Best way to modifi an si

CVH and Zetec tuning, suspension and braking mods.
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Best way to modifi an si

Postby JayJay on Wed Jan 14, 2004 11:48 am

in terms of the engine...i have a 1.6 16 valve...wot can i do to it besides an engine repleacement that wud give it more power?
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Postby Phil Si on Wed Jan 14, 2004 6:05 pm

hmmm what to do without a complete engine change... :D

swap cam cover with 2.0 mondeo version...
Swap the head of a 2.0 over...
change the pistons to 2.0 versions
replace valves with 2.0 versions
change the bottom end for a 2.0 version
and put some oil in it :-)
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Postby xander7 on Wed Jan 14, 2004 7:27 pm

you won't get much out of the si 16v lump, as the head is too restrictive with respect to tuning. the easiest option most people opt for is to drop a 2.0l mondeo engine in. 135bhp as standard, and more easy to tune.

you can obviously go the other route of filter, full exhaust system, de-cat, 2.0 throttle body, uprated cams, chip etc, but it is great expense for little return. i would at a guess say you may get up to 115bhp-120bhp with those mods, but it does depend on engine (one guy on here put a filter and exhaust on and got 97-98bhp on the rollers).

2.0l is a better option

HTH

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Postby Fiestasi-Andy on Thu Jan 15, 2004 10:29 am

as xander7 said they are too restrictive. Get a 2.0 in it i was i had.

Who got those results?
My Bad!

Sorry
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Postby zetec_si on Thu Jan 15, 2004 1:45 pm

Dave106Gti got 96-97 when he rolling roaded his Si. Just had exhuast and filter I think.
Mk3.5 1.6 Si -> 2.0 Zetec Conversion - SOLD :(
MKIV Supra, S362 Billet Single Turbo (624.7HP/520ftlb) - http://www.youtube.com/user/MrG33kman
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