58mm tb
Thread Starter
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
58mm tb
Holley only makes 58mm TB's now. They discontinued their 52mm. What harm would a 58mm TB do on a mostly stock TPI motor, with cat-back ?
I have 21lb accel injectors, and a cat back. The oem TB is worn out. I don't like the BBK logo on their new 52. I'd rather get the Holly and install my own top plate.
Any for seeable problems running a 58TB on a mostly stock motor? The MAF measures the air, the o2 measures the mixture. If any thing I feel the ECM will adjust. What say you?
I have 21lb accel injectors, and a cat back. The oem TB is worn out. I don't like the BBK logo on their new 52. I'd rather get the Holly and install my own top plate.
Any for seeable problems running a 58TB on a mostly stock motor? The MAF measures the air, the o2 measures the mixture. If any thing I feel the ECM will adjust. What say you?
Melting Slicks
Joined: Feb 2015
Posts: 2,069
Likes: 262
From: Park Ridge New Jersey
Holley only makes 58mm TB's now. They discontinued their 52mm. What harm would a 58mm TB do on a mostly stock TPI motor, with cat-back ?
I have 21lb accel injectors, and a cat back. The oem TB is worn out. I don't like the BBK logo on their new 52. I'd rather get the Holly and install my own top plate.
Any for seeable problems running a 58TB on a mostly stock motor? The MAF measures the air, the o2 measures the mixture. If any thing I feel the ECM will adjust. What say you?
I have 21lb accel injectors, and a cat back. The oem TB is worn out. I don't like the BBK logo on their new 52. I'd rather get the Holly and install my own top plate.
Any for seeable problems running a 58TB on a mostly stock motor? The MAF measures the air, the o2 measures the mixture. If any thing I feel the ECM will adjust. What say you?
personally I wouldn't spend the money on a stock application. I have a heads & cam package and I'm staying with the 48mm stock unit
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
No harm. It will have more "throttle response", meaning, the engine will have a bigger reaction to small, off-idle throttle inputs b/c the holes are bigger. That is the only down side.
As for "adjusting", there is nothing for the ECM to "adjust to", really. The TB lets air into the engine. Stock one does it, 58 will to, just a bit earlier/quicker.
As for "adjusting", there is nothing for the ECM to "adjust to", really. The TB lets air into the engine. Stock one does it, 58 will to, just a bit earlier/quicker.
Drifting
Joined: Jan 2005
Posts: 1,354
Likes: 325
From: San Antonio Tx
The ECM uses throttle position and throttle position delta to add AE and PE and for other things. . Light acceleration may cause a lean condition because you're getting more air with with less TPS delta. Easily adjusted with a tune but may or may not cause problems with a stock tune.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
The ECM uses throttle position and throttle position delta to add AE and PE and for other things. . Light acceleration may cause a lean condition because you're getting more air with with less TPS delta. Easily adjusted with a tune but may or may not cause problems with a stock tune.
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Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
That's what I was thinking.
Thread Starter
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
The way I see it, more off-idle response. But top end is still limited by the OEM runners. And the ECM is quick enough to correct for any off-idle lean condition. I do plan on trying it.