Jump to content
SAU Community

Recommended Posts

My brother recommended to take it out to improve fuel economy as modifications to the vehicle are currently limited to an FMIC, air pod and turbo-back exh.

After i took out the SAFC2 the car was running perfectly normal, no boost cuts, smooth as silk; it was only once i had changed the plugs that i got the boost-cuts.....

Dude, will all due respect, your brother doesn't know what he's talking about.

  • Replies 44
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

lol ^

he's right. u need some kind of piggy back to bend the signal, so that you can run more boost without reaching the stock boost cut limits.

also, you said the problem started after you changed your plugs. what gap are the new ones? if they are standard nissan, they will be 1.1mm. you need to use closer to 0.8mm. coz it might well be a spark issue. all power disappears for a second at around 4000 - 5000 rpm when the vct timing changes. thats a standard occurance on skylines with spark issues.

Dude, will all due respect, your brother doesn't know what he's talking about.

He owned a 450hp R33 gts-t, but I'm not going to argue or say anything more....

Anyway, the SAFC2 can't have anything to do with this as after i removed it the car was still running perfectly fine....

lol ^

he's right. u need some kind of piggy back to bend the signal, so that you can run more boost without reaching the stock boost cut limits.

also, you said the problem started after you changed your plugs. what gap are the new ones? if they are standard nissan, they will be 1.1mm. you need to use closer to 0.8mm. coz it might well be a spark issue. all power disappears for a second at around 4000 - 5000 rpm when the vct timing changes. thats a standard occurance on skylines with spark issues.

sigh :)

The new plugs are the NGK (i think) replacement plugs called platinum laser, and they are gapped at 1.1mm. To change the gap from 1.1mm to 0.8mm can i simply remove the plugs re-gap them and put them back in? Or do i have the buy new plugs?

Dude, I'm not going to slag your brother off, just saying he was wrong. If you don't get somethign for them to tune, then you may well be wasting your money on the dyno tune, as all they'll be able to do is wind back the boost controller till it stops hitting boost cut.

sigh :)

The new plugs are the NGK (i think) replacement plugs called platinum laser, and they are gapped at 1.1mm. To change the gap from 1.1mm to 0.8mm can i simply remove the plugs re-gap them and put them back in? Or do i have the buy new plugs?

you could do that. but you'll have to be careful because the platinum tips can crack. so use a softish piece of wood to tap the tip against, gradually, till you get it there.

or you could go buy some NGK copper plugs, already gapped to 0.8mm for under $20 for 6. they oftenwork beter anyway, but need to be changed around 10,000kms.

Dude, I'm not going to slag your brother off, just saying he was wrong. If you don't get somethign for them to tune, then you may well be wasting your money on the dyno tune, as all they'll be able to do is wind back the boost controller till it stops hitting boost cut.

It's fine man, i relaise you're not doing that. It was just that he told me to get the boost controller tuned for a Lo and Hi setting....

you could do that. but you'll have to be careful because the platinum tips can crack. so use a softish piece of wood to tap the tip against, gradually, till you get it there.

or you could go buy some NGK copper plugs, already gapped to 0.8mm for under $20 for 6. they oftenwork beter anyway, but need to be changed around 10,000kms.

Ok i'll give the first option a try and if it becomes too difficult i'll go buy some copper plugs already gapped at 0.8mm.

One other thing, won't the platinum plugs foul quite easily once you start turning the boost up/etc?

Whats boost going up to on your gauge ??

My boost gauge is my boost controller :)

It goes to 0.7 bar on Hi setting, 0.5 bar on Lo setting. So thats 9.8psi on Hi and 7psi on Lo. Boost-cuts on both settings

One other thing, won't the platinum plugs foul quite easily once you start turning the boost up/etc?

Fouling is caused by overfueling, which is what will happen now that you have the SAFC removed. If you had the SAFC you could have increased the boost, and then got the SAFC retuned to keep the AFR's all good.

I agree with MonkeyBoy, get the NGK BCP6ES copper plugs, there cheap, come gapped at 0.8mm and means you won't wreck the platinums if that isnt the real problem.

was your bov leaking?

by blocking off a leaky bov you could have increased the boost pressure the engine sees and thus hit boost cut.

We put in the solid BoV gasket the day before i changed the plugs and it was running absolutely normal, just gave the turbo flutter sound....no boost-cuts then....

We put in the solid BoV gasket the day before i changed the plugs and it was running absolutely normal, just gave the turbo flutter sound....no boost-cuts then....

shouldnt have listed that as one of the things you changed to cause this problem (your first post)

hard to help unless all the info is there

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...