anybody know of a non turbo engine mod for fuel economy - page 1 - Non VW Group Diesel - VWDiesel.net The IDI, TDI, and mTDI source.

• anybody know of a non turbo engine mod for fuel economy by prysm on 28 Oct, 2005 03:10
• anybody knows of some simple engine modification for non turbo diesel to improve fuel consumption?
  
  thanks
• #1 by prysm on 28 Oct, 2005 11:26
• thanks for the reply
  
  I am considering the low restriction intake as an initial step in improving fuel economy. I will also try to fabricate an a cold air intake piping with larger input to also act as air scoop.
  
  thanks again
• #2 by zyewdall on 28 Oct, 2005 12:58
• A number of people have put 4" ductwork to the front of the car from the intake on the NA 1.6 VWs.  From what they say, it peps them up a bit over the restrictive stock snorkel, and probably increases mileage a little because of freer breathing.  I'm going to do this on mine when I get it installed (maybe this weekend....?)
• #3 by VWRacer on 29 Oct, 2005 12:20
• Boost your cold tire pressure to the max rating on the sidewall. That alone should give you a couple of MPG.
  
  After doing the cold-air intake and tire pressuremods, the other 'big ticket' item is to openup the exhaust. Put on a set of gas engine headers and a 2 1/2" exhaust with a straight-through low restriction muffler. Diesels have no cam overlap, so don't really 'need' headers, but headers and a bigger pipe reduce backpressure and allow the engine to breath as efficiently as possible.
  
  Those three items alone will give you nearly all the big fuel economy advances you can get. From there it's fine tuning. Advance IP timing to maybe 1.1mm (help me out here, guys!), back off the max fuel screw, etc.
  
  Good luck and keep us advised on how it's going!
• #4 by houseofdiesel on 07 Nov, 2005 13:24
• I ran a cherry bomb muffler (basically no restriction resonator) on stock diameter pipes and set timing to 1.15mm lift. I increased my fuel economy about 25% (best was 900 miles a tank, worst 600 miles in -25C constant after mods) and raised the top speed to 100mph from 80. Stock intake. This car had compression 360-500-500-360 and ran well once the exhaust was openend up, I think the muffler has plugging up from soot due to poor compression and factory spec timing.
  I think a cold air intake via hood scoop would work well, but I was happy enough with the exhaust mods to stop tinkering. I find shifting early helps alot too, if you play enough with the fueling and timing the engines power band seems to be 2000-2500 rpms.
  Greg
• #5 by prysm on 12 Dec, 2005 21:50
• just an update...
  
  The cold air intake was a sucess. You can initially feel the effects during accelaration. fuel economy is a bit better, However I am still trying to figure out the best position for the pipes.
  
  The header, 2.5inch exhaust and a the muffler after asking around needs to be customized and would cost too much right now so I can not impliment it
  
  thanks everyone
  prysm
• #6 by CoastalDefender on 06 Mar, 2010 17:52
• Quote from: prysm on 12 Dec, 2005 21:50

  The header, 2.5inch exhaust and a the muffler after asking around needs to be customized and would cost too much right now so I can not impliment it
  
  thanks everyone
  prysm
  

  Header not changed, but I just replaced my piping and muffler 2.5" from header->out, and the bill was $32USD for the muffler, $95USD installed with new piping.
• #7 by 745 turbogreasel on 08 Mar, 2010 02:46
• Make sure your pump and injectors are like new, add an EGT gauge, and  keep it under 600*.
• #8 by smutts on 05 Jun, 2010 15:27
• Look up transfer pressure, or internal pump pressure.
  
  my best guesses for the 1.6 TD's are as follows...
  36-46psi@1000rpm, 67-75psi@3000rpm, 94-103psi@4500rpm,
  these are engine rpm's. Google "hagar" and "smileage" for how to check the pressures.
• #9 by 8v-of-fury on 10 Jun, 2010 12:16
• gotta love 5 year thread bumps lmao
• #10 by burn_your_money on 10 Jun, 2010 18:48
• Quote from: 8v-of-fury on 10 Jun, 2010 12:16

  gotta love 5 year thread bumps lmao
  

  
  Nothing wrong with that. It makes the search all that much more useful.
• #11 by smutts on 12 Jun, 2010 14:48
• Quote

  gotta love 5 year thread bumps Wink lmao

  Bloody Hell, I fell for it.
• #12 by catlin_cava on 13 Jun, 2010 12:27
• December 12th, 2005 I was rocking a 2002 VW Jetta TDI Drivers Edition in the backwoods of Nova Scotia  What where you doing?
• #13 by Rabbit on Roids on 13 Jun, 2010 12:30
• drivin around a white butt rockin 80's toyota pickup.. 2wd, and lots of mpg. not like a diesel tho.. holy crap, i was 16 too...
• #14 by catlin_cava on 13 Jun, 2010 15:24
• i was in my last year of high school, and was 19 lol