1.2 8v tune

[General Baxter]

NOW I DONT WANT ANSWER LIKE A CLIFF OR HILL OR FIT A LARGER ENGINE

im after a few cost affective mods to make the 1.2 have a bit more poke,
now ill be ohnest and have no idea really on petrol engines lol


cheapo GM mods would be good aswell :thumb:


edit, p.s its carb ;)

[5T1G]

99ron

[General Baxter]

im not that dumb lol

[scottc1088]

1.4sr cam

[craig green]

SR/GTE cam. SR Pierbug 2E3 or perhaps a Weber 32/34. Change manifold to tubular (4 branch) or maybe the SR or GTE designs are better still with the twin downpipes.

Much better off dumping in a cheap 1300 or 1400 block IMO.

Cam is essential though as 1.2's has barely no lift.

[5T1G]

I'd just run it on 99ron until you can put a bigger engine in there! Easy Peasey plus more time driving!

[Adam]

1400/gte cam wont fit as the dizzy drives wrong, so you're fcuked in that department.

Aye, a 1300 8v carb and inlet, and a Sr twin branch exhaust manifold/downpipe/system

[chimp007_uk]

ask stuart lol

[Martin]

use the search big lad

[andy_srt40]

weber repacement carb of ebay??

cam from another engine?

put it on a diet lol

[Philsutton]

I'd just run it on 99ron until you can put a bigger engine in there! Easy Peasey plus more time driving!

Thats a waste of good fuel. Nitrous is the way for cheap power for gains, simple as, or you can waste your money else where an get 5bhp if your lucky.

[meritlover]

40 thou skim, cutback valve guides, cutback valve stems, lightly ported ports, matched gaskets and manifolds, 1.4 cam, more timing advance, better octane fuel, and set the mixture in the carb.

this will make a insuring friendly car that looks like it is a real std 1.2.

if you dont mind and can get an obtain one get a Webber and a maninfolds (exh,in)

im nice and sure you can swap the drive gear from one distributor to another to allow a change of cam. you just need to press out of the roll pin. you can also fit a GTE/GSI distributor to a 1.2 cam by grinding off a lump on the drive.

[_JH_]

stick an e16se head on it?

[Jack]

GTE carb
:wtf:

Higher octane fuel would be ok if you have advanced the timing/compression ratio to suit. Just sticking V-Power into a std 1.2 would probably lose you power, and could damage the cylinders by leaving carbon deposits.

[craig green]

/\/\ I meant cam.....

[burgo]

stick an e16se head on it?no!!


weber repacement carb of ebay??

cam from another engine?

put yourself on a diet lol



:wtf:

Higher octane fuel would be ok if you have advanced the timing/compression ratio to suit. Just sticking V-Power into a std 1.2 would probably lose you power, and could damage the cylinders by leaving carbon deposits.

i have to run mine on super because of how much it is advanced. it knocks its tits off without it lol. does make a noticable difference tho

[tom reid]

GB, I have a webber, inlet and slightly worked SR head/ast1 cam and 4 branch exhaust manifold, would be ideal for you.

[General Baxter]

price, any discount for some fat man love ? lol

[draper]

price, any discount for some fat man love ? lol

your gonna regret that offer

[tom reid]

your gonna regret that offer

No you won't:)

You will however be a life member of The Bumshunters Corporation.

Don't know about prices though, when you looking to start the mods?

[therealnovaboy]

do what merit lover said. and use a weber carb. you could use a gsi/gte cam but dont you need the lobe on the cam for the fuel pump. you would need to use an sr cam? can you not also use an inlet manifold from an astra or somthing , im sure the astra has a better flowed manifold, if i remember right the auto grass boys use them. could you not also use a flywheel from a 1 litre, im not sure but they might b lighter. if it was me id wory about getting the car to handle right first. get decent shocks and lower it then sort the camber and tracking to the tarmac rally settings. id also advise getting a rear anti roll bar and good tyres. you just need good 3 spoke standard jobys with a decent tyre on them.

if you want to go a bit further could you not get an spi throtle body from a 1.6 cav or somthing and mega squirt it. it would look dead standerd and could probly get good power of a decent map. just an idea tho

[meritlover]

indeedly this is the case. a car that handles and brakes well in corners is worth/the same as lots of extra HP. it makes for more corner exiting speeds and makes up for lack of accellerationism.

[Welsh Dan]

Run after it with a grinder :).

[mowgli]

if it still has the std frying pan air filter, replace it, put 1300 manifold & downpipe on it. (where the 2 goes into the one on a std one, cut it open & remove the restriction. old astra/nova challenge trick)

[saloonwoody]

indeedly this is the case. a car that handles and brakes well in corners is worth/the same as lots of extra HP. it makes for more corner exiting speeds and makes up for lack of accellerationism.

WOT THE FCUK IS ACCELLERATIONISM ??? SOUNDS LIKE AN STD :cry:

[Riggy]

baxter get a 1300 crank and rods and use your 1200 pistons, increase capacity to 1400 there , then fit 1300 inlet and carb , 1400 sr cam , dizzy and coil

and a full gte exhaust system

your laughing :thumb:

[burgo]

baxter get a 1300 crank and rods and use your 1200 pistons, increase capacity to 1400 there , then fit 1300 inlet and carb , 1400 sr cam , dizzy and coil

and a full gte exhaust system

your laughing :thumb:why not use a 1600 crank and rods in the 1.2 block?

[tom_beverley]

Depends on the dimension from gudgeon centre to piston crown though.

Otherwise the piston will protrude out of the block, plus I'm not 100% but the 1200 block casing may be shorter too.

Either way its varying massively from a 1200 and will need a different head etc so it would be more economic to just buy a bigger engine

[mowgli]

1200 & 1300 blocks are basically the same overall size, the 1300 rods are shorter than the 1200 rods & the pistons are the same height. Yes a 1400 made with 1300 crank & rods with 1200 pistons will give you good power (about 90 with a std 1200 carb) & the tuning potential is huge. BUT it is only worth it if you are doing a full engine rebuild.
I had one years ago & it was v. fast

[Stanley]

I remember a guy called Aragorn had a tuning guide on here and got some good power from the 1.2 IIRC. Sure hes in jail now.....:confused:

EDIT: Here it is... http://www.pngclub.com/forum/showthread.php?t=46466

[Adam]

No he aint.

[Stanley]

I stand corrected.

[Adam]

But yeah, he did get a nice bit of power from his brothers 1.2i with his guide :)

[peester]

baxter get a 1300 crank and rods and use your 1200 pistons, increase capacity to 1400 there , then fit 1300 inlet and carb , 1400 sr cam , dizzy and coil

and a full gte exhaust system

your laughing :thumb:

easy eh..
why dont we just tell this to everyone?

[Adam]

Because everyone will be doing it, and insuring there "1.2 carb nova", when its quicker than 1.4sr's lol

[peester]

sod that ad.. lifes **** enough..

sounds to me like its the holy grail of mechanical room answers.
Maybe its just me, i dont know..
Blatently get more 'how to tune... 1.2 engine' than any other question.. lol.

[Stanley]

Useful info here... http://www.pngclub.com/forum/showthread.php?t=12278
And here... http://www.pngclub.com/forum/showthread.php?t=10905