sohc vs dohc

[rolnaldo33]

i have a dohc 98 neon rt, but what is the real difference between sohc, and dohc?

[03cavyTT]

DOHC give you more power

[pegasus757]

I use to street race back in the day and out of all the trixs the most important was to let the car breath. let me explain .....lets say you and i were to run a foot race but we both had to breath out of differant tubes. im 250 lbs and get to breath in and out of a paper towel roll, your a lean mean screamin 150 lbs runningback who has to breath out of a straw, i will win every time! the less restiction the greater the hp

[Scatch!]

The SOHC has better low-end power, while the DOHC has better high-end power and more potential.

However, the SOHC is arguably more reliable, and the Magnum (SOHC) has erased any power advantage the DOHC ever had in stock configurations.

[blachdohcneon]

the real differance is one cam. joking

about 18hp diff, the sohc also takes better to bolt ons. I have owned both, the dohc is much faster.

[fattyblunt]

http://www.datsuns.com/Tech/ohv_vs_ohc.htm

[neonracer98]

SOHC is great for low end but DOHC has great Top end.

Both can be made to perform great just that the SOHC needs a tad more work.
Just get a DOHC tranny for your SOHC

[fattyblunt]

Originally Posted by neonracer98

SOHC is great for low end but DOHC has great Top end.

Perhaps you should reread the article I posted. Specifically this part:
"In layman's terms, a DOHC 4-valve/cylinder (or even 5v/cyl) increases HP without sacrificing low RPM torque and driveability."

[neonracer98]

Originally Posted by fattyblunt

Perhaps you should reread the article I posted. Specifically this part:
"In layman's terms, a DOHC 4-valve/cylinder (or even 5v/cyl) increases HP without sacrificing low RPM torque and driveability."

Perhaps you should drive a SOHC neon and DOHC neon then you will see what I mean. I own a SOHC the low end feels better then a DOHC... Don't be those kind of people that talk out of there ass

[Scatch!]

Originally Posted by fattyblunt

Perhaps you should reread the article I posted. Specifically this part:
"In layman's terms, a DOHC 4-valve/cylinder (or even 5v/cyl) increases HP without sacrificing low RPM torque and driveability."

Yes, compared to a OHV engine. The "problem" with a DOHC without an active intake is it breathes very well, too well for lower RPM, which causes a loss of low-end torque. You can alleviate the problem by choking down the intake tract to increase intake velocity, but that kills the upper range and defeats the purpose of using DOHC. You can stick an active intake on it, which gives the best of both worlds. This is what DC did on the Magnum (SOHC).

[fattyblunt]

Originally Posted by neonracer98

Perhaps you should drive a SOHC neon and DOHC neon then you will see what I mean. I own a SOHC the low end feels better then a DOHC... Don't be those kind of people that talk out of there ass

Haven't done it with a neon but I have with a civic. Low end was about equal but the DOHC pulled away rather quickly once VTEC kicked in. Both were 96-99 models, a 97 EX w/ a D16 & a 99 Si w. a B16A. Sorry I was going by personal experience & not basing it on neons specifically, and found physical evidence to support my findings. No reason to be rude, we're all here b/c we love cars, and I am relatively new to neons, having owned 2 hondas.

[Scatch!]

You're comparing two completely different engines to each other, which isn't fair. As you no doubt know, VTEC was developed to make up for the DOHC's relative lack of low-end with two different cam profiles that work better in different RPM ranges.

We're all just car people here, so let's all be cool, OK?

[rolnaldo33]

yeah, that makes sence, its harder for me to peel in my dohc, but my friend has the exact same car but a sohc, and he can go nuts, so the low end torqe thing, yeah that sounds right

[Boost Owns]

the single overhead cam has a larger duration cam than the cams in the dohc, hence-alot of sohc cam neons are used fo autox, they have quicker pick up at lower speeds