1996 850R ecu in a 1995 850 na

dimasp · Post by **dimasp** » 18 May 2010, 09:10

Hi everyone ! Does anyone knows what can happen if a switch a '96 850R to my '95 850 na, should I see some improvement?

Post by **jblackburn** » 18 May 2010, 10:21

The two systems in the 850's are incompatible, and the ECU is for a turbo model to begin with, so even if they were both the same system, it would be wildly confused about the differences.

If you are just trying to get a bit more power out of the NA engine, there are a few cheap, easy things you can do to improve the pickup and response. Give us a holler back and I'll point you to those if that's what you're looking to do.

dimasp · Post by **dimasp** » 18 May 2010, 11:09

Thanks for your answer,and yes I'm trying to get more power to my car ( '95 850 glt automatic ) so I'm waiting for your advice.
Dimas

Post by **jblackburn** » 18 May 2010, 11:32

Take a look at some of these simple, easy modifications that polska provided links to:

polskamafia mjl wrote:+1 There was a time when I wanted to convert my NA to turbo, my mechanic even said it could be done. However, after learning more about the NA 850 engines I realized what everybody else already knew: it would cost more to turbo an NA than to buy a turbo 850. The reason is that the NA engine has a compression ratio of almost 11:1 if I'm not mistaken, that's really high. If you throw a turbo on there the engine will quite literally explode. In addition, the cost of a turbo itself is quite high and then you are faced with the challenge of mating an NA ECU to a turbo engine.

If you want more power from your NA try out theses links:
$25 Cold air intake -> https://www.matthewsvolvosite.com/2009/1 ... -tutorial/
Discussion on airbox upgrades -> http://www.volvoforums.org.uk/showthread.php?t=71714
Throttle plate mod -> https://www.matthewsvolvosite.com/forums ... =1&p=80951
Airbox T-stat Removal -> https://www.matthewsvolvosite.com/forums ... =1&p=82880
More on air induction -> https://www.matthewsvolvosite.com/airbox.php
And even more on air induction -> https://www.matthewsvolvosite.com/forums ... =1&p=59606

Good luck!

Post by **charlyW** » 18 May 2010, 11:45

Your ECU might not even fit in the carrier as the pins may be different if they are the same you stand a chance of frying both your electrics and your ECU not a good prospect at best you wont do anything because the ECU mapping is very different between an R as it has a turbo engine and the N/A obviously doesnt.

It's not a wise thing to convert a N/A to Turbocharged mainly from the construction of the block it hasnt got the adequate cooling which the Turbocharged blocked does and the compression on an N/A block is higher than the Turbocharged. I am in the process of converting a N/A Block to Turbocharged just because I have two dead blocks although I will be fitting one into a car It will be purely for show