home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 04-02-2021, 02:21 PM   #1
JKnuck6
Board Member
 
JKnuck6's Avatar
 
Join Date: Oct 2015
Location: Fort Myers FL
Default Issues with Walbro 450 and "stock" fuel pressure regulator

I have a walbro 450 and a "stock" 4bar fpr from a dodge daytona. I am having SERIOUS issues with drivability 1200-2500rpm. Everything above that is amazing.

It is on microsquirt and a turner has spend hours with it. He is saying the only thing he would put his money on is the fpr. Any help or suggestions?

IS it possible the pump it too much for a stock fuel pressure regulator?

Has anyone adapted an aftermarket FPR (like a Nuke or Aeromotive) to a stock Fuel Rail? Fuel system has been upgraded from to back with e85 safe lines... lost done to the rest of the engine... built bottom end, stage 3 KL cam, microsquirt, arp headstuds, springs, ported in head (intake and exhaust side).
__________________
06 V70R (ipd goodies)
84 245+t (19t)
91 244+t ("63 trim" ebay, 1000cc, microsquirt)
91 940 Turbo (sold)
94 850 Turbo Wagon (sold)
JKnuck6 is offline   Reply With Quote
Old 04-02-2021, 02:25 PM   #2
JohnMc
PV Abuser
 
JohnMc's Avatar
 
Join Date: May 2004
Location: St. Louis
Default

I think a pressure gauge test would provide the answer. See if the pressure is spiking up a bit in low-flow situations. is the return line still the same size? It's possible that's the restriction, but more likely the FPR.
__________________
'63 PV Rat Rod
'93 245 16VT Classic #1141
JohnMc is offline   Reply With Quote
Old 04-02-2021, 04:06 PM   #3
Swedbrick
Board Member
 
Swedbrick's Avatar
 
Join Date: Oct 2016
Location: Netherlands, Source of Grolsch
Default

I adapted one of those chinese adapters with this setup, after a rebuild, as they contain shavings when shipped:




This might also work for you, and is available from several sources (also in AN):
https://shop.klracing.se/sv/artiklar...8mm-slang.html
__________________
Volvo 745 - IPD springs, 25mm/19mm swaybars, K-cam, LH2.4, M90 swap, 3.54 \w racingdiff lsd, track/daily
-------------------------------------------------------------------------------------
I sell LH2.4 Chips for Europe!
Swedbrick is offline   Reply With Quote
Old 04-02-2021, 04:58 PM   #4
JKnuck6
Board Member
 
JKnuck6's Avatar
 
Join Date: Oct 2015
Location: Fort Myers FL
Default

Interesting. I have seen this part you linked me too before. It seems as though I might need to go this route. I would be interested on how to actually test my FPR.
JKnuck6 is offline   Reply With Quote
Old 04-02-2021, 05:34 PM   #5
rb92673
Board Member
 
Join Date: Jan 2017
Location: San Clemente
Default

Quote:
Originally Posted by JKnuck6 View Post
Interesting. I have seen this part you linked me too before. It seems as though I might need to go this route. I would be interested on how to actually test my FPR.
Buy a cheap 1/8 npt fuel pressure sensor off ebay and connect it to your fuel line somewhere. I connected at the banjo bolt on the fuel filter. Then connect to your microsquirt and log it.
rb92673 is offline   Reply With Quote
Old 04-03-2021, 10:52 AM   #6
Dirty Rick
Board Member
 
Dirty Rick's Avatar
 
Join Date: Apr 2013
Location: Cornholio, OR
Default

What are your injector dead times? If the dead times are not set right the injectors can shut off on small squirts.

If you don't know the dead times, google your injector part #?
__________________
I don't know who I am when I am somebody else.
Dirty Rick 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 06:47 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.