johns3524
Well-known member
Hi there guys, I am new here as you can determine. I've been a lurker for a couple years or so while building a DD powered by the infamous 300-6. My signature bears it's credentials and I built it myself. I was around when "Corsa" 150's and then 180's were around, and built a few DD's while working on a restored "65 180 had to be sold due to "life" and financial issues that were involved. (It died hard though, I towed it to Alaska along with all of the matching serial numbered correct parts, and it was drive-able with a 2-carb 110 at the time.)
Any-who, I get turbos, and I get why "blow-thru" carb'ed at lower pressures (up to 10 or so) may be the best choice for me to shoot for given the following parameters.:
stock crank, rods, cam (with a Cloyes metal set),.060 over block, (pistons are at this point up for discussion, although I like H519p hypers.)
This will be the block. Whether I will turbo or not It will be with me for a while as stated.
Heads: I can use a 90" EFI, or an 86, or 79 carb'ed head.
So, if I use an EFI head (which I prefer), what about using say (2) head-gaskets, lowering the pressure to allow for a safe (fairly experimental) head pressure to allow for up to 10 psi? (If I don't turbo it, I can remove 1 gasket and continue to use the block as a viable carb'ed naturally aspirated block).
This will all be going thru a CARB. I can use an Autolite or Holley, AND If Holley, I MAY be using a leaning device newly discovered that will allow me to adjust a HOLLEY carb from Idle cutoff-100% rich. (adjusted in-cab via a vernier mixture control). (managed by EGT input)
I believe I will use EFI exhaust manifolds, fabbing up a stainless turbo-mount-supporting style header pipe. Using a turbo solves many problems allowing for use of a cummins-style 3" out-flange, making the exhaust install very manageable. I WILL incorporate and EGT manual gauge style overall temp monitoring situation either pre-turbo or post...of course we CAN add an inter-cooler, and no doubt, WILL in time, allowing for higher limits of boost.
This is a long post and thank you for our patience.
May I say, that overall insane POWER is not my main objective. I hope to achieve a -low-boost, air-supplemented type of install suing a carb, and manual adjust-ability using an EGT to monitor overall health of the motor..(basically pistons) of course as testing proceeds, with satisfactory results, I CAN dial in more boost.
I GET how to do the carb hat install, and have the necessary tools and info to seal up the carb...
any "don't do it" input?...I have three engines or so available for testing..I WILL be shooting for low rpm spooling and the ability to "work" this 300-6 to a better potential under 2500-3000 rpm..so turbo choice is also a part of that equation, I get that..open to suggestions there.
On Edit I forgot to mention that I WILL use a DSII ignition probably initially, and am able to modify my own spark curve if need be. I am familiar with catch-can's for for breathing assistance, although at the RPM's I plan to operate at I don't see it as a potential problem.
Any-who, I get turbos, and I get why "blow-thru" carb'ed at lower pressures (up to 10 or so) may be the best choice for me to shoot for given the following parameters.:
stock crank, rods, cam (with a Cloyes metal set),.060 over block, (pistons are at this point up for discussion, although I like H519p hypers.)
This will be the block. Whether I will turbo or not It will be with me for a while as stated.
Heads: I can use a 90" EFI, or an 86, or 79 carb'ed head.
So, if I use an EFI head (which I prefer), what about using say (2) head-gaskets, lowering the pressure to allow for a safe (fairly experimental) head pressure to allow for up to 10 psi? (If I don't turbo it, I can remove 1 gasket and continue to use the block as a viable carb'ed naturally aspirated block).
This will all be going thru a CARB. I can use an Autolite or Holley, AND If Holley, I MAY be using a leaning device newly discovered that will allow me to adjust a HOLLEY carb from Idle cutoff-100% rich. (adjusted in-cab via a vernier mixture control). (managed by EGT input)
I believe I will use EFI exhaust manifolds, fabbing up a stainless turbo-mount-supporting style header pipe. Using a turbo solves many problems allowing for use of a cummins-style 3" out-flange, making the exhaust install very manageable. I WILL incorporate and EGT manual gauge style overall temp monitoring situation either pre-turbo or post...of course we CAN add an inter-cooler, and no doubt, WILL in time, allowing for higher limits of boost.
This is a long post and thank you for our patience.
May I say, that overall insane POWER is not my main objective. I hope to achieve a -low-boost, air-supplemented type of install suing a carb, and manual adjust-ability using an EGT to monitor overall health of the motor..(basically pistons) of course as testing proceeds, with satisfactory results, I CAN dial in more boost.
I GET how to do the carb hat install, and have the necessary tools and info to seal up the carb...
any "don't do it" input?...I have three engines or so available for testing..I WILL be shooting for low rpm spooling and the ability to "work" this 300-6 to a better potential under 2500-3000 rpm..so turbo choice is also a part of that equation, I get that..open to suggestions there.
On Edit I forgot to mention that I WILL use a DSII ignition probably initially, and am able to modify my own spark curve if need be. I am familiar with catch-can's for for breathing assistance, although at the RPM's I plan to operate at I don't see it as a potential problem.