Engine build complete

[hogster]

Although my 347 has yet to breath fire, the build is completed.
Although I am biased I think the twin Impco setup looks pretty good.



All good bits in it and 11:1 compression should work nicely with the AFR heads.

Should be putting in the drive train in the next two weeks, then its down the list

Pedals, electrics, gas tank, dash, seats ......go cart driving

regards
Hogster

[boxhead]

Yep I have to agree, it sure does look good.

[hogster]

And its the right kind

[Aussie Mike]

Ally heads, plenty of comp and probably a cam with good exhaust lift and duration and that thing is going to fly on gas.

Your twin mixer setup looks the business. I was contemplating doing that on a tunnel ram with twin mixers for the Cleveland in my old F100. I figured the long straight runners in the tunnel ram would work well with gas and I could pull lots of cold air in through a hole in the bonnet.

Cheers

[hogster]

A tunnel ram would be great. I even looked at supercharging, but I think the ultimate gas system is liquid injection, which is not yet domestically available. The advantage is the cold gas temperature as it changes from liquid to gas creating the ultimate cold air induction.

I had a few issues with fitting the impcos to an edelbrock manifold, which dont fit holley. Then you get the adapter plates and they fit, but the gas lines run in front to back, which doesn't work with the spacing and distributor etc......so more adapter plates......but I am happy with the result.

The cam is not too aggressive but I was trying to find the happy medium between power and drivability. The engine builder "Eddie" tells me that even though it isn't a big block, it will have dillusions of grandeur and be plenty for the cobra. In standard trim with a stock 302 windsor (1140kgs)

[alffie]

Theres a mob in Melbourne that do liquid injection for LPG

[richardferguson]

Gotta love the 347!
Mine's now 2 years old with 14000km on it and running very well.
What cam did you use Hogster?
Richard

[LoBelly]

that's a very nice looking engine and like Richard says gotta love the 347.

have just started to drive mine and the extra grunt is great.

I suspect with that setup you'll have plenty of fun.

Keep us updated

LoBelly

[Philm]

Hogster,
That is what a real engine is supposed to look like.

There is nothing sweeter than a stroked small block windsor.


Phil

[hogster]

Richard,

Used a Comp Cams Magnum Hydraulic Roller

Part 31-442-8

Duration 284/284, Lift .533/.533
For 2500-6000 RPM

This is what I was told would go hard enough, but not shake the gauges out at idle.

[alffie]

Hi Hogster
Just been to EDs, I see your engine is in, the exhaust is going to be a very tight fit, have you got it made up yet?

[rickmoss]

One quick question -- I don't know if it's a simple question or not...

Street legal in Victoria?

[alffie]

Dont know. The NT will allow any engine if it runs only LPG

[Wazza]

Originally Posted by Philm

Hogster,
That is what a real engine is supposed to look like.

There is nothing sweeter than a stroked small block windsor.


Phil

NOW ya talkin' Phil.....




Regards,

Warren.

[rickmoss]

Don't want to start a flame war here -- but, how does running LPG affect mileage, performance, etc?

Most of the taxis here in Singapore run LPG and they have less than amazing pickup and accelerations. On the other hand -- they're normal Toyota and Hyundai sedans.

How would you compare the Windsor engine above, running LPG to say an LS1 running petrol?

[Aussie Mike]

If you build the engine to suit LPG you will probably get no real loss in power. In fact in some cases you may even gain power. LPG has less BTUs than petrol but it has a much higher octane rating. This means the fuel itself doesn't have as much energy but the higher octane rating lets you run a lot more compression without detonation.

The newer LPG injection systems have some extra advantages. Liquid LPG injected into the port turns to gas and gives a big temperature drop to the incoming charge making it denser. It's often observed on gas injected engines that they get an increase in torque over the same petrol setup.

That being said it's difficult to compare setups between windsor and LS1 in a discussion like this. There are so many variables in how each engine could be built. What I will say though is that either motor running on petrol or LPG will make more power than you know what to do with in a light weight Cobra.

Cheers

[rickmoss]

When the time came to pick my engine for my plane -- the staggering number of choices was made a "bit" easier by keeping in mind that the engine had to meet the mission. Some people fly for aerobatics, some are speed freaks, others are all about economy.

My particular mission was long cross-country. Single flights of 2,000kms or longer at a stretch.

When my Cobra is finished -- I would like to occasionally take it to a track, but the primary mission is long, long rides alone with my thoughts and the scenery.

Given that design goal -- does it simplify my choice of powerplant. Or, does it complicate it?

[Aussie Mike]

Any of the above will do the job nicely. With the right choice of cam and gearing you will have a drive train that will be a great all rounder.

The LSX series engines make awesome power completely stock. With a T56 6 speed and the right gearing you will have a stout track performer with great open road manners. The LS motors usually get great economy too becuause of the lean cruise mode the ECU goe into on the open road. That combined with the T56 0.5:1 overdrive will see the motor loping along at 1500RPM and probably returning better than 10L per 100KM.

Cheers

[rickmoss]

Wow -- my wife's hamster-powered Peugeot gets about 10L/100Kms. I'd be afraid to tell anyone I was getting that kind of economy -- they might think I've gone "green"

[alffie]

most V8s will get that sort of mileage sitting on the highway on a 110 in top gear. Your cobra will easily get 10L/100 on the highway CRUISING. push them hard and it will be more like 25L/100.
If you build any engine to run only LPG and you will find they will more than likely make more power. Like mike said the LPG has less BTU so you will use more but LPG is half the price of ULP. The only problem will be where you can fit the tank. Talk to Vic Roads and see if they will let you run a windsor on LPG.