Technocarb LPG system

[Ext User(a9x5l)]

Does anyone have one these or know of a car using one and how it performs?

http://cars.rasoenterprises.com/Propane-Technocarb-OffroadCarb.htm

--
a9x5l

[Ext User(Ron)]

a9x5l <a9x5l@hotmail.com> wrote in
news:pan.2006.09.24.13.09.47.618834@hotmail.com:

> Does anyone have one these or know of a car using one and how it
> performs?
>
> http://cars.rasoenterprises.com/Propane-Technocarb-OffroadCarb.htm
>

It still doesn't beat an injection system.

[Ext User(veritas)]

Ron wrote:
> a9x5l <a9x5l@hotmail.com> wrote in
> news:pan.2006.09.24.13.09.47.618834@hotmail.com:
>
>> Does anyone have one these or know of a car using one and how it
>> performs?
>>
>> http://cars.rasoenterprises.com/Propane-Technocarb-OffroadCarb.htm
>>
>
> It still doesn't beat an injection system.

I think we all might know that - please re-read the original question.....

[Ext User(Athol)]

a9x5l <a9x5l@hotmail.com> wrote:

> Does anyone have one these or know of a car using one and how it performs?

> http://cars.rasoenterprises.com/Propane-Technocarb-OffroadCarb.htm

Looks like a billet assembly with 4 fixed LPG orifices. Would probably
be intended to work with an italian convertor such as OMVL.

If you think that an OMVL system is suitable for the size of engine and
want a straight-LPG mixer to suit, this thing should be worth about
AU$200 at absolute most.

Personally, I wouldn't touch a fixed orifice LPG system with a barge pole.

Note that there are two quite distinctly different models shown on that
page. The 2nd photo from the top clearly shows a unit that is flanged
at the bottom and screwed to a holley throttlebody in the same way as an
Impco CA-425, while the 4th, 5th and 6th photos show a one-piece version
with the throttlebody integrated.

--
Athol
<http://cust.idl.com.au/athol> Linux Registered User # 254000
I'm a Libran Engineer. I don't argue, I discuss.

[Ext User(a9x5l)]

On Mon, 25 Sep 2006 00:47:52 +0000, Athol wrote:

> a9x5l <a9x5l@hotmail.com> wrote:
>
>> Does anyone have one these or know of a car using one and how it performs?
>
>> http://cars.rasoenterprises.com/Propane-Technocarb-OffroadCarb.htm
>
> Looks like a billet assembly with 4 fixed LPG orifices. Would probably
> be intended to work with an italian convertor such as OMVL.
>
> If you think that an OMVL system is suitable for the size of engine and
> want a straight-LPG mixer to suit, this thing should be worth about
> AU$200 at absolute most.
>
> Personally, I wouldn't touch a fixed orifice LPG system with a barge pole.
>
> Note that there are two quite distinctly different models shown on that
> page. The 2nd photo from the top clearly shows a unit that is flanged
> at the bottom and screwed to a holley throttlebody in the same way as an
> Impco CA-425, while the 4th, 5th and 6th photos show a one-piece version
> with the throttlebody integrated.

The only info I've been able to get on this system so far is that it flows
850cfm and is about half the price of a GRA twin set-up which should make
it about $800ish(If you supply a Holley throttle plate, it's cheaper again
- I'm guessing the price includes converter, solenoid and plumbing though
not sure ).

What I'd like to do, if possible, is just replace my GRA mixers with
something that has a more traditional 4 barrel appearance but mostly for
ease of access to valve gear as the GRA system has to be removed just to
get a rocker cover off, it's a serious PITA!

Any suggestions for a mixer that I might be able to use(that flows at
least 550-600cfm) while preferably keeping as much of the existing
plumbing, and converter(s), which are B2's?

--
a9x5l

[Ext User(Athol)]

a9x5l <a9x5l@hotmail.com> wrote:

> The only info I've been able to get on this system so far is that it flows
> 850cfm and is about half the price of a GRA twin set-up which should make
> it about $800ish(If you supply a Holley throttle plate, it's cheaper again
> - I'm guessing the price includes converter, solenoid and plumbing though
> not sure ).

I'd be wanting to know exactly what is included, as it may only be for the
mixer itself.

I'd also be wanting to know what convertor(s) they use with it, as the OMVL
won't be able to *sustain* supplying enough gas to go with 850cfm of air.

> Any suggestions for a mixer that I might be able to use(that flows at
> least 550-600cfm) while preferably keeping as much of the existing
> plumbing, and converter(s), which are B2's?

Given that the thing you posted the link for has no idle circuit and is
clearly intended for an italian style of convertor, there's no way that
it would ever work with the B2s.

I would have suggested a siamesed pair of OHG X-450s, but they are out of
production and getting hard to come by.

http://www.gameco.com.au/nsw/autogas/carburetion.htm

The mixers shown there are further apart than one pair I saw, where they
had milled the sides flat to butt them right together. They had fitted
them inside one round air filter by having a "figure-8" hole in the bottom
plate.

I have 2 OHG mixers and will use them on the Volvo and Bedford. Unless I
somehow come by another one, the Volvo will run a single even if that is
going to limit maximum power.

I will be looking at what injection system to use in the future, and I'll
convert both the Volvo and Bedford to LPG injection when I find a good
liquid phase injection system at a reasonable price.

