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08-14-2007, 07:30 PM
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#26
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11 Second Club
Join Date: Jan 2005
Location: Fishkill, NY
Posts: 1,278
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Pushrods in big motors, OHC in little motors. I think the OHC engines get the nod for high RPM use but pushrod engines make a better powerband. Basically for something like drag racing I think the pushrod engine has a big edge because they make so much low end power, but for some kind of all out wide open racing I think the efficiency of the OHC engines is going to take the cake.
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Last edited by Batman; 08-14-2007 at 07:31 PM.
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08-15-2007, 08:01 AM
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#27
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Quote:
Originally Posted by cbrrmike
GM does build a OHC V8...its called a Northstar.
The supercharged 4.4 motor makes 470hp.
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Yah, but it's a half~hearted attempt. Not that it isn't a good motor, but compare that to an LS1 with the same SC and how much power would it make, or compared to something like a HP import engine or Motorcycle. 1400CCs and almost 200HP. GM didn't really take full advantage of the OHC on the Northstar.
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08-15-2007, 11:07 AM
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#28
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Join Date: Jul 2004
Location: West Long Branch
Posts: 13,598
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Quote:
Originally Posted by Pampered-Z
Yah, but it's a half~hearted attempt. Not that it isn't a good motor, but compare that to an LS1 with the same SC and how much power would it make, or compared to something like a HP import engine or Motorcycle. 1400CCs and almost 200HP. GM didn't really take full advantage of the OHC on the Northstar.
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MB's 5.4 supercharged engine makes the same power with 1.0 more liter. Not saying it was a sad engine, its a monster, but the Northstar is somewhat still relivent considering its a 15 year old design....
The new Ultra V8 should bring the GM OHC V8's up to spec with the new BMW and MB V8's.
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08-15-2007, 11:41 AM
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#29
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Quote:
Originally Posted by BigAls87Z28
but the Northstar is somewhat still relivent considering its a 15 year old design....
The new Ultra V8 should bring the GM OHC V8's up to spec with the new BMW and MB V8's.
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Point well taken, I forgot how long it's been around.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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08-15-2007, 07:19 PM
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#30
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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An extra overhead cam definetley makes a bigger difference in those little 4 bangers than in the big V8s
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