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Tractor Pulling Discussion Forum

Re: How about a 900cid 4cyl for Natpa?

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Mmfan

03-09-2014 17:12:21
99.37.161.140



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Looks like a plan to me. It would be even better with the new heads....




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Underdog Moline

03-09-2014 18:08:14
71.87.61.49



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 Re: How about a 900cid 4cyl for Natpa? in reply to Mmfan, 03-09-2014 17:12:21  

Just under 500 horse

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Going to blow

03-10-2014 10:00:57
65.183.164.82



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:08:14  
If it"s producing nearly 500 horsepower, it really doesn"t need a new head, as the old head is flowing pretty good already.



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underdog

03-10-2014 09:00:35
66.87.115.137



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:08:14  
500 seems a little high to me but ok. How come your distributor has 8 wire ports are you running 2 plugs per cylinder some how?



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underdog

03-10-2014 07:32:31
66.87.115.137



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:08:14  
500 seems a little high to me but ok. How come your distributor has 8 wire ports are you running 2 plugs per cylinder some how?



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A.P.

03-09-2014 18:17:52
99.110.100.168



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:08:14  
At what RPM?



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Underdog Moline

03-09-2014 18:36:52
71.87.61.49



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 Re: How about a 900cid 4cyl for Natpa? in reply to A.P., 03-09-2014 18:17:52  

shiny stuff



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Cliff S

03-11-2014 08:14:22
70.192.129.71



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:36:52  
The shiny intake Manifold won't pass NATPA Rules

Cliff S



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Dieselbear

03-11-2014 12:08:17
50.193.137.17



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 Re: How about a 900cid 4cyl for Natpa? in reply to Cliff S, 03-11-2014 08:14:22  
Maybe it's set up to run against alot hotter stuff than what NATPA runs. Nice group, but they ain't everything!



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dboll

03-11-2014 18:33:03
72.251.115.66



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 Re: How about a 900cid 4cyl for Natpa? in reply to Dieselbear, 03-11-2014 12:08:17  
Well the title of the post is "How about a 900cid 4cyl for NATPA?" One might take that as the original meaning.



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Cliff S

03-11-2014 15:08:54
70.192.133.66



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 Re: How about a 900cid 4cyl for Natpa? in reply to Dieselbear, 03-11-2014 12:08:17  
Dieselbear
I was Just going by what the main topic was refurring to NATPA with the manifold!

I am sure its set up to pull where there is a high speed limit or no speed or Rpm Limit!

Cliff S



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Tim Yates

03-12-2014 11:04:48
70.208.134.121



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 Re: How about a 900cid 4cyl for Natpa? in reply to Cliff S, 03-11-2014 15:08:54  
Cliff, it will pull without the high Rpms It has a governor and yes it will run with the best of them at 3,6 or 12 mph classes. I know you are a Natpa guy but there are a lot of tractors out there that can pull with or stomp the best Natpa tractors. Everybody can be beat. These guys choose not to pull with that organization. From my point of view Natpa is more suited to northern-Midwestern region pullers for logistics.not everyone wants to spend 10 or 20,000 for an engine to run 3.5 mph class that the engine has to "look" stock in.

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jd plowboy

03-09-2014 19:08:23
69.160.179.240



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-09-2014 18:36:52  
you can bet it will be bad a$$



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Underdog Moline

03-10-2014 11:08:33
71.87.16.126



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 Re: How about a 900cid 4cyl for Natpa? in reply to jd plowboy, 03-09-2014 19:08:23  

That is only .55 HP/CI if/when it cranks out 500hp

Figure the new LSX has about .58 HP/CI and that is N/A

The 5.9 hemi .99 hp/ci the 6.2 is 1.16

Even a 1988 Dodge caravan with a 2.5L 4 cylinder was at .65 HP/CI

That means that it can be less efficient than a 1988 Caravan and conservatively make 500 HP!

OK one more just so I am being fair the 1985 Chevy Chevette was 97.7ci and 70hp giving it a .71 HP/CI not sure if that makes the Chevette better than the caravan or i have just confused everyone

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wi50

03-10-2014 11:18:43
173.248.8.242



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 Re: How about a 900cid 4cyl for Natpa? in reply to Underdog Moline, 03-10-2014 11:08:33  
We're making around 7hp per cube. Highly boosted 505 cid engine with an efficient cylinder head. But we're running at about 7 atmosphere's of pressure in the intake at the valve.
So does that mean it's 1hp per cube naturally aspirated on a 505 cid engine? It's not uncommon at all.

It comes down to how much air you can pack in a cylinder. Making the engine bigger isn't the answer if you can't feed it.

I love that intake setup!!
This post was edited by wi50 at 11:19:17 03/10/14.

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LW

03-10-2014 11:36:53
70.210.11.227



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 Re: How about a 900cid 4cyl for Natpa? in reply to wi50, 03-10-2014 11:18:43  
I don't claim 500hp! Lol I do think 290-300 ish is more than realistic. Thanks Marty the aluminum is much easier to work with making the intakes. Plus its purty



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