Search found 706 matches

by storm
Fri Sep 18, 2020 4:29 am
Forum: Propane Forum
Topic: propane on a 454 with a 6/71 some questions
Replies: 5
Views: 123

Re: propane on a 454 with a 6/71 some questions

remco wrote:
Thu Sep 17, 2020 7:06 pm
That gives me the question , dous it hurt a lot if I would take the trottle body,s a bit larger that wat is the minimum.
So 65 mm.
Sorry I don't understand what you are asking.
by storm
Tue Sep 15, 2020 3:53 am
Forum: Propane Forum
Topic: propane on a 454 with a 6/71 some questions
Replies: 5
Views: 123

Re: propane on a 454 with a 6/71 some questions

I took the flow from this website https://accufabracing.com/cfm-air-flow If I look at this chart I see that the stoch 5L mustang flows 495 I think that that is a 60 mm Trottle body than , but is seems a bit strange and realy small to me . You should have noticed that one manufacturers TB may not fl...
by storm
Mon Sep 14, 2020 4:26 am
Forum: Propane Forum
Topic: propane on a 454 with a 6/71 some questions
Replies: 5
Views: 123

Re: propane on a 454 with a 6/71 some questions

When I use this formula Replace the 14.7 with 15.6 for propane Than It tels me that I need about 1400CFM of flow [(DxR)/3456] x [(B/14.7)+1]=C You are using this formula incorrectly. Leave it alone as it is [(DxR)/3456] x [(B/14.7)+1]=C The 14.7 represents the weight of air not air fuel ratio. At s...
by storm
Sun Aug 02, 2020 3:40 pm
Forum: Propane Forum
Topic: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...
Replies: 14
Views: 580

Re: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...

Well that possibly complicates things a bit. I have read your threads on GearheadEFI and don't see anywhere if anyone asked you what transmission type you have. I'm assuming, considering the memcals you have been using, it's an automatic but it is an electronic or manual (meaning TV cable) automatic...
by storm
Sat Aug 01, 2020 3:19 pm
Forum: Propane Forum
Topic: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...
Replies: 14
Views: 580

Re: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...

https://i.imgur.com/GwsIEWr.png Things feel more peppy. It's definitely better. The AFR on startup and idle is still strange, it'll start at about 17, then very slowly goes all the way down 13:1 at idle when it's fully warmed up. I thought it was meant to behave the other way round? That table does...
by storm
Wed Jul 15, 2020 3:31 pm
Forum: Propane Forum
Topic: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...
Replies: 14
Views: 580

Re: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...

I don't know what the petrol quality is like in the UK but if it is at all lower than top quality I'd be running it a bit more than 1% of the time. TBI is bad enough on fresh petrol but when it is stale TBI plays up. We found that out here in Australia with the Global J car (we called it the Camira ...
by storm
Mon Jul 13, 2020 3:21 pm
Forum: Propane Forum
Topic: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...
Replies: 14
Views: 580

Re: Tuning a '92 Chevy G20 350 SBC TBI with LPG installed...

Some questions for you. 1. Do you intend to run dual fuel? In other words do you occasionally run petrol? 2. How have you got the 425 setup with the TBI system? some pictures would be helpful here. 3. How have you got the innovate setup? My suggestion would be to set it up to show Lambda values not ...
by storm
Mon Jun 29, 2020 5:46 am
Forum: Your Project
Topic: Australian L67 build
Replies: 9
Views: 3126

Re: Australian L67 build

I have just completed half of a top swap on my old engine. By half I mean the cylinder heads. I went to work a few weeks ago at a new school and on the way in my engine developed a problem and was running extremely rough. I babied it home in the afternoon where it promptly spat off the bottom radiat...
by storm
Sat Jun 20, 2020 4:01 pm
Forum: Propane Forum
Topic: Idles at 1250 RPM
Replies: 4
Views: 502

Re: Idles at 1250 RPM

The link should be to a YouTube video titled "Toyota 3TC turbo propane first start" posted on June 17. Should it? [youtube]https://studio.youtube.com/video/r0dni6K6NSI/edit/basic[/youtube] The link doesn't go anywhere and looking at the link address if I signed in as you I'd be taken to your YouTub...
by storm
Thu Jun 18, 2020 3:58 am
Forum: Propane Forum
Topic: Idles at 1250 RPM
Replies: 4
Views: 502

Re: Idles at 1250 RPM

The link you posted doesn't go anywhere except an error page.

C3H8 is spot on, spray a liberal amount of soapy water or brake cleaner at all gasket locations and listen to the engine. When it changes you have found a leak.
by storm
Sun Jun 07, 2020 12:47 am
Forum: Propane Forum
Topic: Propane fuel level gauges
Replies: 3
Views: 281

Re: Propane fuel level gauges

In Australia, and I assume most other countries, you can buy various propane gauge senders. Each sender works with different gauges depending on their ohms requirements. Common senders in Australia are listed here https://bluelpg.com.au/shop/electrical/ ... s-lpg-tank
by storm
Sat Apr 25, 2020 2:57 am
Forum: Propane Forum
Topic: 454 turbo impco 425 x2 tuning help
Replies: 20
Views: 1615

Re: 454 turbo impco 425 x2 tuning help

Stock heads, forged pistons balanced bottom end. Approx 8:5 compression ratio. Comp cam turbo/supercharger camshaft. Don't take this the wrong way but I'm done here, I can't help you with anything when the information you supply is less than basic. Let me give you an example of the type of reply I'...
by storm
Sat Apr 25, 2020 12:20 am
Forum: Propane Forum
Topic: 454 turbo impco 425 x2 tuning help
Replies: 20
Views: 1615

Re: 454 turbo impco 425 x2 tuning help

It's running a 2.78 rear gear ratio and a standard turbo 400 transmission and convertor. And you want 700RWHP? You'll blow it all apart unless things are beefed up. When I asked about the combination and then specifically asked about what parts the engine has I was referring to heads, compression, ...
by storm
Fri Apr 24, 2020 4:03 pm
Forum: Propane Forum
Topic: 454 turbo impco 425 x2 tuning help
Replies: 20
Views: 1615

Re: 454 turbo impco 425 x2 tuning help

If the turbo is spooling at 2400 rpm (200 rpm higher than before the change you just made which to me is a great leap sideways if not backwards) and the engine isn't responding to it until 4000 rpm I'd suggest the build parts combination could possibly be a problem. We know a little bit about the tu...
by storm
Sun Apr 19, 2020 11:30 pm
Forum: Propane Forum
Topic: 454 turbo impco 425 x2 tuning help
Replies: 20
Views: 1615

Re: 454 turbo impco 425 x2 tuning help

Please don't take this the wrong way but there is very little real information for me, or anyone, to be able to give accurate and helpful advice. Twin outlet definitely on to do list. Will see what my tuner says if he could do it You need a license to work on LPG systems and if your tuner isn't lice...