Build me a GM Gasser tow motor for 5k?
02-21-2017, 03:28 PM
#23
Whats unreliable about a 408? Legitimately speaking, have you seen anyone stranded because of the 408 itself, vs some of the bullshit they performed on the motor, or hack job wiring?
Constant decline in compression because of skirt wear, I can see. Catastrophic, leave you on the road waiting for a tow truck? Havent seen that, as a result of the 408 itself.
Not to mention, he himself suggested the 408. I suggested a roots blown 6.0, which can make gobs of power on low boost, at low rpm with the proper cam choice. Nothing screamer about that.
02-21-2017, 03:45 PM
#24
I'd say do your compression/leak down test, replace the valve seals if needed, swap out the valve springs and rockers(higher ratio), headers, replace the cats(either with new ones or remove them), install an aftermarket intake tube but leave the stock box and filter assembly(anything else will just dust your engine since your in AZ and the stock filter and box are rated for like 500hp and the micron rating is MUCH better for your engine than any of the cotton or foam filters), do a tune up, if you don't have one already you'll want to install an electric fan or swap it out with a higher CFM fan or a dual fan, possibly underdrive pulleys with an overdrive alt pulley, and the tune it. might want to consider installing an auxiliary trans fluid cooler as well.
the only time I've ever heard of people using a 408 is in HHP applications. Such as race cars, mud trucks, and the like.
02-22-2017, 09:01 AM
#26
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Whats unreliable about a 408? Legitimately speaking, have you seen anyone stranded because of the 408 itself, vs some of the bullshit they performed on the motor, or hack job wiring?
Constant decline in compression because of skirt wear, I can see. Catastrophic, leave you on the road waiting for a tow truck? Havent seen that, as a result of the 408 itself.
Not to mention, he himself suggested the 408. I suggested a roots blown 6.0, which can make gobs of power on low boost, at low rpm with the proper cam choice. Nothing screamer about that.
Constant decline in compression because of skirt wear, I can see. Catastrophic, leave you on the road waiting for a tow truck? Havent seen that, as a result of the 408 itself.
Not to mention, he himself suggested the 408. I suggested a roots blown 6.0, which can make gobs of power on low boost, at low rpm with the proper cam choice. Nothing screamer about that.
I dont hate the super charger idea either. Trying to figure out a realistic cost on a CTS-V takeoff.
Last edited by BlackSSaz; 02-22-2017 at 09:36 AM.
02-22-2017, 09:29 AM
#27
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kinda have a point. we got off track.
I'd say do your compression/leak down test, replace the valve seals if needed, swap out the valve springs and rockers(higher ratio), headers, replace the cats(either with new ones or remove them), install an aftermarket intake tube but leave the stock box and filter assembly(anything else will just dust your engine since your in AZ and the stock filter and box are rated for like 500hp and the micron rating is MUCH better for your engine than any of the cotton or foam filters), do a tune up, if you don't have one already you'll want to install an electric fan or swap it out with a higher CFM fan or a dual fan, possibly underdrive pulleys with an overdrive alt pulley, and the tune it. might want to consider installing an auxiliary trans fluid cooler as well.
the only time I've ever heard of people using a 408 is in HHP applications. Such as race cars, mud trucks, and the like.
I'd say do your compression/leak down test, replace the valve seals if needed, swap out the valve springs and rockers(higher ratio), headers, replace the cats(either with new ones or remove them), install an aftermarket intake tube but leave the stock box and filter assembly(anything else will just dust your engine since your in AZ and the stock filter and box are rated for like 500hp and the micron rating is MUCH better for your engine than any of the cotton or foam filters), do a tune up, if you don't have one already you'll want to install an electric fan or swap it out with a higher CFM fan or a dual fan, possibly underdrive pulleys with an overdrive alt pulley, and the tune it. might want to consider installing an auxiliary trans fluid cooler as well.
the only time I've ever heard of people using a 408 is in HHP applications. Such as race cars, mud trucks, and the like.
On your fan point - last time I looked into it, the impression I got was nobody was using e-fans for towing as they simply couldn't cool as well. Is this (still) wrong?
My first real trip with this rig was towing my boat to san diego in September. It was about 112* out, and it over-heated 1/2 way up the jacumba grade. Replaced the fan clutch after that and haven't had any cooling issues since.
