home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 03-17-2016, 04:58 PM   #126
gashog
Board Member
 
gashog's Avatar
 
Join Date: Nov 2002
Location: Warwick.NY
Default

Need more ign advance.
You got it to actually fire, advancing the aux shaft 8.5° and the distributor another 20-30°.

Does your rotor point to the mark when your crank is at TDC?


__________________

Here comes the BOOST!
gashog is offline   Reply With Quote
Old 03-17-2016, 05:24 PM   #127
dkrause
Board Member
 
Join Date: Sep 2012
Default

It seems to me you are chasing TOO many things at one time, if possible can you revert to a stock intake / fuel management, then eliminate other potential issues until it is running and then change to your hot new intake and fine tune it.
dkrause is offline   Reply With Quote
Old 03-17-2016, 07:27 PM   #128
LC4CARL
Aero challenged
 
LC4CARL's Avatar
 
Join Date: Sep 2008
Location: Vancouver, WA
Default

__________________


@PDXvolvo on IG
B21FT with a T3/T4, STS coil-overs, T5 trans.
LC4CARL is offline   Reply With Quote
Old 03-17-2016, 08:33 PM   #129
petiww
Board Member
 
petiww's Avatar
 
Join Date: Aug 2011
Location: Hungary
Default

Can you check ignition timing with a strobe light? That thing wants to start, but something is pretty messed up near the timing-ignition side.
It would be also nice to check how strong and definite a spark is. (with a spare plug, pushed against the valve cover with a screwdriver, cranking)
My donor car had nicely burned-together breaker points, resulted in very poor spark strenght and erratic ignition timing. I know your car has breakerless, but who knows how good is it now.
__________________
1980 Brown 244 GL
petiww is offline   Reply With Quote
Old 03-18-2016, 06:58 AM   #130
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

Quote:
Originally Posted by dkrause View Post
It seems to me you are chasing TOO many things at one time, if possible can you revert to a stock intake / fuel management, then eliminate other potential issues until it is running and then change to your hot new intake and fine tune it.
Not sure if serious. There is absolutely no going back to k-jet after all this. The whole point of this build (if you read) is because the stock kjet was not working properly.

When buying a timing light do I get the basic non adjustable one? Or do I get one where you can set the light to a certain degree and adjust towards that?

Last edited by ncbrock; 03-18-2016 at 12:29 PM..
ncbrock is offline   Reply With Quote
Old 03-18-2016, 07:25 AM   #131
oldschoolvolvo
Board Member
 
oldschoolvolvo's Avatar
 
Join Date: Mar 2004
Location: Lancaster, PA
Default

I'd just get the basic one from Harbor Freight. The light isn't super bright, but will get the job done.
http://www.harborfreight.com/xenon-t...ight-3343.html
__________________
-Mike
1998 V70 T5
1979 242 DL 16v

|Feedback|
oldschoolvolvo is offline   Reply With Quote
Old 03-18-2016, 03:04 PM   #132
runslikeapenguin
Board Member
 
Join Date: Sep 2008
Location: Tacoma WA
Default

Quote:
Originally Posted by ncbrock View Post
Not sure if serious. There is absolutely no going back to k-jet after all this. The whole point of this build (if you read) is because the stock kjet was not working properly.

When buying a timing light do I get the basic non adjustable one? Or do I get one where you can set the light to a certain degree and adjust towards that?
Get an adjustable one. It's worth it.
runslikeapenguin is offline   Reply With Quote
Old 03-18-2016, 09:36 PM   #133
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

Quote:
Originally Posted by gashog View Post
Need more ign advance.
You got it to actually fire, advancing the aux shaft 8.5° and the distributor another 20-30°.

Does your rotor point to the mark when your crank is at TDC?


It does point to that mark when the dizzy is turned all the way to the left.

I just bought an adjustable timing light so tomorrow I will troubleshoot and work on it.
ncbrock is offline   Reply With Quote
Old 03-18-2016, 10:03 PM   #134
gashog
Board Member
 
gashog's Avatar
 
Join Date: Nov 2002
Location: Warwick.NY
Default

Quote:
Originally Posted by ncbrock View Post
It does point to that mark when the dizzy is turned all the way to the left.

I just bought an adjustable timing light so tomorrow I will troubleshoot and work on it.
Ok. To make this ignition drama go away, remove the distributor and reinstall it one tooth clockwise. Make sure you get the oil pump drive keyed in.
Set the distributor in the middle of its adjustment.
That should point the rotor at the mark.
Then prime and start.
It should fire right up with no chuffing or backfiring.
Advance base timing about 20* by eye or by feel.

