Do octane boosters work, im runing a prova chip ecu in my 94 sti, sumone recomended i use octane booster to increase octance to 105 to get full power out of it and stop it spiking.

Isit possible to do so ?

Which OB are recomended ?

Cheers

 

You wont need to run 105 ron fuel, anything around 100 ron will do, so v power (the best) or tesco 99 (not too bad) will suffice, though your best having some sort of knock detection, I would suggest a KS3 as there is no point in spending money on octane booster if you dont require it, if your seeing det then yes, add the OB but you may find your ecu just enjoys the good old 99+
But if you really want some then either NF or I used millers octane plus, just add the lot to a tank

Tony

 

Or get the map checked.

Nothing will kill an engine quicker than heavy det.

 

So is vpower the best fuel to use, what octane isit ?

Is tesco 99 a 99 octane, is that no good ?

Sorry but whats a KS3, what does it do ?

Would millers OB be ok for 20 litre of Vpower, what will that raise my octance to ?

Who can check my map, im based in the manchester area.

 

V power is 99 ron, tesco is "99" ron, millers raises 50ltrs by 2 ron, nf raises it slightly more but not alot.
You can speak with Andrew Carr, he is on here occasionally or go to www.ladsoc.co.uk as he is on there.
A KS3 is a knock analyser, not the cheapest but it makes noises when you get det and you can see the level of det that your engine has. www.phormula.co.uk and look for the video
www.superhids.co.uk do them cheaper though

Tony

 

Would i be ok to use millers OB with 20litres of vpower, as millers the only OB my local motor shop sells.

Can the Prova chip be remaped ?

KS-3 are a bomber lol

 

Tony, the new Millers raises Ron by 3 now. http://www.camskill.co.uk/products.p...m1b42s28p56394

 

Yis, they work. Some better than others.
Have a look at this test. Second time i've posted it in three days.

 

So me running vpower is ok with my prova ecu, and put in some OB on weekends

my car has the following mods,

prova ecu
Blitz induction kit
full decat exhaust system
decat downpipe
original sti intercooler
decat manifold and up pipe
i guess original 440cc injectors
and a td05 turbo.

the car is very powerful, has alot of torque, just keeps on going. but at time it just starts spiking,feels like its over boosting or fuel cuting of with a pop from the exhaust.

 

Bare in mind, with a standard MAP sensor, regardless of the Prova you will see cut at c.1.2bar.

If you are 100% sure that your engine is running 100% **** on then a mbc can be installed to cap the boost (reduce it a little) to prevent cut.

 

well iv just realised today that when i rev my car to 2000rpm on standstill, my CEL light comes on and it idles rough til i let go of accelerator, and the CEL will also disapear.

Also when im driving , itl kind of jerk between 1000rpm - 2000rpm but no CEL comes on.

What could that be ?

would tuning from the actuator help ?

 

Have you checked for fault codes?

I'm unsure what could be the cause atm. But for sure, tuning the actuator will not prevent/cure a CEL.


Do a code check and post back.

 

Yes will give a reply when checked.

Your a helpful person, cheers mate

 

No worries fella. That's what Snet, and Gen Tech specifically is all about.

 

Tuning the actuator, will that help to lower the boost and stop it from hiting boost limiter, or would i need a manual boost controller

 

Personally, i would (and do) run an MBC rather than messing with the actuator.

Unless of course the actuator has been previously adjusted and is causing the over boost.

 

Yeh it was tampered with, it was tuned full way , so iv detuned it, i think i need to get a mbc from ebay. and set it up right.

 

The only one i would use and recommend is this one. Mine arrive with in a week no problems.
They are available in the UK on ebay but are more expensive, search for 'dawes device'.

 

Isit a eazy fitement, does it work, hows it benifited you if you dont mind me asking

 

You should still get something like a KS3 to monitor the engine, in reallity you should have a KS3 and something to check the A/F ratio as your car sounds like it needs it.

Tony

 

This issue must be rectified before you fit any aftermarket boost controller. As i said, you must 100% sure of the cars health first. It will not cure anything apart from overboost/boost spike which can be caused by other under laying problems.

It is a very easy fitment and in your case would replace the OE BCS which is why it is imperative your engine is A1 before hand.

Tony, as per, is correct.
You should at the very least have a rolling road session with a knowledgeable operator to have the fueling and other variables checked/corrected.

Start at the begining and work through it. A quick fix is in my experience, is not normally a fix at all.