RBC Intake manifold.
- Thread starter Glitch
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DC5 ITR throttle body is the smallest one of K20A/K20A2/K20Z engines... Why would Honda install a larger TB (62mm -> 64mm) on the new FD2 that uses a very similar intake manifold to a RBC? Maybe they wanted to help the engine breathe better...celox performance said:
Don't want to sound negative but i have had same cars on the same rollers on different days and seen a difference of 30bhp due to the weather and higher barometric pressures.Glitch said:
have you tried different rollers?
15bhp is a very impressive figure for the wheels doesn't that translate in something like 22bhp at the flywheel?
Looks like they have also done extra head work (port / polish) from that pic - Wish we had a translated one so we could understand what it's saying!jostrom said:DC5 ITR throttle body is the smallest one of K20A/K20A2/K20Z engines... Why would Honda install a larger TB (62mm -> 64mm) on the new FD2 that uses a very similar intake manifold to a RBC? Maybe they wanted to help the engine breathe better...celox performance said:
Yeah the dyno i was on is measured from the hubs and the barometric pressures were almost identical on both days with a difference in temerature of less than 5 degrees.
People will always be sceptical of high gains including myself which is why i did the before and after test. Also im one of many world wide who has reached the same sort of gains with the RBC. There are quite a few on SuperHonda and Honda-tech with very similar figures.
People will always be sceptical of high gains including myself which is why i did the before and after test. Also im one of many world wide who has reached the same sort of gains with the RBC. There are quite a few on SuperHonda and Honda-tech with very similar figures.
What bonnet damper do you guys use now as i am assuming the normal ones people get for the OEM bonnet, won't be suitable for the lighter carbon fibre bonnets.
Tempted to get one but want to know what i need to get and how much all in. Plus i am using the AEM V2 which may be a problem also.
Cheers
Tempted to get one but want to know what i need to get and how much all in. Plus i am using the AEM V2 which may be a problem also.
Cheers
If think the standard throttle body on the DC5 is 63" (it's been a while since I did all this stuff) The standard ITR inlet manifold matches this. The RBC inlet is certainly 64".raz786 said:
I had my RBC bored out to match my larger J's throttle body and the also the adaptor plate that was required to fit it.
The standard PRC manifold utilises internal velocity stacks and short runners whereas the RBC manifold has short runners and higher flow capabilities.raz786 said:If the standard Inlet is 63mm and the RBC 64mm how on earth does it achieve a 10-15bhp gain on the standard inlet? :? I always get confused with all this technical stuff
The larger inlet doesn't necessarily mean greater flow rate...its what happens after the air has entered that needs to take into account :wink:
Found a good guide to the installation and modification of an RBC:
http://www.karcepts.com/index_files/K-I ... ctions.pdf
http://www.karcepts.com/index_files/K-I ... ctions.pdf
celox performance
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My RBC eventually arrived after over 4 weeks of waiting and had it fitted and mapped at TDI yesterday.
Paul did say that they struggle to get good power figures on the rolling road with some cars fitted with a race LSD, something to do with the way the diff works, but i'm still impressed with the gain anyway
Here are the before & after results:
Before:
After:
Paul did say that they struggle to get good power figures on the rolling road with some cars fitted with a race LSD, something to do with the way the diff works, but i'm still impressed with the gain anyway
Here are the before & after results:
Before:
After: