bit of advice needed plz

[naughtynova07]

just wondering if i can stick a set of 1.4sr carbs on me 1.2 spi nova and what other sr parts it would benifit from??

[Stuart]

carbS inffering T40's or the normal twin choke carb?

ps this is a technical question not a "general" one.

[naughtynova07]

just twin choke carbs! would i have to put the whole inlet on and the sr pertol pump aswell?


p.s sorry lol

[Welsh Dan]

You'd need the whole inlet, whole ignition system, and an aftermarket electrical fuel pump (facet) and a pressure regulator. By the time you've done it it would be far easier to fit and declare a 1.4sr engine whole.

[Stuart]

tbh fark all gain to do that really. Its the cat in the exhaust of the spi that is the key limitation

[naughtynova07]

yer i was wondering what to do about the cat can i just fit the pipe off a non cat nova or do i have to get a proper de-cat pipe! think ill leave swaping the carbs then lol

[Adam]

Screw fitting some old ****e Sr carb.
Nowt wrong with SPi system at all.
Its just HEAVILY restricted.

[naughtynova07]

what are the main restrictions then apart from the cat??

[Adam]

The throttle body, the head, the cam is very poor.
The exhaust downpipe is the size of a pee shooter, and is only one branch.

[craig green]

I bet a shonky old B reg Astra 1300 with a 4sp box could wipe the floor with a 1200.

It just makes so much sense not to tune the 1200 IMO. If its a matter of age & insurance just wait FFS!