Let's talk v8

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Old Oct 6, 2009 | 10:25 AM
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Old Oct 6, 2009 | 10:45 AM
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Originally Posted by Chris111
The only pushrod motors that are overhauled that often are straight out nhra top fuel and rail cars.

I'm going to guess that you really don't know a lot about the lsx motors by what you have been saying. If you look into any of the cars in nhra that are lsx powered run entire seasons on one build, some run even longer. I'm not saying that they have to be overhauled either (new season, new motor). Of course I'm talking about motors that make 800+ horsepower for the record.

F1 motors aren't even in the same league. They are a different style motor and are built for longevity not a pass down the strip. They have no stroke and have to rev to reach their powerband.

Last but not least....you have to be kidding if you're honestly saying that the 4.6 is a better motor than the lsx series motors. Any company could have "overbuilt" a motor from a factory. I hate how people always use this as "it's a better motor" argument. The lsx out flows, performs, and revs.
Those are not the only classes that get rebuilt that often are you forgetting Pro Stock. There are plenty of 1UZ's in NHRA that compete with LSX and do just as good. I know enough about LSX ENGINES to know that it's not gods gift to the V8 world. Yeah and Chevy/Ford/Nissan/Toyota/etc can do 800+ forever if built correctly so why would LS1/X be any different then Nissan/Toyota? Im well aware how F1 engines are built, short stroke, lack of tq, but make more power, you don't need 800 ftpns of tq in a 1200 pnd car. Once again I didn't say it out preformed an LS/anything I was using it as an example of how much lift a OHC engine could accommodate, jesus read.

You guys are stuck in Chevy world, any of you ever even thought about coming out of your domestic box and just LOOKING or doing any kind of research on Nissan/Toyota V8's or OHC designs? I doubt it. What do you know about 1UZ/2UZ/VH/VK to argue. And FYI that drag soarer I posted runs stock ported heads supporting over 1300whp so I think they got potential.

This has turned into a LS1 Vs Everything argument, and I didn't want that but of course everyone thinks im bashing LS, LS engines are the best EVAR, blah blah blah. Im not im comparing OHV to OHC READ.

And PoorBoyBrian im not even go to respond to that cause you just make yourself look retarded.
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Old Oct 6, 2009 | 10:57 AM
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Originally Posted by Epstein
Also, someone talk about area under the curve limitations on pushrod motors. I want to say that I've read you have to have really shallow ramp angles to keep the pushrods happy, thus requiring the huge lifts/durations and high flow rates to actually get a decent amount of air into the motor. Might be talking out my ass here, though.
In order to acheive peak flow in an OHV you have to have alot more lift because of 2V heads having more shrouding. With a 4V head because the smaller diameter of the valves and the fact that they take up more of the combustion chamber they have less shrouding, in terms resulting in not needing to achieve a shit load of lift and less stress on valve springs.
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Old Oct 6, 2009 | 10:58 AM
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Originally Posted by Chris111
F1 motors aren't even in the same league. They are a different style motor and are built for longevity not a pass down the strip. They have no stroke and have to rev to reach their powerband.
Maybe I'm not getting your point, but how is a motor that can rev to 21,000 RPM's (limited to less, but have been proven to rev that high functionally) and last for multiple races under the types of G forces it is subjected to be of lesser significance??
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Old Oct 6, 2009 | 03:40 PM
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You missed what I was saying on the f1 motors.

Let me start off by saying I am NOT a lsx lover or biased towards any motor. I do like the lsx series though.

Who cares what the motors will do stock because we aren't talking about stock motors at all here. I'm not going the strip to compete in these types of events with stock heads, are you?

I wasn't throwing the 800+ number out there to say that others can't do it. I was saying that this is the average power level in most of the builds we are talking about. Any of these motors can do this of course.
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Old Oct 6, 2009 | 03:46 PM
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Another thing.....why are these being compared with power adders? If we discuss na vs na it's a done issue. The 4.6 is weak sauce in this debate, not to mention the cost to modify the mod motors.
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Old Oct 6, 2009 | 04:33 PM
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Originally Posted by Chris111
You missed what I was saying on the f1 motors.

Let me start off by saying I am NOT a lsx lover or biased towards any motor. I do like the lsx series though.

Who cares what the motors will do stock because we aren't talking about stock motors at all here. I'm not going the strip to compete in these types of events with stock heads, are you?

I wasn't throwing the 800+ number out there to say that others can't do it. I was saying that this is the average power level in most of the builds we are talking about. Any of these motors can do this of course.
No, im not, honestly I REALLY hate drag racing, I prefer road racing/auto-x. But the example was the capability of these heads. Thats what I said.

Originally Posted by Chris111
Another thing.....why are these being compared with power adders? If we discuss na vs na it's a done issue. The 4.6 is weak sauce in this debate, not to mention the cost to modify the mod motors.
Once again I don't do Ford's and I never said anything about power adders. I said the Cobra engine would be able to accommodate just as much lift as an OHV engine. Also I said I have HEARD/RUMORED bottom ends are capable of over 800hp, correct me if I'm wrong.
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Old Oct 6, 2009 | 04:47 PM
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I was under the impression that you were comparing the mod motor to the lsx series.

I like road/autocross over drag myself as well.

The part about power adders was towards motors making 800+. these are not na motors, well the gas motors anyway.
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Old Oct 6, 2009 | 06:52 PM
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Originally Posted by Chris111
Like I said before, the pushrod design is just fine. It's been reliable for years. Hondas are some of the most reliable motors built and we still see engine failure with them as well.

The ls1 is a hands down great motor in the small block world.
I'll second that....
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Old Oct 6, 2009 | 11:03 PM
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It's sad that there so many other motors that people over look in the v8 world.
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