RBC intake advice.using it without kpro

[viggen]

i have topfuel cia and spoon n1 exhaust.and thinking of buying an RBC intake,will my car run ok.or will it run rich or lean.or will it be no use unless its been mapped.ive been offered a new one cheap.but dont want to fit it,if it will damage the engine.thanks

 

[rodney]

Very much doubt she would run lean, you don't have a race header? With only a decent cai,race header,RBC plus exhaust system will you be near running lean (in my experience)

The RBC IMO is pointless without a remap. Have you decent brakes? Have you coilovers/springs with camber arms/bolts with FRS?

I would be spending my money there not a final purchase/tuning item that one would purchase if a remap was very soon in the pipeline.

HTH

 

[MattDC5]

In ran an RBC for a while, 6 months or so, with intake and cat back without mapping and it was fine. I did so on the advice of a well respected DC5 specialist.

 

[sovietspybob]

Yeah it'll be fine aslong as you don't have too many breathing mods, i've got an RBC and a spoon 4-2 but thats it and from what i've seen from when i was messing around with an some ODB2 software i wasn't near running lean.

But you won't get the full benefits of having them fitted although the RBC does give you a noticeable bit more torque mid range even without mapping.

 

[Stoo]

Guys, as much as it's ok to say ' I didn't run lean', 'someone told me it would be ok', most engines are slightly different and to advise him he will be ok is a little off.

My advice is to buy it anyway if it's cheap, keep it to one side and fit it when you get kpro or k100. That way you can be sure you are running safely. Just my 2p

 

[viggen]

thanks for the advice chaps.i think i will buy it and only fit it when i get kpro..will a spoon 4-2-1.be classed as a breathing mod?also whats the differance between kpro and k100.im very new to all of this as you can all tell.thanks again

 

[Stoo]

Yes spoon 4-2 is the top half of the manifold. The 2-1 is the bottom half and this decats it. Definitely a breathing mod.

If I were you, I'd buy the rbc, and spoon 4-2/21 and ten either a k100 or kpro an have it all fitted and mapped at the same time.

The kpro is basically mappable, with a USB socket on the back to plug in a laptop for datalogging and mapping etc.

K100 is the same as a kpro, but without the USB, so no datalogs, and you can't play with the map yourself. Cheaper option is the k100 and it's the best fit and forget choice for a novice

 

[VT-Doo]

Cheaper option is the k100 and it's the best fit and forget choice for a novice

:xyes:

 

[MilanoChris]

You got to love the "I had intake, manifold, header and exhaust without a remap and it ran fine" comments. :roll: :lol:

 

[MattDC5]

But this is a pace for open discussion, no?, where people can 'openly' share their experiences on what 'worked' and what didnt on their car.

Its up to the OP if he takes other forum members advice :?

 

[MilanoChris]

But this is a pace for open discussion, no?, where people can 'openly' share their experiences on what 'worked' and what didnt on their car.

Its up to the OP if he takes other forum members advice :?

My point is that people fit such mods, run them for months on end and because the engine didn't put a rod through the block then it ran fine (according to them and they'll post that on the forum), whereas I bet if they had the AF ratio measured it would have been running lean.

 

[viggen]

i think i will be taking......stoooo's advice

 

[MattDC5]

But this is a pace for open discussion, no?, where people can 'openly' share their experiences on what 'worked' and what didnt on their car.

Its up to the OP if he takes other forum members advice :?

My point is that people fit such mods, run them for months on end and because the engine didn't put a rod through the block then it ran fine (according to them and they'll post that on the forum), whereas I bet if they had the AF ratio measured it would have been running lean.

And a fair point it is.

However, with the mods i had on my car (intake, RBC, catback) it was not running lean.

I took the advice of a well respected DC5 specialist and have dyno run with AF to prove this.

I see nothing wrong with posting this information and it's up to the OP whether he takes it or not.

 

[MilanoChris]

What was the AF and how was it measured?

 

[MattDC5]

What was the AF and how was it measured?

Dont have the specifics to hand, im outside the UK, but was done by Bob at Dyno Dynamics Erith.

If it is of general interest i will get the details and post them up.

 

[MilanoChris]

It is for me, though whether it is for others I don't know. :lol:

Who advised that it would be OK?

It's my personal view that it is risky, and as Stoo says above, every engine is different and will react differently to modifications. I've seen graphs where the AF is running pretty lean, there will be a time when the stock ECU won't be able to cope.

It's like anything, talk to your tuner, read up on forums and make your own mind up.

 

[MattDC5]

It is for me, though whether it is for others I don't know. :lol:

Who advised that it would be OK?

It's my personal view that it is risky, and as Stoo says above, every engine is different and will react differently to modifications. I've seen graphs where the AF is running pretty lean, there will be a time when the stock ECU won't be able to cope.

It's like anything, talk to your tuner, read up on forums and make your own mind up.

Totally agree.

Im sure he wont mind me saying but I was advised by Tom that it wouldn't t be a problem to add an RBC, to my setup, whilst using the OEM ECU.

I'll get the print outs posted for reference.

 

[MilanoChris]

So you were on a stock header that? As that should be fine, though you wouldn't really notice the addition of the RBC till it was mapped.

 

[MattDC5]

Yeah stock header at that point. A Spoon 4-2-1 and Kpro came after that.

Tbh i did notice a difference just with the addition of the RBC without mapping, although there could have been a certain amount of placebo.
On a dyno run with GM, RBC and catback i made just 15 bhp less than a member with similar setup as me but with header, Kpro and a less restrictive exhaust.

 

[MilanoChris]

Fair enough, will be just about fine with stock header but on some cars can be touch and go.