OK, before everyone tells me why this is a bid idea, just hear me out. My dad and I were talking about fabbing a custom intake manifold, and I suggested that Id go with a bigger throttle and he said" Why not set it up with two stock throttle bodies"? I said "WHAT?" And we begun discussing it. You would have basic straight, short runners, the large box on top, but instead of the TB being mounted on the end, why not mount two on the under side of the of the manifold? Hook them together with adjustable linkage, and have a Y shaped pipe that merges the two TBS together for the intake. Essentially, you would have 1 TB for every two runners, forcing more air into each cylinder. That coupled with a GM 3 1/2" mas, maft, and front mount including the proper IC piping. The piping wouldnt really be much longer than when mounting a normal front mount configuration, and instead of 1 large throttle body mounted where it is, you would have two decent sized TBs pushing air directly into each cylinder. Of course you would have to perform the proper fuel tuning, and The manifold itself and the piping would be somewhat difficult, but Would this be worth while? Will there be a REAL advantage to having the TB's pretty much flowing directly into each intake port? Dont yell at me for this either, but has any one seen the articles with the Hondas running 4 individual Tbs? Same principal in a way, right? Ok, sorry for this being so long, just wondering what every one thought. Does anyone know if this has been tried before? Was it sucessful or not? If you need a better Idea of what I m talking about, I may be able to get some rough sketches of the intake manifold and the configuration. Thanks for reading, Keep Tuning!
Twin Throttle Bodies?
2FastTSiAWD
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142 Posts
OK, before everyone tells me why this is a bid idea, just hear me out. My dad and I were talking about fabbing a custom intake manifold, and I suggested that Id go with a bigger throttle and he said" Why not set it up with two stock throttle bodies"? I said "WHAT?" And we begun discussing it. You would have basic straight, short runners, the large box on top, but instead of the TB being mounted on the end, why not mount two on the under side of the of the manifold? Hook them together with adjustable linkage, and have a Y shaped pipe that merges the two TBS together for the intake. Essentially, you would have 1 TB for every two runners, forcing more air into each cylinder. That coupled with a GM 3 1/2" mas, maft, and front mount including the proper IC piping. The piping wouldnt really be much longer than when mounting a normal front mount configuration, and instead of 1 large throttle body mounted where it is, you would have two decent sized TBs pushing air directly into each cylinder. Of course you would have to perform the proper fuel tuning, and The manifold itself and the piping would be somewhat difficult, but Would this be worth while? Will there be a REAL advantage to having the TB's pretty much flowing directly into each intake port? Dont yell at me for this either, but has any one seen the articles with the Hondas running 4 individual Tbs? Same principal in a way, right? Ok, sorry for this being so long, just wondering what every one thought. Does anyone know if this has been tried before? Was it sucessful or not? If you need a better Idea of what I m talking about, I may be able to get some rough sketches of the intake manifold and the configuration. Thanks for reading, Keep Tuning!
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894 Posts
By putting two throttle bodies on with the existing runner length you would NOT get the same advantages as the 4 throttle body systems.
Those sytems have almost no runners and make alot of horsepower and less torque.
In the day Extreme also had 4 throttle bodies, with almost no runners. Then he went to one large TB with a BIG sheet metal intake canister and ran faster times.
You will run into problems with the IAC, and idle will be an issue.
If you have the tools and ability to build this 2 throttle body system, then you are wasting your time (in my opinion).
Not trying to be a dick, just saying that the 1G throttle body only becomes a burden in the DEEP numbers.
Just build a nice sheetmetal manifold, retain the exsisting TB and cross your fingers. If you are lucky the flow characteristics will be good and you will gain power instead of loosing power.
I see more problems and tuning issues than gains.
If you want more TB, then graph a monster off a mustang or a LS1 onto the intake. Rig up the TPS, and work out the idle bugs.
Those sytems have almost no runners and make alot of horsepower and less torque.
In the day Extreme also had 4 throttle bodies, with almost no runners. Then he went to one large TB with a BIG sheet metal intake canister and ran faster times.
You will run into problems with the IAC, and idle will be an issue.
If you have the tools and ability to build this 2 throttle body system, then you are wasting your time (in my opinion).
Not trying to be a dick, just saying that the 1G throttle body only becomes a burden in the DEEP numbers.
Just build a nice sheetmetal manifold, retain the exsisting TB and cross your fingers. If you are lucky the flow characteristics will be good and you will gain power instead of loosing power.
I see more problems and tuning issues than gains.
If you want more TB, then graph a monster off a mustang or a LS1 onto the intake. Rig up the TPS, and work out the idle bugs.
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614 Posts
Infinity Q45's have an 80mm throttle body. They can make over 1000hp.
I think a lot of people use a Mustang TB and that's all you should need.
I think a lot of people use a Mustang TB and that's all you should need.
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894 Posts
I think the Cobra's sport an 88mm TB. If not they definately make an aftermarket 88mm TB for the mustangs.
Nope, you wouldn't. You could put 8 throttle bodies on the intake - and still get only what flows through the 2.5" intercooler piping. It's like saying that attaching a big funnel to the end of a garden hose will make it flow more water and fill a bucket faster or running 5" tip on 3" exhaust will make it flow better. The 1G TB is very close matched to the typical 2.5" piping - and running any bigger TB doesn't simply make sense unless you run bigger piping at the same time. Even on N/A apllications, it's the size of the intake pipe that dictates the size of the TB. Basically, putting a big lid on a small pipe won't make the pipe flow any better once the lid is taken off.2FastTSiAWD said:
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116 Posts
The M5 uses 8 individual 'throtle body' butterfly valves, but each of these are located at the mouth of every intake port. Like Taboo said, the only real way to make the flow any better at that stage of the piping, would be to increase the flow characteristics at each pipe before that, all the way back to the filter. I just dont see how this 2 TB plan would really be economically logical. But hey, if you've got the time and the $ (which many of us certainly don't) then fabricate to your heart's content and let us know the results .
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142 Posts
Thanks everyone for the input! I guess there were some things that we hadnt thought about at the time, and now I see. But anyways, you never know what new crazy idea a DSMer might comeup with(eh hemmm, MAFT, eh hmmmmm) so just thought I give it a try. Thanks again.
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894 Posts
Hey if every idea was good, then I would be filthy rich.
But you don't ever find the good ones if you don't ponder 1000 stupid or crazy ideas first.
But you don't ever find the good ones if you don't ponder 1000 stupid or crazy ideas first.
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