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Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Hi. Which of these heads would be better for low rpm torque? I want to get some more compression for my propane powered truck. It rarely sees over 3500 rpms. Its a 92 350 car engine I have a ramjet roller cam in it, shorty headers, holley tbi intake, 3" single exhaust. It hauls a camper around ect.
Hi. Which of these heads would be better for low rpm torque? I want to get some more compression for my propane powered truck. It rarely sees over 3500 rpms. Its a 92 350 car engine I have a ramjet roller cam in it, shorty headers, holley tbi intake, 3" single exhaust. It hauls a camper around ect.
Cool thanks. Should be alot easier to find some 187s.
They flow a little better on the exhaust side, should help get the heat from the propane out of the head. Also while the propane really does not need the added intake swirl, I really don't think it would hurt.
I would definately trim the end off, but don't just grind the ramp out, you will hit water. There is a ridge the cutter left from installing the valve seat that should be ground down. Also it wouldn't hurt to cut the seat for a 1.94" valve and use a good multi angle seat cut. A 5 angle radiused seat should help contact and help get the heat out of the valve. Do some research in the propane head setup as building and setting up a head for gaseous fuels is a bit different than gasoline.
Ok now what about these 059 heads? Would they be a better choice than the 187s? This thing is off idle up mostly. low to midrange. I am thinking of a jy turbo job maybie off a 5.9 cumins or 6.5 chevy.
Ok now what about these 059 heads? Would they be a better choice than the 187s? This thing is off idle up mostly. low to midrange. I am thinking of a jy turbo job maybie off a 5.9 cumins or 6.5 chevy.
059s flow GREAT and have a nice chamber. Should make great off-idle and midrange power on a 350.
Oh. I forgot to mention its a manual. So it really is "off-idle". 5th gear 1500 rpms frequenly.
You might look into the GM Gaseous fuel vortec engine camshaft part number. Not sure which cam it is, but GM claims GREAT low-midrange torque out of it.
Ok, the i got a set of 187 heads off a 1990 truck. Looks like they were rebuilt at some point they have the guide liners in them and look pretty good considering. Looking through the intake port it looks like i should grind the corner off the swirl ramp. Bad idea? Any insight on the intake ports being siamesed like that?
06-30-2014, 10:08 AM
