Fiat X1-9 Chamber Mod-01.wmv

Here's a look at modification used to increase port flow on a Fiat X1/9 cylinder as performed by John Edwards @ Costa Mesa R&D Automotive Machine. Modifying Fiats is just one of the specialty areas of the shop. www.engine-machining.com (949) 631-6376

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[staircast]

the filler looks a little rough... are you preping it before you machine the head?

[fiatnutz]

@staircast - The head was welded and rough cut before it went to the resurfacer for final decking.

[MPWR327i]

One more great video. My question is about the way you increased compression ratio. What material did you use? Aluminium? And how you filled it into chamber? Don't you worry about the temperature inside the cylinder? Thanks for your answer.

[fiatnutz]

@MPWR327i - I use a heliarc (TIG) welder and 4043 filler rod. Temps inside the chamber should be appriximately the same because the volume is kept equal to what was already there. Aluminum heads can run about 1 full compression point higher compression than cast iron head because of their excellent heat dissipation.

[gst69man]

race car status?

[fiatnutz]

@gst69man - Back together again after the big blow-up at the Pro Solo. Sheard the flywheel bolts, broke 3 lifters, bent all the valves, whacked the cam, etc...

[deadbeat86]

Its unbelievable how much I learn from your videos, not only about engines, machining, but also the way you work, I even learn new vocabulary (english is not my native language). Thanks for the uploads and the explanations they are very informative =)

[modelleg]

You're on your way to a hemi!

[pismo10]

Such nice soft aluminum.How deep can you go and no hit the water jacket?

[Lasselkv28]

I am VERY impressed, John.

[citydriver]

@mopar340dave well i guess thats makes sense

[mopar340dave]

@citydriver The exhaust valve is small enough that it is not shrouded and the exhaust is going out, not in.

[citydriver]

why not do the same with the exhaust ports?

[robertopaulinho]

nice !!!!

[johorridoh]

That would be just another method to lower compression when fitting a head modified for a turbo ( original turbo engine 1,3l or 1,4l ) on a normal 1,6 litre block :)

Thanks for the inspiration !

I´ll post this in our FIAT UNO IG Forum