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Low boost with Smarty

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Old Jan 20, 2009 | 02:46 PM
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From: Ft. Lauderdale-Tampa
Low boost with Smarty

I finally got my Smarty and it is a beast on level 9 and 7. However one thing i noticied is my boost is very low for what it should be. Right now i can only see a max of 28-30psi on a stock turbo. In the past i used to be able to hit 40 with my quad xzt and 38 with smarty jr/bullydog. I see no boost leaks but cant think of another reason my boost is so low. Any ideas? I've tried the Revo with the wastegate on and wastegate off. Also my truck seems to be boosting higher without my holley on and truck on sw7.
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Old Jan 20, 2009 | 03:09 PM
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Check your hoses real good & tighten the clamps. You should be seeing around 40 psi.
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Old Jan 20, 2009 | 03:12 PM
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Hmmm, check for leaks and what are your TQ, TM settings at with the smarty.
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Old Jan 20, 2009 | 03:52 PM
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Higher timing will cause the boost to be lower.
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Old Jan 20, 2009 | 05:30 PM
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I have Tq on 2 and TM on 4. Would the advancement of timing show boost that low? Also temps are the highest i've ever seen that but i am blaming that on smarty on sw9. Or could it be that m running to much timing my truck doesnt seem to sound bad from to much timing..
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Old Jan 20, 2009 | 07:05 PM
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timing 2 or 3 will get your boost back to normal.....timing 3 (aftermarket injectors) will create the most aggressive boost ramp / max ramp....but timing 2 is probably what you want for all around mileage / egts/ boost....

Timing 4 Mileage mode is max timing on Revo and will have the least amount of boost ramp / max boost level.....
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Old Jan 20, 2009 | 08:24 PM
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I don't think it has to do with timing. I've tried all the timing settings...

What happens on my truck is that the wastegate opens at 30psi. You can clearly see it on the boost gauge.

The Quad is boost fooling, allowing your truck to build more boost, because the truck thinks there's less boost than is actually there. I believe the remedy is to stack a pressure box to do boost fooling, or just getting a boost fooler.

Funny, my '03 made more boost than my '07... With a stock turbo that is.
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Old Jan 20, 2009 | 08:49 PM
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Originally Posted by JCLeary
I don't think it has to do with timing. I've tried all the timing settings...

What happens on my truck is that the wastegate opens at 30psi. You can clearly see it on the boost gauge.

The Quad is boost fooling, allowing your truck to build more boost, because the truck thinks there's less boost than is actually there. I believe the remedy is to stack a pressure box to do boost fooling, or just getting a boost fooler.

Funny, my '03 made more boost than my '07... With a stock turbo that is.

I respectfully disagree....now maybe it's just my truck (or model year), but i've had every version of smarty software since the S06 release...including beta's thru TnT/r....and timing plays a big diff with boost...i've never used any external boost fooler...only smarty....and i can see 45+ psi with betas or tnt w ease...

Try Revo on timing 2 vs 3....guarantee 3 spools faster...consistant with other versions too...the betas had "aftermarket injector timing (3 equivalent)" built in and they're the fastest spooling sw release in the smarty lineup....
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Old Jan 20, 2009 | 11:37 PM
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Funny thing but i think he's right the only time i've seen lots of boost basically above 35lbs was when i had an xzt or quad bf plugged in. All of a sudden i wish i had that boost fooler back. However the truck does feel plenty fast its just getting hott. Today was the first time i saw 1400-1500peak. Smarty sr is a beast and i cant beleive ive been messing around all this time for nothing
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Old Jan 21, 2009 | 12:02 AM
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Originally Posted by jgiachino
I respectfully disagree....now maybe it's just my truck (or model year), but i've had every version of smarty software since the S06 release...including beta's thru TnT/r....and timing plays a big diff with boost...i've never used any external boost fooler...only smarty....and i can see 45+ psi with betas or tnt w ease...

Try Revo on timing 2 vs 3....guarantee 3 spools faster...consistant with other versions too...the betas had "aftermarket injector timing (3 equivalent)" built in and they're the fastest spooling sw release in the smarty lineup....
Nope, my truck doesn't care what the timing is on any Smarty tune to date. Smarty will not control the WG on it and no timing chnage will make any difference. With a boost fooler there is little or no difference in boost numbers with timing changes.

If you see boost maxing at 28-30 psi the WG is opening. Period. Stock fueling will create 40 lbs of boost if the WG is controlled correctly, much more with fuel but it is dangerous.

Jiggerman78, just get a Quad boost fooler and put it on there and you will be happy. works much better than the Smarty WG disable anyway as it will start bleeding boost off a 40 psi and not overspeed the turbo.
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Old Jan 21, 2009 | 01:11 AM
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So everyone's saying that the smarty can't boost fool past 30psi by itself and that an external boost fooler is necessary? That just doesnt match my experience at all.
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Old Jan 21, 2009 | 10:18 AM
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I think some trucks are just picky when it comes to spooling the turbo. But from my expierence the only time my truck would spool past 35lbs is with some kind of chip. Thanks for all the help im gunna buy a boost fooler.
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Old Jan 21, 2009 | 11:15 AM
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Originally Posted by jgiachino
So everyone's saying that the smarty can't boost fool past 30psi by itself and that an external boost fooler is necessary? That just doesnt match my experience at all.
There are 2 things here and they need to be seperated for things to make sense. Smarty boost fools to 44-45 psi with no problems, but, all that does is keep the ECU from throwing overboost codes and keep it from defueling. It does NOT control the WG. That is a seperate function.

In order to boost over the factory settings the boost the ECU sees to control the WG must either be modified or it will still open and hold boost at 28-30 psi irregardless of what Smarty says the max value is. On some trucks Smarty works fine andshuts the WG off and it doesn't open, on others it boost fools fine but will not control the WG correctly and you cannot build boost past the stock settings.

Smarty evidently does not modify the signal the ECU sees but remaps the boost tables to allow higher numbers. The problem there is it runs out of entries or something and limits at 45 psi. Since it is controlling the WG it evidently cannot do it with some ECU's for whatever reason. Adding the Quad fooler is actually better as it will start opening the WG at about 37 psi and keep the stock turbo intact. Lock the WG and add enough fuel and you WILL buy a new turbo.
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Old Jan 21, 2009 | 01:48 PM
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lol its definetly the WG i knew something was wrong when i can see the boost fluctuating at WOT. It made me think i had a boost leak but down low my guage held steady. It would open at 30lbs and modify down to 28-29 maybe 30 again, That extra 7-8 lbs of boost can help bring my temps from 1500* right?
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Old Jan 22, 2009 | 02:24 PM
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Originally Posted by no_6_oh_no
Adding the Quad fooler is actually better as it will start opening the WG at about 37 psi and keep the stock turbo intact. Lock the WG and add enough fuel and you WILL buy a new turbo.
The quad fooler is supposed to open the WG at 33-35, but that doesn't make sense as people are seeing over 40 with it... Something doesn't make sense.

To the OP, it appears your WG is opening, like many have said. I can see 35-37psi on stock fueling with the WG off..

I don't recommend going over 33-35psi on a stock turbo with the WG off, drive pressures are well over 60psi.
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