boost mad

iTrader: (8)

another question envolving the bottom end..


what would you say the pros and cons are to having a long stroke crank?

just toying with some ideas for the new engine !

SafeChav

You want advice on stroking?

LOL AFPMSL

From here on you will refered to as "stroker"

boost mad

iTrader: (8)

dont you start !

the saph is off the road now so i can start saving for some bits and pieces..... long stroking is just an idea i had

Mark Shead

There are many benafits to it and I cant see any down sides if done correctly, But with all the best bits ie Pistons/Rods/Crank allow nearly £3300+vat, If you shopped around you could get it cheaper but debate'able if it would be as strong,
but it may be strong enough it could be enough for what you are looking for.

Mark

AustenW

The downside is a reduced rod ratio, reduction in amout of revs engine can make safely etc.

The upside might be more BHP and torque but with spikey torque it just breaks gearboxes and looses traction etc

It will also move the power band further down the rev range and make the turbo spool up quicker

From a personal point of view I have chosen to de-stroke my engine from a 2.1 to a 1.8 as I'd rather have the power band further up the rev range and less torque to make the car more drivable

You cant beat cc's for power though

IMHO

SafeChav

Sorry i forgot you're getting on in your life now, you sound married off already

boost mad

iTrader: (8)

thats right, ive got a job

not married yet tho

scoooby slayer

iTrader: (4)

that firm in norway are de stroking a cossie lump to 1700 and hoping for 1000 bhp

boost mad

iTrader: (8)

Gatecrasher

What sort of power have you achived from these conversions mark?

I remember seeing a 2.4L stroker engine Years ago in a Ford mag, any reason why these never took off?

scoooby slayer i assume you ment 2700cc, any more info on that?

this has the potential to be a good topic on bigger cc stroker engines

Chip

iTrader: (3)

Rods was making 700+ on the dyno before it had a failure, on a stroked motor.

Higher piston speeds around TDC allow more ignition timing to be dialled in is another pro that ive not seen mentioned in this thread yet.

RWD_cossie_wil

iTrader: (9)

what are the power limits for a non-linered 200 block?

Chip

iTrader: (3)

No one knows a definitive answer to that AFAIK, especially as there are different ways to make power that strain the block in different ways.

Gatecrasher

From what i have seen tuners say that anything over 600hp you should have liners for somthing like rods 700+ engine it must have custom liners

to have a Block long studded, with custom liners would be about £2000 and to Quote mark
so for all the bits mentioned is about £3900

Doesnt sound a lot when you look at it like that

RWD_cossie_wil

iTrader: (9)

Thing is, at those power levels, is it really worth pushing a 2.0 engine that hard, when you can pick up a crate LS1 V8 for about 4k with a gearbox? ..... IMHO once you start spending stupid money on a block like that, the drivabillity and life of the engine is a serious offset against the expendature......

Gatecrasher

you say that Wil but any decent tuner will ask you 10K for a 500HP engine so for under £6000 for a 700hp bottom end its very tempting dont you think?

Its like you said anyone can go and buy a V8 for 4K ready to rock but wheres the fun in that

and as far as reliablity, its not like your running round on full boost all the time, if the Gatebill mob are doing it

RWD_cossie_wil

iTrader: (9)

but you get to the point where its just not nice to drive anymore, even a T4 car isn't very nice to use all the time is it?

Gatecrasher

yeah i male you right, but then saying that i went in MikeR car last week and that has a T4 and was well responcive was just pull off but once crusing the lag was allmost nonexistent, but saying that we wasnt hanging about

Getting back to the stroker engine more cc's will make the car more responive low down thi wont it?

Chip

iTrader: (3)

More CC makes the engine generate more torque when off boost, and also bring it on boost sooner.