Octane Booster help
Discussion
I desperately need some half decent Octane booster before this Friday, I’m going to a ¼ mile shoot out 
for a magazine and desperately need every last BHP I can get!
Does anyone have any recommendations, plus where can I get it from either by mail (quickly) or from somewhere that sells it in Surrey/M25 area???
for a magazine and desperately need every last BHP I can get! Does anyone have any recommendations, plus where can I get it from either by mail (quickly) or from somewhere that sells it in Surrey/M25 area???
Not really sure what sort of BHP gains you'd get from using octane boosters.
On a normal N/A car shouldn't see big gains if it was designed to run unleaded, unless it has an unusually high compression ratio which is unlikely because most cars are designed to run on 95-97 or less. On turbo'd and supercharged cars you should generally see better gains because a higher octane rating means less knock so you can theoretically increase the levels of boost and/or run more ignition advance.
On my car that runs boost with an N/A ignition map the gains hopefully should be pretty good as it will mean the ignition won't have to be so heavily retarded, or at least thats the theory!
Ordered a litre of Silkolene Pro boost and a litre of Aldon Octane Booster so we'll see how it goes
BCA> Busted
On a normal N/A car shouldn't see big gains if it was designed to run unleaded, unless it has an unusually high compression ratio which is unlikely because most cars are designed to run on 95-97 or less. On turbo'd and supercharged cars you should generally see better gains because a higher octane rating means less knock so you can theoretically increase the levels of boost and/or run more ignition advance.
On my car that runs boost with an N/A ignition map the gains hopefully should be pretty good as it will mean the ignition won't have to be so heavily retarded, or at least thats the theory!
Ordered a litre of Silkolene Pro boost and a litre of Aldon Octane Booster so we'll see how it goes
BCA> Busted
I can't actually increase the boost on my car without swapping pullies so will be running same boost.
But my ECU is designed to retard the timing when it detects knock, and so when it runs on standard 95 RON it is running with the timing quite heavily retard from the original ignition map.
The idea of me using Octane booster is that hopefully it will be able to run more ignition advance before it detects knock and so hopefully that should gain me that vital bit of extra power.
But my ECU is designed to retard the timing when it detects knock, and so when it runs on standard 95 RON it is running with the timing quite heavily retard from the original ignition map.
The idea of me using Octane booster is that hopefully it will be able to run more ignition advance before it detects knock and so hopefully that should gain me that vital bit of extra power.
I was going to add the booster to Super Unleaded rather than Optimax as from whats been said on Scoobynet it seems to work better.
I've tried running my car on SUL before and if definitley feels more responsive.
Its currently running original cr of 9.6:1, its farly low boost at 0.6bar and inlet temps are laughably low due to supercharger and large intercooler so its not really a major problem. Although having said that my next project for the summer is to strip engine down and fit forged low comp pistons.
I've tried running my car on SUL before and if definitley feels more responsive.
Its currently running original cr of 9.6:1, its farly low boost at 0.6bar and inlet temps are laughably low due to supercharger and large intercooler so its not really a major problem. Although having said that my next project for the summer is to strip engine down and fit forged low comp pistons.
Your right about the CR it is a little high and I'll be happier when its closer to 9:1
The pistons are custom made by Omega, but a company called GMC Motorsport have had quite a few sets made up in a batch. They're actually cheaper than a set of standard cast ones from Shitroen
I hadn't really thought about at what point it starts to retard the timing, I could do with a knock link or something so that I can get a better idea of what is actually going on.
The ignition map is the standard n/a which isn't ideal as you can imagin! The knock sensor seems to do a fairly good job of keeping the timing in check though, as the cars with properly mapped ignition don't really seem to make significantly more power.
>> Edited by Supercharged on Sunday 6th April 00:09
The pistons are custom made by Omega, but a company called GMC Motorsport have had quite a few sets made up in a batch. They're actually cheaper than a set of standard cast ones from Shitroen
I hadn't really thought about at what point it starts to retard the timing, I could do with a knock link or something so that I can get a better idea of what is actually going on.
The ignition map is the standard n/a which isn't ideal as you can imagin! The knock sensor seems to do a fairly good job of keeping the timing in check though, as the cars with properly mapped ignition don't really seem to make significantly more power.
>> Edited by Supercharged on Sunday 6th April 00:09
£460 +VAT for pistons and rings, using standard bolts, but I'll have to ask around and see if there are any uprated ones available and if it'd be worth upgrading.
I'm really only running fairly low power, the higher spec cars in the UK are running over 200bhp @ wheels, so generally they find out what parts are likely to fail first.
I'm really only running fairly low power, the higher spec cars in the UK are running over 200bhp @ wheels, so generally they find out what parts are likely to fail first.
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