drilling air fittings..?? 300sd - Printable Version +- STD (https://www.superturbodiesel.com/std) +-- Forum: Tuning (https://www.superturbodiesel.com/std/forumdisplay.php?fid=6) +--- Forum: Engine (https://www.superturbodiesel.com/std/forumdisplay.php?fid=7) +--- Thread: drilling air fittings..?? 300sd (/showthread.php?tid=3939) |
drilling air fittings..?? 300sd - cho - 09-21-2012 hi guys I have read from some old std posts that some guys do the drilling of air fittings...to equalize a bit of garret boost? I assume that you (I) have to drill banjo bolt back on manifold and one on alda a 1mm or so, wider and put a bit wider hose..say 4 or 5mm? correct? why I wanna do it....I have a loooong turbo lag and sudden heavy boost thanks cheers ChO . RE: drilling air fittings..?? 300sd - aaa - 09-21-2012 I don't think it would alleviate the lag. It would alleviate the suddenness though. Have you looked into the higher stall torque converter? Might help with lag. RE: drilling air fittings..?? 300sd - cho - 09-21-2012 (09-21-2012, 08:08 AM)aaa Have you looked into the higher stall torque converter? Might help with lag. thanks, please do elaborate me your last sentence not a english native, so I have problems with eng.tech terms... edit: you suggest installing new torque conv. if I understand you correctly..? . RE: drilling air fittings..?? 300sd - aaa - 09-21-2012 The 1985 torque converter had a higher stall speed, allowing the engine to reach higher rpm faster, which will lessen the lag. RE: drilling air fittings..?? 300sd - cho - 09-21-2012 . ok,got it thanks mate . RE: drilling air fittings..?? 300sd - Simpler=Better - 09-21-2012 Check your ALDA lines as well-they may be dirty and partially clogged, or Adjust / remove the ALDA so that the fueling curve is a bit smoother RE: drilling air fittings..?? 300sd - cho - 09-21-2012 already did , banjo's & lines are fine and clean... I'm thinking of ALDA removal but some guys reported significant fuel consumption issues... well,... no win win here I guess ... tx . RE: drilling air fittings..?? 300sd - Simpler=Better - 09-21-2012 Significant fuel usage if you always mash the pedal A small, GENTLE adjustment may help you RE: drilling air fittings..?? 300sd - willbhere4u - 09-21-2012 Try adjusting the ALDA It only affects off boost fueling RE: drilling air fittings..?? 300sd - cho - 09-24-2012 thanks guys,.. ALDA has been already adjusted also..."until smoke appears" a year back.... basically I don't have a weak power problem,...... sudden (power) boost is issue I would like to resolve some KKK turbo might help . RE: drilling air fittings..?? 300sd - cho - 10-11-2012 I just found this one considering lag: A downpipe with a smaller inner diameter offers less airflow, slightly reducing top-end horsepower. However, the smaller pipe diameter increases the speed of exhaust flow, thus allowing your turbocharger to spool faster, increasing response and low-end power. is this true? how to do calculation how much HP I will lose with 2 inch pipe instead 2.5 inch which I have now? beers ChO . RE: drilling air fittings..?? 300sd - Simpler=Better - 10-11-2012 I would keep the 2.5" downpipe. Do you have a boost gauge installed? RE: drilling air fittings..?? 300sd - cho - 10-11-2012 (10-11-2012, 10:09 AM)Simpler=Better I would keep the 2.5" downpipe. Do you have a boost gauge installed? have one 5 bar 1st class rated, not installed yet....will tee soon if above theory is correct I might consider 2 inch with muffler only I dont use top speed anyway... so 5 or even 10 mph lost is ok.. edit: kind a funny post on superturbo diesel forum )) . RE: drilling air fittings..?? 300sd - winmutt - 10-11-2012 Turn your ALDA out a bit. |