Author Topic: Gen II 426 hemi v. gen III  (Read 2160 times)

Offline ragtopdodge

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Re: Gen II 426 hemi v. gen III
« Reply #15 on: April 27, 2018 - 04:25:13 PM »
Gen II all the way.  However it must have dual-quad.  EFI or cab, must have two things up on top.

Gen III way too common and unless those valve covers are covered up, they're fugly as heck.

'70 318-auto Chally 'vert
'71 383-auto 'Cuda 'vert (sold)
06 300c SRT8
04 2500 QCLB 4x4 HO




Offline 70chall440

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Re: Gen II 426 hemi v. gen III
« Reply #16 on: April 27, 2018 - 04:35:15 PM »
Well I guess this one will be disappointing then bc I am going to run 1 EFI TB on it. I already have the intake and the AC for it.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Topcat

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Re: Gen II 426 hemi v. gen III
« Reply #17 on: April 29, 2018 - 08:30:27 PM »
If running a bigger than factory Cam using OEM or reproduction Hemi Valve Covers:

Spring PSI needs to be increased.

When you order aftermarket valve springs; The circumference of  the valve spring is slightly bigger.

The clearances are so close on OEM exhaust spring outer edge already to valve cover originally.

So what happens is the edge of  the new exhaust spring will begin slowly eating away on the  inside of the valve cover.

Only 2 fixes:

1.Stretch the inside of the valve cover for clearance. Which I ended up doing
2. Know this beforehand and get Bee hive exhaust valve springs.

Hopefully this tip will help you avoid a future headache I previously experienced.



« Last Edit: April 29, 2018 - 08:35:06 PM by Topcat »
Mike, Fremont, CA.


Offline 70chall440

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Re: Gen II 426 hemi v. gen III
« Reply #18 on: April 29, 2018 - 09:42:52 PM »
Thanks, I really appreciate the advice and information. I believe I have beehive springs but will have to check.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)