Information for a 2.0 engine swap - SOHC to DOHC - Page 2

Sturly · #11 08-12-2008, 11:21 AM

I have always heard that mod for mod it doesnt make that much difference at the track if you are using the dohc or the sohc if you build each one right! I would rather comb the junkyard for spare turbo bits than a dohc motor and fool around with all that myself!

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fsu182 · #12 08-13-2008, 03:54 AM

which is pointed out in the sticky. lol. 2.4 swaps ftw

although i think that could change ur class in certain events. in our auto-x they dont let you shift higher than third. so at 7500 rpm in my 3.94 my car is at about 96mph. so im glad im running a DOHC.

I_Ride_Neon · #13 08-14-2008, 12:49 AM

Cool. But I still need to know what gives the California car the lower compression. Then I can mix and match to get a even lower compression ratio thats ideal for boost.

fsu182 · #14 02-03-2009, 01:57 AM

cleaned up since the forums changed. srry zach i haven not been able to find that info for you. would be nice to know since im trying to turbo too

IceMan(Mopar_Freak) · #15 04-13-2009, 11:05 PM

in the bottem paragraph are you saying that if i get the camshafts out of a dohc 2.4 liter chrysler they have more torque versus a stock dohc 2.0 liter?

4. Is the 420a engine from an eclipse the same as the neon DOHC?
No, the Neon 2.0 DOHC (Engine code: ECC) and Avenger/Sebring/Eclipse/Talon2.0 DOHC (Engine code: 420a) are different. Similar, but different. In other words your neon does not have a 420a engine. This is a common misconception among new 1st gen DOHC owners. The 420a head is unique and has reversed flow; The exhaust manifold sits in front of the car and wraps down in front of, then under the engineblock.The air intake is routed behind the engine towards the rear of the compartment to enter the head. Many bottom end parts for a 420a will work for the ECC such as pistons, rods, timing components, bearings, head gasket, etc. Another common swap is for neon owners to use the valve cover from the 420a (which is has raised lettering that reads: "DOHC 2.0L 16 VALVE."

Also note that the neon DOHC (ECC) shares onlyits cylinder head in common with one other engine: the Chrysler 2.4 DOHC engine found in the 1st gen stratus, caravan, etc. They are the exact same casting number. If you look at the back of the cam gears on the ECC's head, they read "2.4 front." This is because the gears are flippedwhen used on the 2.4 DOHC. The camshafts, however, are different. The bottom endon the 2.4 is also different. It has a longer stroke and produces more torque. It is also popular to swap the 2.4 DOHC into 1st gen neons. In most cases you will find a 2.4 swap to be more worthwhile, but requiring more work and parts.

IceMan(Mopar_Freak) · #16 04-14-2009, 12:11 AM

would it be more likely to float a valve in the swap from a single to a dual over head cam because of the pistons being flat top

sabin420 · #17 04-14-2009, 11:19 PM

No. to "Float" a valve is when the valve springs can't return the Valve to it's closed position fast enough. This most commonly happens at high RPM's with fatigued valve springs.

willches1 · #18 04-22-2009, 03:09 PM

if your swapping a blown 2.0 for a newer one, can you just unbolt the transmission and jack the engine up? or do you have to take the tranny out too?

Altima_wb · #19 04-22-2009, 03:18 PM

i think it might actually be easier to take the whole assembly out... not sure if there is enough room....

sabin420 · #20 04-23-2009, 12:20 AM

If you don't mind doing the axels, taking it out w/ the tranny is easier. Otherwise, for an Automatic, you can just pull unbolt it from the tranny and pull it straight out.