60mm TB

[chris97pittman]

Will I feel any power with a 60mm TB and I've heard that it makes the turboish nose when you shift, that straight up BS?

 

[dr1665]

You will gain a lot of throttle response. You will feel it in the seat of your pants, but with no other signifigant supporting mods, you will actually be lowering the velocity of the incoming air. This means less air overall. Your call.

 

[GSGoinFast]

You will gain a lot of throttle response. You will feel it in the seat of your pants, but with no other signifigant supporting mods, you will actually be lowering the velocity of the incoming air. This means less air overall. Your call.

didnt you see his extensive "speed mod" list?

 

[dr1665]

didnt you see his extensive "speed mod" list?

Niiiiiice.

Seriously Mr. Chris Pittman. If you want to make the car fast, I'd suggest ditching the generic body kit (unless you really, really, want one). If you're not spending that much on the body kit, then you aren't getting a top quality kit that will have a look befitting a DSM. If you'd like to get more than a couple "lame 2hp" gains, I'd suggest you look into a reasonably priced intake (short ram is fine), a GST rear section exhaust, and and under drive pulley from Howell Automotive. Those will do you right. Hell, hack up the OEM air box, drop in a K&N and you can reuse everything when you go turbo but the filter, and you can sell the filter to a no0b to get some beer money.

Just some friendly advice.

 

[DSMJim]

Will I feel any power with a 60mm TB and I've heard that it makes the turboish nose when you shift, that straight up BS?

Turboish noise? LIke a blow off valve? Absolutly no way.

You may see a HP gain but get some other mods to go along with it as well. Your best bet is Nitrous for extra HP. If your afraid of nitrous just run a 35hp shot, that won't hurt anything but will give you a real kick in the pants that I/H/E will never give you.

 

[eclipse13]

intake
catback
header
highflow cat
UDP
55mm TB

I was researching mods a few months ago and 60mm is just too big. Like someone else said, the momentum of the air is slower. 55mm is the way to go until you have alot more mods.

 

[dr1665]

Like someone else said, the momentum of the air is slower. 55mm is the way to go until you have alot more mods.

I said that.

You can't really benefit from the larger diameter unless you can force massive amounts of air past the throttle plate (read: turbo). Remember, if someone is trying to get you to use the "bigger is better" philosophy for building your car, chances are that person is a ####ing idiot. Subtle, well thought out mods, will get you both the most useable gains and value.

 

[GSGoinFast]

Turboish noise? LIke a blow off valve? Absolutly no way.

You may see a HP gain but get some other mods to go along with it as well. Your best bet is Nitrous for extra HP. If your afraid of nitrous just run a 35hp shot, that won't hurt anything but will give you a real kick in the pants that I/H/E will never give you.

i think hes talking about the whistleing noise you get, well at least i got it from my CAI. when i shift, and tap the gas rather quickly when im going into gear, you can hear the tb suck air in with a swooosh sound, perhaps thats what hes talking about.

 

[Doug99RS]

The Jeep throttle body mod will produce a whistle like noise at 2-3 points in the throttle sweep. At times this is similar to a BOV whistle while cruising through a parking lot but is in NO WAY the same as a swoosh heard under heavy acceleration during a shift on turbo cars. I do not have any way to provide a sound byte to prove this but I have been to numerous tuners meets in Va, NC, MD, and other places, LandoAWD can vouche for this as can nearly ANY member who lives in NC. Plus... I'm didn't get put up as a wiseman for telling lies.
Doug

 

[SnoopySLR]

Doug, whats your opinion about the 60mm TB? Do you think its too big? I got one, and love it. I don't see how a smaller one would help performance. I opened my Intake Manifold up to 60mm also, if you don't do that, whats the point of getting a bigger TB at all. My main question is, why would a 55mm TB be better?

 

[Doug99RS]

On an automatic car a throttle body that is too large will destroy the bottom end torque. I've experienced this on mine. Some of it is cam timing but alot is the throttle body. Because the TB is so large it will actually slow down air velocity. If I'm not mistaken, the auto neon TB has the taper in it just before the throttle plate where as the 5spd does not. The taper, though it actually decreases the air path, will speed up the air coming in by creating a venturi affect.

My engine comes to life at 4,000 RPM and higher and a good bit of that is because the engine finally picks up enough speed to start pulling in alot of air. I've swapped back and forth between the Jeep TB, the stocker, and a stocker with the taper ported out (I did the porting and polishing). Out of all of them, the only one that felt like the engine kept pulling at near top speed was the Jeep. With the other two it just felt like I had it on the floor and engine RPM would not increase. Once I broke 100mph that was all she wrote.

Larger TB is ok for manual transmission vehicles but not on autos.
Doug

 

[Justin99RS]

supposedly the correct max size to obtain volumetric efficiency is 55mm....but people have shown steady gains with a 60mm, especially on a turbo car...take it for a grain of salt i guess...either way bigger than 52mm is better...

 

[GSGoinFast]

supposedly the correct max size to obtain volumetric efficiency is 55mm....but people have shown steady gains with a 60mm, especially on a turbo car...take it for a grain of salt i guess...either way bigger than 52mm is better...

of course 60mm will be good with a turbo,its forcing the air in, so you dont have to worry about loosing air velosity due the engine not being able to pull enough air in to fill the space by itself.