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Underbody braces, turbos and more!

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 Post subject: Please Help me!
PostPosted: Sun Mar 10, 2002 2:26 pm 
Hey everyone, I need some help. I've been running an IHI turbo with intercooler and 450cc injectors with a small problem I hit 6psi at 3500rpm then at 6000rpm it starts climing to about 10-14psi... I think I need a better wastegate anyway my motor has 44,000 km and its stock I want to set the boost at a fixed level what do you think I can max out at 8psi, 9psi, 10psi or more I just want the max safe boost. Thanks for all your help! <p></p><i></i>


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 Post subject: Re: Please Help me!
PostPosted: Sun Mar 10, 2002 3:31 pm 
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Joined: Fri Dec 21, 2001 4:01 am
Posts: 92
Location: Halton Hills
Did J & R put the turbo system in for you? <p></p><i></i>


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 Post subject: Re: Please Help me!
PostPosted: Sun Mar 10, 2002 5:11 pm 
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Senior Swift Guru

Joined: Sun Sep 02, 2001 11:55 am
Posts: 2595
Location: Calgary, Alberta
What kind of boost control are you using? BOV? <p><br><a href="http://www.teamswift.net"><img src="http://members.home.net/2832075173/pics/Swiftafter1c.jpg"></a></img><br>Kyle Jones <b>1989 Suzuki Swift GTi</b><br>Your friendly TeamSwift Op.</p><i></i>


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 Post subject: Boost limit
PostPosted: Mon Mar 11, 2002 2:06 am 
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Joined: Mon Sep 03, 2001 2:44 am
Posts: 348
Location: Perth, Western Australia
You need to let us know a few more things before any suggestions should be given....<br>What sort of engine management are you using to control fuel and timing? <br>Are you running an intercooler?<br>Are you still running standard compression?<br>Is the rest of the fuel system (eg pump) standard? <p></p><i></i>


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 Post subject: ok
PostPosted: Mon Mar 11, 2002 3:17 am 
I have a BOV, intercooler, 450cc injectors stock engine and a stock fuel pump <p></p><i></i>


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 Post subject: Re: ok
PostPosted: Mon Mar 11, 2002 10:24 pm 
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Senior Swift Guru

Joined: Sun Sep 02, 2001 11:55 am
Posts: 2595
Location: Calgary, Alberta
Stolen from elsewhere to save me some time.. not a whole lot of info on your car, but look to these areas for starters.<br><br>"Boost creep is rising boost due to not enough exhaust bypassing the housing. For example, you're set for 13 psi, and when you floor it, you get a quick rise to 13 or 14 psi. But then as rpm's climb, the boost creeps higher and higher: 14, 15, 16, 17, etc. Enlargening the wastegate hole is one cure for boost creep, as you did."<br><br><br>"<br>1) Undersized wastegate valve for application<br>2) Undersized piping to/from wastegate<br>3) Crimped piping to/from wastegate<br>4) Wastegate plumbing turns too tight of radius for proper flow<br>5) Restricted/leaking boost reference line to wastegate<br>6) Improper engine calibration (timing too retarded or fuel too rich)<br>7) Malfunctioning wastegate<br>"<br> <p><br><a href="http://www.teamswift.net"><img src="http://members.home.net/2832075173/pics/Swiftafter1c.jpg"></a></img><br>Kyle Jones <b>1989 Suzuki Swift GTi</b><br>Your friendly TeamSwift Op.</p><i></i>


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 Post subject: Thanks!
PostPosted: Tue Mar 12, 2002 3:52 am 
Thanks for all your help guys but I have one more question what do you think is a safe psi to run my stock engine at? I'm thinking 8 or 10, what do you guys think? <p></p><i></i>


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 Post subject: Re: Thanks!
PostPosted: Tue Mar 12, 2002 6:38 pm 
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Senior Swift Guru

Joined: Sun Sep 02, 2001 11:55 am
Posts: 2595
Location: Calgary, Alberta
Sort of depends how well your turob system is set-up (ignition, fuel). Sustained pressure I'd keep it lower like you say 8 or 10 psi. If you want the occasional romp at higher boost, I'd say go for it as long as you've gotten fuel and the rest taken care of. The higher boost will have it's wear and tear on the drive-train if nothing else.<br><br><br><br> <p><br><a href="http://www.teamswift.net"><img src="http://members.home.net/2832075173/pics/Swiftafter1c.jpg"></a></img><br>Kyle Jones <b>1989 Suzuki Swift GTi</b><br>Your friendly TeamSwift Op.</p><i></i>


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 Post subject: well..
PostPosted: Wed Mar 13, 2002 2:55 am 
Well for fuel all I know is I run 450cc injectors So Im doing ok in the fuel dept. Ignition I have a Ps92 coil and A crane Hi-6, and magnecor 8.5mm wires so b4 I had it set at 6psi but it would creep to 10-15psi and I know thats too much for a stock motor so I think I wanna push it to the limit but be safe and have it last in the long run what do you guys think 10psi ok?? <p></p><i></i>


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 Post subject: BOOST ???
PostPosted: Wed Mar 13, 2002 8:34 am 
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Joined: Mon Sep 03, 2001 2:44 am
Posts: 348
Location: Perth, Western Australia
The stock fuel system can supply fuel to (suitable) injectors for up to 12lbs of boost. After that, not enough fuel can be provided by the pump and lines and your engine leans out. With your setup you say you are using the factory ECU. Your engine will be running super rich down low until your car boosts up and then maybe OK. Without checking with an air/fuel ratio meter you will not know until the damage is done. Your timing is stock! Your car must ping badly on high revs. All turbo conversions need some sort of device to retard the engines timing when the turbo boosts up. On a standard engine with standard compression you risk piston damage if this is not done. The best way to be safe and sure is to dyno the car and see what fuel and timing is doing across all the rev range.<br>With a properly "TUNED" G13B (with intercooler) you can run 12lbs boost with a standard motor. <p></p><i></i>


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 Post subject: Thanks alot!
PostPosted: Wed Mar 13, 2002 1:46 pm 
Thanks for your help, I've noticed when my boost goes 10-15psi my air/fuel meter is just slightly rich so thats great, plus Im intercooled and the engine is retarded a bit so Im glad I didn't blow anything when I was hitting over 12psi but it was only for few seconds during some races, but I think I'll set mine to 10psi at all times just to be in the zone. I'll be happy with that, and once I install an LSD Im sure I'll really feel the power after my tires stop spinning in first and second! <p></p><i></i>


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