chrismoose17 Posted September 30, 2005 Share Posted September 30, 2005 what is the most boost a stock turbo on a l28et can handle? Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted September 30, 2005 Share Posted September 30, 2005 done 18psi myself.. thumper has done over 20psi.. 18psi is about MAX though... safely and effeciently (sp?).. mike Quote Link to comment Share on other sites More sharing options...
evildky Posted October 1, 2005 Share Posted October 1, 2005 keep in mind those numbers are with alcohol injection and or intercooler, if it's just the stock J-pipe, 10 psi is the limit Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 1, 2005 Share Posted October 1, 2005 a few have done 13psi with megasquirt and or other standalones with just the j-pipe (no fmic).. all i had was a fmic.. no alky. mike Quote Link to comment Share on other sites More sharing options...
Guest 73Turbo240z Posted October 1, 2005 Share Posted October 1, 2005 what is the most boost a stock turbo on a l28et can handle? what they said... or till the block says "f*ck it".... Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 2, 2005 Share Posted October 2, 2005 Hate to be the one to raise the obvious point, but why would you? I don't think the std turbo would be pumping anything but heat at 18psi. Do it properly, or do us a favour, and don't tell us about it. Dave Quote Link to comment Share on other sites More sharing options...
EZ-E Posted October 2, 2005 Share Posted October 2, 2005 I was under the same impression, that once over 15 psi the stock turbo is at its limit as far as producing any real power anymore thats useable and well safe. Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 2, 2005 Share Posted October 2, 2005 jersey has been running 18psi on his T3 for over a year now and it keeps getting faster and faster. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 3, 2005 Share Posted October 3, 2005 jersey has been running 18psi on his T3 for over a year now and it keeps getting faster and faster. mike Oh, well forget I spoke. Thats clearly good evidence. Quick everyone, unplug those wastegate lines, or better, weld them shut! Heaps faster. Dave Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 3, 2005 Share Posted October 3, 2005 hey man u dont have to be a dick about it but im just saying that its been done and pretty much everybody on this forum said 18psi is max to run on a stock T3. anything more and its just blowing hot air. 18psi set on from a roll is around 15-17psi off the line. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 3, 2005 Share Posted October 3, 2005 Mike, Sorry dude. Just like to be clear about what you're recommending. Don't really understand what you're saying about 18psi vs 15-17psi? Dave Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted October 3, 2005 Share Posted October 3, 2005 Easy Mike Perhaps a little sarcastic, but reading between the lines, he has a valid point. People have run that high a boost on the stock T3. Jersey is a good example. Thumper has gone through a handful of turbos running that much boost for an extended period. I think the idea is that we shouldn't be recommending that people run 18 psi onthe stock T3. I would recommend no more than 15 psi on the stocker. Any more than that, and an upgrade should be in order. Even a compressor side from a Buick GN would be a relatively inexpensive upgrade. Another thing to consider is that even a T3/T4 hybrid turbo will not necessarily be able to run 18-20 psi for extended periods without a 360* thrust collear. I had to rebuild a T3/T4 hybrid turbo twice before learning that lesson. Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 3, 2005 Share Posted October 3, 2005 if your in the gas and roll onto WOT and you build say 18psi.. if you go WOT with not being in the gas before WOT, then you will build your true boost. did this with thumpers Z and when we dialed in his boost from a dead stop we had it at 15-17psi.. when he was going say 60mph on the highway and layed into it, it would go past 18psi almost near 21psi. Thumper used all junkyard turbos with unknown history on them and ran 18psi+ in most cases. all those turbos were beat to hell when he bought them and he also beat the crap out of his more then most, so i wouldnt use his cases as much as say jerseys... i havent heard of him blowing a turbo yet.... and he is near the 11's on a stock T3. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 3, 2005 Share Posted October 3, 2005 if your in the gas and roll onto WOT and you build say 18psi..if you go WOT with not being in the gas before WOT' date=' then you will build your true boost.[/quote'] Did you mean `If you go WOT with not being in the gas before WOT, then you will NOT build your true boost'? That should definitely not be the case. The wastegate is set to open at a specific pressure, what pressure that occurs at should not change. I think what you're talking about is that a turbo takes TIME to spool up. If you're holding your engine at 3000 the turbine will be spinning a lot faster than if you're sitting there and rev it from idle to 3000 with a quick jab. That make sense? I'd be questioning whether that wastegate was working properly, and whether it hit 18psi early and held it when you were driving along, or was it gradually building the whole time? EBC if you're doing it properly. Dave Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 4, 2005 Share Posted October 4, 2005 on thumpers Z if we were in the gas and then floored it and say it went to 18psi.. then if we were drag racing from a dig, once going threw the gears and then looking at the boost gauge it was a lower boost. that was with a EBC and then also with a reg MBC.. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 4, 2005 Share Posted October 4, 2005 Mike, I'd be questioning whether it hit 18psi early and held it when you were driving along, or was it gradually building the whole time? Very odd stuff. Oh well.. I'm not turbo guru. Dave Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 4, 2005 Share Posted October 4, 2005 well if we set the boost at 18psi off the line, like going WOT all of the sudden and not being on the gas before hand, and then later on did a roll run it would run higher boost.. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 4, 2005 Share Posted October 4, 2005 Thats not what I'm asking. Did the boost level out at at whatever you set it at? Ie, if you set it at 18 from a standing start, how many rpm was it at 18 for? Ie, did it reach 18 at 3500 and stay there til 6000? Or what? Dave Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted October 4, 2005 Share Posted October 4, 2005 yep stayed there, boost never dropped. came on around 3500ish.. held till 6 where we shifted at. mike Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted October 4, 2005 Share Posted October 4, 2005 Wierd. Damn gremlins. Dave Quote Link to comment Share on other sites More sharing options...
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