How to lower compression on a 2.4 20v turbo

[daza-b]

hiya guys after putting a bigger turbo on this engine but unsure of the best way to lower compression, thanks in advance

[t5_monkey]

Are you talking about the 2.4 T5 engine ?

If it's an LPT 2.4T I don't think you'll really need to fiddle with the CR until you've got some fairly serious supporting mods?

[Phil B]

To further what monkey said, on a purpose built turbocharged engine you shouldnt need to mess with the compression ratio, generally the only way you would do that would be to alter the pistons/bores and you wouldnt go to that extent unless you wanted to run some serious power, which on a 2.4 T5 would probably be in excess of 400bhp.

Im only generalising as i dont know a lot about T5 tuning, just turbo tuning in general but unless youre thinking of building a racing/drag car i wouldnt worry too much about CR

[p fandango]

think its a 850 2.4lpt engine he's using

[t5_monkey]

new turbo, FMIC, injectors and stage 0 (coil packs, oil, hosing, MAF, FPS, sensors etc...) should see you right.

Spend the rest on your suspension

[Dangerous Dave]

You can use S60R pistons to lower the CR. Smithy did something similar with his 2.5 V70, think he got the CR lowered to around 7:1

[merc85]

hiya guys after putting a bigger turbo on this engine but unsure of the best way to lower compression, thanks in advance

This is sounding a interesting project

[daza-b]

This is sounding a interesting project

lol just thinking if it is worth it, got a bid on a t5 at the min for parts, maybe i should just stick with that engine and upgrade it, easier to get parts for and can do lots lots more with it lol

[merc85]

I would have thought ultimatly, the 2.4 is the better bet seeing as it's more cc's. I dont know just a thought, althoug you hear of many well at least i dont that people have moded.

I'd have thought any volvo t5/lpt engine would need rods etc after 400 bhp

Like i say i dont really know.

[daza-b]

I would have thought ultimatly, the 2.4 is the better bet seeing as it's more cc's. I dont know just a thought, althoug you hear of many well at least i dont that people have moded.

I'd have thought any volvo t5/lpt engine would need rods etc after 400 bhp

Like i say i dont really know.

yea i have found uprated rods and forged pistons for a t5 but nothing for a 2.4, the t5 has so many more aftermarket parts available and much cheaper too lol

[Dangerous Dave]

yea i have found uprated rods and forged pistons for a t5 but nothing for a 2.4, the t5 has so many more aftermarket parts available and much cheaper too lol

The 2.5 has the same rods, just the pistons are a couple of mm bigger.

[pookie]

http://www.ferriday.co.uk/cnc/decomp...n_plates.shtml





Salut!

Pookie

[t5_monkey]

Get a T5 block and go mental

You'll get to 350bhp and it'll just be a bawbag to get more with the LPT engine.

[daza-b]

Get a T5 block and go mental

You'll get to 350bhp and it'll just be a bawbag to get more with the LPT engine.

thats the one lol hopefully i will win the t5 im bidding on on ebay and then its tuning mental time lol

[merc85]

Get a T5 block and go mental

You'll get to 350bhp and it'll just be a bawbag to get more with the LPT engine.

Good advise there me finks, The Monkey knows his stuff alright, specially wiv a mod list like his.

Oh and his hung like a donkey too! lol

[daza-b]

Good advise there me finks, The Monkey knows his stuff alright, specially wiv a mod list like his.

lol i have tuned many many cars before, just never a volvo, its always been c20let corsas and calibras, imprezas, evos and so on lol

[merc85]

lol i have tuned many many cars before, just never a volvo, its always been c20let corsas and calibras, imprezas, evos and so on lol

I never tuned a car before my two T5's, and monkey has been on here and other forums for as long as i can rember,

If it wernt for people like him and other alike, i would have been stumped ages ago lol.

[daza-b]

I never tuned a car before my two T5's, and monkey has been on here and other forums for as long as i can rember,

If it wernt for people like him and other alike, i would have been stumped ages ago lol.

lol i know what you mean, if it was a 6 pot bmw, evo or scooby i could babble on all day about them lol, just volvo is so different and the power they can pack plenty of it, just miss the power i get from a scooby thats why im after it so much more from the volvo lol

[merc85]

lol i know what you mean, if it was a 6 pot bmw, evo or scooby i could babble on all day about them lol, just volvo is so different and the power they can pack plenty of it, just miss the power i get from a scooby thats why im after it so much more from the volvo lol

owwww carefull swaering scoobie talk, LOL, i had a ride in a WR1 Scoob and yes that was awesome.

But ive got 4 kidds, and a Dog, cant get them all in one lol. Volvo everytime.

[foammanmark]

lol just thinking if it is worth it, got a bid on a t5 at the min for parts, maybe i should just stick with that engine and upgrade it, easier to get parts for and can do lots lots more with it lol

Sorry, haven't received your bid yet! LOL.