Turbo Buffs in here please :)

Malt_Vinegar

Malt_Vinegar

Malt_Vinegar

Don
Joined
20 Oct 2002
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Hello knowledgable turbo peeps!

I have a few questions as i now own my first Turbo fitted vehicle. Its a volvo 480turbo. It has a 1.7 renault based engine with a T2 turbo.

These engines were very conservatively tuned as standard and are well capable of a lot more boost than the standard 7.5(iirc) PSI. I know i can adjust this by fitting a boost valve. I have it on good authority that these engines are fine up to 14psi.

I have been made aware of a bloke who will adjust my car for 80 quid. He does a full service using the standard boost controller to make it gradually increase boost through the revs to get up to about 14psi.

Is it worth doing this, or spending a smaller amount on a manual boost controller and attempting to use that to up boost (using the standard boost guage to measure increases)

Also, people have been mentioning adjusting the actuator, and i really have no idea of the benefits, or exactly how to do this? Anyone able to shed some light on the matter?
 
I am told the standard intercooler is easily up to it, its larger than many of the uprated ones fitted to R5s.

I spose i could just drop a different guage onto the tubing from the standard guage.

So, but adjusting the actuator, i could easily bump up the boost? (oh and which way is to up boost, and which to lower it?)
 
Trickle said:
He could buy 2 more Volvos for the amount that will cost him ;)
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He he, exactly.

Im thinking get the 80 quid mod done. I then have a car that cost me 491quid and yet should do 0-60 in about (perhaps under) 7 seconds?

Had a look at my actuator, the thread looked a bit ropey, however, might give that a go to whip up a couple extra PSI. Then revert to standard once the mod is done :D

Oh, and apparently the ECU on the 480 turbo is pretty clever and adjusts fueling depending on Boost levels :) So Underfueling wont be a problem as long as i leave the factory 14psi cutoff in tact, and dont try to go for more than 13ish.

Lots of other 480 owners say they have no problems with 14, but i think 12 would be fine for me, seeing as this is only supposed to be a runabout!
 
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saitrix said:
So what sort of power will you get the Volvo Malt?
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Im being quoted figures around the 160-170 mark by other people who have had the mod done :)

They are saying 0-60 of just over 6 seconds, so i thinking sub 7 should be possible with the autobox.

I was told that auto boxes can have problems coping with the excess heat created at top boost levels. However, there is an easy fix. Apparently, you just add in a small rad (heater matrix will do) into the coolant feed for the gearbox, and this just makes sure you dont cook the fluid :)
 
Trickle said:
What psi is the limit where the injectors are maxed out for this volvo? Or should I say where abouts on a non modded volvo do your injectors pass 100% duty roughly speaking as you start to increase air pumped into the engine - all things being equal etc.

On a disposable car such as this I would push the psi up until just before I hit the (owners club assumed) limit in the following three areas:
  • Engine internals estimated limit with some empirical reliabilty feedback;
  • Turbos empiracal estimated limit;
  • PSI roughly equating to 100% injector duty cycle at max bhp.

Are there any other known limits on this model? Gearbox, fuel pump, ECU's airflow meter? That sort of thing.
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170bhp is said to be safe when re-mapped with the "Rich mod" Not just a re-map, but also increased boost (Some people have been running for 50k+ with the mod and no problems)

I think the 14psi limit is down to the injectors being maxed, there are people who have taken it higher but have had to do fuel system mods, including changing injectors. Some people go for different turbos to allow

Point 3 - ya lost me there guv :p
(I did mention the Auto gearbox issues earlier)

Im taking this from more knowledgable people on the volvo 480 forum, so dont assume im getting that all 100% correct!
 
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