Nissan 370Z Forum - View Single Post - Custom ported and CNC throttle bodies, upper and lower manifolds by Synergy Composite

synolimit · 07-01-2014, 05:04 PM

Ok I did a little research.

The TB lip is 2.81" at its largest. That tells me the Z1 post tube is around that size ID since it has to slip over it. Now its not hard to slip over but it's also not that easy. So I'm going to guess the several inches of the z1 post tube is around 2.7ish inch ID.

Now the OEM MAF section is only 2.54" OD which is why you see a bulge. The post tube is being forced into a smaller size. The silver pipe is 2.5" OD with the same ID of the OEM MAF tube. So forget all pipe before that, I'm running about a foot of 2.35" ID pipe with the MAF sensor in it that then opens up into the post tube that's 2.7ish ID that then goes down into 2.6" (TB opening lip) then 2.48" (right at the butterfly plate and port matched into the manifold) of the TB.

So if I at least replaced the foot of 2.35" ID silver pipe and OEM MAF section with 2.75" OD pipe, not only would it fit pretty well into the z1 post tube but it'd also lower the huge gap (2.35" to 2.7ish" now, to 2.63" to 2.7ish) I have right now.

07-01-2014, 05:04 PM	#216 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3389	Ok I did a little research. The TB lip is 2.81" at its largest. That tells me the Z1 post tube is around that size ID since it has to slip over it. Now its not hard to slip over but it's also not that easy. So I'm going to guess the several inches of the z1 post tube is around 2.7ish inch ID. Now the OEM MAF section is only 2.54" OD which is why you see a bulge. The post tube is being forced into a smaller size. The silver pipe is 2.5" OD with the same ID of the OEM MAF tube. So forget all pipe before that, I'm running about a foot of 2.35" ID pipe with the MAF sensor in it that then opens up into the post tube that's 2.7ish ID that then goes down into 2.6" (TB opening lip) then 2.48" (right at the butterfly plate and port matched into the manifold) of the TB. So if I at least replaced the foot of 2.35" ID silver pipe and OEM MAF section with 2.75" OD pipe, not only would it fit pretty well into the z1 post tube but it'd also lower the huge gap (2.35" to 2.7ish" now, to 2.63" to 2.7ish) I have right now. __________________ 13 370z- Last edited by synolimit; 07-01-2014 at 05:09 PM.