smaller throttle butterfly

01206 · 12-18-2015, 09:33 PM

I am going to machine throttle body to 62mm, and will keep the old butterfly. so butterfly is 2mm smaller. I know the idle rpm goes higher, and will need to tune ecu. question is anything go wrong more than that?

370Z JT · 12-18-2015, 11:18 PM

Why would not get a new butterfly?

Rusty · 12-19-2015, 01:26 PM

You'll need a new butterflies to match the bore. Otherwise, you'll have a shitload of headaches. You'll have a 1mm gap around the old butterflies. No way the tune that huge air leak out.

synolimit · 12-20-2015, 03:10 AM

The idle will be like 4k haha

12-18-2015, 09:33 PM	#1 (permalink)
01206 Base Member Join Date: Jul 2013 Location: Canada Posts: 25 Drives: 13 370z Rep Power: 11	smaller throttle butterfly I am going to machine throttle body to 62mm, and will keep the old butterfly. so butterfly is 2mm smaller. I know the idle rpm goes higher, and will need to tune ecu. question is anything go wrong more than that?

12-18-2015, 11:18 PM	#2 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	Why would not get a new butterfly? Mandingo and Rusty like this. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

12-19-2015, 01:26 PM	#3 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,865 Drives: 2011 Nismo GM 6M Rep Power: 2684436	You'll need a new butterflies to match the bore. Otherwise, you'll have a shitload of headaches. You'll have a 1mm gap around the old butterflies. No way the tune that huge air leak out. hooey_b likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

12-20-2015, 03:10 AM	#4 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3388	The idle will be like 4k haha hooey_b likes this. __________________ 13 370z-

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