How much power can a standard bottom end
take on a S2

 

Depends on all sorts of variables like oil pressure, wear etc etc, a good estimate I would say is between 200 - 250 but tbh I dont really know. When I first built my fiesta the first time round it was with all standard internals and that was producing 200bhp @ 1bar. Never missed a beat.

Why do you ask?

 

Its a mates track car. Fresh rebuild with a T3. It going for a set up and hoping to run a bar but was'nt sure if it would take it.

Thanks for the info

 

id say 260 ish

 

The rods are the weak point, Cranks is good for 350bhp+, Pistons 300bhp, but the rods (or rod bolts) have been known to let go as low as 190bhp depending on how it's driven, lots of high revs for example will throw one sooner rather then later.

 

Performance ford staff car had 252bhp on std rods iirc. Jamsport did the work and maintained it.

i await to be corrected

 

Interesting, so a set of ARP bolts for the rods (might as well do crank too while you're there) and you've got an engine that safely take 250ish bhp!

 

Thanks for all the info.

 

Plenty of people run stock rods for well over 200bhp and are fine, I was just pointing out that is the weak point and how low they have been known to go.
Yes pretty much, again it's a bit of pot luck with the rods themselves too, I supose it depends on how well they were cast, how many imperfections etc..

 

250bhp max with arp rod bolts, though as said it's not ideal as you can't be 100% sure how long it will last.....1bar of boost like you're planning on running should be fine as long as the engine has been built/mapped properly, i would have used arp rod bolts at least though.

 

Just spoke to him and it has arp bolts and the c.r has been lowered a bit.
Am no sure what to.

 

I had standard rods and ARP rod bolts toff with 205 @ the wheels, ran like this for years and years

 

We've told you what to do (it will be fine at a bar of boost) but you're obviously not listening to anyone on here so probably best to phone a tuner and see what they suggest

 

A have listened and told ma mate the advice that has been given.

If you read what ave wrote. A said a dont kno what c.r it has been lowered to

 

rstdave lol

 

Pmsl.....yeah ok i'll take that one......BUT i did read it (as now was spelt no) to mean that you did 'not' know what to do
And i'm not too well up with scottish slang and lingo being a southerner n all haha

 

I must admit it took me a re-read to know what he meant, easy mistake! lol

 

ive had them shot rods through the block at 195bhp and my brothers was 240bhp and was fine just depends on the condition of the engine and needs to be set up right

 

power engineering said to me without even blinking,standard bottom take 250Bhp and no mention of arp parts.LOng as the engine built to high standards.Fresh engine,low miles.hope that helps.

 

trust what others have said here mate. a standard bottom end without arp rod bolts and running around 250bhp is a ticking time bomb. arp rod bolts are the absolute minimum.

 

 

Well if you can't trust a tuner who can you trust lol..Passionford

I personally would'nt risk running that power on standard bottom anyway.Never push it to the limit.Just asking for trouble.Ill be running around 210 / 220bhp max on standard bottom end this summer.Then forge her up.You think that safe enough?

 

Thats what I was going to be runnning on my stock bottom end but with ARP rods bolts, ended up going all forged so never got a chance to see how long it would of lasted! lol