Once you can start it by priming, then figure out why the carbs aren't working.
You may have too much fuel pressure but, first things first.
gashog is offline   Reply With Quote
Old 03-18-2016, 10:06 PM   #135
Redwood Chair
K-jet For Life
 
Redwood Chair's Avatar
 
Join Date: Mar 2007
Location: - Stock PSI Or Bust -
Default

^

Most carbs only want 3 or 4 psi.
__________________
Raise The Lowered


Image hosted by servimg.com

Quote:
Originally Posted by hiperfauto View Post
Folks on here don't know a good deal when they see it.
how psi stock cna sprout?


Redwood Chair is offline   Reply With Quote
Old 03-19-2016, 05:15 PM   #136
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

My pump's MAX output is 3.5psi
ncbrock is offline   Reply With Quote
Old 03-19-2016, 05:47 PM   #137
gashog
Board Member
 
gashog's Avatar
 
Join Date: Nov 2002
Location: Warwick.NY
Default

Quote:
Originally Posted by ncbrock View Post
My pump's MAX output is 3.5psi
Those carbs are gravity feed, no?

Get it to fire all 4 on the prime first.
gashog is offline   Reply With Quote
Old 03-19-2016, 08:05 PM   #138
Hotdoggin
Board Member
 
Hotdoggin's Avatar
 
Join Date: Oct 2014
Location: Tallahassee, FL
Default

How is your return setup, Brock? I've got a theory for ya. Does your return start at the end of the circuit?

****, let me draw a picture. brb.
__________________
1978 245DL - B21 Penta carb powered!
1982 244T - Crushed
1983 245DL - SOLD
1984 244DL - Crushed
1984 245DL - Sitting in someone's yard
1991 740SE - girlfriend's car
2008 S60 2.5T - Money drainer
Hotdoggin is offline   Reply With Quote
Old 03-19-2016, 08:27 PM   #139
Hotdoggin
Board Member
 
Hotdoggin's Avatar
 
Join Date: Oct 2014
Location: Tallahassee, FL
Default

Ok, so if you're set up this way, I suspect your drowning the floats. This is just a theory, because I had similar issue when I was trying to figure out a better way to route my fuel system in my ride. I don't run a fuel pressure regulator whatsoever. So take that as you may. I got the same pump you got, and it works excellent for it's intended purpose.


This is how I'm set up, sans-regulator. Basically the pump fills the carbs, and lines to them, then everything that hits it after that is dumped right back to the tank. since it T's off, the carbs are the final termination point. They always stay full without pushing the full pressure/volume of the pump directly into the carbs because it's just hitting where the junction is and falling into the return line until there is room for more fuel to go toward the carbs. This is how to truly gravity feed in this situation.

Hotdoggin is offline   Reply With Quote
Old 03-20-2016, 06:15 PM   #140
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

Idling on gravity feed, started up no choke, no starting fluid first time. I have to work on my fuel system, for some reason I'm not getting fuel anymore even though my pump is on.

Hotdoggin: My return is on the bottom port on my regulator, not the carbs.
ncbrock is offline   Reply With Quote
Old 03-20-2016, 06:33 PM   #141
VB242
Beep beep zip tang
 
VB242's Avatar
 
Join Date: Sep 2011
Location: The Right Coast
Default

You might want to brace that up, all that jiggling might affect the floats and needles.
__________________
Quote:
Originally Posted by 240240 View Post
I'm shocked someone actually took me seriously.
VB242 is offline   Reply With Quote
Old 03-20-2016, 07:14 PM   #142
petiww
Board Member
 
petiww's Avatar
 
Join Date: Aug 2011
Location: Hungary
Default

^this

But at least it started, idles nicely considering it has four individual carbs.

Also, have you considered going mechanical fuel pump? Just like on my B21A? Or these K-Jet cars don't have a machined cam on the aux shaft? Fuel supply would be pretty easy then, reliable and oem.
petiww is offline   Reply With Quote
Old 03-20-2016, 08:32 PM   #143
lookforjoe
Making Volvo Parts Fit
 
lookforjoe's Avatar
 
Join Date: May 2008
Location: Rockland County, NY
Default

Quote:
Originally Posted by ncbrock View Post
Idling on gravity feed, started up no choke, no starting fluid first time. I have to work on my fuel system, for some reason I'm not getting fuel anymore even though my pump is on.
Nice work!

