I think ModMax Racing may have been, but they do have refurbed Cobra cranks there, but want $900.
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$900 for a used Cobra crank is crazy, I don't care if they don't make them anymore,, They were only $600 new and Ford built 70-some thousand "SVT Cobra's" .
I would'nt pay more than $400 shipped for one.
I bought a mix of used parts, used Cobra crank, Manley SVT rods, new Diamond pistons/Total Seal rings from John Tymensky when he closed his Modular Performance shop ... Wow, that's been 6yrs ago.
The crankshaft/rods came out of a big turbo setup .. The crankshaft was good, the rods not so much, the big ends were serviceable, but the bushing ends were worn and needed honed 2thousands so I would've needed 8 new .869" wrist pins and honed the pistons to fit them, I decided to buy new Manley rods instead ...
I'm still running the crank and those rods .. they're on their 3rd build.
Run the TFS by PAC springs. It's $195 for a set and they use stock retainers and stem caps, coupled along with stock or a turbo cam under .550" lift and you've have a great valve train that can handle high rpm.
https://www.summitracing.com/parts/tfs-16213-24
Those springs are going to be too light for high boost/high rpm , you want the TFS-16125-24..
as for the guides, i thought the oem plastic ones were best? from my research the metal based ones have a tendency to stick creating all sort of issues? whereas the plastic guides dont need oil pressure to function?
On the sticking issue, it's the ratchet type iron tensioners that can stick open causing broken guides.
The tensioners do need oil pressure to keep the guides tight tight ..
The issue with the OE plastic tensioners is they have a tendency to blowout the seals, really not an issue, stick with the OE plastic ones.
my interest in the cobra rods mainly are/were is theyre in OEM component.
Honestly, the reason Ford used Manley for the SVT rods was they needed something stronger than the SVT team could make on fairly short notice, they are good rods but do have their limits ... They can fail when pushed too hard. This was caused by hydroloc from a leaky head gasket.
Weiscos can be a bit noisy? is that upon cold start? or as a generalization? any videos offhand to give me an idea? im also curious what it is about them that creates more noise?
The noise they're talking about is 'piston slap' ,, with a 2618 piston materal you have to run .002-.004" PTW [depending on how much boost you're running] to allow for piston growth as it warms up.
I've never heard any noise on my builds using a 2618 piston and PTW set at .0035".
Stock PTW hypereutectic piston is around .001".
the gt500 billet backing plate with tss gears? is is a lateral move in terms of longevity/reliability?
The purpose of the billet backing plate is to eliminate the back plate flex that Ford found out was letting oil pass out of the cast oil pump back plate on the GT500,
Jasper Engine has video showing how much oil leaks past the cast back plate ..
https://www.youtube.com/watch?v=6QPahVJJqFw
The billet OPG's are to prevent shattered gears, I ran a billet GT500 pump with cast gears for three years, I did install Boundary OPG's in that pump and using it in my current build.
Word of warning, If you take the plate off the oil pump .. Do Not Over Torque the bolts on the back plate when you reinstall em' ..
It's chintzy metal and you'll strip the threads realllllly easy, I used a drop of blue Loctite and torqued to 80in-lbs.
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