intake manifold and throttle body options


JohnOBrien8

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Feb 27, 2012
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As above i have a healthy standard b18c in my Ek9 with a good exhaust manifold and catback, a good intake with cold feed but before I go for a remap I want to know should I upgrade my intake manifold and throttle body?
I currently have standard ITR intake Mani and TB with a thermal manifold gasket, will I see any gains from a 70mm throttle body and say an edelbrock Victor X intake manifold, or is that overkill on a standard B18c?
All opinions welcome, looking to make as much power as I can with standard engine, is there anything else I'm missing?
 
Not worth money mate. Will be fine with those mods and a remap :)
 
Cut and port out the oem body and bore the TB taper out a little further like the spoon one IMHO.

The manifold has some casting marks which you can grind out and tapering the runner openings should help flow.
 
Any
Cut and port out the oem body and bore the TB taper out a little further like the spoon one IMHO.

The manifold has some casting marks which you can grind out and tapering the runner openings should help flow.
Any guides for this, I have the tools to do it but no point in doing it wrong
 
Not worth money mate. Will be fine with those mods and a remap :)
This is what I had heard myself but I wasn't sure and I'm trying to get as much as I can from engine, have a lightened flywheel, 4.7 box etc so next step would be a built engine
 
Look at what endyne do to the skunk 2, there are images on their website on the building a B20 article. Basically though:
Cut the back of the plenum to gain access,
Grind out the runner openings into a more gradual radius,
Smooth the casting marks in the runners,
Weld back together.

For the TB: just get it on a lathe and bore the current taper out to be as wide at the intake side as you can. Then match the plenum side to the plenum or bore the plenum slightly larger (look up anti-reversion steps).

I'll try and find pics of mine.
 
I've got a skunk 2 manifold and 70mm throttle body on my b16b and I noticed a lot of difference.
Was mapped by Romain, I asked him about the TB and he said its on the border of being too big, 68mm is advisable. But he said not to worry cause I'll probably loose power.
 
vixtor x is more for a built engine that wants a power band high in the rpm range.
You could get a set of drop in cams for the same money and see a nice little gain from them
 
I did the skunk 2 inlet and 68mm throttle body on my dc2 and the throttle felt sharper, but power only went up 4-5bhp. The ported oem mani and counter bored TB lost nothing to the skunk 2 IMHO but had better driveability.

I'm porting a skunk 2 for my civic!
 
Skunk2 ultra street and 68-70mm TB if u have good breathing/exhaust mods already works perfect and gives good gains over stock ITR tb/mani
Regards Carsten
 
vixtor x is more for a built engine that wants a power band high in the rpm range.
You could get a set of drop in cams for the same money and see a nice little gain from them
What sort of can could I use with my standard compression? To get good gains
 
I've read about this and searched this forum and others countless times , and everytime I have read that the 70mm is way too big for the stock internal B series so I've decided to stay stock.

I was told by my previous tuner that the ITR manifold is excellent for a stock setup, again no internal work, only manifolds to make any power over it being the Edelbrock Performer X ( I purchased this ) and the Skunk 2 ultra.

Facebook Honda owners will believe bigger is better but it really isn't, you will get the placebo effect of fitting a new part making your car faster but no one had done a back to back comparison.

As said Victor X is either for built / boosted motors or a motor that will be in the high rev range more than low and mid range, performer X is designed for mid range so will lose some power up top but i'd rather go for the mid range for driveability.

This mated up to a 3" intake pipe and a v stack will be a good setup, don't forget a heat shield to keep the heat off the manifold away.

And yes that will be my setup and Romain will be mapping it.

Anyways that's my input , sorry if I went on a bit too much.
 
Cut and port out the oem body and bore the TB taper out a little further like the spoon one IMHO.

The manifold has some casting marks which you can grind out and tapering the runner openings should help flow.

+ 1 with this
 
This is the only pic I can find of my ITR manifold:

h
DSC_0148.jpg


the Skunk 2 I've been a bit more brutal with.
 
This is not a reply to anything I have read here, but a question instead. This is also my first post as a member. Just a little info first...I had a 96 DX coupe MT about 10 years ago, and I loved it. It had a stock engine and transmission setup, but I changed the look of the car to suite me better. I've owned 17 cars in my life, from BMW's to Mazda's to Mercedes, and out of all of the cars I've owned, I regretted selling the Civic the most. So I went on a search for another Civic, and I found a One Owner, Clean Title, 46, 000 Original Mile example. It is red, 2 door, MT, just the cleanest Civic I've ever seen. I bought the car 3 weeks ago and I have started a list of what I want done. But I would like some help, I'm more than capable on my own, but I'm hoping I get in touch with somebody on here who is just as precise and crazy about these cars as I am. I'm also looking for somebody with experience. I have the money, and I now have another pristine platform to build the Civic of my dreams. I hope I get some responses. Thanks for reading.
 
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