1971 340 build
5 posters
1971 340 build
by philcollins 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
Scat rotating assy: forged crank, conn rods and flat top pistons
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 11:30 am
Arp main studs, factory windage tray, Melling oïl pump.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 11:32 am
IMN Engine Indy X head, 2,12" stainless intake valves, Beehive spring
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins 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
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
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins 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.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins 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
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 11:40 am
...Last edited by philcollins on Sun Feb 22, 2015 12:31 pm; edited 1 time in total
philcollins- Posts : 790
Join date : 2015-01-27
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Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 11:40 am
...Last edited by philcollins on Sun Feb 22, 2015 12:32 pm; edited 1 time in total
philcollins- Posts : 790
Join date : 2015-01-27
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Re: 1971 340 build
by philcollins Sun Feb 22, 2015 11:41 am
...Last edited by philcollins on Sun Feb 22, 2015 12:33 pm; edited 1 time in total
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins 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
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 12:38 pm
So bought Hugues 1,6 roller rocker and custom made pushrods.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Sun Feb 22, 2015 12:43 pm
Alternator
Schumacher engine mount
New water pump and harmonic balancer. Mcload flywheel not shown.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins 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.
Checking pulley aligment
Next on agenda: painting original 1971 valve cover, rebuilding 6139S Thermoquad, electric ckoke conversion, TTI headers on order.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Drache- Admin
- Posts : 389
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Age : 40
Location : Williams Lake, BC -
Re: 1971 340 build
by Keith Mopar Mon Feb 23, 2015 9:08 am
This is what I ran in my 340 Demon, with standard 340 spring , what was the problem.philcollins wrote:Had problem with Crane 1,6 roller rocker....
Keith Mopar- Posts : 1441
Join date : 2015-01-20
Age : 65
Location : Calgary AB
Re: 1971 340 build
by philcollins 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.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by philcollins Tue Feb 24, 2015 12:48 pm
I modified an electric choke from a 1974+ to fit my original 1971 intake.
Le résultat:
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
choke
by Dusmon 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?
I modified an electric choke from a 1974+ to fit my original 1971 intake.
Have you run the engine yet?
Dusmon- Posts : 1
Join date : 2015-08-05
Re: 1971 340 build
by philcollins Tue Dec 01, 2015 8:08 am
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
Re: 1971 340 build
by JGL 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.
JGL- Posts : 4619
Join date : 2015-01-21
Age : 71
Location : Dieppe NB
Re: 1971 340 build
by philcollins 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.
philcollins- Posts : 790
Join date : 2015-01-27
Age : 67
Location : Caraquet N.B.
JGL- Posts : 4619
Join date : 2015-01-21
Age : 71
Location : Dieppe NB
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