8-Cylinder Tech If you are one of the few with a V8 engine in your Ranger, or if you dream of a Ranger with a V8 engine, this is the sub-forum for you.

347 dyno

Old Sep 15, 2014
  #1  
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347 dyno

got the motor back together and dynoed it today it made 508 hp at 6,500 and it had a tq table not a curve it made mid to low 400 tq from 4,600-6500. we stopped it because it is a stock block.
 
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Old Sep 15, 2014
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NICE ! Great torque figure.
 
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Old Sep 15, 2014
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Is that for the ranger?! that would be one hell of a street truck lol once it hooks up doubt anything would touch it!
 
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Old Sep 15, 2014
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Awesome! I'll have a 347 of my own soon. Hope it pushes similar numbers!
 
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Old Sep 15, 2014
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Motor

Yes it's for the ranger but it's not a street truck fuel was like 10.00 a gallon. This is a track only. Thinking of going with a 9 inch and 4:30 gears
 
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Old Sep 16, 2014
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Nice project! Love to see when this thing is done! And yeah $10 a gallon won't cut it on the street.
 
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Old Sep 16, 2014
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The 9" is a good choice, the gears ratio will depend on the rear tires and the rpm you want to be turning when you go through the end of the strip.

You want your engine putting out full power, close to full rpms when you hit the final timer.
Post what your times are, will be interesting to see.

What rpms are you expecting .
What about the stock block, they are ok but they will twist up with too much owner.
There is a torque plate that helps some, it is mounted on the main bearing bolts, and is suppose to eliminate block twist.

Luck to ya !
 
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Old Sep 16, 2014
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the motor has main cap support. the truck has a cage but some people say its not a legal cage. i was told by the track it was good till a 11.00 i think. i think its going to make a pass to see what it does with the 3:55 gears so we know where we are at. i was thinking 4:30 gears. the motor builder said it shold be a good 6,000rpm motor all day long.
 
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Old Sep 28, 2014
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Icon2

Originally Posted by faststang90
...and it had a tq table not a curve it made mid to low 400 tq from 4,600-6500. we stopped it because it is a stock block.
LOL This made me laugh.
 
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Old Sep 29, 2014
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here it is
Name:  dyno_zpsb0f76d29.jpg
Views: 1321
Size:  93.0 KB
 
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Old Sep 29, 2014
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What are you using to tune (or is it carb'd)? A/F ratio is flat straight across the board.
 
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Old Sep 29, 2014
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its carb 750 holley/pro form body
 
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Old Mar 28, 2015
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made a few passes and the best pass was a 12.57@101.89. when you shift into 3rd gear the 1/4 is over so I think the 4:30s are needed.
 
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Old May 21, 2015
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I changed the shifter on it and we will see if its any better.
 
Attached Thumbnails 347 dyno-new-shifter-.jpg  
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Old Sep 22, 2015
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got into the high 11s

Name:  best%20pass_zpsm56dgh2k.jpg
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Old Nov 10, 2015
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had it dynoed to the tires and it made 356 HP/ 339TQ. we picked up around 25 hp to the tires and about the same on TQ
 
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Old Nov 10, 2015
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Nice!
 
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Old Nov 14, 2015
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made it to the track and it did not pick up as much as I was thinking. best pass was a 11.75 @115. I think the battery went bad because it did not want to start on the last pass
 
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Old Dec 5, 2015
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a little better

the cold weather help some.
 
Attached Thumbnails 347 dyno-11.65.jpg   347 dyno-pass-11.73.jpg  
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Old Jan 16, 2016
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a little better
 
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Old Jan 16, 2016
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not bad!
 
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Old Jan 17, 2016
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yeah I checked the plugs today and they was black. I don't know if the colder air made it that way. I'm going to go down a jet size in the front because it does not want to idle. I keep being told from others to go to a 850 carb but holley says it is to big now and I need a 600. I just don't have a extra 900.00 to buy the wrong part.
 
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Old Mar 26, 2016
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guess i'll see if it helps or not. Name:  holley%20xp%20750_zpso6krtebn.jpg
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