zoomstrange

I gOT a tecknocarB OnN mi 355 STROKA ad its runnig reache (11:1 at 3000) til Fiv 5000 (rebs - cross this out) revs wen der air/fueal mixre goees tue 17:1 - so its tooo leeen unda lode.

wot is wrong withh it? wee trid diffrnt ventiures ad it mad a litle bit off difrence - see mi furst questen calld "GAS LINE PRESSURE DROPS - WHY".

Buga the technocab now. Sowhat GRA flows les? At leas ta peeple sellen it nows how it wurks. Awl techcarb flogger knws is just wat a grat bloke he is An how hes bin doon this 4 35 yeers and he rekons retch or leeen dusnt mata - did tell ya how gud IAM?

ENY BRANY IDES WOODBE GUD!

zoomstrange

Gee, Mr Strange. It looks like you have an interesting problem - I have seen your outline under the "Gas line pressure drops - why?" heading and am currently ringing a very good friend who really knows what he is talking about to give you a hand. I thought the Technocarb was supposed to be the Bee's Knees - but here it is giving trouble and the brains trust are out to lunch.

WB5LTR

what the **** is this guy on about,

must be an alter ego or something

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mac151

Between 8.02 and 8.06 you copped a fair knock on the back of your head, didn't ya...


You seem better for it

greenhj

gas leak causing oxygen deprivation perhaps?

That might explain the pressure drop too.

Hope this helps!!

WB5LTR

unless grenny that this gas line pressure drops why mumbo jumbo has something to do with the fact that he has the line plumbed up his arse. Pressure loss into a large void...... hmmmm

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Crunchy_NuT

i know im barking up some trees here - but mate, do you drive a ford? that would explain a few things to me if you did

zoomstrange

Thanks for the interest. $500 later, Problem appears to be not enough converters and too much hot air from the Farmer who sold the Technocarb and reckons his athsmatic setup flows enough for a big block when it just doesn't flow enough for 360 cubic inches.
Lucky I had the old MGA on the shelf and it'll go on with a microswitch at half throttle.
For those of you more interested in developing V8 cars than flaming people having a go, just be aware that as it stands, you are very likely to be buying Technocarb from someone who sees no difference in setting up a Technocarb with a full engine spec including cam sheet and head flow sheet, weight of car, trans, diff, - the full bugle - and a forklift. The original venturis sent out were wrong - they are time consuming to fit (lesson; send the carb back for resizing), the converter runs out of puff at 3 grand on a fairly mild holden stroker - and the technical response was "11:1 to 17:1's not bad - why did you tell the customer it's running lean at the top end, he won't spend much time there anyway"
Yeah, I probably won't be redlining the car on the way to work, and if the inflated flow rate of Gas Research is THEIR only real fault, there's not much difference, is there? Which puts us back to spending aussie dollars here in Australia and provoking GRA to do some more "Research" into their, admittedly uglier, system.

I'm sending the $500 invoice to Technocarb and standing by for more flaming wit here.

evl1308

you need to get to the point mate, if you have some sort of problem with a member of this site maybe it would be more prudent to pm him instead of wasting our time reading your crap.

zoomstrange

There it is, Ladies and Gentlemen. Criticise Technocarb here and the thought police swagger over and form a queue to give you Testosterone poisoning. The POINT is - neither Technocarb nor Gas Research are perfect out of the box, but as it stands, Technocarb is sold as a single converter, tailored-to-your-spec deal, and as such, doesn't do what it says on the tin.
Anyone NOT wanting to blow hundreds of dollars on tuning advice they hadn't budgeted for on a V8 gas conversion - and hundreds more on a second converter they were told they wouldn't need WILL want to know this. I've passed on the $500 invoice to Technocarb Australia and perhaps they will be a bit more realistic in future. Discussing and avoiding expensive pitfalls is THE POINT of this forum, particularly when it has seen perhaps more than it's fair share of Gas Research AUSTRALIA bashing. I'm here to enjoy and contribute to these "grunt files" - not swat off grunt flies - so let's keep it positive, eh? Seeing as I'm parting with probably over a grand more than anyone else (?) on getting a Technocarb to sing on an Aussie V8, its probably a good idea to share what happens.