--
Athol
<http://cust.idl.com.au/athol> Linux Registered User # 254000
I'm a Libran Engineer. I don't argue, I discuss.

[rmjjj]

Sure Have , Got one on My old WB Statesman 308/350 stroker. 700CFM model leaves GRA crap for dead !How does 155kw at the treads at 4000 Rpm with another 1500 rpm still left on cam when AFR drifted to 17. Estimate around 170 KW at rear wheels when fix stoichy problem. Thats 200KW plus at the flywheel . Wonder what I will get with some decent Heads ?I have run twin 425 imps,twin 450 OHGs both on twin ohg X!,s , twin Gra's on twin B2's. How does 525 HP on a 350 with one 800 cFM technocarb sound. Going to fit a another B2 ,rigged to the secondary ports that comes in at 3600 rpm (Cam sensitive) at a MAP of 0 to 5 ins merc vac progressive.that should stop the AFR going up. Then its 150 HP shot of NOS , (its all been done before!)
Yes I have photos and dyno runs, the technocarb systems blows the others away !!

[rmjjj]

The techno carb system on my Stato will answer all your dreams ,and leave that crappy GRA for dead (One of the top flow benches in Australia , couldnt get more than 500 CFM out of the 2 biggest GRA throttle bodies at 5 ins )GRA quoted CFM is at 28 Ins, who the bloody hell runs at 28 ins ? The techno's top end will blow you away if you maintain the AFR over 3500 ,just swap one of your B'2s for a possibly an AIROD a40 super . or like me try and find a bigger converter that will hang in there !!!!!!!

[Ext User(John McKenzie)]

rmjjj wrote:
>
> Sure Have , Got one on My old WB Statesman 308/350 stroker. 700CFM model
> leaves GRA crap for dead !How does 155kw at the treads at 4000 Rpm with
> another 1500 rpm still left on cam when AFR drifted to 17. Estimate
> around 170 KW at rear wheels when fix stoichy problem. Thats 200KW plus
> at the flywheel . Wonder what I will get with some decent Heads ?I have
> run twin 425 imps,twin 450 OHGs both on twin ohg X!,s , twin Gra's on


So do you want to sell the ohg mixers that you had on there previously?




>
> --
> rmjjj

--
John McKenzie

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[Ext User(Athol)]

John McKenzie <jmac@alphalink.com.au> wrote:
> rmjjj wrote:

>> Sure Have , Got one on My old WB Statesman 308/350 stroker. 700CFM model
>> leaves GRA crap for dead !How does 155kw at the treads at 4000 Rpm with
>> another 1500 rpm still left on cam when AFR drifted to 17. Estimate
>> around 170 KW at rear wheels when fix stoichy problem. Thats 200KW plus
>> at the flywheel . Wonder what I will get with some decent Heads ?I have
>> run twin 425 imps,twin 450 OHGs both on twin ohg X!,s , twin Gra's on

> So do you want to sell the ohg mixers that you had on there previously?

Bastard. Beat me to it. :-)

--
Athol
<http://cust.idl.com.au/athol> Linux Registered User # 254000
I'm a Libran Engineer. I don't argue, I discuss.

[rmjjj]

Long gone old boy,though I still have 1 OHG X2 converter and lots of resprung B2's.By the way, both the twin 425's and the the twin 450 OHG's way outperform the 510/480 GRA system. The GRA system is nice for idle and lower midrange, but hopeless for top end. It seems that there isnt a decent converter than handles 400 hp plus. What engine/ Hp are you running
Regards Mark

[rmjjj]

well its the same as petrol systems, at everything but flat out WOT the managed injection system will be better ,but for things like drag racing,especially for non-supecharged engines there is no difference.Flat out is flat out
engine is a pump etc.Besides the all the new Gas injection system injectors dont last.Its a case of horses for courses
Regards Mark

[Ext User(John McKenzie)]

Athol wrote:
>
> > So do you want to sell the ohg mixers that you had on there previously?
>
> Bastard. Beat me to it. :-)

I'm still chasing up that other thing. I had to postpone things a little
what with me buying nod's lathe, and personally subsidising the entire
state budget with some recent traffic/driving 'donations'


--
John McKenzie

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[Ext User(John McKenzie)]

rmjjj wrote:
>
> Long gone old boy,though I still have 1 OHG X2 converter and lots of
> resprung B2's.By the way, both the twin 425's and the the twin 450
> OHG's way outperform the 510/480 GRA system. The GRA system is nice for
> idle and lower midrange, but hopeless for top end. It seems that there
> isnt a decent converter than handles 400 hp plus. What engine/ Hp are
> you running

predominantly hemi 6s at this point, mostly NA, though one turbo if I
get around to it (I've actually got a driveline ready for it, and i
think at most I'll do one further 'bridge the gap' non torqueflite hemi
in the charger before I finish one with a t/f pattern, though I'll
probably end up talking a friend into running one on a 308. Do you have
any spare orange ohg springs (by themselves) that you want to get rid
of? And if not, just for shits n giggles, what would you want for one
with a convertor wrapped around it?


--
John McKenzie

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[rmjjj]

John, I have 4 more OHG X1's on order with spring kit ,due to the fact that its easier to buy complete converters than trying to get o/haul kits. Besides mine are modified for positive idle circuit.they are due in in a couple of weeks.
I do have a OHG X2 , which are only really good to 200 Hp but are the bees knees for the 4 cylinder crowd.