Search found 796 matches

by storm
Sat Feb 20, 2021 3:17 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Hi Marc Work out your budget and go from there, What can you realistically afford? Now ask yourself. Do you want a nice cruiser? Do you want a street racer? Do you want a race car? Each of these have a very different driving style. With regards to the idea of fitting an Impco 600 I'd be asking what ...
by storm
Fri Feb 19, 2021 9:42 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Blueprint have a pretty good reputation as far as I am aware.
by storm
Mon Feb 15, 2021 7:25 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Good to see you are moving along. Take plenty of photos and share your findings.
by storm
Thu Feb 11, 2021 5:12 am
Forum: Propane Forum
Topic: dedicated propane injection systems
Replies: 12
Views: 9797

Re: dedicated propane injection systems

Everytime I watch this I am amazed that the LPG vapour starts out at such a low ambient temp. Your anti-freeze is is not only being punished by the the weather but by the liquid LPG entering the regulator and leaving as a gas at a temp still lower than freezing as well. You're doing a good job my fr...
by storm
Thu Feb 11, 2021 5:06 am
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Off the top of my head I do not know the relevant oem specifications but you measure the centreline of the cam tunnel to the centreline of the crank tunnel and that will give you the distance. You then compare that distance to the oem specification. It is a fairly precise measurement, which things l...
by storm
Thu Feb 11, 2021 1:03 am
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

I think to add stain steel turnips in the baffle. If this is steel wool then yes that is a good idea. Something that makes the oil vapour collect and turn back into liquid form is a good thing. As said I measured wear on timing chain, and from what I hear it is still some wear... what would you do ...
by storm
Tue Feb 09, 2021 1:35 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

From your description of the vacuum readings I would say your compression rings are ok. Also if your car sits for so long you may actually find the residue you have seen is old petrol that has "gone off". It thickens, discolours, and looks like oil, I never let it sit in small engines (lawn mowers, ...
by storm
Mon Feb 08, 2021 7:14 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Timing chain wear is measured pin to pin over several pins, easy check is pick the chain up in the middle of the sprocket, a good chain won't lift far. You also have the opportunity to grab a multi keyed set to get whatever cam advance you chose. Timing chain wear can be measure on the engine exact...
by storm
Fri Feb 05, 2021 4:50 am
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

I have a bad PCV valve. I already noticed oil being sucked too much by this valves, and oil on the throttle blades when dismantling engine.... More likely you've got a pressurised crankcase from poor piston ring seal. Good thinking there @Tom68, I hadn't considered the short block not have been reb...
by storm
Thu Feb 04, 2021 1:55 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Marc wrote:
Thu Feb 04, 2021 7:07 am
or/and add an oil catch can on the hose return to the mixer.
This is a very good option combined with a working pcv.
by storm
Wed Feb 03, 2021 3:41 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Now I feel I may have done a mistake… Don't worry about it I asked because it always helps to keep the end goal in mind when we are doing modifications. Let's go through some theory. Petrol is a liquid fuel so a petrol carb will behave differently because we are always trying to keep the fuel in su...
by storm
Tue Feb 02, 2021 5:21 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

What are you wanting to achieve by doing this?
Marc wrote:
Tue Feb 02, 2021 5:27 am
Work progress - center plate removed - does it look Ok? Not exactly similar from both sides…
Playing with the grinding tools, I scratched the gasket surface somehow : I 'd think maybe I need now to use some silicone when using the mixer gasket…

Marc
by storm
Sun Jan 31, 2021 11:35 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Hi Marc I honestly don't know about the valve inserts/seats. The size differences, as far as I am aware, between the 2 valve sizes is 0.01". As long as there is enough material to seat the valve and have a visible boundary between the closed valve and the combustion chamber then I, personally, would...
by storm
Wed Jan 27, 2021 1:36 pm
Forum: Propane Forum
Topic: dedicated propane injection systems
Replies: 12
Views: 9797

Re: dedicated propane injection systems

@everyone I have followed this project on both FB and the MSextra forum, it has been interesting and shows what can be done with items that were never designed to be used together. This also shows that LPG injection is a viable way to keep older vehicles running and on the road.
by storm
Fri Jan 22, 2021 6:15 pm
Forum: Propane Forum
Topic: More Air Flow for a Model 425 on a 327 SBC
Replies: 66
Views: 26790

Re: More Air Flow for a Model 425 on a 327 SBC

Hi Marc

Here's a video that may give you some hints with your Vortec heads https://www.youtube.com/watch?v=j8Rbpn4KRjY