So..... what was up with the ignition / dist timing? Gonna leave us with no explanation after pages of back & forth over that ??
__________________

My XR July2013 - 446AWHP @ 8K rpm C30 AWD conversion Feedback Thread
lookforjoe is offline   Reply With Quote
Old 03-20-2016, 09:11 PM   #144
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

Quote:
Originally Posted by petiww View Post
^this

But at least it started, idles nicely considering it has four individual carbs.

Also, have you considered going mechanical fuel pump? Just like on my B21A? Or these K-Jet cars don't have a machined cam on the aux shaft? Fuel supply would be pretty easy then, reliable and oem.
I should have done that to start with. It was like $115 for a new one, and I'm pretty sure this thing does have a cam on the aux shaft for the mechanical pump.

Quote:
Originally Posted by lookforjoe View Post
Nice work!

So..... what was up with the ignition / dist timing? Gonna leave us with no explanation after pages of back & forth over that ??
There is no explanation, I bought an adjustable timing light but I haven't touched it since the last video (which is, think, one tooth down from factory setting). Everyone keeps telling me different things about the proper aux shaft location. Now that the car will idle on its own, I'm going to reset the timing to factory greenbook specs (44 teeth down from the cam TDC mark, or the white line on the timing belt) and go from there with my timing light.
ncbrock is offline   Reply With Quote
Old 03-20-2016, 09:37 PM   #145
Hotdoggin
Board Member
 
Hotdoggin's Avatar
 
Join Date: Oct 2014
Location: Tallahassee, FL
Default

Can't wait to hear this thing actually rev.
Hotdoggin is offline   Reply With Quote
Old 03-20-2016, 10:05 PM   #146
gashog
Board Member
 
gashog's Avatar
 
Join Date: Nov 2002
Location: Warwick.NY
Default

Quote:
Originally Posted by ncbrock View Post

There is no explanation, I bought an adjustable timing light but I haven't touched it since the last video (which is, think, one tooth down from factory setting). Everyone keeps telling me different things about the proper aux shaft location. Now that the car will idle on its own, I'm going to reset the timing to factory greenbook specs (44 teeth down from the cam TDC mark, or the white line on the timing belt) and go from there with my timing light.
After you get the aux shaft set, pull your distributor out and set that too.
As far as I can tell from our back and forth, your distributor is in a tooth off.
Good to see it running!
gashog is offline   Reply With Quote
Old 03-21-2016, 01:11 AM   #147
runslikeapenguin
Board Member
 
Join Date: Sep 2008
Location: Tacoma WA
Default

Quote:
Originally Posted by petiww View Post
^this

But at least it started, idles nicely considering it has four individual carbs.

Also, have you considered going mechanical fuel pump? Just like on my B21A? Or these K-Jet cars don't have a machined cam on the aux shaft? Fuel supply would be pretty easy then, reliable and oem.

It's there on the shaft but it's not machined.
runslikeapenguin is offline   Reply With Quote
Old 03-21-2016, 09:47 PM   #148
ncbrock
Board Member
 
ncbrock's Avatar
 
Join Date: Jun 2012
Location: Raleigh, NC
Default

I just a fuel line near the tank, after the pump, and plugged my finger in the line and it started sucking fuel from the tank. So now I have 3 psi of fuel to the regulator and carbs but also now have a leak from old rubber lines back down near the gas tank from the tank to the pump so I need to get some new rubber line.

Also reset the dizzy and int shaft. Waiting on new jets to get here, and will fix that leak in the meantime.
http://youtu.be/LJiXGH2XQ8w
ncbrock is offline   Reply With Quote
Old 03-21-2016, 10:05 PM   #149
gashog
Board Member
 
gashog's Avatar
 
Join Date: Nov 2002
Location: Warwick.NY
Default

Getting close!
She's a little lean but stone cold also.
Get those leaks worked out and let her warm up.
Should be driving soon....right?
gashog is offline   Reply With Quote
Old 03-22-2016, 01:36 PM   #150
Thor
Board Member
 
Thor's Avatar
 
Join Date: Feb 2007
Location: Nebraska
Default

Something else to think about is getting a 4 port mercury stick or Vacuum gauge set so you can balance the carbs. This will improve the idle and the throttle tip in will be nice and smooth once you have things jetted right.

There should be a vacuum port you can plug each line into the then a screw with a lock nut to adjust the vacuum seen at idle. See if you can find the procedure for whatever bike the carbs came off of.
Thor 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 07:14 AM.

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