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Cheaper to run 10s in civic than a mustang!


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I'll never forget an argument I had with a twit on Supraforums about his claim that OHC and quad cam motors always made less torque. He seemed to feel there was something magic about 2 more valves that killed torque and that GM would never put this on their V8s

 

ZR1 had variable opening intake runners, too much intake runner = low end torque loss. FWIW Lotus designed it for 'em.

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As I understand it, the Northstar motors are a smaller config. Not sure. I keep hearing these rumors of the quad cam for the Vette. 10 years ago with the ZR1, it was expensive, but supposedly it is not so. And, if I remember correctly, the Caddy V16 (the one the new V8 is supposedly based off of) was a well packaged motor. I'm going to check right now for those articles.

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Here's one: http://www.motortrend.com/future/spied/112_0304_c6/index1.html

 

Then again, I read this:http://autoweek.com/cat_content.mv?port_code=autoweek&cat_code=carnews&loc_code=&content_code=09501022

 

and then I found this:http://www.autoweek.com/cat_content.mv?port_code=autoweek&cat_code=coverstory&loc_code=index&content_code=00790378

 

There still may be hope for a quad cam 4 valve per cylinder V8 from GM as the XLR (think that's the name) could have one. You never know.

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Yeah the ZR1 engines were about 25k in crate form, same power as an LS1 and sooooo much more, LS1s are more than I'd want to spend already :shock: They have come down alot, maybe the average price for a ZR1 engine is around 13k or so, see a few now and again on eBay. Heavier, bulkier, more expensive to work with, hmm give me something else :) It was a great engine 10 years ago, but I think thats the key, 10 years ago.

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Guest Your Car is Slow

Eh....the LT5 is still a very potent engine. I believe the ZR1 still holds quite a few speed/accelleration records.

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I'd take one. Sure it's heavier and the LS1 makes that power now but I believe there's LOTS of potential left in it. It's just so darned expensive for parts and whatnot :( I've spoken to a couple of ZR1 owners who are looking into modifying them, sick power! Forced induction makes them shine...

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  • 2 weeks later...

C6 corvette top model is supposed to have 500 hp, when i heard about it GM was already at ~450 and going for more, that was in december. I heard that at a talk on the history of the corvette, given by Joe Speilman (i think). Bob Lutz (gm product czar) said the same thing a few weeks later when he gave his talk.

 

Oh, and if you're looking at a GTO, wait a year, theyre gonna come out with a model that has 405hp. (This from Lutz also).

 

And on the topic of direct acting valves, gm has a system that works. The only problem is that it takes more power than the engine produces (or uses more power than the difference makes). That i learned because I was talking about engine technology with a friend who has been working at GM research.

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