Supercharger or throttle bodies?


S

Speedy_ek9

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Jul 27, 2007
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whats the best to fit on my ek9 and what would i need to uprate????
if some one could give me some pointers on how much it would cost and what i would need, at the mo im going towards throttle bodies
any advise welcome
many thanks
Dean
:thanks:
 
i cant say i know alot about it technically mate but all i ever heard is that the superchargers are easier to bolt on and get running. but the throttle bodies kick ass WHEN set up correctly...so if you have the money and the time to set them up properly thats the way id go...keep it NA :D
 
i personally dont like superchargers on vtec engines, if you look at this thread i explain why: http://www.ek9.org/forum/engine/150...ochargers-thread-pros-cons-all-explained.html

now i dont really like thorttle bodies either, a properly matched intake manifold can make the same top-end power with more mid-range, a lot of people in usa are taking off there ITB's and running custom intake manifolds and are reporting more power, also itb's dont really make any power unless there on a highly modified engine with a stand alone EMS.

if turbo is not an option (my personal favorite) i would say build your motor first: cams/raise compression/port head/etc... then if you really want itb's get them.
 
blinx9900 said:
i personally dont like superchargers on vtec engines, if you look at this thread i explain why: http://www.ek9.org/forum/engine/150...ochargers-thread-pros-cons-all-explained.html

now i dont really like thorttle bodies either, a properly matched intake manifold can make the same top-end power with more mid-range, a lot of people in usa are taking off there ITB's and running custom intake manifolds and are reporting more power, also itb's dont really make any power unless there on a highly modified engine with a stand alone EMS.

if turbo is not an option (my personal favorite) i would say build your motor first: cams/raise compression/port head/etc... then if you really want itb's get them.
Click to expand...


But, ITBs with a well made plenum and fed with cold air will beat any intake manifold. Where you want the power just depends on the length of the trumpets. Them main reason people not getting enough results is probally the setup and tuning. Every high performance car uses ITB(GTR, Ferrari, BMW's M division etc etc), its just silly to let it suck hot air in the engine bay, thats why plenums is a MUST for ITB.

speedy_ek9: The only problem is when using ITB, port and polish, cams etc etc is needed to make use of it. And could cost you between 20-50% more of the total cost needed to tune and install a SC. And you won't get power results like you do with boost.

Superchargers are easy bolt ons are sufficient for the street. If your chasing Big power, than go turbo OR just get a real turbo car. I'm not a fan for Turbo'd FF cars, I like them N/A like honda intended. :) Many choices out there :nice:
 
jugbugs you bring up an excellent point, i was referring to just itb's, but a proper itb setup with a plenum is probably the best choice for an NA car :nice:
 
oh, and ITBs are always the last mod on a N/A engine, do the cams etc etc first. Also N/A is very very expensive to tune. If your not that type of guy that likes to play here and there then just bolt on a supercharger, trust me, it's fun. :nice:
 
superchargers ruin whole feel of b16b, youll gain good power/torque top end but not nice everywhere else + ruins throttle response and you can only run very low psi to keep reliability (minimum items such bigger rad and oil cooler needed to keep reliability as well)

itb's not needed until youve done every other aspect of engine and i/m's out there now that perform great and almost as good if not as good s itb's

you need lot of work doing before you need itb's and setting them up tuning takes ages and expensive if done proper
 
ow right i might leave both then, i had a 303.8 bhp starlet gt turbo, and i dont want the upkeep that went into it, i wanted to stay away from turbos, and have been offerd some TB cheep so was going to buy them and then get a apexi power fc, im not sure what to do now lol
 
iceman said:
superchargers ruin whole feel of b16b, youll gain good power/torque top end but not nice everywhere else + ruins throttle response and you can only run very low psi to keep reliability (minimum items such bigger rad and oil cooler needed to keep reliability as well

i had a supercharged ek9,i hardly noticed the vtec as the car pulled from nothing right up to the redline,never felt flat at the bottom of the revs,in fact the power was instant and always there especially at the bottom of the revs as this is where n/a vtec engines feel really flat,i would definitely recommend a supercharger.
also if you lower the compression you can run high boost no problem.
also have you ever heard a supercharged vtec engine,sounds immense.
heres a couple of pics of my old charged ek9's engine.
as jugzbugs says they are great fun!
Click to expand...
 

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thats true, i cant hear vtec on my turbo b16b but i dont care cause the boost is great :nice:
 
Iceman: depends what type of supercharger your getting, centrifugal superchargers can actually maintain that VTEC kick more than a roots type charger. With the centrifugal, it makes the delivery the same as it was but feels like your engine has gained an extra 2 cylinders. :D

Corral: Nice! very nice!! What brand is that? Oh, and I recommend you getting some cold air feed on that roots type charger.
 
I remember asking TODA AUS chief about ITBs and you really won't have any benefit without having a fully built engine with high compression, MASSIVE cams etc. And yes, the Chief said 'its the last thing you do on a N/A engine.' Reason?
Because it's your cams, head, etc etc thats limiting the power of your engine and your stock Type R or aftermarket inlet manifold is already sufficient for most setups. Only when your engine is setup as a race type, and I mean the FULL ON RACING PARTS, tuned till you find that your Inlet manifold is a restriction. Then you'll find that ITB which is also refered as Independant Injection Kit is needed for the application. It's other benefit is that you can SUPER FINE TUNE your fuel mixtures 'per cylinder' as is why it's called 'Individual'

So yeh, unless you have LOADS of $$$$ lying around and want to show off, then go ahead and get it to impress your mates. It's really not needed.


Also he said the sound the ITB is 'DEAFENING' It's so loud that it'll bleed your ears on a stripped out car.
 
Corral: Nice! very nice!! What brand is that? Oh, and I recommend you getting some cold air feed on that roots type charger.[/QUOTE]

it was made by C's,was a full kit ecu etc and was on lowered compression due to big fat head gasket, was not running low boost it had other mods like uprated map sensor etc,was all done in japan before i got it,its gone now:( but has paid for my black rx so it's not all bad:D i do miss it sometimes.
but yeah blinx advised on stuff like the roots style charger needing intercooled.
 
corral said:
Corral: Nice! very nice!! What brand is that? Oh, and I recommend you getting some cold air feed on that roots type charger.
Click to expand...

it was made by C's,was a full kit ecu etc and was on lowered compression due to big fat head gasket, was not running low boost it had other mods like uprated map sensor etc,was all done in japan before i got it,its gone now:( but has paid for my black rx so it's not all bad:D i do miss it sometimes.
but yeah blinx advised on stuff like the roots style charger needing intercooled.[/QUOTE]

Yup, but Intercooling a roots type charger is pretty tricky, thats why they made Twin-screw chargers which are a bit easier, and make massive torque gains to the redline. Out of all the chargers, Centrifugal is the one thats safer and easier to tune, also it offers intercooling setup like a turbo, well it's basically a belt driven turbo. Oh btw, nice RX :nice:
 
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