Forced Induction Superchargers | Turbochargers | Intercoolers

voltage drops when i go into heavy boost, starts to blow out spark, common?

Thread Tools
 
Search this Thread
 
Old 09-01-2012, 06:30 PM
  #21  
9 Second Club
 
stevieturbo's Avatar
 
Join Date: Nov 2003
Location: Norn Iron
Posts: 13,616
Received 180 Likes on 155 Posts

Default

LS coils have plenty of poke. If you're having to run a gap less than 25thou, something is wrong elsewhere ( or indeed a coil or more could be faulty )
But generally they are very reliable

I have the MSD wires too, and as you say, sometimes they just dont click in nicely. I always persevere until they do click in though, and alwas put some di-electric grease on the boot before putting it on the plug.

The semi-flexi plug end on them is handy. Does the firecore have this, or is it a fixed end ?
Old 09-01-2012, 07:56 PM
  #22  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

yea i wouldnt suspect a coil

im gonna see if the slighlty tighter gaps helped once the weather holds nice
Old 09-01-2012, 11:26 PM
  #23  
FormerVendor
iTrader: (3)
 
Sales@Tick's Avatar
 
Join Date: Feb 2012
Location: Mount Airy, NC
Posts: 7,480
Likes: 0
Received 15 Likes on 10 Posts
Default

Originally Posted by stevieturbo
LS coils have plenty of poke. If you're having to run a gap less than 25thou, something is wrong elsewhere ( or indeed a coil or more could be faulty )
But generally they are very reliable

I have the MSD wires too, and as you say, sometimes they just dont click in nicely. I always persevere until they do click in though, and alwas put some di-electric grease on the boot before putting it on the plug.

The semi-flexi plug end on them is handy. Does the firecore have this, or is it a fixed end ?
I agree about the MSD wires and the coils having plenty juice, but saying that having to run less than 25 thou gap is wrong isn't always going to be true.

On high boost, high cylinder pressure high nitrous use etc. plug gap is very important and having to run a tight gap just comes with that territory.

I run a .024 on 250 shot with B9EFS plugs.
Old 09-02-2012, 12:41 AM
  #24  
TECH Enthusiast
iTrader: (47)
 
FasTimeSS's Avatar
 
Join Date: Jun 2008
Location: DFW
Posts: 741
Likes: 0
Received 1 Like on 1 Post

Default

just get a alternator regulator forget who makes it
Old 09-02-2012, 12:55 AM
  #25  
12 Second Club
iTrader: (3)
 
Redbull87's Avatar
 
Join Date: Nov 2010
Location: Toronto Ontario Canada
Posts: 791
Received 49 Likes on 30 Posts

Default

Upgrade to the truck alternator anyway,its worth doing on any application for the extra 40amps over the stock fbody.
Old 09-02-2012, 02:47 AM
  #26  
FormerVendor
iTrader: (3)
 
Sales@Tick's Avatar
 
Join Date: Feb 2012
Location: Mount Airy, NC
Posts: 7,480
Likes: 0
Received 15 Likes on 10 Posts
Default

I had a Casper voltage booster on my turbo car, it kept the voltage at 15-16v in high boost.
Old 09-02-2012, 10:59 AM
  #27  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

Anyone know where to get one?
Old 09-02-2012, 11:19 AM
  #28  
TECH Addict
iTrader: (28)
 
Cam72aro's Avatar
 
Join Date: Feb 2006
Location: Sugar Land, Tx
Posts: 2,137
Likes: 0
Received 1 Like on 1 Post

Default

Voltage booster is available from several sponsors, it's made by caspers electronics. You can also find it on eBay. Good product.
Old 09-02-2012, 12:10 PM
  #29  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

But I'm sure it will screw my tune. Higher voltage to the pumps. Wouldn't it?
Old 09-02-2012, 12:14 PM
  #30  
TECH Addict
iTrader: (28)
 
Cam72aro's Avatar
 
Join Date: Feb 2006
Location: Sugar Land, Tx
Posts: 2,137
Likes: 0
Received 1 Like on 1 Post

Default

It might richer it up a little, buts it's either that or the current problem.
Old 09-02-2012, 12:29 PM
  #31  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

But after I put the manual tenaioner on there, I didn't see it drop, I will have to log it and see what it gets down to
Old 09-02-2012, 01:48 PM
  #32  
9 Second Club
 
stevieturbo's Avatar
 
Join Date: Nov 2003
Location: Norn Iron
Posts: 13,616
Received 180 Likes on 155 Posts

Default

What dwell time are you running ?

And have you tried another set of coils ?
Old 09-02-2012, 02:06 PM
  #33  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

I will have to cck the dwell, what should it be at?
Old 09-02-2012, 02:16 PM
  #34  
9 Second Club
 
stevieturbo's Avatar
 
Join Date: Nov 2003
Location: Norn Iron
Posts: 13,616
Received 180 Likes on 155 Posts

Default

Originally Posted by Bobsmyuncle
I will have to cck the dwell, what should it be at?
That may vary with actual coil.

I run my early coils with the epoxy back at around 4.5ms. ( I dont use a factory ecu, so not sure what tables you have. )
But it seems around 5ms is the most they will tolerate. Someone more familiar with the factory ecu and tuning software can advise. But it's always worth checking ( because it costs nothing lol )
Old 09-02-2012, 08:07 PM
  #35  
FormerVendor
iTrader: (3)
 
Sales@Tick's Avatar
 
Join Date: Feb 2012
Location: Mount Airy, NC
Posts: 7,480
Likes: 0
Received 15 Likes on 10 Posts
Default

Originally Posted by Bobsmyuncle
Anyone know where to get one?
https://texas-speed.com/p-2382-caspe...lternator.aspx
Old 09-03-2012, 07:23 PM
  #36  
TECH Enthusiast
Thread Starter
iTrader: (32)
 
Bobsmyuncle's Avatar
 
Join Date: Dec 2009
Posts: 692
Likes: 0
Received 0 Likes on 0 Posts
Default

anyone got any other input? i think im gonna try out the truck alt, but im not sure if it will solve the problem, and im not sure it will clear the valve cover.



Quick Reply: voltage drops when i go into heavy boost, starts to blow out spark, common?



All times are GMT -5. The time now is 10:07 PM.