Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk

Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


Reply
 
Thread Tools Display Modes
Old 12-03-2017, 06:05 PM   #1
oLemurs
Zilvia Member
 
oLemurs's Avatar
 
Join Date: Aug 2017
Location: MO
Posts: 197
Trader Rating: (0)
oLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura about
Feedback Score: 0 reviews
boost leak?

So i am having this issue with my sr20 where it only makes around 1 or 2 pounds of boost at around 4000 rpm and i was wondering if its because i have a boost leak. ill link the video im also curious if a boost leak would have the same effect as a vacuum leak meaning it sounds cammed when the engine is warm
https://youtu.be/hLVBrDx3DwU
oLemurs is offline   Reply With Quote
Sponsored Links
Old 12-03-2017, 06:23 PM   #2
e1_griego
Premium Member
 
e1_griego's Avatar
 
Join Date: Sep 2004
Location: Independence, Ore.
Age: 36
Posts: 2,642
Trader Rating: (24)
e1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond repute
Feedback Score: 24 reviews
Your boost gauge is hooked up pre-throttle body so you should change that so you can get a vacuum reading with the throttle plate closed.

Your car isn't going to make boost just free-revving.
e1_griego is offline   Reply With Quote
Old 12-03-2017, 07:09 PM   #3
unicoder
Zilvia Member
 
unicoder's Avatar
 
Join Date: Apr 2017
Location: Alabama
Posts: 160
Trader Rating: (2)
unicoder is an unknown quantity at this point
Feedback Score: 2 reviews
You are only running about 10inHg on vaccum, should be more like 20-22. I would definitely say you have a boost leak.

- you arent going to make any boost sitting idle, gotta drive it to do that.
- Is your MAF setup draw through or blowthrough?
- are you familiar with how to do a boost leak test?
__________________

5.3 V8 Swap w/ Nitrous
unicoder is offline   Reply With Quote
Old 12-03-2017, 08:54 PM   #4
oLemurs
Zilvia Member
 
oLemurs's Avatar
 
Join Date: Aug 2017
Location: MO
Posts: 197
Trader Rating: (0)
oLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura about
Feedback Score: 0 reviews
Quote:
Originally Posted by unicoder View Post
You are only running about 10inHg on vaccum, should be more like 20-22. I would definitely say you have a boost leak.

- you arent going to make any boost sitting idle, gotta drive it to do that.
- Is your MAF setup draw through or blowthrough?
- are you familiar with how to do a boost leak test?
im not sure if it is draw thgough or blow through, but here is what the intake looks like. i do not have the supplies to do a boost leak test yet but i should probably buy them
https://imgur.com/gallery/Zg2Y5
oLemurs is offline   Reply With Quote
Old 12-03-2017, 09:11 PM   #5
oLemurs
Zilvia Member
 
oLemurs's Avatar
 
Join Date: Aug 2017
Location: MO
Posts: 197
Trader Rating: (0)
oLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura about
Feedback Score: 0 reviews
Quote:
Originally Posted by e1_griego View Post
Your boost gauge is hooked up pre-throttle body so you should change that so you can get a vacuum reading with the throttle plate closed.

Your car isn't going to make boost just free-revving.
i hooked it up to where the egr was, also thanks for letting me know it wont make boost out of gear
oLemurs is offline   Reply With Quote
Old 12-03-2017, 09:50 PM   #6
unicoder
Zilvia Member
 
unicoder's Avatar
 
Join Date: Apr 2017
Location: Alabama
Posts: 160
Trader Rating: (2)
unicoder is an unknown quantity at this point
Feedback Score: 2 reviews
Quote:
Originally Posted by oLemurs View Post
im not sure if it is draw thgough or blow through, but here is what the intake looks like. i do not have the supplies to do a boost leak test yet but i should probably buy them
https://imgur.com/gallery/Zg2Y5
It's draw through, since your MAF is before the turbo.

Always start with the boost leak test, it will save you hours of headaches
__________________

5.3 V8 Swap w/ Nitrous
unicoder is offline   Reply With Quote
Old 12-03-2017, 10:37 PM   #7
oLemurs
Zilvia Member
 
oLemurs's Avatar
 
Join Date: Aug 2017
Location: MO
Posts: 197
Trader Rating: (0)
oLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura aboutoLemurs has a spectacular aura about
Feedback Score: 0 reviews
Quote:
Originally Posted by unicoder View Post
It's draw through, since your MAF is before the turbo.

Always start with the boost leak test, it will save you hours of headaches
got it, just ordered a bunch of stuff for the test
oLemurs is offline   Reply With Quote
Old 12-05-2017, 05:47 AM   #8
cotbu
Post Whore!
 
cotbu's Avatar
 
Join Date: Sep 2005
Location: SWFL
Age: 47
Posts: 3,318
Trader Rating: (3)
cotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nice
Feedback Score: 3 reviews
No boost with no load unless you have launch control / antilag

Sent from my LG-H631 using Tapatalk
__________________

LoverTechnologies "Half Broken Things!"
cotbu is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 04:14 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™