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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

View Poll Results: DOHC/OHC vs. OHV
DOHC/OHC 14 27.45%
OHV 37 72.55%
Voters: 51. You may not vote on this poll

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Old 06-14-2008, 09:42 AM   #1
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DOHC/OHC vs. OHV

which one would you like 4 the camaro v8(or maybe it's future gen V)? 4 me, the DOHC/OHC.
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Old 06-14-2008, 10:21 AM   #2
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"For".

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Old 06-14-2008, 12:00 PM   #3
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I don't care which config it has. I really don't. GM's proven time and again that you don't need OHC/DOHC to have a world-class engine...

So as long as it does it's job well, I couldn't give a rat's behind what configuration they use.
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Old 06-14-2008, 12:35 PM   #4
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I don't care which config it has. I really don't. GM's proven time and again that you don't need OHC/DOHC to have a world-class engine...

So as long as it does it's job well, I couldn't give a rat's behind what configuration they use.
Ditto, performance is far more important to me than configuration!!
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Old 06-15-2008, 04:28 PM   #5
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After working with current Mustangs, I dont want a Camaro to get a OHC/DOHC. Ive had enough of it. Its more expensive and time consuming to do mods. Not to mention aftermarket is slower. Thats the main attraction I have with LS engines, besides the superior power numbers.

Most old school wrench jockeys can do a cam swap on a LS anywhere, but with SOHC or DOHC most of them guys dont even want to help even with a case of beer. With Mustangs the only option you have is third party port work or hope Ford comes out with a better design soon. With LS engines or most OHV engines; you have a hand full of aftermarket companies producing head.

OHC is great if the car is going to stay stock or get nothing more than bolt-ons and supercharger. But I miss having a car that can be brand new and still be tinkered on and even your friend have fun helping. Maybe I am biased and have been scarred by Mustangs.
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Old 06-15-2008, 08:54 PM   #6
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doesn't OHV engines usually have more torque than DOHC/OHC engines? OHV engines are also cheaper to make, so OHV.
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Old 06-15-2008, 09:19 PM   #7
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OHV

give me a pushrod motor anyday much easier and cheaper to work on.
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Old 06-15-2008, 10:02 PM   #8
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doesn't OHV engines usually have more torque than DOHC/OHC engines? OHV engines are also cheaper to make, so OHV.
yes, but thats because its easier to make more rpms with (d)ohc than ohv. so they tend to use that.

still, i'd rather have ohv, they are smaller, simplier and lighter
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Old 06-15-2008, 10:05 PM   #9
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I'll say OHC cause theyre genrally lighter and can produce higher engine speeds than that of OHV 's can. Not to mention better engine performance and even better design flexiblity.
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Old 06-15-2008, 10:18 PM   #10
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I'll say OHC cause theyre genrally lighter and can produce higher engine speeds than that of OHV 's can.
They are, and can? I've always been under the impression that it's the other way around.

OHV's are lighter due to only having one Cam, etc.
And OHC's can rev higher due to the reduction in valve-float, etc.

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Old 06-15-2008, 10:30 PM   #11
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Doesn't matter to me, personally. Then again, I'll be getting the V6 (not the V8) and the only modding I'll be doing will be a custom exhaust system.
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Old 06-15-2008, 10:30 PM   #12
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They are, and can? I've always been under the impression that it's the other way around.

OHV's are lighter due to only having one Cam, etc.
And OHC's can rev higher due to the reduction in valve-float, etc.

You are correct. OHV are lighter due to less material overall. Just to get an idea I wish everyone would get the chance to see an LS# vehicle next to a Cobra with both hoods popped. That 4.6L DOHC will make an LS1 look tiny even though the LS1 would have over an liter of displacement over the cobra. OHV are simple and Gm uses it to there advantage. I hate hearing the arguement about the OHV being outdated. Its BS. The OHC design dates back about just as far. If GM can produce an engine with larger displacement, manage high 20s in gas mileage, and make mind bending power and potential; then I say dont **** with it.
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Old 06-15-2008, 10:47 PM   #13
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dont know last time i check OHC have better engine speeds.
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Old 06-16-2008, 01:40 AM   #14
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dont know last time i check OHC have better engine speeds.
Each one has there pros and cons. Packaging is going to be an issue with a DOHC with larger displacement. So a small displacement with DOHC will prolly be chosen to do the same as an larger displacement with OHV. I think the engine bay is about the same size as the last gen camaro, so try to imagine a 6.2 with DOHC,.....it would be ****ing huge.

Plus, the ability for high engine speeds is great if if you need to spin the hell out of it to get the needed power. Thats not needed when you got an engine that makes its power in low and mid range and the displacement to spare do it in.

