Author Topic: turbo on an '81 n/a diesel... (Read 2694 times)

eightyonerabbit · « **on:** December 23, 2007, 10:23:48 pm »

is it safe to just put the turbo on the stock n/a diesel?? ive been researching a little bit, and i read that you dont have to swap out the injection pump (of course there will be less power, but i figured it would be safer on EGT)... i could buy the other pump, but if i dont have to shell out the extra bucks and risk losing too many mpg's, then i dont want to... anyway, i will only be running about 5-7lbs, so would it be safe/reliable??

i have all the parts needed except the intake manifold, but i will be buying that within the next week from a guy in cali...

thanks,
-Aaron

AudiVWguy · « **Reply #1 on:** December 24, 2007, 01:17:44 am »

As you probably know the NA motors did not get the upgraded parts that the turbos received. Forged pistons, crank, oil squirters, etc. It is possible to run reasonably low boost pressures and be ok. After a boost gauge, buy an EGT asap and keep the temps as low as possible. Mount the sender in the exhaust manifold before the turbo to have accurate readings. 2.5in down pipe and exhaust is a must, cool air in very important too. Try to not let full throttle runs reach 1100 degrees F to be safe. Eventually plum in a Intercooler. What turbo are you thinking about?
Hope this helps

--Jeff

eightyonerabbit · « **Reply #2 on:** December 24, 2007, 01:03:08 pm »

Quote from: "AudiVWguy"

As you probably know the NA motors did not get the upgraded parts that the turbos received. Forged pistons, crank, oil squirters, etc. It is possible to run reasonably low boost pressures and be ok. After a boost gauge, buy an EGT asap and keep the temps as low as possible. Mount the sender in the exhaust manifold before the turbo to have accurate readings. 2.5in down pipe and exhaust is a must, cool air in very important too. Try to not let full throttle runs reach 1100 degrees F to be safe. Eventually plum in a Intercooler. What turbo are you thinking about?
Hope this helps
--Jeff

the turbo is from a mk2 TD... would i be able to use the stock injection pump? or should i go ahead and buy the td pump?

burn_your_money · « **Reply #3 on:** December 24, 2007, 01:32:49 pm »

I'd use the stock pump and stock injectors (rebuilt is a good idea)

I'd just use stock stuff. You'll cut some life out of the engine but considering how long they last you probably would never notice assuming you keep EGTs in check as well as boost pressure

eightyonerabbit · « **Reply #4 on:** December 24, 2007, 03:31:42 pm »

Quote from: "burn_your_money"

I'd use the stock pump and stock injectors (rebuilt is a good idea)

I'd just use stock stuff. You'll cut some life out of the engine but considering how long they last you probably would never notice assuming you keep EGTs in check as well as boost pressure

do you mean the stock N/A pump or stock TD pump?? is there a way to throw in more fuel when it gets boost with the n/a pump? or just the fuel adjuster screw??

rwdriver · « **Reply #5 on:** December 24, 2007, 10:06:52 pm »

hey, I live in Bowling Green. I go to WKU and if you ever want to stop by I always like to talk to fellow dubbers.

in case you haven't seen:

http://forums.vwvortex.com/zerothread?id=3365508

cheers

eightyonerabbit · « **Reply #6 on:** December 25, 2007, 11:31:27 am »

Quote from: "rwdriver"

hey, I live in Bowling Green. I go to WKU and if you ever want to stop by I always like to talk to fellow dubbers.

in case you haven't seen:

http://forums.vwvortex.com/zerothread?id=3365508

cheers

haha.... thats probably one of the coolest things ive ever seen... but yea... if i get my other project by next summer ill be heading down that way to hit the strip... ill PM u if im ever down there...

burn_your_money · « **Reply #7 on:** December 25, 2007, 04:25:46 pm »

Stock NA pieces

If you turn up the fuel for boost it will also be up for off boost which will raise EGTs and smoke, that's what is nice about the turbo pump, you can controll both independantly

eightyonerabbit · « **Reply #8 on:** December 25, 2007, 05:45:47 pm »

Quote from: "burn_your_money"

Stock NA pieces

If you turn up the fuel for boost it will also be up for off boost which will raise EGTs and smoke, that's what is nice about the turbo pump, you can controll both independantly

im not really worried about smoke or emissions... the environment is already pretty much screwed... but the egt's do worry me... what is the highest temp that is safe?? ill be buying a gauge before the turbo goes on...

vanagonturbo · « **Reply #9 on:** December 26, 2007, 12:18:51 am »

Quote from: "AudiVWguy"

As you probably know the NA motors did not get the upgraded parts that the turbos received. Forged pistons, crank, oil squirters, etc. It is possible to run reasonably low boost pressures and be ok. After a boost gauge, buy an EGT asap and keep the temps as low as possible. Mount the sender in the exhaust manifold before the turbo to have accurate readings. 2.5in down pipe and exhaust is a must, cool air in very important too. Try to not let full throttle runs reach 1100 degrees F to be safe. Eventually plum in a Intercooler. What turbo are you thinking about?
Hope this helps
--Jeff

Wait what? I would question that which is bolded. Slight misinformation here. All that has been bolded is not correct. TDs do NOT have forged pistons (unless NAs have them too) the crank is no different (depending on the engine), and 1100 degrees is nothing (unless we are talking about Celsius temps).

HTH

rabbitman · « **Reply #10 on:** December 26, 2007, 03:40:21 pm »

So what is the limit for egt's?

RabbitJockey · « **Reply #11 on:** December 26, 2007, 07:13:37 pm »

Quote from: "rabbitman"

So what is the limit for egt's?

no body knows. the rule of thumb is below 1500 is good. but its not like your motor will instantly explode the moment it hits that.