52mm throttle body
11-12-2007, 12:59 AM
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52mm throttle body Does a 52mm TB botl up using stock locations or do you have to fab it up? I heard but I can't rememeber if it was 52 or 58 where fab works begins a little.
11-12-2007, 11:49 AM
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Don't mean to hijack!!!but i was thinking about getting a 52mm to, but with just bolt ons will u benefit from it!! i have heard from some ppl that you can poss. loss low end power???
11-12-2007, 12:36 PM
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I think you can, but I am hopefully getting a cam in the next two months. It probably won't be going on right away either. It needs a litttle clean up cause it is used.
11-12-2007, 03:51 PM
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That said, it won't really do anything with bolt-ons. Better throttle response so the car will "feel" faster, but that's about it.
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11-12-2007, 06:36 PM
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originally posted by nighthawk15
That said, it won't really do anything with bolt-ons. Better throttle response so the car will "feel" faster, but that's about it.
That said, it won't really do anything with bolt-ons. Better throttle response so the car will "feel" faster, but that's about it.
11-12-2007, 06:43 PM
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It is really not needed until you start talking decent size cams and head/cam combos, etc. It doesn't help because your engine simply cannot flow more air than the heads and cam will allow, no matter how big your TB is. Just like how a better intake manifold won't do anything for you under about 500hp.
11-12-2007, 06:43 PM
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It all depends on what you have done. If you can get the extra air out, then it will help. But say you are on stock heads, exhaust, cam, all that good stuff, it is still going to be restricted. Now having other bolt-ons it will help. How much? I don't know, but I guess I will find out soon enough.
11-12-2007, 06:58 PM
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The reason that a larger throttle body can hurt your low end is this: Low end power is significantly dependant on air velocity. When you start opening up the throttle body, your air velocity can drop, if you don't modify the rest of the engine (valvetrain, exhaust) to compensate, then your power under the curve changes to where you lose low end power. Typically, with this loss in low end, the mid-range or high-end RPM power will rise. It's a trade-off.
So, your choice is dependant on how much you want to modify, and what kind of modifications you are going to do. Some people will choose to go with a large throttle body, a big cam, and then a large exhaust. Overall power will rise significantly, and your low end power will probably be lower than stock, but the curve will rise faster than stock, so your car will be significantly faster. Excellent tuning can overcome this trade-off somewhat. Alternatives can include running slight small exhaust tubing to create more backpressure, thus creating more port velocity. It just depends on what you want to do, create a track monster, or a street monster. At the track, high RPM power is great. All in all, huge power, when put to the ground with a great 60 foot, and a ton of high-rpm power, will net great track times, and fun street driving to boot.
I'll stop rambling now.
So, your choice is dependant on how much you want to modify, and what kind of modifications you are going to do. Some people will choose to go with a large throttle body, a big cam, and then a large exhaust. Overall power will rise significantly, and your low end power will probably be lower than stock, but the curve will rise faster than stock, so your car will be significantly faster. Excellent tuning can overcome this trade-off somewhat. Alternatives can include running slight small exhaust tubing to create more backpressure, thus creating more port velocity. It just depends on what you want to do, create a track monster, or a street monster. At the track, high RPM power is great. All in all, huge power, when put to the ground with a great 60 foot, and a ton of high-rpm power, will net great track times, and fun street driving to boot.
I'll stop rambling now.
11-12-2007, 07:06 PM
#12
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The reason that a larger throttle body can hurt your low end is this: Low end power is significantly dependant on air velocity. When you start opening up the throttle body, your air velocity can drop, if you don't modify the rest of the engine (valvetrain, exhaust) to compensate, then your power under the curve changes to where you lose low end power. Typically, with this loss in low end, the mid-range or high-end RPM power will rise. It's a trade-off.
So, your choice is dependant on how much you want to modify, and what kind of modifications you are going to do. Some people will choose to go with a large throttle body, a big cam, and then a large exhaust. Overall power will rise significantly, and your low end power will probably be lower than stock, but the curve will rise faster than stock, so your car will be significantly faster. Excellent tuning can overcome this trade-off somewhat. Alternatives can include running slight small exhaust tubing to create more backpressure, thus creating more port velocity. It just depends on what you want to do, create a track monster, or a street monster. At the track, high RPM power is great. All in all, huge power, when put to the ground with a great 60 foot, and a ton of high-rpm power, will net great track times, and fun street driving to boot.
I'll stop rambling now.
So, your choice is dependant on how much you want to modify, and what kind of modifications you are going to do. Some people will choose to go with a large throttle body, a big cam, and then a large exhaust. Overall power will rise significantly, and your low end power will probably be lower than stock, but the curve will rise faster than stock, so your car will be significantly faster. Excellent tuning can overcome this trade-off somewhat. Alternatives can include running slight small exhaust tubing to create more backpressure, thus creating more port velocity. It just depends on what you want to do, create a track monster, or a street monster. At the track, high RPM power is great. All in all, huge power, when put to the ground with a great 60 foot, and a ton of high-rpm power, will net great track times, and fun street driving to boot.
I'll stop rambling now.
Great explanation, never really thought of that before.
