TB question

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98neon_r/t
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TB question

Post by 98neon_r/t » Tue Nov 11, 2008 7:04 pm

I was on modern performance looking at the TB's that are either 55mm or 60mm....what is stock? And do they really make a big difference, eveing having an ATX?

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INVUJerry
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Post by INVUJerry » Tue Nov 11, 2008 7:38 pm

Stock ATX TB is 52MM. With bolt-ons, you wont get a huge gain on a dyno, but people say it feels better. I would spend your money elsewhere.
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98neon_r/t
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Post by 98neon_r/t » Tue Nov 11, 2008 7:54 pm

Ok thanks.

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Post by 98moparR/T » Fri Nov 21, 2008 3:50 pm

modern doesnt even sell the 55mm anymore so its either 60 or nothing
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Post by Tyler » Fri Nov 21, 2008 4:13 pm

Yea the stock atx tb is 52mm but the stock mtx tb is 49mm. If you have cams or such then get ya a 60mm tb for sure to get the extra air in there. The gains are more top end from what I know.
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Post by DOHCRT » Fri Nov 21, 2008 7:31 pm

I rocked a 60mm even before I turbocharged the engine. I always loved the way the engine would respond compared to the stock TB. It has a lighter throttle spring than stock, which I like as well. If you do get a 60mm, you absolutely have to bore the manifold out to match it. You will probably lose power if you don't.

This should be one of the last bolt-on upgrades you make. Having an ATX, you probably wont feel much of a gain from most bolt-ons. I would probably look into upgrades that will increase low-RPM torque. A good long-tube header with properly sized primaries would be a good starting point.
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98neon_r/t
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Post by 98neon_r/t » Mon Nov 24, 2008 10:05 am

I've been keeping my eyes open for one and reading about them.

My fuel pump went out on me Saturday so I've been running around all weekend looking for one...I got one this morning so hopefully I get time to put in in today

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