Grimsin
New member
Re: N/A Impala,Modded,3.69 gears, 15-60mph vid
So I took my l67 tb off to clean(found out it was still clean lol)
And inspected both tb outlets and uim inlet.
L36 tb

Zzp ported l67

Both are round but the l36 flared out oval at the end, the uim opening is so large even the extra 7mm the ported l67 provides it's still not even close to the size the uim inlet is
Everything will line up nicely, but you may have a restriction there. The opening on the manifold is a large oval shape. L67 tb is a circle. TB spacer has the same shape on both ends. So, according to my research, you have a circle being mated to an oval with no blending.
http://montecarloforum.com/forum/headers-intake-exhaust-13/l67-throttle-body-project-22641/
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So I took my l67 tb off to clean(found out it was still clean lol)
And inspected both tb outlets and uim inlet.
L36 tb

Zzp ported l67

Both are round but the l36 flared out oval at the end, the uim opening is so large even the extra 7mm the ported l67 provides it's still not even close to the size the uim inlet is
