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i am going to turn the boost up tomorrow. what is the most boost you would recommend on pump gas 92 octane.
i have all the supporting mods stand alone wide band hybrid stage 4 etc. i am running 14 psi right now. i would like to try 20 psi thanks |
depends on a lot of stuff.
what octane? we've got 87-89-91 and 100 at the pump here, anything over 12psi on 91 is just bad news. how well is it tuned? more boost you run the more important all the little stuff becomes going right from 14 to 20, imo isnt a great idea, maybe go 16, 18 and see how it is |
I could never understand this 20psi goal i keep hearing of. People talk of psi like its 1/4 mile times. https://www.nopistons.com/forums/pub...1047683561.gif
How about making the most power the engine can make, safely? |
i am doing the tuning via wideband and haltech
after 7 psi i am running 12 deg ignition advance and an 11.2 to 1 A/F ratio. my gas is 92 octane thanks for your input |
i wouldnt go too much over 12psi without some super duper intercooling/water injection.
well 92... maybe a little more |
i have a huge fmic
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What heat range spark plugs? If you haven't already go a few steps colder. As mike said, take it in steps, don't do a 6psi jump. What compression rotors also? Unfortuneatly you are looking for trouble, not because of the octane, but beacuse you are choking the engine on that turbine side of the turbo...
Nice users name btw, I need to get some more T-shirts from Lockheed. |
Originally Posted by 1Revvin7' post='824889' date='Jun 18 2006, 10:46 AM
What heat range spark plugs? If you haven't already go a few steps colder. As mike said, take it in steps, don't do a 6psi jump. What compression rotors also? Unfortuneatly you are looking for trouble, not because of the octane, but beacuse you are choking the engine on that turbine side of the turbo... Nice users name btw, I need to get some more T-shirts from Lockheed. i am running the stock plugs. where can i get some colder plugs ? NGK? s4 rotors 3 mil seals. what do you mean choking the engine? is my turbo not allowing enough exhaust flow? i believe it has been clipped. it is a bnr stage 4. what are the repercussions of choking my engine good info thanks |
Originally Posted by skunkworks' post='824915' date='Jun 18 2006, 03:41 PM
what are the repercussions of choking my engine good info thanks |
Originally Posted by skunkworks' post='824915' date='Jun 18 2006, 03:41 PM
i am running the stock plugs. where can i get some colder plugs ? NGK? s4 rotors 3 mil seals. what do you mean choking the engine? is my turbo not allowing enough exhaust flow? i believe it has been clipped. it is a bnr stage 4. what are the repercussions of choking my engine good info thanks You can't pack 20psi of **** in a 5 psi bag. The exhaust side of a stock turbo, clipped or not, is too small. Choking the exhaust leads to detonation. Get a full to4. |
This turbo has put down 400 hp. Why is everyone knockin it?
I say run it up till you see the signs that detonation is getting close and back off just a tad. If you have your timing right you know you cant go any futher on pump gas. |
Originally Posted by GMON' post='825035' date='Jun 19 2006, 03:15 PM
This turbo has put down 400 hp. Why is everyone knockin it?
I say run it up till you see the signs that detonation is getting close and back off just a tad. If you have your timing right you know you cant go any futher on pump gas. If i were doing that setup, I would consider doing a divorced wastegate downpipe and maybe an external WG. That might aleviate some of the restriction. A little fabbing, but thats the name of the game. |
Allot of members like 1revvin7, BDC, Max, Myself and others are against hybrid turbos as the stock hot side is far to undersized. The quicker spool in our eyes is not worth it.
Others love them and think quick spool is the highlight. Take your pick. |
Originally Posted by iceblue' post='825159' date='Jun 19 2006, 11:14 PM
Allot of members like 1revvin7, BDC, Max, Myself and others are against hybrid turbos as the stock hot side is far to undersized. The quicker spool in our eyes is not worth it. Others love them and think quick spool is the highlight. Take your pick. on a stockish car, a hybrid is great. |
Originally Posted by iceblue' post='825159' date='Jun 20 2006, 02:14 AM
Allot of members like 1revvin7, BDC, Max, Myself and others are against hybrid turbos as the stock hot side is far to undersized. The quicker spool in our eyes is not worth it.
Others love them and think quick spool is the highlight. Take your pick. Your not saying much for yourself if you need to reference other people to give your post validity. The stock hotside if far too undersized in what applications? All of them? All boost levels? |
I feel its undersized for any kind of real HP numbers... T4 all the way... who needs spool time, lol... nothing good tuning and N2O doesn't fix..
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i thoguht your not really suspsoed to run over 15 psi on the hybrids??
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