BOBBYr34 Posted May 9, 2011 Share Posted May 9, 2011 Here are some photos of Bobby's RB26 head with porting and modifitcations. Bob would you like to explain what's been done here? Thanks JEM Not sure if anyone has noticed the exhaust port, the bump has not been cut out, I know everyone out there has cut this out but john has not cut it out?? let see who can tell me why?? Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803183 Share on other sites More sharing options...
waxracing Posted May 9, 2011 Share Posted May 9, 2011 Yes I noticed it. I was wondering about it myself but not going to say anything Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803186 Share on other sites More sharing options...
paulR32gtr Posted May 9, 2011 Share Posted May 9, 2011 Not sure if anyone has noticed the exhaust port, the bump has not been cut out, I know everyone out there has cut this out but john has not cut it out?? let see who can tell me why?? I honestly have no idea, but ill take a stab at it causes turbulence which helps bind the pulse together, so ultimately it will hit the turbine wheel more effectively. Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803202 Share on other sites More sharing options...
Nur33 Posted May 9, 2011 Share Posted May 9, 2011 I'm pretty sure my head that Mark done hasn't got that bump taken out either and our head is identical to his Drag car setup, maybe it might disturb the flow of things. Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803209 Share on other sites More sharing options...
waxracing Posted May 9, 2011 Share Posted May 9, 2011 Ha ha ha sounds impressive Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803210 Share on other sites More sharing options...
BOBBYr34 Posted May 9, 2011 Share Posted May 9, 2011 Well the correct answer is, there is a water gallery right behind it if you cut it out your wall thinkness is reduced to <1.5mm think, this was found when we got a rb26 head and John started to cut sections out of it, he has checked the whole head where he could gain more performance from it and at the same time keep away from any thining walls. You can see it in the below pic Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5803246 Share on other sites More sharing options...
BOBBYr34 Posted May 10, 2011 Share Posted May 10, 2011 The motec setup see below pics M800 E888 Ignition Expander Shift light M800 - Will run all the factory sensors plus run twin Nismo AFM no Map for tunning. Control diff, trans, and front diff cooling pumps, Dual lambda, custom wiring for 12 injectors all running sequential ,speed controlled Fuel Pump, fuel pressure sensor, fuel temp sensor. E85 analyser for ethanol content (zeitronix sensor), water methanol injection E888- Will be used for 8 k type thermocouples installed in the manifold runner and exhaust, 4 pressure sensor exit of compressor housing to the plenum. 4 air temp sensors exit of compressor housing to plenum. Compressor wheel RPM,Diff temp,trans temp. Ignition Expander - this will control the sequential IGN as the output on the M800 are used for the other set of injectors. Shift light - This has three different colour on each light that can be configured for warnings and shift lights Motec would have to be one of the best ECU system for a car as you can make it do what ever you want it to. Yes it is expensive however if you want to do it properly then this is the product. I was very happy that Just Engine Management is a dealer for Motec and Adam at Jem advised what the car needed, i guess this is just the beginning as i am sure i need alot more Motec equipment to complete the car. 1 Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5805156 Share on other sites More sharing options...
BOBBYr34 Posted May 10, 2011 Share Posted May 10, 2011 The wastegate collector has been slow as John has been busy making the die. See below Vid He is making this die so he can beat the pipe into this shape for each of the two wastegates entering the dump to form a venturi. I know this is getting out of control however i guess, him making these things is all a challenge to him also. 1 Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5805168 Share on other sites More sharing options...
r33_racer Posted May 10, 2011 Share Posted May 10, 2011 Awesome! I wouldnt say getting out of control, more like its going perfectly. 1 Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5805291 Share on other sites More sharing options...
bigmikespec Posted May 11, 2011 Share Posted May 11, 2011 (edited) Are you using the stock ATESSA computer or will the Motec control that too? Thanks for your reply too Bobby Edited May 11, 2011 by bigmikespec Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5806056 Share on other sites More sharing options...
BOBBYr34 Posted May 11, 2011 Share Posted May 11, 2011 Are you using the stock ATESSA computer or will the Motec control that too? Thanks for your reply too Bobby Will let the standard ATESSA ecu control that, been a V-spec it should be ok Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5806132 Share on other sites More sharing options...
thrtytwo Posted May 18, 2011 Share Posted May 18, 2011 Any updates on this ? fantastic build mate, cant wait to see all the fab work finished! Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5819429 Share on other sites More sharing options...
BOBBYr34 Posted May 18, 2011 Share Posted May 18, 2011 Hey Everyone, Things are going slow must be the weather lol. So i am open for questions if anyone has any. I should have some new footage by Friday fingers crossed Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5819904 Share on other sites More sharing options...
sucram Posted May 19, 2011 Share Posted May 19, 2011 Been watching this for a while. Its interesting! I have a Q for you, what size ID are your manifold runners. I dont think it was mentioned before Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5820504 Share on other sites More sharing options...
BOBBYr34 Posted May 19, 2011 Share Posted May 19, 2011 Been watching this for a while. Its interesting! I have a Q for you, what size ID are your manifold runners. I dont think it was mentioned before Aaaahh Yes i did forget to mention the ID for the runner its 1.5 inches Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5821549 Share on other sites More sharing options...
SRB Posted May 19, 2011 Share Posted May 19, 2011 bobby, with motec it doest stop haha by the time i finished with my car it was well into the 30s!! wiring, slm, dash, 1 million sensors it gets up there fairly quickly!! Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5821668 Share on other sites More sharing options...
BOBBYr34 Posted May 19, 2011 Share Posted May 19, 2011 bobby, with motec it doest stop haha by the time i finished with my car it was well into the 30s!! wiring, slm, dash, 1 million sensors it gets up there fairly quickly!! Yes i know i was just told today i have to use some special wire "tefzel" for all the sensors with raychem. Also i dont see anyother ECU out there that can do what i need it to do. Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5821865 Share on other sites More sharing options...
GMASTR Posted May 20, 2011 Share Posted May 20, 2011 Yes i know i was just told today i have to use some special wire "tefzel" for all the sensors with raychem. Also i dont see anyother ECU out there that can do what i need it to do. Awesome build dude keep us posted ! I know of a good ECU "Apexi power fc" does the job for me lol Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5823521 Share on other sites More sharing options...
BOBBYr34 Posted May 24, 2011 Share Posted May 24, 2011 John has started to make the merge collector for the wastegate. Below is a very brief vid, we ran out of time i will get a full detailed vid on thursday. Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5831015 Share on other sites More sharing options...
Beer Baron Posted May 25, 2011 Share Posted May 25, 2011 loving the thread mate. great stuff. I would love to come and talk with john about his ideas one day. he is a fantastic craftsman that's for sure. I run a motec in my 32 too, not nearly as comprehensive as yours though! but it does run very nicely. I'll echo some previous thoughts on using an EFR turbo. I have a lot to do with both borg warner and full race at the moment and would be happy to make an introduction? I'm sure they could supply the info john needs to make an informed decision about their product. pm me if interested. Link to comment https://www.sau.com.au/forums/topic/355547-r34-gtr-build/page/12/#findComment-5832128 Share on other sites More sharing options...
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