Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Technical BBS > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum

Reply
 
LinkBack Thread Tools Rating: Thread Rating: 1 votes, 5.00 average.
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:07 PM
  Pelican Parts Technical Article Directory    Reply With Quote #261 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:08 PM
  Pelican Parts Technical Article Directory    Reply With Quote #262 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:09 PM
  Pelican Parts Technical Article Directory    Reply With Quote #263 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:10 PM
  Pelican Parts Technical Article Directory    Reply With Quote #264 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:11 PM
  Pelican Parts Technical Article Directory    Reply With Quote #265 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage


__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-05-2017, 08:13 PM
  Pelican Parts Technical Article Directory    Reply With Quote #266 (permalink)
 
Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 7,885
I posted between your pics.

I'm using the 3.2 idle valve. I see you're using PWM on the idle valve.

That might be your problem!

With the 3.2, you can use "FIdle", which "closes" the valve (not fully) as the engine warms. There isn't fluctuation during steady head temps. Once "closed" (if you will), it doesn't "open" rapidly to prevent the engine from stalling at idle.

Not sure how PWM idle valves work?

You can see in your datalogs. Does the idle valve open and close rapidly during these oscillations????
Old 07-05-2017, 08:47 PM
  Pelican Parts Technical Article Directory    Reply With Quote #267 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Quote:
Originally Posted by Tippy View Post
I posted between your pics.

I'm using the 3.2 idle valve. I see you're using PWM on the idle valve.

That might be your problem!

With the 3.2, you can use "FIdle", which "closes" the valve (not fully) as the engine warms. There isn't fluctuation during steady head temps. Once "closed" (if you will), it doesn't "open" rapidly to prevent the engine from stalling at idle.

Not sure how PWM idle valves work?

You can see in your datalogs. Does the idle valve open and close rapidly during these oscillations????
Hi Tippy

So for the idle valve I should have it set to on/off? I don't have Fidel as an option. The valve I am using is a Bosch 3 wire unit. I think it came off a BMW.

I will give this a try.

Thanks

J
Old 07-06-2017, 05:13 AM
  Pelican Parts Technical Article Directory    Reply With Quote #268 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Quote:
Originally Posted by Tippy View Post
I see you don't have a specific toothed wheel selected? Are you 60-2 or 36-1?

AFR's around idle and low RPM up to say, 2500, IMO, should be mid-13's*. This will aid lean tip-in and make the engine run smoother.

*You're sequential, so yours will run better than batch at stoch, but using ITB's and speed density is going to make lean tip-in a PITA to get right.
Hi Tippy

Toothed wheel was only option that would allow Dual Wheel with missing tooth.
I will try AFRs mid 13s up to 2500 rpm.

Thanks again.

J
Old 07-06-2017, 05:17 AM
  Pelican Parts Technical Article Directory    Reply With Quote #269 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 7,885
Quote:
Originally Posted by jpilcher View Post
Hi Tippy

Toothed wheel was only option that would allow Dual Wheel with missing tooth.
I will try AFRs mid 13s up to 2500 rpm.

Thanks again.

J
Think of it like this (got this from jpnovak, and he's spot on), in low RPM's, running richer won't use 'that' much more additional fuel, while making lean tip in less of an issue plus (in batch firing cars) smoother running.
Old 07-06-2017, 05:30 AM
  Pelican Parts Technical Article Directory    Reply With Quote #270 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 7,885
Quote:
Originally Posted by jpilcher View Post
Hi Tippy

So for the idle valve I should have it set to on/off? I don't have Fidel as an option. The valve I am using is a Bosch 3 wire unit. I think it came off a BMW.

I will give this a try.

Thanks

J
Turn it off (idle valve) completely and set idle by screws on ITB's just to see if oscillation is from the idle valve rapidly opening/closing.

But, you should see this in the datalogs.
Old 07-06-2017, 05:32 AM
  Pelican Parts Technical Article Directory    Reply With Quote #271 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Quote:
Originally Posted by jpilcher View Post
How do Ignition Maps look keeping in mind I am twin plugged?
Old 07-06-2017, 07:11 AM
  Pelican Parts Technical Article Directory    Reply With Quote #272 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 7,885
IMO, the boost areas are a little high. Everywhere looks pretty decent.
Old 07-06-2017, 07:20 AM
  Pelican Parts Technical Article Directory    Reply With Quote #273 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Should I reduce by 10%?
Old 07-06-2017, 08:10 AM
  Pelican Parts Technical Article Directory    Reply With Quote #274 (permalink)
Puny Bird
 
Mark Henry's Avatar
 
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 3,510
Looking good John.
__________________
'74 Porsche 914, 3.0/6
'67 Bug, 2600cc T4
'67 Bus, 2.0 T1
Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend.
Old 07-06-2017, 08:30 AM
  Pelican Parts Technical Article Directory    Reply With Quote #275 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Thanks Mark, let me know if you are interested in my SDS EFI at all? I will cut you a great deal.
Old 07-06-2017, 08:44 AM
  Pelican Parts Technical Article Directory    Reply With Quote #276 (permalink)
Puny Bird
 
Mark Henry's Avatar
 
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 3,510
Quote:
Originally Posted by jpilcher View Post
Thanks Mark, let me know if you are interested in my SDS EFI at all? I will cut you a great deal.
I still have to get mine up and running on webers and Phillip's twin plug dizzy...so close...it's in, only need a couple of bits.
If I don't like the webers I'll definitely give you a call, but I can't swing it right now.

__________________
'74 Porsche 914, 3.0/6
'67 Bug, 2600cc T4
'67 Bus, 2.0 T1
Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend.
Old 07-06-2017, 08:48 AM
  Pelican Parts Technical Article Directory    Reply With Quote #277 (permalink)
Registered User
 
sjf911's Avatar
 
Join Date: Dec 2006
Location: Idaho
Posts: 5,519
Garage
3-wire idle valve should be a PWM controlled valve, not on/off.
__________________
Steve
Sapere aude
1983 3.4L 911SC turbo. Sold
Old 07-06-2017, 08:48 AM
  Pelican Parts Technical Article Directory    Reply With Quote #278 (permalink)
Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
Posts: 7,885
Quote:
Originally Posted by jpilcher View Post
Should I reduce by 10%?
Sounds pretty good, especially in the peak torque RPM band where detonation is mostly likely will occur.

In that RPM band, pulling a couple of degrees will give it some safety margin.

"GJF" is a tuner and knows these twin-plugs well. Maybe PM him with ignition table?
Old 07-06-2017, 08:51 AM
  Pelican Parts Technical Article Directory    Reply With Quote #279 (permalink)
Registered User
 
Join Date: Mar 2010
Location: Hamilton, On
Posts: 747
Garage
Still having issues with car stalling if I hit the gas to quickly. Wondered if it was the crank sensor.
I have tried to save a Composite Log. It would show for first 5 secs. Then disappear. I'm thinking I need to change laptops.
__________________
1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, PowerHaus Dual Tip Muffler, MS3 Pro EFI conversion, 57lbs. Cobra Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD.
Old 07-06-2017, 04:17 PM
  Pelican Parts Technical Article Directory    Reply With Quote #280 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 06:10 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2016 Pelican Parts - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.