Standard Boost
 

What's the standard boost for a S12 with the standard T2?

6-7 psi mate:ghey

Thanks so 96bhp ( 129bhp flywheel ) is not bad for a 80000 mile engine on standard boost.
So what would the safest psi to take it to without any risk of damaging the engine with and without I/C and what grade plugs?

about 10psi and bcpr-7es plugs.

i bet if you set up you tappets / timing and plug gaps spot on the car will be back to 135bhp. on standard boost you can up the timing from 15dbtc to 17.5dbtc to get a few more bhp`s

Cheers for the info, give me something to think about but before I start tinkering I've got to solve the missfire on no.1 on tick over before playing with anything else.

test your plug leads with a multi meter. from memory if it reads more that 18 ohm its naffed

Thanks but I don't think it's the leads as I replaced them a couple of months ago along with the coil.

I used those orange hotwire leads on my 8v engine and they deteriorated and were nackered in under 2 months. So i bought some Magnacore leads and i did notice the difference in engine performance.

As Shaun says and set the plug gaps to .9

Thats a very healthy bhp figure you have there considering. Exhaust and air filter modifications will help just as much as a boost increase :)

i had a set of orange hot wires too once, and everytime it rained without fail it would only run on 2 or 3 cylinders once spent a whole week on half the engine firing, sounded like an old derv......

i got some genuine nissan leads, that was 6 years ago, and they have never misfired yet. worth paying the extra money

The leads were made up by an auto electrician for me and replaced when it started missing as I thought it could be the leads. The only other thing I can think it could be the is maybe the BOV as this is an unknown type and make being on the car when I bought it and as my co2 readings are all over the place on tick over I don't know if this if faulty.
As for the exhuast and air filter they have already been changed for a cone filter and a 3 1/3 inch system straight through from the turbo. I have an intercooler fitted just need some pipe work to plumb it in now.

try putting a better earth on the coil. this has happened to me afew times

Thats good advice, i moved my coil as i found the standard posistion is a bit of a water trap from the top of the inner wing. and i added a second earth n touch wood i aint had anymore problems with it since:)

When I put the new coil I cleaned up where it mounts so I might try adding another earth and see what happens.

3 1.3" :eek: Thats the bigest bore i have heard of so far on a s12!:D

It's a tad on the noisy side it came with the car so it would of been rude not to use it, though I might change it for a 2 1/5 inch system if only to stop my windows vibrating when the cars cooling down.

Keep it and Put a performance straight though middle silencer in :)

Another question how easy is a T25 to fit? And if I fit one will the timing need adjusting at all? The reason I am asking is although I have a spare T2 there is a srapies near me with a couple of S13's with knackered engines in otherwise I'd be looking a fitting a DET.