Tips on holding a flat boost curve - w/ single port??
07-10-2007, 03:06 PM
#16
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Originally Posted by eniac
A stock k26/6 can only hold 9-11 psi at redline. Im not sure what a k26/8 can do but I doubt it's much higher. They do peak at 22 or whatever but there is no way you are going to see 18psi at redline with a k26/6, I highly doubt with a 26/8 either. Since you have a single port WG, you can try disconnect the boost controller completely and control boost by the wg spring alone. Keep an eye on boost so you don't break something. Slowly get to the upper RPM before pushing the pedal down. You will see the boost raise then bleed off as you get closer to redline.
If you connect the manifold pressure line directly to the waste gate, you get virtually no boost - the factory WG opens at approx 3 psi.
07-10-2007, 03:22 PM
#17
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Originally Posted by Oddjob
Then Im confused about what you are talking about the diverter/bypass valve building boost and swapping springs in it?
07-10-2007, 03:28 PM
#18
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The k26/8 will definitely hold more than 14 psi at redline. I saw over 30spi (not at redline though) when my Tial failed.
07-10-2007, 03:28 PM
#19
Originally Posted by reno808
On some diverter valve DV/ blow valve BOV you can change the spring inside. You can either stiffen or weaken the spring depending on the amount of boost your running.
07-10-2007, 03:29 PM
#20
Originally Posted by eniac
A stock k26/6 can only hold 9-11 psi at redline. Im not sure what a k26/8 can do but I doubt it's much higher. They do peak at 22 or whatever but there is no way you are going to see 18psi at redline with a k26/6, I highly doubt with a 26/8 either. Since you have a single port WG, you can try disconnect the boost controller completely and control boost by the wg spring alone. Keep an eye on boost so you don't break something. Slowly get to the upper RPM before pushing the pedal down. You will see the boost raise then bleed off as you get closer to redline.
07-10-2007, 03:36 PM
#21
Originally Posted by reno808
Well the wastegate is what allows it to hold boost while the diverter valve is what builds up the boost. You can also play around with different spring settings on the diverter valve. and the EBC is what controls the boost.
07-10-2007, 04:04 PM
#24
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Originally Posted by LFA951
Noooooo
07-10-2007, 04:07 PM
#25
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Originally Posted by reno808
then i have no idea i was only talking about the forge interchangable spring diverter valve.
07-10-2007, 04:55 PM
#28
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Originally Posted by Oddjob
9-11 psi is the stock 217hp boost levels - both the K26/6 and 8 are capable of more than that.
If you connect the manifold pressure line directly to the waste gate, you get virtually no boost - the factory WG opens at approx 3 psi.
If you connect the manifold pressure line directly to the waste gate, you get virtually no boost - the factory WG opens at approx 3 psi.
Again I am not talking about what the stock turbo can spike on your boost guage for a few seconds before you shift or let off. I am talking about what the turbo is capable of sustaining at a high rpm.
07-10-2007, 04:57 PM
#29
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I have the 26/6 and was spiking 26psi and can hold 15psi solid to redline. I think IT HAS held 16psi before when I turned up the boost but that was maxed out on a cold day.
I also have black ***, tial 38 (with 1bar spring), and MAF.
I also have black ***, tial 38 (with 1bar spring), and MAF.
07-10-2007, 05:24 PM
#30
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Originally Posted by JE_951
I have the 26/6 and was spiking 26psi and can hold 15psi solid to redline. I think IT HAS held 16psi before when I turned up the boost but that was maxed out on a cold day.
I also have black ***, tial 38 (with 1bar spring), and MAF.
I also have black ***, tial 38 (with 1bar spring), and MAF.