Search found 1198 matches

by franz
Fri Oct 07, 2005 9:13 pm
Forum: Want to Sell Parts
Topic: LPG parts for sale
Replies: 9
Views: 6884

LPG parts for sale

I have been in this industry in various capacities since 1968 and ran several conversion shops. I once had to purchase the inventory of one former bankrupt employer in exchange for past due salary, I chose to accept in inventory. As such, I am liquidating the rest of my propane equipment, mostly Imp...
by franz
Wed Oct 05, 2005 11:26 am
Forum: Your Project
Topic: IMPROVING THE EFFICIENCY OF FUEL INJECTION SYSTEMS.
Replies: 10
Views: 7086

Oops!

Hang on guys, before you start talking about 100% efficiency can someone tell me how you plan on eliminating internal engine friction? What temperature is your radiator? How cold are your exhaust manifolds? What comes out of the exhaust? If fuel is burned, it produces heat. This requires energy whic...
by franz
Wed Oct 05, 2005 11:11 am
Forum: Your Car
Topic: My Propane-fuelled Cars
Replies: 11
Views: 9665

My Mustang

I am long term resto-modding my 66 Mustang coupe and it may go a year between any real driving, but in the meantime, I need to move it around the shop. The gasoline system has dried out and causing some problems, but all I needed to do was start the engine and let it idle, so, a spare Holley 4bbl ba...
by franz
Wed Oct 05, 2005 8:55 am
Forum: Propane Forum
Topic: Converting a Chev 400 sb
Replies: 12
Views: 3717

CFM

For years and years, I used a raw number of 1.68 cubic feet of air per horsepower and it has always worked out. Regardless of the size of engine, or efficiency, or number of cylinders, or turbo/non turbo, you need air to make horsepower. The throttle controls the airflow, not fuel flow. Fuel is alwa...
by franz
Wed Oct 05, 2005 8:48 am
Forum: Propane Forum
Topic: building new motor
Replies: 6
Views: 2355

Technocarb

Dont overlook the Technocarb unit, it solves a lot of problems with hood clearance, plumbing, and actually has quite a bit of tunability. I would try one in a heartbeat! I have used other Technocarb products and am pleased with their performance. Although Impco holds a lions share percentage of the ...
by franz
Wed Oct 05, 2005 8:45 am
Forum: Propane Forum
Topic: problems with turbo and lpg
Replies: 30
Views: 10640

VPV

Its a Vacuum Power Valve, and it pulls raw fuel into the air stream based on vacuum signals. It receives vacuum from both the intake manifold and air-valve vacuum ports. If air-valve vacuum is greater than intake manifold vacuum, it allows fuel to flow under the mixer body. The VPV is tunable with o...
by franz
Tue Oct 04, 2005 6:31 pm
Forum: Propane Forum
Topic: Proper Tanks
Replies: 14
Views: 4489

tank reply

The tanks will be connected in parallel, with a check valve between the tank. Sherwood Valve makes one, called the "Check Tee" and comes with a bulkhead and hydrostatic pressure relief function. Only tanks certified for motorfuel use (ASME) are legal for vehicle use in the US. Only take fuel out of ...
by franz
Tue Oct 04, 2005 6:26 pm
Forum: Propane Forum
Topic: problems with turbo and lpg
Replies: 30
Views: 10640

one thought

It looks like the hose is correctly placed but I think there is an adapter place on the top of the mixer. Make sure there are no air leaks from missing or torn gaskets, no metal to metal joints. If there is a VPV, remove it. Remove the model E top cover and inspect the diaphragm for damage (it must ...
by franz
Sat Oct 01, 2005 4:15 pm
Forum: Propane Forum
Topic: Experience/info about Chevy truck kit from "Got Propane
Replies: 6
Views: 2590

got propane question

That is the X-450 system pioneered by the former Impco guru's, now made by M&M and Woodward under their own names, but almost interchangable components. Note: It appears that the Chevy system does not include any support electronics which would make it illegal for installation on vehicles originally...
by franz
Wed Sep 28, 2005 8:59 am
Forum: Propane Forum
Topic: problems with turbo and lpg
Replies: 30
Views: 10640

reply about link

I saw the engine but the area I need to see is not shown. Do a personal mail to me (its been corrected now) and attach a photo showing the hose connections and I will see what I can do.
BTW, this particular question has been relatively common, it will be interesting to see what develops.
Franz
by franz
Thu Apr 21, 2005 1:31 pm
Forum: Propane Forum
Topic: Turbo?
Replies: 5
Views: 2556

The 425 and 425 will be borderline at 375 bhp blowthrough, but will probably work. Your problem will be setting up the system for transparent operation. The transition from no boost to full boost can be pretty exciting, having driven more than a few high boosted systems. I have several of both, but ...
by franz
Wed Oct 13, 2004 12:46 pm
Forum: Propane Forum
Topic: Gas valves for Impco 425 Mixers
Replies: 3
Views: 4166

425 gas valves

There are indeed 3 gas valves (actually 4, one is very extinct). One is set up for most engines at stoichiometry, one is calibrated at about 10% rich for computer controlled feedback, and the other for lean cruise. It doesnt matter which engine is used, since by description, an engine is essentially...
by franz
Thu Oct 07, 2004 8:04 pm
Forum: Propane Forum
Topic: Turbo-propane
Replies: 5
Views: 4850

lpg valiant

In Florida, you might try and locate a company called "Motorfuelers". At one time, they were one of the biggies on the east coast. Also, see if you can locate Keith Thompson in Jacksonville; he owns a dyno tune up shop and was deep connected with some of the larger propane companies and conversion s...