Dirtcowboy

Just curious how many convertors were you running just the one? I m really interested to see why your system seems to be strangling your motor where in other cases this system works fine?

Im not for one system or the other and am considering which way I want to go with it but what exactly did your system entail and do you have picture of the system inplace?

NG&M

Here Here. Let the person have his or her say!
How about sharing your experience in a positive way by giving us some more specific details on your system, before and after, what you found to work, and what did not.
Photos would be great.

zoomstrange

Thanks for the interest! My initial setup was an MRA/ Newgen on the original red 308/rochester, whereas I've now gone straight gas after running in with the rochester on a VN headed stroker with a Waggot cam ground for the new gas engine so there's no real comparison between the old and the new other than to say the car was noticeably punchier when we put aside the rochester (on BP Ultimate only) and went straight gas, even though it turned out to be running rich at 11:1.
The Technocarb is sold as a single ("modified" airod) converter plus the throttlebody, which has 4 changeable venturies; they look a bit like a pretty squarebore 4 barrel, I suppose. On the dyno it runs (now) ok until it is put under load at 3000 rpm, where the air-fuel ratio leans right out to 17:1 and stays that way until 5000 rpm. The tuner's initial guess was that it needed a second converter, but the Australian Technocarb distributor insisted it was all hunky dory - cue more fruitless dyno time trying to find a different answer. What we did find early on was that the wrong venturies were fitted - which is annoying as the sales pitch is that you send Technocarb your car's specs and they tailor the whole thing to suit: I chucked in a cam sheet and head flow chart as well, and they still stuffed it up.
The Gas Research twin throttlebody setup, which is the comparable offering comes with two converters, presumably because they worked out that one will run out of puff when you put it to work. My tuning guru agrees with the general criticism of Gas Research you'll see in AussieV8, that they don't flow as much as the makers say; and the fine tuning is done on the dyno at your extra expense - but at least you know that when you decide to buy the system. As luck would have it, my original MGA converter needs a new kit through it - and they are unavailable, so it's a new MGA to help the airod, perhaps next week and it will be set up to come on only under load using a microswitch on the throttle linkages: Then it's back to Neville, his dyno and my crumpled wallet to see where we go next.
What didn't work: 1) Taking Technocarb's advice. Get a reputable tuner who works for YOU. As nice as the Distributor may be, and he'll tell you he's been "doing this for 35 years", when push came to shove, he's a fitter, not a tuner and he ran out of answers almost immediately when the tuner rang him about the air-fuel ratio. In fact he complained that the tuner shouldn't have told me there was a problem. 2) fitting the venturies; send the carb back and get Technocarb to change them; couriers are cheaper than mechanics - and Technocarb remain responsible for getting it right.
Photos - alright, I try, but it's no show car!
Thanks again for the interest.

soon2havHZ

hey bud you need to get onto 400onlpg he has the technocarb setup and swares by it, , maybe send him a message ask for some advice he's a bit of a guru. all the best with it, by the way if your really keen to go back to your GRA setup i'll by the technocarb in a flash! sorry to hear of all your trouble
where are you getting your car dynoed here in Adelaide?

zoomstrange

Thanks Soon, yeah, I thought 400 would have taken an interest, I'll work out how to send him a note. I've never had GRA - actually I was put off it by what I read here, which is a bit disappointing in the end because I haven't supported the Aussie option. Here I'm getting the tuning done by Neville Smith at Specialty Tuning in Marion. GRA raved about his ability to get their gear to sing, and after a couple more similar out of the blue recommendations, he's turned out solid.
If I was going to sell this setup now I'll lose more - I'm going to make it work. But if I had my time again, I'd have a good look at converting a Holley squarebore to straight gas - Rob over at Adelaide Autogas Services was going to sell me one he'd done but changed his mind and encouraged me to go the Technocarb because he didn't have the time to knock up another Holley conversion. It didn't seem all that hard to do the Holley thing for someone closer to some pretty basic machining tools than me...