nice write up
GL on your build :thumbsup:
GL on your build :thumbsup:
You should be fine with the Injen CAI as well although I havent tested it.very nice work. guess i need a fujita now....fuck
He's running 50*what vtc gear are you running?
50what vtc gear are you running?
Great power guys, you both used to make that at part throttle :shakehead:Well the question for me was the low end TQ gain of the RBB enough to outway the loss in WHP on top with the RBC? In my case I dont think so. Can I prove it 100%? Not yet but I will. After getting tuned at T1 which I have been going to for years with other projects on this car I came away with 205whp\174tq.
Tony as usual did a wonderful job on the car but we all quickly realized that the car was making what it was going to make with the RBB manifold. You can see from the graph that all the tq was made as expected in the midrange but because it fell so quickly so did peak power. Erik Loza also got tuned that day with his K24 with RBC and stage 1 Toruku cams and has the dyno which shows ours results overlayed and you can clearly see how the RBC puts the power on top.
After some discussions with Tony we all agreed that since I already have the RBC its worth the easy effort to bolt it on and retune since 15+ should be gained on top which is something I could definately feel. I will be putting the RBC manifold on and getting retuned shortly and will post results.
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Thomas, here are our respective graphs, over-laid...
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I just wanted to say again how much I appreciate that Tony at T1 was able to tune us both on the same day and that you were willing to give the RBB a shot, Thomas. So mamy times, the "gospel" we see is really just apples to oranges and everyone runs with it instead of trying it, themselves. I think we both knew that the RBC would out-perform the RBB on the top but the surprising thingto me is how the torque plots for both our cars were almost identical for most of the range. That is what is special about the K24's: They will make torque, no matter what.
What I am really looking forward to is seeing how your car does with the RBC back on it and the late model TSX cams. Since you have a 50-degree VTEC gear on there, we'll get to see how potential they have on the top end. Thanks again, dude... :beerchug:
Erik
Well, OK I guess but based on how the torque falls off after 5,000rpm's, I can see no reason why anyone would want a stock TSX manifold over the RBC on their car. Another indicator of how bad that manifold chokes the motor is that despite the fact that Thomas has one of the best headers you can buy on the car and a very free-flowing exhaust, the motor made no more power than a stock TSX engine....one reason why i like street tunes over dyno tunes
I think that's very true. From the results (and thanks again to all members who were involved), the RBB just becomes a bottle neck. What was most surprising to me is how closely the graphs were to each other in the low to mid range. Which is were all of the argument for the RBB was. Hell, if I didn't have a blower sitting on my work bench I would probably go get an RBC.Well, OK I guess but based on how the torque falls off after 5,000rpm's, I can see no reason why anyone would want a stock TSX manifold over the RBC on their car. Another indicator of how bad that manifold chokes the motor is that despite the fact that Thomas has one of the best headers you can buy on the car and a very free-flowing exhaust, the motor made no more power than a stock TSX engine.
I was right there while Tony was doing the pulls and you could audibly hear his motor struggling to breathe at the top of the pull. It was like it just could not go any farther while the RBC kept climbing.
Tony brought up a really good point after we were comparing results between the two setups: All the parts need to combine to create one harmonious system and if you insert a part into the equation that does not compliment the others, then that becomes your limiting factor. So, while Thomas has a header and exhaust capable of supporting as much power as he can throw at it, when you install a manifold designed to give a 4-door passenger car with a 2.4L motor and automatic transmission a flat torque curve for around-town driving, you will probably get results just like the factory wanted: Stock power.
If that's what someone wants, more power to them bu based on what we saw the other day, there is no reason to use any Honda manifold other than the RBC (or RRC, I guess) on a K24 that you plan to get more than 200hp out of. Just my opinions, of course.
The cams are very mild: They still use the OEM valvetrain. But you can wait for a while and see what Thomas' results are when he gets re-tuned with the RBC. The plot will probably then look like mine.sucks though the rbc manifolded k24 has cams in it, i wanted to see what it does without cams