SOHC neon head on 89 2.5 cb

[ourturbovan]

I have seen the DOHC head used. Could the SOHC 2.0 16 valve head be used as easily?

[contraption22]

There are a couple people working on it. But I can't imagine making much more power with a SOHC neon head than you would with a 8 valve head.

[Boost_virgin]

I thought the whole point of the 16v was better flow not a SOHC vs DOHC. How does the # of cams effect power output? Please explane, because I am new and trying to learn. Just look at the # of post I have!

[slprT1]

The reason for more output with DOHC is because there are 4 valves per cylinder. 2 intake and 2 exhaust. One cam controls 1 intake and 1 exhaust valve and the other cam controls the other intake and exhaust valve. This makes the engine breath better allowing for more power to be made. That is my take on it anyway. Someone please correct me if I am wrong.


D~

[Garret]

I'd imagine the "only" reason to due a SOHC swap is to have the intake manifold up front....

[OmniGuy123]

Quote:

Originally Posted by Garret I'd imagine the "only" reason to due a SOHC swap is to have the intake manifold up front....

I would agree.

Also, I too cant see the cross flow design neting enough diveneds to make the investment worth it.

[dodge80_89]

Quote:

Originally Posted by slprT1 The reason for more output with DOHC is because there are 4 valves per cylinder. 2 intake and 2 exhaust. One cam controls 1 intake and 1 exhaust valve and the other cam controls the other intake and exhaust valve. This makes the engine breath better allowing for more power to be made. That is my take on it anyway. Someone please correct me if I am wrong. D~

You were almost correct, the DOHC has 2 cams with 4 valves per cylinder, BUT each cam doesn't run one of each valve like you explained. There is an intake cam that runs the intake valves and an exhaust cam that runs the exhaust valves.

SOHC heads I would think flow better then our 8v heads, at least a little bit being they are still 16v but not sure on that.

[slprT1]

I thought it might be that way after I posted, but figure someone would correct me if I was wrong. Thanks for clarifying.

D~

[shelbyplaya]

Head type Intake Exhaust Lift
Lotus 16V 244 cfm 182 cfm 350"
Maserati 16V 237 cfm 213 cfm 350"
Neon DOHC 237 cfm 195 cfm 350"
Swirl SOHC 156 cfm 135 cfm 500"
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couldent find the flow rates of the 95 SOHC 16v heads, but i'm sure they are getting as high as the DOHC 16v heads.... just cuz you have less cams dosent mean you cant flow as much

[Garret]

Ray you're out to lunch on this one, the SOHC neon head doesn't flow as much as the DOHC one period, it's only slightly better than an 8v head, like I said the only advantage would be to have the intake manifold in the front

[Boost_virgin]

Okay guys the SOHC head on a neon is 16v. Not 8v. In neons the SOHC makes more tq down low. I think this has more to do with cam profile than anything eles. But both heads are 16v, so is there anything to be gained for the DOHC?

[Garret]

The neon SOHC heaad still flows considerably less in stock form than an 8v and if you're going to get port work done and you are going to swap a head you might as well get a DOHC heaad

[Khajjathefang]

the 2.0 2.4 dohc head is cheap and plentiful, there is no reason to do all the work of conversion for an INFERIOR design

[The Pope]

Quote:

Originally Posted by slprT1 The reason for more output with DOHC is because there are 4 valves per cylinder. 2 intake and 2 exhaust. One cam controls 1 intake and 1 exhaust valve and the other cam controls the other intake and exhaust valve. This makes the engine breath better allowing for more power to be made. That is my take on it anyway. Someone please correct me if I am wrong. D~

one cam for all intake and one cam for all exhaust valves on a DOHC. A SOHC 16v Neon head has big rocker arms and one cam works all 16 valves. The DOHC head has better flowing ports and you can adjust overlap and just the intake or just the exhaust cam timing. So more adjustible

[glhsdrew]

isn;t the intake and exaust on the same side as the dohc from the sohc