HydroDynamic Rock Crawler
04-22-2010, 09:56 PM
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HydroDynamic Rock Crawler I have completed construction of a full hydraulic rock crawler. After some testing it became apparent that an LS was needed for the powerplant. I currently have a LR4 #C51312155 that will be put into the buggy. I know I will need some help as I go along, so LS1TECH here we go.
Current plans include, but not limited to.
LR4 #C51312155 stock config.
Propane fuel, Impco 225 Mixer and Regulator
MSD 6LS Controller #6010, #8886
Edelbrock Performer RPM Manifold # 71187
GM truck radiator 1.25"x 28"x 18" core with electric fans
Dual alternators stock and 150 amp Delco
APECS 2000 electronic engine governor and 175 actuator
Buggy information can be seen at
http://www.pirate4x4.com/forum/showthread.php?t=763311
Current plans include, but not limited to.
LR4 #C51312155 stock config.
Propane fuel, Impco 225 Mixer and Regulator
MSD 6LS Controller #6010, #8886
Edelbrock Performer RPM Manifold # 71187
GM truck radiator 1.25"x 28"x 18" core with electric fans
Dual alternators stock and 150 amp Delco
APECS 2000 electronic engine governor and 175 actuator
Buggy information can be seen at
http://www.pirate4x4.com/forum/showthread.php?t=763311
Last edited by HydroDynamic; 05-15-2010 at 05:27 PM.
04-22-2010, 10:33 PM
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Pretty cool rig. So the air ride lifts and lowers the cab onto the suspension?? What does fully hydraulic mean? I thought hydros were only for heavy equipment and hoppers/lowriders.
04-22-2010, 10:41 PM
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Full hydraulic means that the engine connects directly to a pump that uses only the flow and pressure of the moving oil to drive individual wheel motors at each tire. The air ride is for the IFS and IRS and can change ride height at each tire for off road use.
Last edited by HydroDynamic; 05-15-2010 at 11:37 AM.
05-15-2010, 11:49 AM
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After some research on the boards I'm thinking the Edelbrock Performer RPM dual plane would be better for the rpm range that the engine would run through. The Impco 225 has an oval butterfly in the center. I will add an adapter plate between the intake and the Impco. Question is, should I try to split the flow right at the plate with a center wedge diverter or let it happen at the intake divert? I have read some people are cutting out the intake divert. How would that help?
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05-15-2010, 08:54 PM
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I just ran through the build thread on the other site. Incredible work! I was wondering why you would want to run a carb. This rig is obviously going to see some extreme angles wouldn't an EFI system work better?
Andrew
Andrew
05-16-2010, 01:05 PM
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It's a propane carb, not liek the type of carb you're thinking. A propane carb will run at any angle and can not flood.
My concern is that the IMPCO 225 carb, IMO, would drastically starve any LS series engine for both air and fuel. You should consider an IMPCO 425 or an OHG 450 or possibly even 2 of either of those. Or why not even keep the fuel injection?
J. J.
My concern is that the IMPCO 225 carb, IMO, would drastically starve any LS series engine for both air and fuel. You should consider an IMPCO 425 or an OHG 450 or possibly even 2 of either of those. Or why not even keep the fuel injection?
J. J.
05-16-2010, 01:14 PM
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It's a propane carb, not liek the type of carb you're thinking. A propane carb will run at any angle and can not flood.
My concern is that the IMPCO 225 carb, IMO, would drastically starve any LS series engine for both air and fuel. You should consider an IMPCO 425 or an OHG 450 or possibly even 2 of either of those. Or why not even keep the fuel injection?
J. J.
My concern is that the IMPCO 225 carb, IMO, would drastically starve any LS series engine for both air and fuel. You should consider an IMPCO 425 or an OHG 450 or possibly even 2 of either of those. Or why not even keep the fuel injection?
J. J.
Andrew
05-17-2010, 01:43 PM
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The 225 should be enough considering the sub 4000 rpm range. The impco spreadsheet says that the size and rpm are within spec for the 225. The 4.8 is about 280hp and 290 ftlb. It might not be enough but the governor actuator is set up for the 225. If it's not enough then I can change it out later once it's up and running. I need to check but the evaperator regulator might be the limiting part. I might need to run two of them.
Last edited by HydroDynamic; 05-17-2010 at 05:33 PM.
05-19-2010, 02:04 PM
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A call to Cary at GotPropane confirmed that the evaporator was big enough but the Impco 225 was borderline. Patooyee called it. Cary is sending a Impco 425 with upgraded silicon internals. The throttle body or plate is going to be made, as the governor needs a ball bearing friction free shaft and blade for best response and control. The plan is to use the stock ls blade and shaft and bearings and put them into a plate.
08-29-2011, 09:41 PM
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Update
Currently running 425 Impco Mixer with Holley throttle plate. Had a cam sensor failure that drove me crazy for too long. Runs great now.
Currently running 425 Impco Mixer with Holley throttle plate. Had a cam sensor failure that drove me crazy for too long. Runs great now.
