1.8 carb mods

[drew@scirocco.cs.uoguelph.ca (Drew MacPherson)]

Most of us on the list aren't lucky enough to have ever had the pleasure 
of tuning a 1.8 with carbs.

The one thing I will caution you on concerning the installation of an
electric fuel pump is that you be sure to make provisions for an electric
cut-out that's tied to the ignition.  There's been many an engine
compartment fire on a carburetted vehicle that was caused by a high
volume, high pressure pump spraying fuel all over a hot engine.

The stock CIS fuel pump relay does this quite well if you can find one and
retrofit it - I'm sure aftermarket versions are available as well.

Also, concerning the K&N - the performance of your engine is adversely
affected by the intake of hot air from the engine compartment.  
Installing a full-flow filter right next to the engine can hurt
performance rather than help.  Your best bet would be to go with an air
box setup or shrouded free-flow that maintains a free flow of cold air
from the front of the car.

One option to greatly improve performance (but also increase 
hassle-factor) would be to install dual-carbs - which I understand can 
really wake up an engine, but they can also be a pain to tune and 
maintain.  I believe a number of listers have experience with this setup.

Drew

On Tue, 28 Jan 2003, Ian Shaw wrote:

> Hi all
> 
> I am currently modifying my 1.8l carb scala, things i am gonna do:
> 
> 1, K&N bolt on filter
> 2, Full jetex or remus exhaust system
> 3, Fast road/race cam with valve springs, adjustable vernier pulley etc
> 4, Competion fuel filter
> 5, uprated oil filter
> 
> Can anyone advise on uprated fuel pumps and pressure regulator. Wether i
> need to fit an uprated electronic fuel pump and get rid of the other cos i
> am running a stock mechanical fuel pump. What makes models fitting etc
> 
> Can anyone help on this
> 
> 
> 
> Best Regards
> 
> Ian Shaw
> (Research & Development)
> e-mail: ian.shaw@martin.dk
> 
> Martin Manufacturing (UK) PLC
> 
> Tel:  01507 604399
> Fax: 01507 601956
> 
> Web: www.martin.dk
> 
> 
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