is head flowing worth it on forced induction?

not sure on the r32, on my 1.8T the rods were the weakest link and then the valves.

 

is head flowing worth it on forced induction?

not sure on the r32, on my 1.8T the rods were the weakest link and then the valves.

Think thats pretty much the same on the R sure a few people have mentioned Rods..:eek:

 

450ftlb and things could start bending after that on standard rods

 

SirHenri's Bi-Turbo has 700nm (516lbs) and that runs standard internals and was designed by Martin Graf of HGP and he worked on the R engine when he was at VW.

HGP do a stage 3 twin turbo that runs 710nm (523lbs) that also runs standard internals.

From what I have read it's the gearbox you need to worry about more but if car is mapped correct you should not have a problem with that.
I have never heard of any on SirHenri's cars busting a gearbox.

 

SirHenri's Bi-Turbo has 700nm (516lbs) and that runs standard internals and was designed by Martin Graf of HGP and he worked on the R engine when he was at VW.

HGP do a stage 3 twin turbo that runs 710nm (523lbs) that also runs standard internals.

From what I have read it's the gearbox you need to worry about more but if car is mapped correct you should not have a problem with that.
I have never heard of any on SirHenri's cars busting a gearbox.

Some interesting info there Paulie

Do you know the specs on SirHenri's MK5?

 

Some interesting info there Paulie

Do you know the specs on SirHenri's MK5?

Daz, some info HERE mate...click MKV :top:

 

More info here also http://www.r32oc.com/garage_vehicle.php?do=view_vehicle&id=155

 

The info I got was off HGP website

Google Translate

 

Cheers Rich & Paulie

Any chance you guys know what 610nm is in lbs?

 

SirHenri will be getting a rod through the block soon if they are standard parts. I am sure he has popped a few gearboxes before....

 

Cheers Rich & Paulie

Any chance you guys know what 610nm is in lbs?

Try this Torque Conversion

 

610nm is 449lbs Daz

Well Henri has been running his cars for quiet a while and i think all his rods are still ok

As for gearboxes...I could not say...he might have

 

Try this Torque Conversion

Cheers again Rich

 

SirHenri will be getting a rod through the block soon if they are standard parts. I am sure he has popped a few gearboxes before....

I'm nearly certain the con rod bearings have been uprated...and the pistons and valves are standard. Up to now I'm not sure IF SirHenri has had any gearbox issues or any issues as such? Hopefully he may read this and share his experiences?

 

610nm is 449lbs Daz

Well Henri has been running his cars for quiet a while and i think all his rods are still ok

As for gearboxes...I could not say...he might have

Cheers Paulie

 

What a good response. So should i put a head spacer in to be on the safe side as the head would be off anyway! Its not a turbo so doesn't make loads of lbs anyway probably be around 380-390?

James

 

What a good response. So should i put a head spacer in to be on the safe side as the head would be off anyway! Its not a turbo so doesn't make loads of lbs anyway probably be around 380-390?

James

James, it depends on how much boost your running?

 

its not the boost that does the damage its the torque the engine produces which bends rods....under 450ftlb you should be ok anymore i would be changing the rods and pistons.....
a head spacer will lower compression and allow more boost to be run safely but this will create more power/torque thus bending the rods sooner.....

 

Hopefully Henri will see this and if he is running standard internals he will be able to tell us how many rods he has bent in his engine...he may have had stronger ones fitted

 

Well at the moment my car is running 310ftlb. I cant imagine the car making more than 450ftlb if i put cams, manifolds,cats and have the head flowed and ported. So hopefully i should be ok. If i wanted to be on the safe side how much are a set of pistons and rods roughly?

James

 

its not the boost that does the damage its the torque the engine produces which bends rods....under 450ftlb you should be ok anymore i would be changing the rods and pistons.....
a head spacer will lower compression and allow more boost to be run safely but this will create more power/torque thus bending the rods sooner.....

James, I nearly got MJ+popcorn out

Not doubting what you've said but this is how I understood it...... How to add a turbo to a non turbo car. without going into a SC Vs Turbo debate lol

 

lol....

 

Hopefully Henri will see this and if he is running standard internals he will be able to tell us how many rods he has bent in his engine...he may have had stronger ones fitted

LOL I'm sure HGP wouldn't advertise their kits worldwide with the wrong info & with SirHenri running 2 or 3 FI'd R's both MK4 & MK5 from the same tuner??!!!!!!!!! can't see many bent rods there............

 

LOL I'm sure HGP wouldn't advertise their kits worldwide with the wrong info & with SirHenri running 2 or 3 FI'd R's both MK4 & MK5 from the same tuner??!!!!!!!!! can't see many bent rods there............

Daz, the thought did cross my mind

 

we shall see chap....how do you know SirHenri's aren't Steel rods or at least shotpeen'd standard ones?