Anyone in NJ have a 350/290 or 350/265?

[Cuse99]

Other than that, they're just fine as long as you've got realistic expectations.

That's the ticket. I'm not sure what to expect to be honest. Even if my current motor is 150Hp and this 350/290 only hits 220 hp, that's still significant I would expect. If I can find someone nearby with one of these motors I'd be able to see for myself.

 

[Cuse99]

If there is a drawback, it's the flat tappet cam, so you'll need a bottle of additive with each oil change. Other than that, they're just fine as long as you've got realistic expectations. There's a reason GM has sold millions of them.

What do you meanly additive? I'm not using an additive now. What's does this flat tappet cam need that oil doesn't have?

 

[pagrunt]

What do you meanly additive? I'm not using an additive now. What's does this flat tappet cam need that oil doesn't have?

Zinc-ZDDP additive. Modern engines with roller tappets don't need it so 99% of the oil don't have it.

 

[ELCAM]

ZDDP a zinc additive the was removed from oil because it damages catalytic converters. It protected the flat tappet cams from wear. Everything is roller cams now because the removal of ZDDP from engine oil.

 

[08Malibu]

ZDDP a zinc additive the was removed from oil because it damages catalytic converters. It protected the flat tappet cams from wear. Everything is roller cams now because the removal of ZDDP from engine oil.

This is precisely why I recommended the vortec engine. Would suck to flatten a new cam

 

[Clone TIE Pilot]

Other big issue is that most of the good lifter companies either went under or stopped making flat tappets, leading to over seas sources and their well known quality issues.

 

[olds307 and 403]

This is precisely why I recommended the vortec engine. Would suck to flatten a new cam

Yes, not only a flat cam but good bye bearings and oil pressure. I went from very good oil pressure to very poor when my cam went flat. The cam bits have to go somewhere. Going roller for precisely this reason, it sucks. Good thing it was a $120 motor. The 290 hp has a pretty aggressive flat tappet cam.

 

[Streetbu]

The 290 hp has a pretty aggressive flat tappet cam.

You're joking right? I sure hope so. That cam is the opposite of aggressive.

 

[scoti]

What do you meanly additive? I'm not using an additive now. What's does this flat tappet cam need that oil doesn't have?

All you need is an oil that's intended for older vehicles. I use Joe Gibbs 'DRIVEN' oil. They call it 'racing oil' but whatever. I have it in my dually (BBC w/flat tappet hyd cam) & used it in the car (SBC w/flat tappet hyd cam). I don't remember but it may not be CAT-converter friendly though. We use Rotella T4 on the Model-A's.

 

[olds307 and 403]

You're joking right? I sure hope so. That cam is the opposite of aggressive.

Not really, 222/222 duration is far from smogger stock, a lot for 8 to 1 compression. I would think they throw on stiffer valve springs with that cam. I would not run SP oil. I had a 214/214 cam go flat FYI.