rofl do you have any RBC's left?Quote:
Originally Posted by EUR003act
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rofl do you have any RBC's left?Quote:
Originally Posted by EUR003act
i have one but its cut down to fit a K20 cylinder head (no coolant bypass)...Quote:
Originally Posted by johnprocter
and im thinking of keeping that for my display engine... lol yes i have a display engine lol shhhhh :zip:
LOL btw do aftermarket cats/high flow cats get bolted onto the exhaust or welded? i have a titanium catback and duno if i can put a aftermarket cat on cause u cant really weld anything to titanium (well barely any shops can do it in aus)
welded...Quote:
Originally Posted by johnprocter
theyre normally welded into a short section, and then thats bolted in....
This thing is gonna be a bigger beast than Justin's :eek: hahaha
you back from holidays buddy!?!?Quote:
Originally Posted by akina
coming on the batemans bay cruise??!
next week :D
we'll see what happens, seems a little far lol...
Thanks man, your thread was the inspiration, hehe. Can't wait for your RSP results, if they're incredible there might be another RBC on the market soon. What gasket does the RSP use? Just a normal K20a one like RBC?Quote:
Originally Posted by EUR003act
I'd prefer to keep all my oem parts lying around as I have been. But I'll see if I can let the header go, I'm not sure how much they go for?
I'm 99% on the Bateman's Bay cruise. If you bring parts for a garage sale I'll bring my wallet, lol. Just make sure you post up what you're gonna be bringing if you do bring stuff. Waiting anxiously for intake!!! :p
Because my header has the JDM flange but the catback has the normal flange they left the whole thing as bolt on. So my exhaust can be split from the headers to the cat to the catback, easily done. Nothing is welded to anything else, meaning no cutting is required if I wanna swap 1 part :D . How were the gains with the DC sports header? How is the J's racing catback? Does the car feel like it's breathing well at high rpm?Quote:
Originally Posted by johnprocter
"It's a tall order, but we're taller" :pQuote:
Originally Posted by akina
As I said though, different approaches. I think I'm doing a few things Justin isn't/hasn't done yet such as cams and I'm looking to swap final drive soon. But it should be interesting to see the final results with different approaches.
Justin's is the king in my eyes and my ideas have basically all been inspired by him. When we both deem our respective cars as 'finished' it should be interesting to see the differences, but I still think he'll be on top :(
Update
I'm still waiting on the throttle body which I hope will arrive in the next few days. The RBC has really taken it's toll on low end torque, and the more I drive the car and stop being distracted by the sound the more I realise it's not that much quicker either even with headers.
I've concluded that all I've done is increased the size of the bottle neck and moved it around. The RBC loses low end torque because of turbulence in the runners as air doesn't travel straight in large thin runners unless there's huge engine vacuum pulling it in. I think that to actually benefit from an RBC manifold a few things need to be done.
1. Increase the bore of the RBC intake
2. Increase throttle body size to match
3. Have an air intake that can easily suck in more air than the TB/RBC can digest.
Thinking about it logically today while bored at work, I realised that the RBC's design ruins a bit of low end torque to make more peak power. It makes that peak power by being able to handle more air flow. But there's no point to this additional potential for air flow if the air isn't there, you've only taken away bottom end torque and replaced it with nothing. The throttle body is still a big limitation and the intake before that, so when they're replaced the benefits of high rpm with the RBC should be much more noticeable. Right now the car feels like an athlete would running a marathon breathing through a straw. The potential is there but the problem is right at the beginning.
Same problem can be said for the exhaust now, but reversed. As you can see in the last picture of the setup, the 2.5" pipe from the cat drops dramatically at basically a right-angle to 2 1/8" or so. A drop of 15% in pipe size in a matter of a millimeter. What's worse is that replacing my removed resonator is a bit of pipe that I only realised when the car was on the hoist, is 2". So there is a huge 20% drop in pipe size in a matter of about 40cm. A DC2R uses a 2.25" exhaust system stock, and that's a 1.8L, so something tells me 2" for a 2.4L isn't very well-suited.
I originally estimated about a 22kw gain at the wheels with these mods, but thanks to my sorry excuses for a catback and intake I think it's more around the 10kw mark, if that. This, however, isn't a huge problem as it's easily solved. I've already spoken to Hakaan and he's quoted me for a full custom 2.5" catback system that will have less bends than the competitive aftermarket exhausts and cost a fraction of the price.
When the catback, intake and throttle body are all properly done I will definitely get the car dyno'd and take it back to WSID. If I could crack the 135kw atw mark I'd be ecstatic. If I could crack the 14's I'd be trippin' balls :p
Updates with the TSX throttle body coming when it arrives/I put it on
damn that sucks. nothing worse than a ball-less low end on an already ball-less N/A 4
man honestly give the ECU a few more days to adjust, i felt exactly like you when i first got the stuff installed but after a week shit, such a big diff, with the DC sports header and the single outlet titanium exhaust i found it breathes ALOT better in the upper RPM and dam VTEC is so much more noticeable when it kicks in, and the sound at WOT is just scary sometimes with the SRI and exhaust together LOL.
haha im guessing the engine is telling to not leave vtec and stay with the power :p
dont know bout ur fuel econmy when u do that though.....
hahahah nice read liam,
depends mainly on your intake since your running the stock intake still, there is too much limitations on the size and how it's structured, once you get justins intake you will find it different again.
ATM i am assuming your running a drop in K&N in your stock box....
If you drive my car, it does sound very quite to be honest....vtec engaging is pretty quite too.