ro33

my question is, someone knows the pressure boost, enduring the conrods,
norris motorsport 18psi, this would be sure? not be too conrods std ??

Karlos G

iTrader: (4)

You should be asking what power they will take not what boost mate, boost is relative...

But to answer your question, they will take around 240bhp if you don't raise the RPM limit or sit there bouncing off it all day long, some have been known to snap at only 180bhp when being abused for example.

jay030787

Mine was running 270 at 25-26 psi on standard rods

little bram

When I had my 1.6 I got the rods shot peened and balanced but still snapped at 25psi. I think jano OKC told me I should have set it to 19/20psi max.

Karlos G

iTrader: (4)

Fella's you can't tell the guy what boost he can run or compare what boost you ran, it's relative to the engines VE.... 20psi on a standard T3 might be fine but try 20psi on a GT30 and watch your rods bend and snap... 190bhp VS 350bhp! lol

Karl

Hello,

The problem now with std conrods is how much fatigue they have seen over the years as they are very old now.

Back in the 1990's when I started tuning them, I did push them to 240bhp and 7000rpm, and had the occasional failure at that level. Today, they simply wont take that power and rpm, Im afraid old age and fatigue has taken its toll!

As such we advise 200bhp and 6500rpm MAX with ARP rod bolts fitted. Simply isnt worth taking the risk above that power.

little bram

Btw I wasn't telling anyone what they can or can't run just saying what I ran and what I was told. Also If he is running a gt30 and standard rods he needs to have a word with him self. I can see what you mean tho Karlos.

Canada1

Replacement forged rods are available now anyhow. And they are not all that expensive.
Re manufacturing old rods (resizing big end and small ends and new rod bolts)costs nearly the same as new forged rods.

3i Jim

I was running 24psi with standard rods, had no problems

Karlos G

iTrader: (4)

lol that's ok mate, yeah I was just using that as an example of why you cannot compare boost levels from one car to another, it's almost meaningless.