 16V · Post by **Wolf Mk2 16V** » Wed Oct 10, 2018 9:09 am

Can I please buy your G cam?!

zain_c · Post by **zain_c** » Wed Oct 10, 2018 9:34 am

hahaha nah I'll most definitely keep it, just in case i feel the Estas is a bit too wild...yeah i know even thought it'll only be a 276

Post by **Killerwatt** » Wed Oct 10, 2018 10:07 am

Fueling side will be fine on the kjet and it will compensate for the added airflow. Cant recall if the csi had the ignition module or vacuum advance carb. But that will be more out on tuning side. Rather look at efi before you strt porting and bigger valves.

Post by **panic-mechanic** » Wed Oct 10, 2018 11:41 am

K-jet is very tolerant of mods. Even big valve and flow

zain_c · Post by **zain_c** » Wed Oct 10, 2018 11:45 am

panic-mechanic wrote: ↑Wed Oct 10, 2018 11:41 am K-jet is very tolerant of mods. Even big valve and flow

Thanks man! so no adjusting on the system will need to be done, considering my modding plans?

MIght even go 272

Post by **panic-mechanic** » Wed Oct 10, 2018 12:01 pm

It's always best to check that it's doing the fuelling right still and tomset thentiming for best power but in thenolden days we did fairly substantial mods before any adjustment was needed. Ferroli in the cape used to know them. Ask if they still remeber how

buffyza · Post by **buffyza** » Thu Oct 11, 2018 9:52 am

Wolf Mk2 16V wrote: ↑Wed Oct 10, 2018 9:09 am Can I please buy your G cam?!

Are people still buying G Cams?

Been a long while since I was in the VW game but coming back.. have a G cam in the cupboard I've been saving for a rainy day!

zain_c · Post by **zain_c** » Thu Oct 11, 2018 9:55 am

what's the big hype surrounding the Gcam? For years I've been hearing guys making a big deal about it.

zain_c · Post by **zain_c** » Thu Oct 11, 2018 9:55 am

panic-mechanic wrote: ↑Wed Oct 10, 2018 12:01 pm It's always best to check that it's doing the fuelling right still and tomset thentiming for best power but in thenolden days we did fairly substantial mods before any adjustment was needed. Ferroli in the cape used to know them. Ask if they still remeber how

Thanks Panic...will do more research. Just don't want to be in the situation where my Kjet starts giving problems. When that happens, a 9A will go in.

buffyza · Post by **buffyza** » Thu Oct 11, 2018 10:08 am

zain_c wrote: ↑Thu Oct 11, 2018 9:55 am what's the big hype surrounding the Gcam? For years I've been hearing guys making a big deal about it.

It was the "biggest" stock cam at the time and they were easily ground to a higher duration..

G cam is 252 degrees if I recall correctly.. like I say been a few years.

ICE King · Post by **ICE King** » Thu Oct 11, 2018 10:16 am

besides the fueling , What about rev limit on kjet to mention one?

I understand that Kjet will be accommodating to mods but also wont get the best out of the mods?

Post by **panic-mechanic** » Thu Oct 11, 2018 10:21 am

K-jet is a fuelling system only on mk1 and should not rpm limit.
On the mk1 the rev limiter should be in the distributor as a fly out weight on the rotor and by changing / removing that should take care of the limiter.
In all honesty - if you remove a good working correctly set K-jet for EFi and think you are going to gain HP you are in for a very rude surprise. They were extremely good at making power and doing what they did. K-jet disappeared for emissions controls - not because it was not making power.

A g-cam came out in GTI and CTI and they were an amazingly long 232 degrees. It was quite a bit nicer to a stock cam in the lower capacity engines and was an easy way to gain a few KW with no other bad side effects.
A G-cam meant for solid lifter heads could be cut to a fairly long cam for a hydraulic lifter head.

zain_c · Post by **zain_c** » Thu Oct 11, 2018 10:36 am

aaaaah all the knowledge! Thanks Panic!

I guess I'll be going through with adding those small tweaks to my mk2 then! Another reason why I'd like to carry out these additions is because I'd like to get back into doing the monthly trackdays at Killarney. Preffered way more than drags when i had my daily driver AGG Citi.

I won't be going crazy on the mods, it's still my daily after all.

buffyza · Post by **buffyza** » Thu Oct 11, 2018 10:42 am

panic-mechanic wrote: ↑Thu Oct 11, 2018 10:21 am K-jet is a fuelling system only on mk1 and should not rpm limit.
On the mk1 the rev limiter should be in the distributor as a fly out weight on the rotor and by changing / removing that should take care of the limiter.
In all honesty - if you remove a good working correctly set K-jet for EFi and think you are going to gain HP you are in for a very rude surprise. They were extremely good at making power and doing what they did. K-jet disappeared for emissions controls - not because it was not making power.

A g-cam came out in GTI and CTI and they were an amazingly long 232 degrees. It was quite a bit nicer to a stock cam in the lower capacity engines and was an easy way to gain a few KW with no other bad side effects.
A G-cam meant for solid lifter heads could be cut to a fairly long cam for a hydraulic lifter head.

Excellent post..

Sorry I used Higher instead of Longer...

Ferrari, Porsche, Audi, Certain British Sports cars all used KJet...

zain_c · Post by **zain_c** » Thu Oct 11, 2018 10:44 am

I wonder if Lynx in Paarden Eiland can tune Kjet.

ICE King · Post by **ICE King** » Thu Oct 11, 2018 10:57 am

Aaah....Thanks Panic , Legend!

zain_c · Post by **zain_c** » Thu Oct 11, 2018 11:03 am

I just post hoping Panic reply's haha

Post by **Life-GP** » Thu Oct 11, 2018 11:06 am

panic-mechanic wrote: ↑Thu Oct 11, 2018 10:21 am K-jet is a fuelling system only on mk1 and should not rpm limit.
On the mk1 the rev limiter should be in the distributor as a fly out weight on the rotor and by changing / removing that should take care of the limiter.

Wasn't the rev limiter also in the Fuelpump relay? Remember we removed mine in the Cti and added one that didnt do the signal?

buffyza · Post by **buffyza** » Thu Oct 11, 2018 11:20 am

I do recall something like this on a mates CTi..

They were also found in Citi Sport models with HV blocks...

Post by **panic-mechanic** » Thu Oct 11, 2018 11:25 am

So the rev limiter in the fuel pump relay is year model related. And if you have that you can simply use the fuel pump relay for a 16v which will give you 7200 rpm.

buffyza · Post by **buffyza** » Thu Oct 11, 2018 11:55 am

panic-mechanic wrote: ↑Thu Oct 11, 2018 11:25 am

Thought I recognized the name from the 4x4 community...

Wolf Mk2 16V · Post by **Wolf Mk2 16V** » Thu Oct 11, 2018 3:07 pm

I don't think the Sport has a G Cam... thats why I want to buy OP's hehe

buffyza · Post by **buffyza** » Thu Oct 11, 2018 3:49 pm

Wolf Mk2 16V wrote: ↑Thu Oct 11, 2018 3:07 pm I don't think the Sport has a G Cam... thats why I want to buy OP's hehe

My HV had a G cam in it, i wasn't the first owner but don't think it was swapped.

buffyza · Post by **buffyza** » Thu Oct 11, 2018 7:37 pm

Wolf Mk2 16V wrote:I don't think the Sport has a G Cam... thats why I want to buy OP's hehe

What’s a g cam worth these days?

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