#126730, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 0 Jul-21-09 09:27 PM by 420agreenvilleSC
Originally posted by DJ420a Isn't the only way too tell is the piston tops? DOHC has 4 cut outs and the SOHC has 2 or 3?
that's one way. SOHC have no valve reliefs, the DOHC however, does.
don't know off hand the rest of the differences, but, here, this'll help: http://www.2gnt.com/?d=Neon_Engine? <- i'm not sure why the '?' is left off of the URL, but when you click on it, you'll notice that it's not there. Put it there, and the link will work.
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#126737, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 3 Jul-22-09 05:39 AM by teklein
If you use a SOHC bottom end, with our DOHC head your compression will be around 9.2ish IIRC.
Just like you can put DOHC pistons in a SOHC motor and net 10.2ish IIRC.
Other than that, they are pretty much the same. 2003+ SOHC Neon blocks use something called NGC, and the crank wont work with the way our PCM reads crank position.
Best best it to stay away from 2000+, unless you find a 2001-2002 Magnum SOHC bottom end. They have 9.8CR, which would net 9.4ish on the bottom end with our DOHC head. But, they come with a anti-friction coating from the factory.
Also, if you have a 95 SOHC Neon block, it has a different PCV system that vents directly from the crank case.
#126738, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 4
Originally posted by teklein 2003+ SOHC Neon blocks use something called NGC
Next gen Controller, iirc. It's a completely different trigger wheel, something akin to a 60-2, like the SRT-4.
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#126740, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 5
Originally posted by DarkOne
Originally posted by teklein 2003+ SOHC Neon blocks use something called NGC
Next gen Controller, iirc. It's a completely different trigger wheel, something akin to a 60-2, like the SRT-4.
Yep!
It also, from what I have read about it, keeps the A/Fs at a near perfect 14.7. However, I have also heard that it negates most of the gains made by bolt ons.
#126742, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 6
Originally posted by teklein
Originally posted by DarkOne
Originally posted by teklein 2003+ SOHC Neon blocks use something called NGC
Next gen Controller, iirc. It's a completely different trigger wheel, something akin to a 60-2, like the SRT-4.
Yep! It also, from what I have read about it, keeps the A/Fs at a near perfect 14.7. However, I have also heard that it negates most of the gains made by bolt ons.
Not surprising. It seems like every manufacturer nowdays is doing everything they can to prevent us from having fun.
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#126744, "RE: Diff between a complete DOHC and SOHC block?" In response to Reply # 8 Jul-22-09 10:16 PM by dalesmitsu
Originally posted by DJ420a So hate to repeat, but just too be clear, I could use a complete SOHC block as long as I stay away from 95's and 00+'s? Only downfall is lower compression.
Tek, said to stay away from the 2000's + unless you find a 01-02 Magnum Sohc bottom end.
95-96 you have to notch the block for the bearings.
