Outer Limits 4x4 Board

hi guys

I have a GQ patrol TB42 and i'm planning on running it on gas 99% of the time but when up the beach etc i might get stuck and need to use fuel to putt home.

I'm wanting to use blow thru as draw thru have heard bad stories..

Is there a carby that can do this witout leaking under 10 - 12 PSI in blow thru or is straight gas with a Gas Research Throttle body the only way to go.

Any tips or anything would be great as i have no idea to get this turbo installed by or even what i should look at getting.

I live in Noosa on the Sunshine Coast by the way..


Thanks alot

Rick.!!

chapmans at cooroy would be the best guys to talk to, but having said that id be a bit wherey about them tuning it.

Not sure what you mean but lpg requires vacum to draw it in except in the case of the vapour injection setups. If you run dual fuel it will always be a draw thru system whether its efi or carb, even straight gas like the gas research still require engine vacum to pull the gas in. Being a shorty with limited space for tanks i would have it dual fuel.

Loanrangie wrote:Not sure what you mean but lpg requires vacum to draw it in.

Not quite, it needs a difference in pressure between the atmo side of the secondary diaphragm and the mixer side of the secondary diaphragm.

You could theoretically run a blow-through mixer provided the atmospheric port of your converter was plumbed up to the pipe between the turbo outlet and throttle. You will still end up with the pressure difference between the two sides of the diaphragm.

What you need to be carefull of is finding a converter/mixer combo that can flow enough fuel for full throttle/boost but can still be tuned to idle. Also you will need to set up the converter as close as possible to the mixer to prevent any lag between air flow and fuel feed when you rapidly accelerate, otherwise it will lean out and thats bad, especially considering its forced induction.

A friend of mine has 327 with a big predator carb running gas. I don’t know how it works but it works good!

Gribble wrote:

Loanrangie wrote:Not sure what you mean but lpg requires vacum to draw it in.

Not quite, it needs a difference in pressure between the atmo side of the secondary diaphragm and the mixer side of the secondary diaphragm.

You could theoretically run a blow-through mixer provided the atmospheric port of your converter was plumbed up to the pipe between the turbo outlet and throttle. You will still end up with the pressure difference between the two sides of the diaphragm.

What you need to be carefull of is finding a converter/mixer combo that can flow enough fuel for full throttle/boost but can still be tuned to idle. Also you will need to set up the converter as close as possible to the mixer to prevent any lag between air flow and fuel feed when you rapidly accelerate, otherwise it will lean out and thats bad, especially considering its forced induction.

He didnt mention a turbo ?

Loanrangie wrote:

Gribble wrote:

Loanrangie wrote:Not sure what you mean but lpg requires vacum to draw it in.

Not quite, it needs a difference in pressure between the atmo side of the secondary diaphragm and the mixer side of the secondary diaphragm.

You could theoretically run a blow-through mixer provided the atmospheric port of your converter was plumbed up to the pipe between the turbo outlet and throttle. You will still end up with the pressure difference between the two sides of the diaphragm.

What you need to be carefull of is finding a converter/mixer combo that can flow enough fuel for full throttle/boost but can still be tuned to idle. Also you will need to set up the converter as close as possible to the mixer to prevent any lag between air flow and fuel feed when you rapidly accelerate, otherwise it will lean out and thats bad, especially considering its forced induction.

He didnt mention a turbo ?

yes he did

Mulisha wrote:Any tips or anything would be great as i have no idea to get this turbo installed by or even what i should look at getting.

markil wrote:

Loanrangie wrote:

Gribble wrote:

Loanrangie wrote:Not sure what you mean but lpg requires vacum to draw it in.

Not quite, it needs a difference in pressure between the atmo side of the secondary diaphragm and the mixer side of the secondary diaphragm.

You could theoretically run a blow-through mixer provided the atmospheric port of your converter was plumbed up to the pipe between the turbo outlet and throttle. You will still end up with the pressure difference between the two sides of the diaphragm.

What you need to be carefull of is finding a converter/mixer combo that can flow enough fuel for full throttle/boost but can still be tuned to idle. Also you will need to set up the converter as close as possible to the mixer to prevent any lag between air flow and fuel feed when you rapidly accelerate, otherwise it will lean out and thats bad, especially considering its forced induction.

He didnt mention a turbo ?

yes he did

Mulisha wrote:Any tips or anything would be great as i have no idea to get this turbo installed by or even what i should look at getting.

Somehow i completely missed that line

Thanks guys i'm thinking Gas Research is really the only way i can go even though some people reakon it's a prick to tune.

On ebay there is a kit for sale just not sure if it would be any good or not.

I was woundering if the bolt pattern on the manifold that's comming with it would bolt onto my Tb42 ...

Gas Research stuff is bloody expensive really $440 for the throttle body and then another $220 for the converter.

Cheers

Rick.

http://cgi.ebay.com.au/GAS-Research-Thr ... dZViewItem

it probly wouldnt be hard to make an adaptor to make it fit if it didnt.

When hooking up the Gas research Throttle body does it automatically go to blow thru or is draw thru?

I don't quite under stand how this blow and draw thru works..

I mean the gra throttle body will be mounted in the same spot as my carby but then how do people get blow thru to happen?

Thanks

Rick.

Mulisha wrote:When hooking up the Gas research Throttle body does it automatically go to blow thru or is draw thru?
I don't quite under stand how this blow and draw thru works..
I mean the gra throttle body will be mounted in the same spot as my carby but then how do people get blow thru to happen?
Thanks Rick.

Rick, it's really simple. Blow through is when your Carby/Throttle Body is mounted after or downstream (pressurised air) of the turbo.
Draw through or Suck through is when your carby is mounted before or upstream (non pressurised) of the turbo.
Regards Andrew.

As for mounting your Gas Research assembly I'm pretty sure you will need some sort of adaptor to mount it to your inlet manifold so that it is mounted horizontally not vertically like your carby is now. Someone will correct me if I'm wrong I'll bet .
Regards Andrew.

awill4x4 wrote:As for mounting your Gas Research assembly I'm pretty sure you will need some sort of adaptor to mount it to your inlet manifold so that it is mounted horizontally not vertically like your carby is now. Someone will correct me if I'm wrong I'll bet .
Regards Andrew.

yeah tats correct as for running blow threw it needs to be set up to do this by someone who knows what they are doing, if not you will have a lot of problems, give gas reasearch a call they should be able to help you out.

Yeah i have to buy an adaptor 90 degree bend for $110 bucks..

Then the t/b $440

Then converter $220

Adds up quickly i keep questions why i couldn't use my carby set up... just whack a pipe on top of the mixer were the air cleaner sits at the moment ..

Rick...

Jee ya learn alot from doing a turbo conversion ..

i think youll have a lot of probs trying to run boost threw the std carby, so if you wanted to do duel fuel it would be best to run efi or piss petrol off all together and just run the gas reasearh gear, its well worth the extra dollars to go the gas reasearch option. as for that ebay one the price it went for id rather go the new option a least you know what your getting. the adaptor wouldnt be very hard to make if you knew someone with a welder.

Thanks Grinch yeah i bidded went to $405 then i backed out as i rather brand new stuff for that price..

I'm looking at taking the car to Chapmans in Cooroy tommorow afternoon and getting them to fit the hole lot including the turbo and GRA stuff then picking the car up with it all fitted ready to drive to nambour for the zaust..

Do you have msn grinch?

Rick.