Administrators gav240z Posted September 6, 2015 Administrators Posted September 6, 2015 Let's see who wins the HP challenge! http://forums.hybridz.org/topic/119641-twin-cam-head-for-the-l6-from-derek-at-datsunworks/page-21 Good luck Peter! It's a great build, but doesn't interest me on the same level, the O.S Giken head is much more interesting because it's a cylinder head from that period. Yes good luck to them ..im taking the os to a new level ..its going injection 55mm itb drysump 13.1 comp hand made race pipes 90mm stroke monster only one thing in mind building the most outrageous NA L motor I love the fact that you're always challenging yourself to step it up to the next level Peter it's great to see. Quote
Riceburner Posted September 6, 2015 Posted September 6, 2015 Do you expect any issues with cooling when the block is grout filled? Quote
peter mc Posted September 6, 2015 Author Posted September 6, 2015 So far every block i have filled. We have not seen any change in cooling . As most of the cooling is needed at the top of the bore and head .. Quote
peter mc Posted September 9, 2015 Author Posted September 9, 2015 Working on the block this week. .making room for the 90mm stroke ..next week im flying over to japan to see os gikens engine man and get a few parts ..things are getting serious. .going to be a dream trip scott 1 Quote
GongZ Posted September 9, 2015 Posted September 9, 2015 Congratulations on the progress and have a great trip Peter - the excitement (and the engine) builds! Quote
Riceburner Posted September 9, 2015 Posted September 9, 2015 Keep those pictures coming Pete! Can't wait to hear this thing on the Dyno... I Can hear that 'Hakosuka GTR' YouTube clip in my head now. Quote
peter mc Posted September 14, 2015 Author Posted September 14, 2015 Well im flying over to japan next week to spend a few days with the head engine man at OS and then spend a day with the engine man at star road .so lots of pics coming up then the hard work starts .first up flow testing and then making the exhaust pipes .no small task . scott 1 Quote
Moderators PB260Z Posted September 14, 2015 Moderators Posted September 14, 2015 Have a great trip Pete, really looking forward to seeing your updates. Travel Safe. Cheers PB Quote
peter mc Posted September 27, 2015 Author Posted September 27, 2015 Having the best time in japan so many cool things to see .spent 2 days with the people at os giken factory. Just great people. And there motors were fantastic. gav240z 1 Quote
Moderators PB260Z Posted September 28, 2015 Moderators Posted September 28, 2015 Great to hear that you having a good time. How much excess baggage will you be bringing back Quote
peter mc Posted September 29, 2015 Author Posted September 29, 2015 Haha about 57kg over had to pay lots Quote
Riceburner Posted September 30, 2015 Posted September 30, 2015 Living the dream Pete. How did you manage to keep it to only 57kgs. Lol. Quote
peter mc Posted October 1, 2015 Author Posted October 1, 2015 So first day back i had to know how well the os24b1 head flows stock and then with a good port to clean up a few problems. Well first time on the bench it was quite clear the port was very small .and went in to choke and stoped flowing at 350 thou lift but still flowing 376hp . Next i spent several hours doing the port and fixing the seat area. Well i was very surprised. 440hp flow first test ..i think 450hp flow is not going to be tuff to find scott and gav240z 2 Quote
peter mc Posted October 1, 2015 Author Posted October 1, 2015 Many hours to go .and have to make a new set of valves .5 mm up in size to make best use of the seats .so its very possible theres 450hp flow .that will be one cracker L motor Quote
dat2kman Posted October 1, 2015 Posted October 1, 2015 X-ray/sonc it to check on port wall thicknesses, and variations in core shift to the water passages??? Quote
peter mc Posted October 1, 2015 Author Posted October 1, 2015 (edited) I have cut aways and seen the size i can safely go. The head of os giken engine department spent a day with me showing all the tricks . Edited October 1, 2015 by peter mc Yamahacam 1 Quote
peter mc Posted October 2, 2015 Author Posted October 2, 2015 Something to aim for .i was lucky enough to get a drive in this rocket all i can say is the sound was out of this world one sexy sound track Quote
mossy Posted October 2, 2015 Posted October 2, 2015 It did sound awesome Pete, and going by the video you were quite excited Quote
peter mc Posted October 3, 2015 Author Posted October 3, 2015 Haha yes mossy i was having a great time . I have a big job ahead of me getting this head to flow the air i want .but its there.i have the x section to get it to rev to 9000 on the 3.4L just need the itb to be 55mm and the pipes to go with it . Quote
Administrators gav240z Posted October 3, 2015 Administrators Posted October 3, 2015 I believe the video they are referring to is this. lightmaster240z 1 Quote
Riceburner Posted October 3, 2015 Posted October 3, 2015 It did sound awesome Pete, and going by the video you were quite excited Oh, I assumed it was a video with Pete driving or in the car. Quote
peter mc Posted October 3, 2015 Author Posted October 3, 2015 (edited) The video was of me in a hako at full nosie having a ball ..i will put it up soon i did get to drive all of the cars in that video even the toyota. What a cracker race car that is Edited October 3, 2015 by peter mc Quote
peter mc Posted October 4, 2015 Author Posted October 4, 2015 Ports are looking very nice now its taking some time to get something that works on such a big engine. . Quote
peter mc Posted October 7, 2015 Author Posted October 7, 2015 Lots getting done block prep work is well on the way . And ports are looking fantastic. Port flow is at 305 cfm through the intake. Steve at efi hardware is making a custom made set of itb for me .they are great to deal with .and clive cams are building a set of custom made billets for the new now very high flowing head ..its going to be very special Quote
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