Perfect example of high revving to get bigger numbers from DOHC:

Lexus IS-F: 415hp @ 6600; 371tq @ 5200 (5.0L DOHC with DI)
BMW M3: 414hp @ 8300; 295tq @ 3900 (4.0L DOHC with DI)
Ferrari F430: 483 hp @ 8500; 343tq @ 5250 (4.3 DOHC)

These are all wonderful engines, but I like an affordable car too. If high revving is what you want, its going to take more than just heads. Its going to take an bottom end that handle the speeds to take advantage of that feature.

As for me I like low and mid range power from GM's current OHV offerings and at a price I cant argue with. Even if GM manage to squeeze a 6.2 DOHC into the engine bay and make 500+ hp; I dont think anyone in this decade or the next half decade will drive away with a under 40k Camaro.

Saleen managed to pull off 390hp with 5.0L SOHC. Ford made the Cobra R with 385 hp from a 5.4L DOHC. Hell I contemplated the idea of building a 5.4 based Ford Modular for my Mustang, but after some research it wouldnt be worth the money even with the best parts chosen for the build. I hate to say it, but I wouldnt bet on GM to build a larger displacement engine (6.0L +) with DOHC with power optimized in regular production cars anyway. Not because they cant, but because they have more cost effective ways to make the power (they are looking at forced induction, LSA, LS9). Not to mention the fact gas mileage is good on current OHV engines. So why change?

If it isnt broke, dont fix it.

If we are talking V6 and I4s then by all means use DOHC. Because I dont think we will ever see a 4.5L bastard OHV V6 in a Camaro, nor do I want to. Lol.
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Old 06-16-2008, 09:35 AM   #15
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Give me pushrods and I'll be happy. Actually, I don't really care either way, I just know they are simpler and it's been proven they are not "lower technology." Hmm... 427 ci and 7000 redline?... Hell, a lot of cam only LS1 guys run to 7000 grand on a stock shortblock and heads. Of course they change the springs, retainers, pushrods and timing chain but still. You don't need need four cams to make power.
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Old 06-16-2008, 12:40 PM   #16
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I'll say OHC cause theyre genrally lighter and can produce higher engine speeds than that of OHV 's can. Not to mention better engine performance and even better design flexiblity.
Last time I checked, the Nascar OHV engines were turning 9500+ rpm, how many more rpms do you need? Are they purpose built engines? Sure they are, but no more so than a high revving Ferrari DOHC engine.
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Old 06-16-2008, 04:19 PM   #17
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Last time I checked, the Nascar OHV engines were turning 9500+ rpm, how many more rpms do you need? Are they purpose built engines? Sure they are, but no more so than a high revving Ferrari DOHC engine.
Clyde
And the last time I checked, F1 race engines run about twice that. If you could get a Nascar engine to do that, they'd need restrictor plates at martinsville.

Also, could the person who says that ohc engines are lighter please explain? I have never heard of that being the case. I always hear its the other way around.
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Old 06-16-2008, 04:31 PM   #18
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DOHC...
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Old 06-16-2008, 06:24 PM   #19
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And the last time I checked, F1 race engines run about twice that. If you could get a Nascar engine to do that, they'd need restrictor plates at martinsville.

Also, could the person who says that ohc engines are lighter please explain? I have never heard of that being the case. I always hear its the other way around.
And the last time YOU ran an 18,000 rpm engine on the street was?? I'll let you guys finish arguing it out, quite frankly I find the direction it's going in to be ridiculous.
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Old 06-16-2008, 06:38 PM   #20
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And the last time YOU ran an 18,000 rpm engine on the street was?? I'll let you guys finish arguing it out, quite frankly I find the direction it's going in to be ridiculous.
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Wha-?

C'mon! It's the infamous DOHC vs OHV debate firing up here.
It sits in the company of such debates like SS v Z28!!
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Old 06-16-2008, 06:40 PM   #21
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Y spin the engine faster, with a small displacement, to produce the same amount of power with a larger displacement engine at lower RPMS? you have to spin the engine faster on a DOHC to get the same power out of it. . .
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Old 06-16-2008, 06:47 PM   #22
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And the last time YOU ran an 18,000 rpm engine on the street was?? I'll let you guys finish arguing it out, quite frankly I find the direction it's going in to be ridiculous.
Clyde
It only started getting ridiculous when you brought purpose built race motors into the equation. Not what this thread is about.
Oh, OHV is my choice.
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Old 06-16-2008, 06:50 PM   #23
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you have to spin the engine faster on a DOHC to get the same power out of it. . .
Just some numbers for consideration:

2002 Camaro LS1: 310hp@5200rpm / 340tq@4000rpm
Mustang mod 4.6L: 300hp@5750rpm / 320tq@4500rpm
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Old 06-16-2008, 07:18 PM   #24
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I hate hearing the argument about the OHV being outdated. Its BS. The OHC design dates back about just as far. If GM can produce an engine with larger displacement, manage high 20s in gas mileage, and make mind bending power and potential; then I say dont **** with it.
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Old 06-16-2008, 08:12 PM   #25
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Awww come on... a topic isn't truly reached the end until someone makes a comparsion to Nazis.
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