740 turbo performance upgrade

[Philip Leduc]

I bought my 1990 740 turbo 4 years ago and have been continuously upgrading
it (euphymism for replacing worn parts) bit by bit.
By now I have new struts/shocks around and took advantage to have installed
an ipd antisway bar which I really like and gives me a firmer more european
ride.

All this got me dreaming about a performance upgrade (turbo will have to be
replaced sooner or later) I have also read about ECU upgrades (I have a
Bosch 0280 000563; says Jetronic)
Any ideas/experience about a reasonably priced upgrade (I know this is
relative), would however like to keep similar mileage (24-25mpg) when not
using the extra power.

Philip

 

[volvo480-V70]

philip, the best firm for Volvo tuning is in Goteborg
http://www.samsteffansson.se/samindex.html,

Like BMW-Alpina, Mercedus-AMG, Volvo-SAM

 

[zencraps]

I haven't tweaked my wife's 740 NA (she loves it stock), but have
modded my 244 Turbo.

Things I've done that I'd suggest:

Front and rear IPD swaybars.

Lower with IPD springs.

Shock / strut upgrade.

Support / stiffening rods, as available.

Turbo upgrade: I got one from an aftermarket company in Colorado, it is
bigger and pushes a lot of air; there is greater low-end power and more
turbo lag, but my god it is great when spooled up: effortless.

I put on the most aggressive rubber the wheels would take.

Had the head tweaked and enhanced for better breathing and
near-indestructibility.

Replaced the engine compartment wiring.

I still plan to change out my exhaust (goodbye, cat!) to a wider pipe:
that will make a definite difference.

 

[zencraps]

I haven't tweaked my wife's 740 NA (she loves it stock), but have
modded my 244 Turbo.

Things I've done that I'd suggest:

Front and rear IPD swaybars.

Lower with IPD springs.

Shock / strut upgrade.

Support / stiffening rods, as available.

Turbo upgrade: I got one from an aftermarket company in Colorado, it is
bigger and pushes a lot of air; there is less low-end power and more
turbo lag now because the vanes are bigger and heavier and take longer
to spool up, but my god it is great when spooled up: effortless power
at speed with seemingly endless reserves.

I put on the most aggressive rubber the wheels would take.

Had the head tweaked and enhanced for better breathing and
near-indestructibility.

Replaced the engine compartment wiring.

I still plan to change out my exhaust (goodbye, cat!) to a wider pipe:
that will make a definite difference.

 

[Boris Mohar]

I bought my 1990 740 turbo 4 years ago and have been continuously upgrading
it (euphymism for replacing worn parts) bit by bit.
By now I have new struts/shocks around and took advantage to have installed
an ipd antisway bar which I really like and gives me a firmer more european
ride.

All this got me dreaming about a performance upgrade (turbo will have to be
replaced sooner or later) I have also read about ECU upgrades (I have a
Bosch 0280 000563; says Jetronic)
Any ideas/experience about a reasonably priced upgrade (I know this is
relative), would however like to keep similar mileage (24-25mpg) when not
using the extra power.

Philip

http://forums.turbobricks.com/

http://msefi.com/

I have Megasquirt&Spark Extra in mine. Around 275hp with M5 mustang
transmission. http://msefi.com/viewforum.php?f=4

Now it is getting a turbo and manifold upgrade
http://www.viatrack.ca/TURBOMAN/MANIVASE.jpg
http://www.viatrack.ca/TURBOMAN/



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place

 

[James Sweet]

http://forums.turbobricks.com/

http://msefi.com/

I have Megasquirt&Spark Extra in mine. Around 275hp with M5 mustang
transmission. http://msefi.com/viewforum.php?f=4

Now it is getting a turbo and manifold upgrade
http://www.viatrack.ca/TURBOMAN/MANIVASE.jpg
http://www.viatrack.ca/TURBOMAN/

Wow, that is one super rusty engine block, the manifold sure looks nice
though.

What's the purpose of cutting out the drain bung in the block? I didn't
look at every pic yet.

 

[Boris Mohar]

Wow, that is one super rusty engine block, the manifold sure looks nice
though.

What's the purpose of cutting out the drain bung in the block? I didn't
look at every pic yet.

That dead engine block served its purpose as a jig. The drain cut was to
help me accurately bend the drain pipe. While I was bending it the pipe had
to be longer than necessary in order to get a good grip on it. The only way
to test fit it was to swing it in position.



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place