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| Tractor Pulling Discussion Forum |
Topic: Re: fuel needed?
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| buickanddeere
12-16-2012 11:19:16
184.151.63.216
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What if any quench in that engine combustion chamber? Are you planning on 25-35 thou of cold clearance between the piston and head? That will increase power and reduce detonation .
The cam duration can vary the compression pressure from requiring fuel from 87 to 115 octane . Tell you cam grinder what you have as a combo and they will grind to match.
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| Farmall m 421
12-16-2012 17:52:40
68.171.231.86
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Re: fuel needed? in reply to buickanddeere, 12-16-2012 11:19:16
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| A cam that would allow me to run 87 octane fuel would have overlap to the point that it would barely even run at 1500 rpm. If I want max torque at 1500 then I am going to have short duration and very high cylinder pressure. I want to know if I can run something in the 100-105 octane range, 110, or do I need something better like Q16? 87 aint gonna do for this.
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| ss409
12-16-2012 19:32:48
72.53.194.237
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Re: fuel needed? in reply to Farmall m 421, 12-16-2012 17:52:40
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| 110 did just fine at 300psi cranking psi, under full load, at 180 degree temp for 3 minutes on dyno.
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| Farmall m 421
12-17-2012 02:48:20
68.171.231.80
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Re: fuel needed? in reply to ss409, 12-16-2012 19:32:48
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| Thanks. What brand? VP110 or something else?
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| ss409
12-17-2012 07:36:12
72.53.194.237
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Re: fuel needed? in reply to Farmall m 421, 12-17-2012 02:48:20
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| vp works fine. you was talking about cams there,,,, i dare ya to start with a 450 cam grind. if ur turning 1500 n under rpm, in my experiences, the 450 cam grind did very good in my engine. itll lug clear down to under 1000rpm n still chug out triple digit power. try it as a baseline n work ur way up.
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| Farmall m 421
12-17-2012 09:09:27
68.171.231.85
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Re: fuel needed? in reply to ss409, 12-17-2012 07:36:12
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| Do you have the stock 450 cam specs?
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