340 on the dyno
Bought a 74 dart in June with a 70 340 in it. Ran good but had a rear main leak and some bad vibes. So I pulled it to freshen it and I had a hunch it had a cast crank. Which it did with the wrong balancer and torque converter.
It has old TRW forged pistons ccing in at 9.2 to 1.
Balled honed it with new rings.
Resized 2 rods and got a reman trw rod off e-Bay. #6 was too egg shaped to fix.
Elgin E935p 230, 230 @.050 480 lift cam. Some nos Johnson lifters
Did a good Serdi valve job with just little pocket porting. Has 2.02 1.60
Has a D4B intake someone redrilled.
New main and rod bearings.
Got the correct weighted balancer and b&m flex plate.
Ran a 750 Holley hp and a 750 Carter. Lost just a handful with the Carter. Only about 6hp average. At this power level either carb works great. The holley was a bit richer on the left bank for some reason. It has done this before, when I ran it on a 360 and a 383. i should probably look into that. I'm running the holley on the car now and it really runs nice all around.
Made 359hp and 364 ft lbs. Ignore that little blip at the beginning. That's dyno load in. Dropped it back in the same day and it rips pretty good. I like the cam for $134.00. Good drivability, nice sound, quiet under the hood, and flat torque curve. Who needs all that new fangled extra super duper extreme stuff anyway.
View attachment 1715955998
View attachment 1715955999
Bought a 74 dart in June with a 70 340 in it. Ran good but had a rear main leak and some bad vibes. So I pulled it to freshen it and I had a hunch it had a cast crank. Which it did with the wrong balancer and torque converter.
It has old TRW forged pistons ccing in at 9.2 to 1.
Balled honed it with new rings.
Resized 2 rods and got a reman trw rod off e-Bay. #6 was too egg shaped to fix.
Elgin E935p 230, 230 @.050 480 lift cam. Some nos Johnson lifters
Did a good Serdi valve job with just little pocket porting. Has 2.02 1.60
Has a D4B intake someone redrilled.
New main and rod bearings.
Got the correct weighted balancer and b&m flex plate.
Ran a 750 Holley hp and a 750 Carter. Lost just a handful with the Carter. Only about 6hp average. At this power level either carb works great. The holley was a bit richer on the left bank for some reason. It has done this before, when I ran it on a 360 and a 383. i should probably look into that. I'm running the holley on the car now and it really runs nice all around.
Made 359hp and 364 ft lbs. Ignore that little blip at the beginning. That's dyno load in. Dropped it back in the same day and it rips pretty good. I like the cam for $134.00. Good drivability, nice sound, quiet under the hood, and flat torque curve. Who needs all that new fangled extra super duper extreme stuff anyway.
View attachment 1715955998
View attachment 1715955999
