HELP! Nasty boost spike - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drifter_for_life06 · 12-14-2006, 09:52 AM

Alright guys, i jusst got a Hallman ES manual boost controller. Got it installed and on the dyno at my school. When we set the controller, it went to 11psi and that is where i "locked" the controller at. So now im get on the road and im driving, and !wtf!? boost shoots to 15psi then settles back to 10-11psi. It did that for the first day, then it starts going past 15psi then settling. So my question, why is it doing this? I mean i know spikes of a 1psi or so are sometimes common, but 5-6psi?

Also, the other day when the boost spiked there was a very weird noise and feeling. Almost like a fuel cut or no spark maybe or something? I have no clue.

Anyone with any insight to either of these, please post?

Ryan

orion::S14 · 12-14-2006, 12:03 PM

Where are you getting you boost signal from?

If it's Tee'd off the FPR line or somewhere...then run a dedicated line, NO TEEs.

If it's off the compressor housing or hotpipe...then try a line off the manifold...but again, use a dedicated line.

See what changes.

- Brian

aNskY · 12-14-2006, 04:19 PM

my hd mbc did the same thing when it was hooked up backwards.... lol

drifter_for_life06 · 12-15-2006, 01:18 AM

its hooked up inline between the nipple on my factory coldpipe and the wastegate

12-14-2006, 09:52 AM	#1
drifter_for_life06 Zilvia Addict Join Date: Sep 2005 Location: New Freedom, PA Age: 36 Posts: 775 Trader Rating: (6) Feedback Score: 6 reviews	HELP! Nasty boost spike Alright guys, i jusst got a Hallman ES manual boost controller. Got it installed and on the dyno at my school. When we set the controller, it went to 11psi and that is where i "locked" the controller at. So now im get on the road and im driving, and !wtf!? boost shoots to 15psi then settles back to 10-11psi. It did that for the first day, then it starts going past 15psi then settling. So my question, why is it doing this? I mean i know spikes of a 1psi or so are sometimes common, but 5-6psi? Also, the other day when the boost spiked there was a very weird noise and feeling. Almost like a fuel cut or no spark maybe or something? I have no clue. Anyone with any insight to either of these, please post? Ryan __________________ RPS13: +.020" 2871r 264's AEM EMS http://enjukuracing.com/#_l_4s

12-14-2006, 12:03 PM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Where are you getting you boost signal from? If it's Tee'd off the FPR line or somewhere...then run a dedicated line, NO TEEs. If it's off the compressor housing or hotpipe...then try a line off the manifold...but again, use a dedicated line. See what changes. - Brian __________________ www.KA24DEvelopment.com

12-15-2006, 01:18 AM	#4
drifter_for_life06 Zilvia Addict Join Date: Sep 2005 Location: New Freedom, PA Age: 36 Posts: 775 Trader Rating: (6) Feedback Score: 6 reviews	its hooked up inline between the nipple on my factory coldpipe and the wastegate __________________ RPS13: +.020" 2871r 264's AEM EMS http://enjukuracing.com/#_l_4s

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12-14-2006, 04:19 PM	#3
aNskY Nissanaholic! Join Date: Apr 2005 Location: NY Age: 41 Posts: 1,604 Trader Rating: (10) Feedback Score: 10 reviews	my hd mbc did the same thing when it was hooked up backwards.... lol