1971 340 build

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1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:28 am

Started with a standard bore 1970 engine block: Decked, 0,30" overbore etc.



Scat rotating assy: forged crank, conn rods and flat top pistons


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:30 am

Arp main studs, factory windage tray, Melling oïl pump.



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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:32 am

IMN Engine Indy X head, 2,12" stainless intake valves, Beehive spring


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:35 am

Had problem with Crane 1,6 roller rocker....



cam is Hugues roller rocker

Camshaft Technical Details
Intake Valve Lift 1.5, .489".
Exhaust Valve Lift 1.5, .510"

Intake Valve Lift 1.6.520"
Exhaust Valve Lift 1.6 .544"

Intake Duration at .050" 214°
Exhaust Duration at .050" 218°

Lobe Separation Angle 110º
Intake Centerline 107º
Intake Opening at .050"
Exhaust Opening at .050" 0° BTC
42° BBC

Intake Closing at .050"
Exhaust Closing at .050" 34° ABC
-4° ATC

Min. Suggested Cylinder PSI 165

Sweet Spot RPM 1400 -5800


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:36 am

philcollins wrote:IMN Engine Indy X head, 2,12" stainless intake valves, Beehive spring, combustion chambers enlarged to 70cc, should have 10,0 - 1 compression ratio.


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:37 am

philcollins wrote:IMN Engine Indy X head, 2,12" stainless intake valves, Beehive spring, combustion chambers enlarged to 70cc, should have 10,0 - 1 compression ratio


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:40 am

...


Last edited by philcollins on Sun Feb 22, 2015 12:31 pm; edited 1 time in total

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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:40 am

...


Last edited by philcollins on Sun Feb 22, 2015 12:32 pm; edited 1 time in total

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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:41 am

...


Last edited by philcollins on Sun Feb 22, 2015 12:33 pm; edited 1 time in total

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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 11:42 am

Had problem with Crane 1,6 roller rockers

philcollins wrote:
philcollins wrote:IMN Engine Indy X head, 2,12" stainless intake valves, Beehive spring, combustion chambers enlarged to 70cc, should have 10,0 - 1 compression ratio


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 12:38 pm

So bought Hugues 1,6 roller rocker and custom made pushrods.


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 12:43 pm



Alternator



Schumacher engine mount



New water pump and harmonic balancer. Mcload flywheel not shown.


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Re: 1971 340 build

Post by philcollins on Sun Feb 22, 2015 12:49 pm

Pertronix electronic distributor.




Checking pulley aligment




Next on agenda: painting original 1971 valve cover, rebuilding 6139S Thermoquad, electric ckoke conversion, TTI headers on order.

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Re: 1971 340 build

Post by Drache on Mon Feb 23, 2015 8:32 am

Very nice!

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Re: 1971 340 build

Post by Keith Mopar on Mon Feb 23, 2015 9:08 am

philcollins wrote:Had problem with Crane 1,6 roller rocker....
This is what I ran in my 340 Demon, with standard 340 spring , what was the problem.

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Re: 1971 340 build

Post by philcollins on Mon Feb 23, 2015 9:40 am

The rocker rollers were not centered on the valve tip. And even worse at full lift. Only 0,025" near the circumference of the tip.

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Re: 1971 340 build

Post by philcollins on Mon Feb 23, 2015 9:41 am


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Re: 1971 340 build

Post by philcollins on Tue Feb 24, 2015 12:48 pm


I modified an electric choke from a 1974+ to fit my original 1971 intake.







Le résultat:


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choke

Post by Dusmon on Tue Dec 01, 2015 7:32 am

[quote="philcollins"]
I modified an electric choke from a 1974+ to fit my original 1971 intake.



Have you run the engine yet?

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Re: 1971 340 build

Post by philcollins on Tue Dec 01, 2015 8:08 am


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Re: 1971 340 build

Post by JGL on Tue Dec 01, 2015 4:42 pm

If you only drive it in the summer you don't need a choke anyway, unless you want your car as it was when it came out of the factory.

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Re: 1971 340 build

Post by philcollins on Tue Dec 01, 2015 6:11 pm

I took out the electric choke, was not needed. I'm going back to the original choke. I also want my cars to function exactly as Mother Mopar designed them. So a choke is going in.

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Re: 1971 340 build

Post by JGL on Wed Dec 02, 2015 5:19 am

Right on.

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Re: 1971 340 build

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