Mk1 CTI 1.8 changed to Carb - Help on performance increase

Hi All

I owned a Mk1 CTI (with performance cam and Power Pipes exhaust) and recently just changed from the K-jet system to Carb due to issues with the K-jet system i.e. fuel not pumping.

The Carb runs fine but seems to lack the performance that I had with the k-jet system

I'd like to thoughts on how I can improve the performance on the car

Thank you
Jabu

Which carb did you change over to?

Standard pierburg or webber will be down on power over the k-jet as fuel is no longer being injected into the engine,.
Carb feed cars standard 90bhp.
Injection cars standard 112bhp.


This is also in the wrong section… small block carb cars are 1.1 and 1.3 engines.
Mods will hopefully move so you may get more replays to your problem. :-) 

Hi Mark1gls

Thank you for your response

I'm not sure about the carb type but I'd think it's a Standard pierburg that it came from a Citi golf 1.3

My apologies for posting on the wrong section

If the carb came off a 1.3 car and yours is a 1.8 it will need resetting and set up for your car.
K- jet will give you more power and better fuel economy than a carb.
If you still want to stay with carbs you will be better off using bike carbs but they take some setting up and will burn more petrol.
Ive not touched bike carbs but there is plenty of info out there about bike carbs on a Mk1.

Thank you for your response

Given what you've said about the k-jet giving me more power and better fuel economy than a carb, one mechanic advised to have it converted to Mp9 system (the Citi Golf Velocity fuel system with the same block)

What is your thought of that?

Sorry but don't know any thing about the Mp9 system or even heard of it as I don't think it was available in UK , I only know about the simple old school k-jet and carbs from my 2 cars.
Had a play with the digifant injection system in a couple of Mk2 Golf GTi I used own a few years ago but any thing built after 1988 is a mystery to me with all this electrical sensors, computer brains, cats in exhausts etc…  

Ohh I see…

I guess I will try and have the K-jet system repairs by Bosch and see how it goes, or go for the bike carbs as you mentioned earlier and see how it goes

Many thanks for your wonderful insight

Jabu  

Stick up a new thread in the fuelling area with your problem and I'm sure we could give you some things to look for, there was a few threads not that long ago about problems with running and lots of info on how to fix problems so have a look in that section.
 

Many thanks, we'll do that right away  

just to add the main reason for 1.8 carb beign 90bhp is because the cam, dizzy and head are inferior. if carb is setup properly with a GTI engine it will have the same or more power