c12nz mod list, am I doing this right?

[krazeedude]

I currently have a 1.2 8v in my Corsa. It's speed is ok, but I want more. Depending on the outcome of this thread, I plan to buy a fast-road camshaft, and fit a c16nz inlet, with a c18nz throttle body and a c14nz injector, and I'd do a full service while I'm at it. Would my ECU need a re-map after this?
If so, I'll not bother, as I'm budgeting £120 not including the cam, as I'm quite a tight-****, then with £300 on top, it's not worth it.
What kind of power would I be seeing? I'd hope 60ish, but am unsure.
If I were to do the more in-depth mod, of replacing my crank and rods with those of a 1.3sr (13sb?) to make apparrently a 1.4?

I have read the tuning guides on here, but they don't mention re-mapping.

thanks

[novalew]

wouldnt it be cheaper to upgrade to a 1.6 16v for same kind of gains in standard form?

[staggy_gsi]

wouldnt it be cheaper to upgrade to a 1.6 16v for same kind of gains in standard form?

^^ This ^^ stop wasting money on the 1.2 and start with a bigger lump. even a 1.4 sri motor is 10x better than the 1.2

[brainsnova]

My 1.2 was poo and my 1.3sr flew. Just upgrade

[krazeedude]

While an engine conversion may be cheaper, I'd like to gain the experience and knowledge of building up my engine. Also, I'm 18, and insurance on a 1.6 is funny to say the least.

Hmmm, might call them and ask about engine conversion to a 1.3sr...

[GRUNT 16V]

stop mucking around theres no replacement for displacement !!!!!!!!!!!!!!!!!! just be sure when you do all these mods you tell the insurance company !!! or you will be driving around with a void policy !!

[mowgli]

Do not ask them about a 1.3 sr it will cost the earth...... Look for a 1.4 spi, it will be a straight swap, and way more power as std.....
and while you are building up your no claims, you could be acquiring a 1.6 16v, & rebuilding it. parts are readily available, and the engine is pretty good too

[krazeedude]

I won't bother with a 1.6. While I build up no claims, I'll want a small engine, and there's something about having a highly tuned engine that appeals to me, because I'd be pushing something to it's full potential. I will at some point be acquiring an x30xe and an x25xe, putting the 25 inlet manifold, exhaust manifold, sump, loom and ecu onto the 30 (as the standard ones on the 30 are quite restrictive, then fast-road cams and a re-map once it's in. The Corsa WILL be kept for a very long time as it holds a lot of sentimental value. This won't be happening for a few years yet though.

Anyway, you're talking c14nz? I want to start tuning engines, as for god-knows-what reason, I think it'll be fun lol! (a feeling that'll last until I blow one up) SO, on a 1.4, if I were to so the same mods as stated on the original post, what kind of power would be expected, assuming a good engine to start with?
Also, as pretty much the only difference between it and my engine is the displacement, I could buy and fit the inlet mods and cam, and swap it over come conversion time ;)

[krazeedude]

I may as well ask, other than cc and injector, and I assume inlet, what's the difference between the c18nz and c12nz? Would anyone recommend an 18 instead of 16, would it be a wise move, or seriously stupid with insurance, (I'm 18 and paying £1280 with admiral, all mods declared obviously)

[_Jake]

I won't bother with a 1.6. While I build up no claims, I'll want a small engine, and there's something about having a highly tuned engine that appeals to me, because I'd be pushing something to it's full potential. I will at some point be acquiring an x30xe and an x25xe, putting the 25 inlet manifold, exhaust manifold, sump, loom and ecu onto the 30 (as the standard ones on the 30 are quite restrictive, then fast-road cams and a re-map once it's in. The Corsa WILL be kept for a very long time as it holds a lot of sentimental value. This won't be happening for a few years yet though.

Anyway, you're talking c14nz? I want to start tuning engines, as for god-knows-what reason, I think it'll be fun lol! (a feeling that'll last until I blow one up) SO, on a 1.4, if I were to so the same mods as stated on the original post, what kind of power would be expected, assuming a good engine to start with?
Also, as pretty much the only difference between it and my engine is the displacement, I could buy and fit the inlet mods and cam, and swap it over come conversion time ;)

I think he means a C14SE & if your looking into 1.4's what about the x14xe corsa sport engine? people have used them in rally cars etc pushing 180hp.. and by the time youve tracked down a good 1.3 engine and rebuilt it you could of bought a 14xe/se and done alot more too it.

