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Porting a 1.6 head
by
TUFFY
on 14 Feb, 2013 06:04
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Hi, I am building a 1.6 for tractor pulling. I will need to push it pretty hard to compete. Going to port a 1.6 head. On a turbo engine should I open up the exhaust side a bunch as well as the intake side?
I am hoping to run 40+ psi of boost if I can get enough fuel into it.
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#1
by
bbob203
on 14 Feb, 2013 12:07
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EYES ON THIS THREAD!
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#2
by
TUFFY
on 14 Feb, 2013 21:03
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Hopefully I can post a video this summer of it running good, or not as the case may be lol.
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#3
by
8v-of-fury
on 14 Feb, 2013 22:10
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#4
by
Alcaid
on 15 Feb, 2013 08:32
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If it's a hydro head put in some AAZ intake valves. They are the same length as 1.6TD but 2mm bigger (both 7mm and 8mm stem diameter available)
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#5
by
bbob203
on 15 Feb, 2013 09:03
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do valve seats need to be recut if u p&p a head?
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#6
by
justiz00
on 15 Feb, 2013 09:16
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If it's a hydro head put in some AAZ intake valves. They are the same length as 1.6TD but 2mm bigger (both 7mm and 8mm stem diameter available)
Is there a benefit to going to 7mm instead of 8mm (less stem to block airflow, etc.)?
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#7
by
Alcaid
on 15 Feb, 2013 09:39
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Yes, better flow, but it requires changing the valve guide, valve seal, locks and retainer.
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#8
by
CRSMP5
on 15 Feb, 2013 19:17
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bbob.. yes... need to remove guides to port it properly.. guides = recut, so when valves lapped in it on fresh surface.. if your doing it right...
any one can half arss it.. but for what he doing.. skimp = fail..
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#9
by
BoostedOne
on 15 Feb, 2013 21:33
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If it's a hydro head put in some AAZ intake valves. They are the same length as 1.6TD but 2mm bigger (both 7mm and 8mm stem diameter available)
If he has a hydro bottom end, wouldn't he come out ahead just using an entire AAZ/1Y etc any 1.9 head then a PD150 intake? The 1.9 D ports look SOOOO much better than the 1.6.
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#10
by
Alcaid
on 16 Feb, 2013 00:54
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Upsides and downsides with the Franken combo, the valve chamfer around the valves in the head does not really match up with the 1.6 bore, neither does the prechamber port end up in the correct location. But it flows well anyway. I guess this might explain some of the knocking noise one sees on the Frankens.
For a daily driver I would use a 1.6 head to keep the easy cold starts and for less knocking sounds. For a full race engine, the 1.9 heads have their strength in the fact that they lower compression ratio alloeing more boost.
Both heads have massive gains available through porting!
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#11
by
TUFFY
on 16 Feb, 2013 05:55
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I have a solid lifter engine.
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#12
by
TUFFY
on 16 Feb, 2013 06:26
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Thanks for all the info and advice. I am starting out with a 1.6 head because that is what I have. I don't want to stick a ton of money into this until I see how it competes.
Can I put 1.9 intake valves in a solid lifter 1.6 head? I don't have my head apart yet so I don't know what size the guides are.
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#13
by
Alcaid
on 16 Feb, 2013 06:31
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Solid lifter heads have different valves IIRC, meaning 1.9 valves won't fit
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#14
by
MJF
on 17 Feb, 2013 00:44
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1.7, 2.0 and 2.4 engines has 36mm intake valves which fit. Exhaust valves are same size in all diesel engines.
All these came up on the first page with just porting entered in the search. The information is out there.. lol