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Old 2nd December 2018, 08:31 PM   #21 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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Thanks Alex, how are you mate? I’m going to try and make an effort to take pictures and post em up so watch this space...
Mart! Thanks mate. It will be awesome if I can achieve what I’m after which is the perfect blend of modified and original parts. If it’s put together right and set up well the whole thing will come together as the perfect Nissan Skyline GTR
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Old 12th December 2018, 09:23 PM   #22 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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... I made a start on lightly porting the inlet side of the head..image.jpeg this is before.
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Old 12th December 2018, 09:25 PM   #23 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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image.jpeg
And this is what it looks like after about 25 mins with the Dremel. It doesn't show well in the picture but it's smooth to the touch and you could cut your finger in the dividing plate between the ports. Hopefully this will help with the airflow in.
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Old 14th December 2018, 04:09 PM   #24 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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And the exhaust side. Beforeimage.jpeg
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Old 14th December 2018, 04:11 PM   #25 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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And after I removed the lump. Different port, I know but all look the same. image.jpeg
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Old 14th December 2018, 09:07 PM   #26 (permalink)
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Also port match the inlet while you are at it - like this.
Attached Images
File Type: jpeg 9FFA727B-4141-4334-8998-AE9EDEBD261F.jpeg (1.02 MB, 9 views)
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Old 14th December 2018, 09:19 PM   #27 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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I like it Younes!! I will give it a bit of a tickle but not go mad. Il taper the edges too so you don’t get the small step between parts. Did you do that or is it somebody else’s?
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Old 14th December 2018, 09:53 PM   #28 (permalink)
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The edges are factory chamfered so won’t be a flush fit if you know what I mean. I got the guy doing the porting to do it back in 2014. I opened it up last summer to fit my Nismo plenum. There was a fair bit of material removed along with the porting there is a good level of off boost torque at low end but also having type a cams somewhat helps.

Btw you will need to fit the gasket - steel one and cut that too while matching the ports as that will be your restriction otherwise.
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Old 14th December 2018, 10:10 PM   #29 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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Good point, yes I’ll do that too thanks! I’m not going to take lots off so hopefully won’t need loads off the gasket.
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Old 15th December 2018, 10:08 AM   #30 (permalink)
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That looks really good!
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Old 15th December 2018, 02:44 PM   #31 (permalink)
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Thanks!
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Old 15th December 2018, 04:05 PM   #32 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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Thanks! I’m hoping it’ll make a difference.
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Old 15th December 2018, 05:52 PM   #33 (permalink)
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Quote:
Originally Posted by Jimbostir View Post
Thanks! Iím hoping itíll make a difference.
I hope so! I'd like the same done to mine later in 2019! Lol
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Old 18th December 2018, 10:22 PM   #34 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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Another thing I did was this...9194D5FB-2044-492D-BAD0-BE4043CBB981.jpeg
Taking away the sharp edge will help reduce hot spots and also will help flow of gasses around the valves. I believe that on the gt500 head they took the lump out all together but I donít want to kill response off boost completely.
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Old 19th December 2018, 11:26 AM   #35 (permalink)
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Looking good fair play to you doing it yourself.
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Old 19th December 2018, 11:48 AM   #36 (permalink)
Jimbostir is Wondering if Andy H has lost his Pistons?.
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Thanks mate. Most of the fun and satisfaction for me is doing it myself. More to come soon. ...
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Old 2nd January 2019, 06:47 PM   #37 (permalink)
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I’ve been thinking about what exactly to do with This over the last month or so. Being the Xmas period and speaking to various people with beer involved I’ve now decided to pull the block out and put some forged internals (reasonable priced stiff) with an N1 pump and spline drive kit. This way I can wind the turbos up to about 1.5-1.6 bar and not have to worry about it. Pistons I’m thinking 87mm to get the 60cc extra (which I know isn’t much but I’m going to get the block bored anyway)
Il be able to paint the block nicely and clean the bay up too. I’ve not budgeted for this (time or money) so it’ll be a project that I hope to get running late summer, and run in ready for mapping. 600+hp flywheel is my goal which is very achievable. The goal is to get as quicker spool and low down torque I can with 2.6L
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Old 2nd January 2019, 06:51 PM   #38 (permalink)
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Old 2nd January 2019, 06:55 PM   #39 (permalink)
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Old 2nd January 2019, 06:56 PM   #40 (permalink)
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