[krazeedude]

I suppose. I don't have a garage. That's why I don't really want to convert YET. I can do a cam in a day, with some help from someone with experience, and same with the inlet mods, it can be built up without the car present, and putting it all on should be in a day. I use my car daily as well, so if I took it off the road, it would make me really sad lol. Also, This year I'm paying £3.50 a day in insurance. That's more than I spend on food. Still, it's better than last year, which was £6.35 iirc. I can quote in years, but for some reason days brings it closer to reality..

[mowgli]

for god's sake, removing & refitting an spi engine is the work of an afternoon, using haynes & an engine lift.

a cam is about £200 for 2-3hp, and will take longer

you can get a 1.4spi for about a ton & it gives you about 30hp instantly with no modified bits so your insurance will not smack you hard for it..

tuning engines is a fun hobby, but the 1.2 spi is just not going to give you enough gains to justify it.

[krazeedude]

For someone with tonnes of experience perhaps. I've never done anything like that. Could I use the same loom, and plug in a different ECU?

[pikey1986]

depending on your location i have a c14nz that can be made available

[krazeedude]

I'm in Stevenage, a bit of a distance. Not planning one for a while.

[mowgli]

For someone with tonnes of experience perhaps. I've never done anything like that. Could I use the same loom, and plug in a different ECU?
how do you think i got the experience?

i wasn't taught it by anyone, its just a case of getting stuck in.

you could find a complete 1.4 spi setup in a scrappers, strip it out of the donor vehicle, make notes, pics etc, then fit it into your current car. the wiring will be pretty much identical, gm aren't into making different looms cos it costs more money.

[novalew]

after telling your insurance company about modifications done on a you may as well stick in a 1.4, have you tried flux insurance for a quote?

[krazeedude]

I've just started a policy with admiral, won't be changing it, as at 18 with all the mods declared, it's £1280. I won't find better tbh. I'm not against getting experiance, but saying it's an afternoons work, is for someone with experience, For me it'd be about 2-3 days haha.

[krazeedude]

Been offered a kent cam from a nova GTE, will it fit? I know the 1.3sr will..

[Stuart]

Yes it'll fit but it won't be ideal.

[mowgli]

Been offered a kent cam from a nova GTE, will it fit? I know the 1.3sr will..

for the same money you can get a 1.4 spi engine..... are you still not getting it???????

tuning a 1.2spi is as much use as a chocolate teapot

[Lewis.]

as they are all saying, there's just no point in trying to tune a 1.2 SPI, for gods sake, SPI is sh*te, and just bolting bits on a 1.2SPI from bigger SPI engines is never going to make it a rocket ship. And you say you can't change an engine because of the insurance, what are you intending to do when you've 'tuned' your 1.2? because I'll bet my boots that they'll charge more for your 'tuned' 1.2 than just putting a 1.4 in it.

My GF's corsa SRI has a C14SE engine, (MPI) 85bhp, close ratio box, and it goes like stink. SO buy one for £200, stick it in over a weekend (get some mates to help if needs be) use the same mounts, shafts and everything. changing the loom isn't an issue, as with the motronic looms, it's easiest to just disconnect the ECU, pull it through the bulkhead and take it out connected to the engine. then to the reverse with the new loom.

and when it comes to insurance, they will ask what engine, you say a 1.4 corsa engine, they say okay. they wont ask if it's an MPI engine, or a SPI engine, or 8v or 16v. I insured my nova with an XE, and it's just insured as a "2.0 calibra non turbo engine" so could be a 2.0 8v for all they know.

[Andy]

Ring your insurance company,ask them how much it will cost extra on the policy to fit a 1.6/1.4 out of another nova.Tell them no modification is required.
Then go from there.Pointless pipedreaming without getting quotes first.
Spi is an absolute bag of bollox,total waste of money.

[novalew]

or just give it another year, put the money aside, gather the various parts and then hopefully with another years ncb and been 19 you can get quotes from specialists like adrian flux etc

then you can just do a engine transplant for 1.4 or 1.6 xe

[krazeedude]

So. Even though I wanted the challenge, and sri motor it is then. Are there any little upgrades for it? Better cam, better inlets ect? I may as well build up a nice engine before it goes in. I'll ring admiral and see how they feel about it. My **** is flinching already. Still, it's only a 1.4.

[mowgli]

after a 1.2 spi, any 1.4 will be a massive improvement, don't start playing about with it until you've enjoyed the extra power the std spec engine will give you

[krazeedude]

Cool, ok, will my standard manifolds fit, or will I need new ones?