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#4 (permalink) | |
![]() Join Date: 2nd October 2007
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Dont think its any thing like the Endyns work at all. The TODA RRC its not even cut open, so the runners entrance can not be worked. Last edited by BRM; 19th October 2012 at 22:11. |
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#6 (permalink) |
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This is a real story.
Some time ago a friend of mine bought a rbc mani worked by one of the "best" usa tuners that port heads and mani for kseries. Imported from this tuner in the usa. The car had x bhp after tuning. But, some months after, he sold the car and the mani was out of the car and was lost. So he bought a rbc and ported the rbc himself for about 2 hours (never ported anything before) and said to the buyer "this a rbc ported by one of the best usa tuners"! The mani was fitted to the car and we went to dyno... The car made 5hp more than the big ported rbc from the real usa tuner!! After that all i can say is i don't believe on intake mani that comes from usa. |
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#7 (permalink) | |
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I was reading a ported RBC still doesnt make as much as the RRC which is why I was thinking a ported RRC must be awesome. But it appears most of the tuners in the US only seem to port the RBC. I was also reading the Skunk2 is meant to be good for porting as there's more material on it and it can be worked more. |
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#8 (permalink) | |
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Fancy sharing Names Nuno? Also, one cant put a Heavily ported Intake Mani on a set-up that doesnt mach, its the combination of parts that make the "best" power. Not just one or a randon number os parts put together. |
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#9 (permalink) |
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The specs of the car was bc stage 2 cams, ssr header, 76mm skunk 2 exhaust, bi cai, big tb, 11.9 cr, stage 2 head and ported rbc... From the usa.
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#10 (permalink) | |
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Who did the porting of the Head and RBC? Portflow? Last edited by BRM; 20th October 2012 at 01:06. |
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#17 (permalink) |
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I looked into this. They don't chop the top of the plenum off so the plenum end of the runners can't be worked on. Even if you were to do that, when you weld the plenum cap back on you'll then have untidy weld and rough surfaces on the inside of the plenum, which could be self defeating for airflow. I know they port out the TB entry to the manifold but I don't know whether they port out the end of the runners that bolt to the head. Even so, that might not be very effective unless you port match the inlet ports on the head...
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#18 (permalink) |
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My trick Aluminium welding is try not to fully penetrate the joint, if you know what you are doing then the inside of the weld should be smooth and free of any weld. Not all that great for anything that requires structural rigidity but for an intake manifold, intercooler, pipework etc it's ok.
From what I know, the RRC isn't all that popular for porting in the states mainly due to costs and availability, but people that have ported them have seen better results over the RBC. The skunk2 intake manifold does have more material therefore more potential but more flow doesn't always mean more power, as already mentioned in this thread everything has to be matched to work together. Ideally you would have flow bench numbers with these ported manifolds, I know some companies do bench test them, (some are just going at them with a dremmel!) If you have a stock K20 with bolt on's then your intake manifold flow requirements would be different for that of say a K24 setup with cams .. I think flow numbers are the key here. Lou |
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Thank You to Lou Connor from 3 Users:
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#20 (permalink) | |
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Quote:
If the work is done properly, that shound be a problem:
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