Hi im just wondering what would happen if you had a 1.3spi block and put a g40 head and supercharger on it?
Would it work? and what size are the piston's in a g40 block?
Thanks Guy's..
basically it would be an epic fail!
phill j did a similar thing to a 1.0, it lasted 2 miles.
If you went about it sensibly then I dont see a reason why it shouldnt be more than up to the job. You would be best off with the G40 management, probaby just run a little less timing that the standard G40.
However just bolting it on without really knowing what you are doing could lead to catastrophic engine failure like phils lol.
Mind you, did you see the way Phil drove it? :o Phil can break anything given the opportunity! ;D
Given that the spi block isn't really much different to a "G40" one with only the pistons giving a bit more c.r. I reckon it would work if it was mapped properly. Tommo on here is running a basically standard (IIRC?) 1.4 engine with a turbo and carb and is making massive power.
U'll need a map sensor fitted so basically G40 ECU (vaccum line to ECU off the brake servo pipe aswell), G40 fuel pump. IF G40 management then gotta to go MPI, G40 injectors for flow rating, a g40 TB and pipework, unless you can rig up a blow off valve (but then the G40 ecu dont like it), an IC, G40 ISV. I heard of people not putting G40 pistons in, but only running 0.4bar boost to keep charge inlet temps down - but then if you've been in a G40 with the ISV boost hose come off (usually get around 0.4bar) its slow and lacklustre.
So basically whats the point. Get a G40!
Quote from: breadman on February 06, 2010, 12:22:21 AM
Tommo on here is running a basically standard (IIRC?) 1.4 engine with a turbo and carb and is making massive power.
I have skimmed the pistons on my ABD a bit for safety, but I ran my 1.3 spi engine to a good 160/170bhp on all standard stuff, and after many thousands of miles it was all nice and fresh in there after peeking in. Although thats with a half decent turbo. Im not sure if the supercharger will put out air thats a bit hot for that sort of power.