#1
9th October 2002 - 02:57 AM
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explain to Nvious wut [b][size=15]turbo Lag is ..
-------------------- I am heartless.
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blown13b
Post #3
turbo engines usually run lower compression ratios then n/a engines. so when a turbo is not creating any boost ie. vacumme ,there is not alot of compression to make decent power. so when the turbo pumps up to 0psi that is where the lag stops. lag all depends on turbo size, design etc. thats the best i can really explain it, lags pretty much the feeling before you get pushed back into your seat when it starts boosting. kinda like a 2stroke with its huge powerband!!!! |
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TwinCam16
Post #4
most people raise their compresion on n/a to get more power. on turbo cars u lower the compresion to get more boost, (generally) the lower the compresion ration, the less power it has unless you have boost as well. |
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mAJORD
Post #6
well its not only that Twincam16, but as mentioned earlier the delay (even if u are at over 5500rpm) between wen u floor it and get any power as the turbo spools up, just coz u r in a certain rev range dosn't mean u r automatically on boost. as im sure u know |
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mAJORD
Post #8
lol . well ill be honest and agree i dont think the performance / lag reducing effect of a typical vent to atmosphere bov is anything much. cept on a really high boosting beast. |
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4G63JETT
Post #10
whoever said the BOV doesnt affect lag -IT DOES. In real life testing - I ahve found it actually helps - what used to happen before I ran a BOV (starions dont even have a stock plumbed back BOV) say i was in 2nd gear - on 10 psi boost and went to shift- the excess pressure slows the turbing down a few 1000 rpm, and as soons as im back on the throttle its back on 6-7 psi and starts to spool up to 10 again. When the BOV was fitted -same situation - 10 psi, gearchange and the boost guage snaps right up instantly to 10 PSI - VERY little loss of boost on the shift. |
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the red krawler
Post #11
Bzzt, wrong. The blow off valve (wether it be plumb back or atmo vent) is to stop the turbine "stalling" (tho it hardly stalls, its still doing like 50,000rpm). More turbine rpm during a change == less time to spool up in the next gear. AFAIK its a double edged sword (performance gains + not-fucking-your-equipment gains). |
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the red krawler
Post #12
[quote]If you were to run no bov at all what happens on gear changes is the turbin actually tries to spin backwards and sometimes it does and this is really bad for your turbo. |
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Hoon
Post #13
*ahem* |
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Hoon
Post #15
*ahem* |
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Hoon
Post #18
Multitude of things. LAN Admin, WAN Admin, Network Security, Design Engineer and all round think-tank. Basically I'm the Uber-Geek with a fetish for cars.
Why Thankyou. As a side note, N20 is an excellent and cheap source for eliminating turbo lag. But I'll tell you about that another time. |
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Post #20
lag isnt that bad. infact i may go out on a limb here and say it is your friend. |
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