head question

[gazz]

hi, was wondering if a 1.3 sr head will fit on a 1.6 gte block?
if so would i gain anything?
it will be running on t40's aswel.:thumb:

[lee coley]

im sure a mate had a 1.6 bottom end with a 1.3 sr head an XR2 twin choke webber with 4 branch manifold,not sure if it was any quicker,id just put the 1.6 gsi/gte engine in it with the t40's bolted on.

[Adam]

Keep with the gte head.
Way better than 1.3sr.

[gazz]

cheers.. i'll stick to 1.6 head then..:thumb:

[burgo]

if you want to chang heads that bad use a 1.4 sri one

[Adam]

GTE!
sri head pushes cr up too high.

[gazz]

think i'll stick to gte one..
i thought i'd ask as i'm new to nova's,
was into cav gsi's...

[burgo]

GTE!
sri head pushes cr up too high.whats to high ??

[Jon_nova1]

Compression ratio?

[burgo]

Compression ratio?no i meant what does he concider to high

[Stuart]

anything over 11:1 is a bit lairy for road use... pushes combustion temps up and can heat cycle the pistons too much

[Adam]

no i meant what does he concider to high
Someone on here tried it, and their engine would hardly run at all.

If you look at a sri head and a gte/gsi head side by side you realise why, sri head is a super skimmed gte head.

[burgo]

i remember someone posting up the cumbustion chamber volumns before, anyone else remember it cos i could work out what the compretion ration would be if i knew that

[SRI crazy]

i was told that a 13. and a 1.6 head were the same, dont know if that is true

[mikey14sr]

i remember someone posting up the cumbustion chamber volumns before, anyone else remember it cos i could work out what the compretion ration would be if i knew that

Think that might have been me:confused: can't remember how I worked it out but the only real way to measure the combustion chamber volume is to er, measure it! lol

I'm running a skimmed a few times 1.3 head on an sri bottom end and the cr is around 11:1, probably higher. It refuses to run well unless it's drinking super unleaded.

I know fitting the 1.6 head to a 1.3 drops the cr enough to run a low-pressure turbo system.

[Adam]

Yep/\
If you look at a 1.6 head you see why its drop cr so much, deep combustion chambers.

SRi crazy-The heads are different.