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Mothballs and octane boost ???
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Pep
900RPM



Joined: 14 Jun 2021
Posts: 949
Location: Georges Hall, NSW

Posted: Tue Apr 20, 2021 11:33 am    Post subject:

I don't know if the Valve Shield is doing anything or not on my Clevo but I still put it in every time....It runs over 10:1 compression and will ping (pink) on standard ULP...It will run like a hairy goat on LRP.....As far as Optimax or any other high octane ULP, I can't pick the difference..They all seem to perform well and better mpg than standard ULP. I do know that there are differences in quality in the cheap brands. I recall telling my mate a few years back, don't use Woolies fuel...its got the most crap in it. Over the past months he has been complaining to me that his VR Dunnydore is running rough and hard to start. He replaced plugs, leads and even mufflers, still no better. He finally told me that he does his shopping at Woolies and uses the vouchers to get cheaper fuel...guess where....yep, ......He has now been back onto quality fuels and the Dunnydore is purring like a kitten again.....Also, I have read somewhere that the correct term is pinking..not pinging as we all seem to adopt...
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FRANK BASILE
500RPM



Joined: 07 May 2021
Posts: 598
Location: MELBOURNE

Posted: Tue Apr 20, 2021 12:33 pm    Post subject:

Franky, what set up are you using for straight gas? I have been using Impco onverters feeding Impco "1@20" mixers adapted to throttle bodies of the respective engines [Holden 202, and 308 ]. with good results.For the 350 Chev I intend using a"50@70" mixer adapted to the quadrajet throttle body.For the 289 I have a ca225 gas carby set aside .I can recall reading that the gas is close to 110 octane,unless I get into the modern era of computerised fuel injection,the gas is the way to go........Frank.
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 207
Location: Cranbourne North

Posted: Tue Apr 20, 2021 1:20 pm    Post subject:

Gas may not be the way to go as I have heard in 2005 they are planning to add an excise to gas prices putting them up near petrol prices icon_cry.gif .
Now as most of us already know a car will use more gas than petrol, just took the government that bit longer to work out .
I have heard this from a mate who works at GMH, apparently they were going to go with straight gas but got wind of the excise and scrapped that programme.
This is what I have heard second hand but it doesn't surpise me that they would do it. Guess we wait and see. Maybe somone else has heard the same thing?
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FRANK BASILE
500RPM



Joined: 07 May 2021
Posts: 598
Location: MELBOURNE

Posted: Tue Apr 20, 2021 3:09 pm    Post subject:

You are correct devilrod ,re the excise, it is to be phased in.The price differential to petrol ,and taking into acc the marginal extra consumption,it will still be cheaper to run your vehicle.Recently we had concerns of a local gas tank manufacturer [APA] closing down because of the impact of the excise,various meetings with the Local member of parliament ensued,and it appears now that all are happy and it is business as usual,the thing I like about this stuff is the removal of all the hang on crap in the engine bay................Frank.
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bcal
700RPM



Joined: 04 Feb 2021
Posts: 722
Location: The Shire, Sydney

Posted: Tue Apr 20, 2021 4:27 pm    Post subject:

The standards (if there are any) for LPG are probably worse than petrol.
There's no way of knowing whether you're getting pure propane or a mixture of propane and methane and what ever else.

Time the government stepped in and set minimum standards for fuels and enforced them. God knows they collect enough revenue from it that we should at least have some assurance that we are getting what we pay for.

I've often wondered if the refiners dispose of most of their intractable chemical by-products by blending them with fuels for us to burn and pollute the atmosphere instead of them. Weren't they the ones that promoted cat converters so that they could use lower grade sulphurous crude stocks without upgrading their plants?
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Outback
Just Idling



Joined: 06 Mar 2021
Posts: 193
Location: Nhulunbuy

Posted: Tue Apr 20, 2021 11:20 pm    Post subject:

I know I'm a little slow on the uptake here,

Anyway, when I was crewing for a Litre Sprintcar team, we used to mix some Acetone with the Methanol to raise the octane up to Shell A race fuel, it seemed to be a cheaper way of achieving the same result.

Outback
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Franky
200rpm



Joined: 18 Jun 2021
Posts: 219
Location: Darwin

Posted: Wed Apr 21, 2021 11:14 am    Post subject:

FRANK BASILE wrote:
Franky, what set up are you using for straight gas? I have been using Impco onverters feeding Impco "1@20" mixers adapted to throttle bodies of the respective engines [Holden 202, and 308 ]. with good results.For the 350 Chev I intend using a"50@70" mixer adapted to the quadrajet throttle body.For the 289 I have a ca225 gas carby set aside .I can recall reading that the gas is close to 110 octane,unless I get into the modern era of computerised fuel injection,the gas is the way to go........Frank.


I'm using a OMV1 R90/E complex converter and 2x basic home made mixers similiar to sprint gas setup on top of tunnelram with holley base plates....... Gas reasearch Cam, dizzy set up etc in a 308-338

Gas up here is cookin grade pure propane so is the goods, however at 64c p/l plus excise when it comes in will not be worth running Have spent too much money now..... should of gone efi however started all the engine stuff on the 37 2 yrs ago..when didn't know any better... all done now n just needs wires to start.
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FRANK BASILE
500RPM



Joined: 07 May 2021
Posts: 598
Location: MELBOURNE

Posted: Wed Apr 21, 2021 12:12 pm    Post subject:

At my local servo[Safeway outlet] LPG swings between 25.9cpl to 38cpl,whilst ULP swings between 87cpl to 98cpl ,and of course I have to add another 4cpl for the lead replacement crap................Frank.
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Mr34
Rookie


Joined: 11 Jun 2021
Posts: 95
Location: QLD

Posted: Sat Jun 26, 2021 1:41 pm    Post subject:

I used Impco on one car and it was good, then the next car i had Gas Research twin throttle body set up.
GRA was really good setting it up and all. the only gripe i had was that you had trouble getting the rocker covers off with the throttle bodies hanging over each cover.
Gas runs 10% hotter aswell. If the cooling system is not up to scratch, you wil get overheating. I had cooling problems the whole time i used gas in both cars, was forever chasing the problem, and lack of funds didnt help. you have to make sure your water pump is in good nick, and that the water system has no 90 degree bends and stuff to and from the concerters etc. For some cars it is beneficial to install a water vapour removal tank in the outlet pipe of the engine cooling water, removing water vapour (steam) from the system is important for pwer too (apparently).
There is a company in melbourne that makes an 'Eco-therm' thermostat relocation device that is good for controlling engine temp too. Does anyone have their number?

And, what is the go with water injection? From what i have read it is meant to reduce pinging in an engine. No one seems to use it anymore. Couldnt you set it up so that the EFI computer controlled an amount of water to be atomised into the manifold along with the fuel injection?
Maybe water injection has been discussed here before, ill go search....
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bcal
700RPM



Joined: 04 Feb 2021
Posts: 722
Location: The Shire, Sydney

Posted: Sat Jun 26, 2021 1:57 pm    Post subject:

Quote:
Maybe water injection has been discussed here before, ill go search....


Try here http://www.msefi.com/index.php
I've seen the topic discussed there but not taken much interest myself.
Maybe they're using MS as water injection control
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