1.6td engines....

Post by **R0B** » 09 Jun 2006, 16:57

the 1.6td with intercooler is 90hp.the 1.6td without is 68hp.does this extra hp
come from having an intercooler.or is the intercooler there because of the extra hp.and how does an intercooler work.does it need air passing through it
if so.how would this work with a rear engined van.sorry if these sound like numpty questions.but i would like to know the answers....

Post by **Ivorblueun** » 09 Jun 2006, 17:48

put simply the intercooler cools the air after its been thru the turbo as cool air is denser so more oxygen which gives you a bigger bang so more power. you will have probably noticed on a cool day that the engine pulls a bit better same principle but on a smaller scale. a popular place in the t25 seems to be over the left hand side where the air inlet is and rerouting that over to the right hand side vent. Have a look here http://www.syncro-bernd-jaeger.de/ENGLI ... er-td.html

Post by **R0B** » 09 Jun 2006, 19:25

ta fer that stu...

Post by **angry vanagon** » 12 Jun 2006, 22:53

the 1.6 td with the intercooler fitted was a passat's & the golf mk2 gtd this engine had 80bhp it has a different turbo making very slightly more boost with a water cooled housing the injection pump was setup different from the factory and it has larger injectors to make the extra power there was also a ottenger conversion for the golf2 1.6td around at the same time with a large front mount intercooler and tweeked pump/injectors this made around 90 bhp but was quite a rare conversion as diesel tunning was not as fashionable in the late 80's early 90's

Post by **HarryMann** » 12 Jun 2006, 23:29

All true Rob, and always remembering that when compressing a gas, you want to start with as low a temp as possible for maximum efficiency, so here we have a 2-stage compressor (turbo then piston/cylinder), with an intercooler in between, so helping the 2nd stage and limiting compression temps before combustion (hence lowering final temps after combustion of a given amount of fuel)... its then possible to burn more fuel without exceeding a given peak (allowable) temperature.

Thus there is no substitute for starting with as cold as one can get into the turbo (stage 1) - which practically, means insulating the intake tract and picking up the air from as high above a black radiating mass like a tarmac road as humanly possible - the T25 vans score well here, with the Shnorkel arrangement, the Dokas less so.

Heat engines produce a fair bit less torque and power in the higher 30C temps we're having recently, easily measurable...

so why do cars seem to go so well in the summer? Esp. cruise on the motorway so well?

Answers on a postcard to....

Post by **angry vanagon** » 13 Jun 2006, 21:26

is it because in the summer the windows are down and the wind rushing through you hair make it fell faster a sort of psycological thing?
a good book to read if your interested in tuning turbo systems diesel or petrol is maximum boost by corky bell loads of good advise and all the maths to go with it

Post by **HarryMann** » 13 Jun 2006, 22:36

Nope, windows open must slow you up surely but

Shall find a copy then if its about tuning turbo diesels, there's some good forums about as well.

Post by **andylen** » 13 Jun 2006, 23:13

What happens if you have no hair. Is it still the same or faster.

Post by **HarryMann** » 13 Jun 2006, 23:44

no windrush but you get a supercooled bonce, so that scores well on the speed stakes...