TB Size??

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EJ1B18C

EJ1B18C

New Member
I have a skunk 2 Intake Mani. and i would like your opinion on a bigger throttle body, cause i have no clue on what a good size to pick, its going on my B18C Gsr....:confused:

skunk2_intake_manifold.jpg
 
SKunk2 offer's a throttle body matched for their manifolds. You can get both pieces as a package for around $400-$479 on ebay.
 
Blanco said:
Just match it up with what's already there. Though, from the theory standpoint, TB size should be matched to the cam profile.

You've increased volume but decreased velocity, which means a loss of power in the low-to-midrange while gaining a few ponies at peak horsepower.
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How does one match the TB size to the cam profile, Scott?
 
Blanco said:
That, I do not know. What I do know is that the cam profile should be matched to the flow characteristics of the head and then the TB should be matched to the cam profile. That's why I always tell people to ask their head porter what cam profile would be good for their ported heads. :)
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Sort of like the head bone is connected to the neck bone. The neck bone is connected to the back bone theory? :D That works for me. I'll be sure to ask the head porter about this when I take it in. Thanks again.
 
Blanco said:
Exactly. Which is also the basis of the point "you can't expect to hit big numbers by throwing parts at an engine". Engine building is more than just the sum of the parts.

This part of theory requires actual study and years of experience with porting heads and dyno'ing them with different combinations.
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I'm glad you said that, though I wonder if others will pay attention to you on this. I could never just "throw parts" into an engine. Then again, that would make for an interesting fireworks display I'm sure. If I wanted to waste money and just throw it away, I'd ask for your address and send it to the "Blanco fund" in California.

I was going to ask one more question about flowbenching your head, but that would probably be considered thread jacking. Hence, I'll save it for my own thread. :D
 
Blanco said:
Hahaha. Donations are always accepted. :lmao:

Just to clarify for some. When I say "don't throw parts at an engine", what I mean is that you shouldn't just pick a bunch of brand names without thinking about how they're going to work together. Spend a little time, like Luis is doing, and learn about why you want to use a certain part or not. What is the full effect going to be, beyond manufacturer hype? There's a logical path to all of this and making power consists of the best series of compromises for a particular goal.
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Perhaps I should make a donation in your name to the "freakin'geniusesthatliketojustthrowpartsintheirenginesandmakeitgoboom" club. I'm sure it will help many people out there get their car running the RIGHT way after not listening to others advice on how to do things PROPERLY the first time. :D Or I could just make a "help poor ass Blanco get his damn DX running again" fund. :p

I'll tell you what, Scott, as far as the learning part goes, wow...you should see how misinformed I was before in picking parts for my build. I laugh at myself when I look at what I "thought" would be beneficial for my build. I'm glad that I turned out like my father and have the patience to read and research before spending oodles of cash on things I do not need. Then again that could also stem from the fact that I'm a poor ass and don't have oodles of cash to blow around in the first place. haha Either way, just like Blanco stated, I urge everyone to TAKE THEIR TIME and research the parts you want to add to your build. You may be surprised as to what will and will not work towards your specific goals.

With that said, I'm going to go stick a shot of 250 NOS in my car to make it go REALLY fast now. I know it will work on completely stock internals...right? Right? :D:p;) The "boom" I'll hear will be from it breaking the sound barrier, of course.
 
Luis998 said:
How does one match the TB size to the cam profile, Scott?
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well i know this question was for scott but i figured i would help anyways, whether that works or not i dunno lol. if you would truely want to match your cam profile to you throttle body you would have to have your head flow benched which i dunno how much it is but they are hard to find at least in my area. flow benching would tell you how much lift both your exhaust and intake valves would require before the max flow would be reached. then you would by cams with that lift profile. also the flowbench prints out a cfm chart which you could match you tb to. hopefully it helps.. dont ask me where one is lol cuz the only one i know of was at my skool and they wont even let me use it for my head
 
boston-sol77 said:
well i know this question was for scott but i figured i would help anyways, whether that works or not i dunno lol. if you would truely want to match your cam profile to you throttle body you would have to have your head flow benched which i dunno how much it is but they are hard to find at least in my area. flow benching would tell you how much lift both your exhaust and intake valves would require before the max flow would be reached. then you would by cams with that lift profile. also the flowbench prints out a cfm chart which you could match you tb to. hopefully it helps.. dont ask me where one is lol cuz the only one i know of was at my skool and they wont even let me use it for my head
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I asked Scott because usually there's no one else that chimes in. haha Thank you very much. Welcome to the land of your very first REP point. Population, you. :thumbsup:
 
I figure this link may or may not help people out in figuring out TB sizes and what have you. I know that it enlightened me a lot. Enjoy....

Throttle Body Sizes

I tend to find neat little things like this with all the research I do and the kindness of others spreading their knowledge.
 
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