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MORE POWER

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70 PULLER

02-22-2002 08:02:28




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I have JD 70 with 6.125 bore & 9.5 stroke stock carb & manifold about 85h.p. on dyno does any one have any ideas on more power ex.manifold work I tried a little and lost all my bottom end power THANKS in advance.




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JDGnut

02-22-2002 18:19:09




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 Re: MORE POWER in reply to 70 PULLER, 02-22-2002 08:02:28  
U can try a LP manifold.. Cut out the inside of the intake.. so each cylinder can feed off both barrels of the carb.. and polish it.. you can also cut a little into the head.. or at least make it so the air flows with out too much disturbance when going into the head.. You can also try 3in exhaust.. Well.. just some ideas.. Good Luck
JDGnut



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Deere Puller

02-22-2002 09:21:17




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 Re: MORE POWER in reply to 70 PULLER, 02-22-2002 08:02:28  
The best thing you can do is work with a reputable company relative to a good cam regrind. Dyno HP is great, but as you've found out, what really matters is low-end torque. If anything, work on the intake side of the head is most beneficial - Once you increase the volume of the exhaust / manifold area, torque can suffer dramatically. I've had good luck with Crower Cams in CA - if you give them your exact engine specs (including head numbers) they will be able to help. Don't try to run too much RPM, as these tractors will operate best when you set them up to work within their orignal torque/HP curves. I believe that I've talked with Brian Crower in the past. 85 hp is very respectable for a "70"

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JDM Guy

02-22-2002 08:22:15




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 Re: MORE POWER in reply to 70 PULLER, 02-22-2002 08:02:28  
Mr. 70

Have you tryed a high performance muffler. Or running a high performance oil and gas.



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