Ek9 itb's fitted by frd


itb's i want some, wazer has a mental ek9 with itbs and wow that thing was loud :nice:
 
hey m8 very nice car and very clean engine bay but whats the reason of putting itbs on ur car if u dont really need them?? with 1k u spent u could get a lot of whp..sry to say but for me it seems the car doesnt accelarate good it takes 2 much time
 
Personally I think everyone is expecting too much from the ITB's. I think these are 42mm which should be about adequate for a stock B16b. I doubt there'll be a very noticeable acceleration improvement on a stock engine, but now he has something which looks good, sounds good and has better throttle response. It's not all about the speed!
 
my mate used the same ITB set up before on his vti ek and made 215bhp and they seem to work well on his and i wanted a intake system so though might as well get itbs for the crack it does make the standard engine alot better but as said before it need retuned

yes i could have got a lot more for what i bought but im happy as its just my toy car the power car is the del sol in first pic 247bhp/190ftlb

and as i have said before the vids dont do it justice it now keeps up with my teg which imo is good goin for a 1.6 with nothing more than exhaust,intake and tune
 
J-Spec said:
WAZER what cold air feed you using
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Using a custom made airbox, fabricated from aluminium that runs into the front bumper.

Pic..

mugen.jpg
 
Does that actually work better than just with a filter? Any dyno's of before and after with the air-box? I'm a bit skeptical.
 
None, but I can - What makes you think this doesn't work, I mean V hot engine bay air (Within 30 ish secs at startup the exhaust manifold becomes too hot to touch lol) Vs cooler air @ the bumper...

Hoping the new cage fit goes well I'll be getting it RR'd - however Taking the cold air feed out will mess with AFR = Could run lean?
 
If you took the cold air feed out that would be less cold air meaning it would run richer.
 
I was thinking along the lines of what you have now created is just a massive intake manifold. A lot of money is spent on the plenum chamber design to ensure that all cylinders receive an equal share and with the trumpets sticking out in a square box I wonder how the air-flow characteristics will be effected to each cylinder amongst other things like pulsing and turbulence.

I'd be interested to see the results of filter vs. air-box. We run the standard Jenvey filter, but I have seen a few cars with custom air boxes on engines mounted the same way as ours - just a shame the B-series wasn't mounted like the K-series with the intake manifold next to the grill.

Edit: Today it was rainy and mild, took the EK9 for a spin and the air temp under the bonnet never reached over 25 degrees according to the ECU. Surely a metal box would mean any air inside would almost be the same as the ambient air under bonnet by conduction and convection, I suspect the air would very quickly heat up once it comes from the bumper and remains in the plenum.
 
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Wazer said:
You definatly need a cold air feed mate, makes sure a difference! You can hear it sucking through the filter too. :naughty:

May I ask tho, These ITB's are from a Cbr1000? Why? - They will be seriously restricting it, as I've found out with my 1600cc itbs..

Other than that, its an absolute stunner! Looks fantasic mate! :drool:
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Taken from jenvys website (imo they are a world leader in itb's):
'It helps to understand the relationship between size and output to consider that a 2L Formula 3 engine produces 200+BHP through a 26mm (531 sq mm) restrictor, whilst, say, a 75mm throttle body is eight times larger at 4,418 sq mm! Similarly, in an experiment to curb the power of 270 BHP touring car engines, we reduced the size of the single throttle body to less than 44mm (1520 sq mm) before there was any noticeable reduction: a 75mm body has three times the flow. '

and:

'Basic references for BHP per cylinder, assuming ca 120mm from butterfly to valve head and a max of 9,000 rpm are;
Up to 30 - 30mm, up to 33 - 32mm, up to 39 - 35mm, up to 46 - 38mm, up to 51 - 40mm, up to 56 - 42mm
Up to 65 - 45mm, up to 74 - 48mm, up to 80 - 50mm, up to 87 - 52mm, up to 93 - 54mm.
These power figures may be increased by up to 10% in a purpose - designed and well proportioned system.
As butterfly to valve distance increases, butterfly size will need to increase in proportion to system taper and vice versa.
Lower revving engines and those with injectors placed before the butterfly will generally accept a larger body. '


What '1600' itbs are you using? i dont know of any sports bikes with 1600 motors. Cbr 1000rr's come with 42mm tapered throttles, more than adequate for a 1.6 b-series. And 224 to 246bhp (10%) ^ sounds ok to me (although that figure can be increased even further due to the taper). Going too big just sacrifices drivability. After the re-map billy managed 14.7 or was it 14.6 i cant remember. At Crail too.
Cold air feeds are good, i advised jacking the bonnet as this helps a great deal but billy hates the look lol. An air box would be good but space is tight and it will deaden some of the noise, which is the main reason for fitting these things in the first place.

Yea, i joined :woot:
 
Dont think so. I never bother with them, its just a number when it comes down to it. his best 1/4 before the throttles was something like 15.6 so its the best part of a second quicker so im happy, as is billy. Im sure he will get it checked one day for what its worth.
The same manifold with the same type of throttles (billy wanted new) on a b16a2 with minimal supporting mods made 202 before i swapped them onto billys, although the dyno was a bit questionable. Also tuned by me. Like i say, i dont bother with dynos. that figure could be well off or it could be bang on, who knows. 1/4 mile times are much better.
 
i race that throttle boddie ek9 at crail it was defo quicker than the other ek9 i race. dont no if it helps giv a guess at power but at 212bhp i got a 14.3 sec
 
FRD Tom said:
Dont think so. I never bother with them, its just a number when it comes down to it. his best 1/4 before the throttles was something like 15.6 so its the best part of a second quicker so im happy, as is billy. Im sure he will get it checked one day for what its worth.
The same manifold with the same type of throttles (billy wanted new) on a b16a2 with minimal supporting mods made 202 before i swapped them onto billys, although the dyno was a bit questionable. Also tuned by me. Like i say, i dont bother with dynos. that figure could be well off or it could be bang on, who knows. 1/4 mile times are much better.
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Debatable, unless every run is done at the same 1/4 mile on the same day.

No one can predict weather etc. And crail is a pish dragstrip.

A dyno run can show the graph and how smooth the power delivery is and comparison to a standard graph will show power in comparison to standard at different points in the revs ie not just peak.

Unless of course your afriad your mapping isnt great and will give a pish power curve :nerv:
 
And then you take it to a different dyno on the same day and get a totally different figue. The runs were taken at the same strip in similar weather conditions.

I knew it, you just cant mention anything about power figures and dynos being unimportant on a forum like this without some keyboard warrior piping in thinking he knows best. My cars always dyno well, fwiw. Do you happen to know its torque that matters, not power? And that even if a car had a not so great 'power curve' on a dyno it could still out-perform a car with a perfect 'power curve' out on the road? Dyno's dont accurately re-produce real world conditions, any reputable tuner will follow up any dyno session with some road/track tuning, dyno's are a time saving device, and something that allows people like you to race your car without ever putting it on a track. Whats the matter? you afraid of racing?:nerv:
 
Aye but track racing doesn't come down to RR printouts because track racing takes into account SO much more than what power you have........ Talking about an ACTUAL track too, 1/4 mile can never be refered to as a track, just a strip

Also matthews car would be a lot faster than this anyways running a well tuned/rebuilt B18C, as good as ITBs are, you are very limited to what output you can achieve when you accompany them with a standard engine with a different exhaust system

Does look like a very tidy install and not trying to have a go by the way, it would be interesting to see the RR printouts to see how flat the torque curve is and where it's producing power up to / the AFR etc
 
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