The Modular V-8 didn't get its name from its design. The name was derived from its manufacturing plant protocol--Modular--because the engine plant can be changed out in a matter of hours to produce different versions of this engine family.
tomustang said:
it's the cobra crank that's the foundation of repetative 7000+ rpms40oz said:That link seems to say that the rods in pre-03 Cobras are the same as those in the SOHC engines. Wouldn't this seem to imply that the stock SOHC short block is capable of supporting the same rpms levels as the DOHC Cobra engines? So you could safely turn 7000 rpms in a SOHC with an upgraded valvetrain? Am I missing something here?
Cobra's run a forged steel crank in comparison to a GT's Nodular Iron version.40oz said:That link seems to say that the rods in pre-03 Cobras are the same as those in the SOHC engines. Wouldn't this seem to imply that the stock SOHC short block is capable of supporting the same rpms levels as the DOHC Cobra engines? So you could safely turn 7000 rpms in a SOHC with an upgraded valvetrain? Am I missing something here?
TGJ said:You don't need the Cobra crank to turn repetitive 7000+RPM with a modular motor. There is plenty of high horse power cars running the cast 2V crank past 7000 RPMs without issues. In fact that was the crank KenB used with his N/A 2V car.
True, but how often do you see guys spinning up a SOHC to that extent either? I mean, the stock rev limiter kicks in at 6,250rpm and the stock cams stop making power long before that. Sure, I supose you could reprogram the EEC to bypass the factory rev limit, but for what purpose? You'd need a pretty agressive build in order to justify that kind of RPM anyway. I don't see a problem with a SOHC making the odd jaunt up to high RPM, but I wouldn't want to see repetative runs to 6,800-7,000rpm with one of them, like you do with a Cobra.40oz said:I hadn't seen a single post over the years about an SOHC tearing itself apart from high rpms. It always seems to be from running lean or trying to push way too much power on the stock long-block, or some sort of spring or valve failure due to install or manufacturing errors/defects.
Gearbanger 101 said:True, but how often do you see guys spinning up a SOHC to that extent either? I mean, the stock rev limiter kicks in at 6,250rpm and the stock cams stop making power long before that. Sure, I supose you could reprogram the EEC to bypass the factory rev limit, but for what purpose? You'd need a pretty agressive build in order to justify that kind of RPM anyway. I don't see a problem with a SOHC making the odd jaunt up to high RPM, but I wouldn't want to see repetative runs to 6,800-7,000rpm with one of them, like you do with a Cobra.
40oz said:See, that's what I thought. You see all these posts where people get all concerned about revving a stock short block past 6000 rpms, as if there is something about the pre-03 Cobras that is wildly different. If you actually look, it seems the crank and pistons are indeed different, but not in ways that would inherently limit the 99+ SOHC's rpm-wise to something much lower. Seems to me that the Cobras have a better crank and pistons, but I would think the rods are what's going to go when you rev an engine too far. And if the rods are the same, I'd think you could safely rev the SOHC at least as high as an N/A Cobra, assuming your valvetrain can make power up there.
That's why I was wondering what I was missing. I hadn't seen a single post over the years about an SOHC tearing itself apart from high rpms. It always seems to be from running lean or trying to push way too much power on the stock long-block, or some sort of spring or valve failure due to install or manufacturing errors/defects.
svttech76 said:well you would need to upgrade the valve train. the stock 2v head will valvefloat if you try to rev that high.
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