home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 04-13-2018, 12:12 AM   #26
Dan
TQ>HP
 
Dan's Avatar
 
Join Date: Jun 2002
Location: Superior, Montana
Default

Quote:
Originally Posted by LeedomtoFreedom View Post
Edited my sig, thanks wilford. I like to ask questions
Don't stop asking......
Dan is offline   Reply With Quote
Old 04-13-2018, 12:19 AM   #27
Wilford Brimley
LOCAL ONLY
 
Wilford Brimley's Avatar
 
Join Date: Jun 2008
Location: Lake stevens, wa
Default

Quote:
Originally Posted by Dan View Post
Don't stop asking......
...wat
__________________
96 Grand cherokee, 5.2l badass wheeler

Quote:
Originally Posted by LeedomtoFreedom View Post
I've got a real issue with you Wilford
Wilford Brimley is offline   Reply With Quote
Old 04-13-2018, 03:45 PM   #28
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

I set it all up and drove it today. I think it's restricted because the holes are too small and the air isn't really bypassing quickly enough. It still flutters slightly.
__________________
Quote:
Originally Posted by Wilford Brimley
Holy **** you make a lot of threads
LeedomtoFreedom is offline   Reply With Quote
Old 04-15-2018, 09:20 PM   #29
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

Alright so everything is put together, including the recirc valve, but it still dies on let-off.

I've got IAC connected which makes a good effort to try to save it, but usually fails as it isn't quick enough.

I don't understand why it still dies even after I have the valve set up. I included a picture of my setup, trash talk my garden hose all you want but at 2$ a foot, I can't complain.

I was thinking that maybe the recirculated air is entering too close to the maf? would this matter...? anyway

https://ibb.co/f6tDZ7
LeedomtoFreedom is offline   Reply With Quote
Old 04-15-2018, 11:02 PM   #30
esmth
dirty swede
 
esmth's Avatar
 
Join Date: Jul 2016
Location: Massachusetts
Default

My recirculated air comes in 3 inches from the maf with no issues. I had the same-ish issue when I +t my car, it turns out the way i routed the pcv system, it was creating a slight vacuum leak making my car die on let off. How is yours set up?
__________________
1991 244 +T LH2.4 m46 291k miles with B cam advanced 4*, 962 fuel & 148 ezk, T5 white injectors, 2.5" exhaust w/ magnaflow straight-through & some kaplhenke suspension goodies
esmth is offline   Reply With Quote
Old 04-16-2018, 12:06 AM   #31
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

My pcv is a separate system and doesn't use vacuum currently (been switching between using vacuum and not to see effects). Maybe tomorrow morning I'll boost leak test it and see if there's any leaks.
LeedomtoFreedom is offline   Reply With Quote
Old 04-16-2018, 07:50 AM   #32
FreeEMSFred
Board Member
 
FreeEMSFred's Avatar
 
Join Date: Nov 2009
Location: Kiwiland
Default

I have evo, silvia, subaru, skyline, and GTR BPVs on the shelf here, and have run the GTR up to 18psi (Holset) with zero issues, and without modifying it in the first place. The collection has slowly formed over time so I can put a "leaks at" number on each one with the help of my compressor and some time in the shed. GTR ones have 38mm outlets! More than ample for my Holset HE351CW, or pretty much any turbo, actually. How much (psi) are you going to thrash the Holset/rods/pistons? Or are you worried about outright flow? If the latter, think of it as a serious leak to ensure no serious pressure spike can occur.
FreeEMSFred is offline   Reply With Quote
Old 04-16-2018, 08:24 AM   #33
oldschoolvolvo
Board Member
 
oldschoolvolvo's Avatar
 
Join Date: Mar 2004
Location: Lancaster, PA
Default

Does the car idle normally?

To establish a baseline, I'd disconnect the wastegate actuator and wire the wastegate OPEN (no boost) and see if the engine operates normally on/off throttle. I suspect that there is a vacuum leak somewhere that shows up under high vacuum conditions (off throttle decel).

