2.4 LPT... wanted: more horsepower

beigg · Post by **beigg** » 24 Apr 2016, 07:40

This thread is intended for the 850's using an automatic trans with a designated year of 97 equipped with the 2.4LPT. However, it's ok to bring in the 2.3 and comparable systems not equipped with VVT.

The dilemma of where I sit with the 850. Poor fridge on wheels is getting up there in senior citizenship age and technology as well as performance keeps dating it more and more. If I am going to keep the ole faithful a means of transportation, I am left with one area to address in order to keep my interests in the car. That's more torque [tq] and horsepower [hp]. Personally, the tq is fine, hp is where I'd like to grow. Before going for more output, I'd like to receive some credible feedback from those that have pushed the envelope and knows what is realistic and what it took to get there?

As the 850 sits, it might at most be huffing out 200 wheel hp/tq (FWD 2.4LPT) and I'd like to increase the overall hp by 50% (100 hp) dynamically. I've thought about approaching the situation with an on demand type of power but that will not be sustainable and from the sample runs in the past, these bricks just don't benefit much from that method.

Who has the most reliable and powerhouse of a brick? What was done? Lessons learned (do and dont type of things) ? and sources used to go to such achievement?
Still using a stock wiring harness untouched and a ECU with stock parameters (I'd assume not for the ECU) ?

Sommerfeldt · Post by **Sommerfeldt** » 12 May 2016, 04:56

You'll probably get more replies in the 850 forum, but there's lots of stuff you can do.

Lucky at ARD has an LPT project, with a thread somewhere around here - I can't seem to find it right now.
There's also a Fast Friday you should check out - https://www.matthewsvolvosite.com/forums ... hp?t=51736
Lucky wrote that one too.

- S

beigg · Post by **beigg** » 13 May 2016, 21:26

Any cam shaft upgrades? Software to tune the stock ecu for the average garage greaser? I thought about swapping in the spare aftermarket turbo on hand, but really, the path i'd like to take is a stout rebuild and just up the factory existing style turbo. Already have a fmic, recent rebuild injectors and 8.8 mag cores with ngk's ad respective gap tightened up.

Will a ported head be worth the time spent? Is this all moot because of a limiting auto trans design?