Thread: seeking advice on blown 392
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01-18-2006 02:42 PM #1
seeking advice on blown 392
I.m building my blown 392
Now it's time to order the last parts.
The 6-71 that I have will give me @ 5 %
overdrive 11 PSI
I have M/T rods . ARP mains and head studs.
Engine will run on propane ( High octane fuel )
Maby I will start with gasius propane but want to go LPI.
What is best for this engine?
Go for other pully to get around 14 PSI
And what compresion ratio pistons are than adviced.
Or stay with the ( A bit low ) 11 PSI
What is than the max compresion I can use .
Am thinking of O ringing the block ( Good ot bad )
I'm not sure if I want to go 4 bold main.
Trans will be updated to a 4L80
Car is heavy 5600 LBS
Tailor is around 6000 LBS
Thanks for the advice
Remco
The Netherlands
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01-18-2006 03:58 PM #2
propane
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01-18-2006 04:17 PM #3
Originally posted by gassersrule_196
propane
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01-18-2006 04:46 PM #4
Contact these guys and ask them.....
http://www.blowerdriveservice.com/techcharts.php
This is a chart showing the boost you can run with a given c.r., but I don't know about propane. I think it is the equivalent of 104 octane fuel. If that's the case, you could probably run quite a lot of boost, but I would be concerned about the motor spitting the head gaskets out if you don't o-ring it.PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.
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01-18-2006 05:30 PM #5
And propane is a very dry gas, so you would want to make sure that you have hardened valve seats."aerodynamics are for people who cant build engines"
Enzo Ferrari
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01-18-2006 05:45 PM #6
Originally posted by techinspector1
Contact these guys and ask them.....
http://www.blowerdriveservice.com/techcharts.php
This is a chart showing the boost you can run with a given c.r., but I don't know about propane. I think it is the equivalent of 104 octane fuel. If that's the case, you could probably run quite a lot of boost, but I would be concerned about the motor spitting the head gaskets out if you don't o-ring it.
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01-19-2006 05:06 AM #7
Hi Thanks for the replys.
Hardend valve seats I have
I Use propane becouse of the cost .
Here in the netherlands It's cheaper to run a car on propane instead of gas.
propane = about 60 $cent a litre
Premium gas about 1 $ 60 cents
But what is the best street setup
Relative high compresion with only a little ( 11 ) psi boost.
or low compresion ( around 8-1 )
with high boost.
Thanks again Remco
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance