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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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No life (a.k.a. DattoMaster)  
Joined:
2002/10/28 6:49
From under the Firmament LOL no twiglight effect BS
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boost a stock round port head with slight porting in a simple suck through
with SU or LPG/Impco 225 with rb30 throttle body will get 100hp atw.
Posted on: 2011/5/8 5:04
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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Home away from home  
Joined:
2010/1/2 8:56
From Sydney
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turbo set up that would be nice... anyone selling a turbo kit???
Posted on: 2011/5/8 4:17
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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No life (a.k.a. DattoMaster) 
Joined:
2009/8/26 6:58
From mandurah
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Chris was that the motor that was in your thou ? Did it have webers before solexs ?
Boosted A15 +1
Posted on: 2011/5/8 4:10
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77 1200 ute
77mm bore a15 ,12:1 comp
ported and reconed h89 head
fairly aggro cam ,billet rocker spacers
twin 40mm solex carbs on bpro manifold
MSD 6al2 with 2 step limiter
4speed 60a box
hd clutch
2 inch exhaust
locked 4:11 ute diff
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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No life (a.k.a. DattoMaster) 
Joined:
2007/1/22 23:06
From East New Britain, Papua New Guinea
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+1 for A14/15.
Posted on: 2011/5/8 3:42
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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Moderator  
Joined:
2001/5/3 7:04
From 48 North
Group:
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Contentmaster
Usermaster
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A14 or A15 with GX head can make 100HP with the right intake, carbs, cam, exhaust and ignition.
Yes turbo would be the cheapest way.
Posted on: 2011/5/8 3:41
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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No life (a.k.a. DattoMaster) Joined:
2007/1/22 23:06
From East New Britain, Papua New Guinea
Group:
Registered Users
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That's true but the H75 is just as good as the H89 once you have decked the head past that large open cylinder volume you can see surrounding most of the combustion chamber.
You won't make 100hp with a NA A12 unless you have at least 5 grand to spend and access to methanol (and a really good A-series builder at that). The A12 I had saw a little over 100hp ATW running twin 45 DCOE's a very big ported big valved GX head and a fairly rich dose of methanol. It was tuned back to 95hp for reliability.
Best to throw $1500 on a nice boosted setup and hope for the best.
Posted on: 2011/5/8 3:36
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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Moderator Joined:
2001/5/3 7:04
From 48 North
Group:
Registered Users
Contentmaster
Usermaster
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H75 is not a great head, it is open chamber. A standard H89 head (closed chamber) would be better. Both have the same compression ratio, but open chamber results in less emisssions, and closed chamber results in more HP.
If your goal is a 100HP engine (which is difficult to achieve with only 1.2 liters) You should use a large port head. There are two: A12 GX head or Nissan Competition head. The Comp head uses the GX casting but has larger A14-size valves. You can always fit the larger valves to a GX head.
Attach file:
 H72_chamber.jpg (35.23 KB)
Posted on: 2011/5/8 3:25
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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No life (a.k.a. DattoMaster) Joined:
2009/8/26 6:58
From mandurah
Group:
Registered Users
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It still needs valves ,springs ,retainers and rocker gear too so thats another 200 odd youll need to spend
Posted on: 2011/5/8 3:15
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_________________
77 1200 ute
77mm bore a15 ,12:1 comp
ported and reconed h89 head
fairly aggro cam ,billet rocker spacers
twin 40mm solex carbs on bpro manifold
MSD 6al2 with 2 step limiter
4speed 60a box
hd clutch
2 inch exhaust
locked 4:11 ute diff
...
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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Home away from home 
Joined:
2011/1/31 2:06
From melbourne
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Registered Users
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Mmmm Bit pricey. For that sort of money you could do alot better
Posted on: 2011/5/8 2:58
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Re: OVAL CYLINDER HEAD H75, DATSUN 1200 B110 B310 A14 A15 |
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Home away from home Joined:
2010/1/2 8:56
From Sydney
Group:
Registered Users
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my goal is to reach 100hp im just not sure if this would be a direct bolt on ?
Posted on: 2011/5/8 0:45
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