Also, your recirc valve plumbing has a lot more hose than is really needed. Typically they only connect between the turbo inlet and turbo outlet vs coldside piping.



VS

__________________
-Mike
1998 V70 T5
1979 242 DL+T |Project Thread| |Feedback|
oldschoolvolvo is offline   Reply With Quote
Old 04-17-2018, 07:59 AM   #34
FreeEMSFred
Board Member
 
FreeEMSFred's Avatar
 
Join Date: Nov 2009
Location: Kiwiland
Default

The question is, do you kill the pressure spike at the throttle as it occurs, or at the compressor as it impacts the blades, I'd prefer both. Plumbing isn't too heavy. Good advice re the other diagnostics, though :-)
FreeEMSFred is offline   Reply With Quote
Old 04-19-2018, 11:38 AM   #35
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

I've moved the maf over to the cold side which seems to improve it. BUT

I'm trying to get a bov so I don't have to fuss with this diverter valve any more.

I've been looking at the HKS ssqv (space ship model) because it's a pull type and I remember reading in a different thread that it shouldn't leak at idle causing issues (is this true?)

If it does leak at idle, which seems to happen with a lot of bovs, should I have it before the maf or after ? My thoughts are that if it's after the maf, it'll be a huge vacuum leak and cause lean issues, but before the maf, it should theoretically run the same

Ive been reading up and been finding some wishy washy information on this so humor me.
LeedomtoFreedom is offline   Reply With Quote
Old 04-19-2018, 12:38 PM   #36
oldschoolvolvo
Board Member
 
oldschoolvolvo's Avatar
 
Join Date: Mar 2004
Location: Lancaster, PA
Default

Quote:
Originally Posted by LeedomtoFreedom View Post
I don't care for the choo choo sound and don't want to mess around with stalling.
Quote:
Originally Posted by LeedomtoFreedom View Post
I'm trying to get a bov...


Have you tried a method of taking the turbo boost out of the equation and verifying that your car doesn't have the stalling issue regardless of what kind of bov/recirc valve you use? Is your engine stock otherwise (injectors/chip/cam timing, etc)?
oldschoolvolvo is offline   Reply With Quote
Old 04-19-2018, 12:40 PM   #37
Wilford Brimley
LOCAL ONLY
 
Wilford Brimley's Avatar
 
Join Date: Jun 2008
Location: Lake stevens, wa
Default

I run a genuine greddy type s and it works well
Wilford Brimley is offline   Reply With Quote
Old 04-19-2018, 02:55 PM   #38
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

Does the hks have any adjustment in terms of springs and shims ? I'm guessing not
LeedomtoFreedom is offline   Reply With Quote
Old 04-21-2018, 05:50 AM   #39
JerryJS8
der Junge
 
JerryJS8's Avatar
 
Join Date: Sep 2004
Location: Normal Saxony
Default



You mounted your recirc valve backwards. Flip it and it should work just fine, just kinda worried about that silicone holding under boost...
__________________
- 1987 244 (hand-me-down first car)
- 1990 744 (white with red leather)
- 1992 965 (green with tan leather)
- 1990 744 16v (pegleg drift can)
- 1992 480 (Renault disaster)

- 1989 745 16v
- 1991 744 (SE) 16v Turbo

Quote:
Originally Posted by nordmaschine View Post
Try to recreate and see what happens, our crystall ball servers are currrently down.
JerryJS8 is offline   Reply With Quote
Old 04-21-2018, 11:15 AM   #40
LeedomtoFreedom
Board Member
 
LeedomtoFreedom's Avatar
 
Join Date: Oct 2017
Location: Chicago
Default

Since I've moved the maf, I've done away with the recirc for now. It'll just be a bandaid until I can get a bov so I don't feel like putting it back in.

Quote:
Originally Posted by JerryJS8 View Post
just kinda worried about that silicone holding under boost...
You're very wise to think that, it blew open on the way back from college and I had to run her home with an afr of around 9
LeedomtoFreedom is offline   Reply With Quote
Reply

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 On

Forum Jump


All times are GMT -4. The time now is 08:28 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.