[Shahmirplayes]

How much hp can b48 handle on stock internals

[Knifeedge2k1]

Originally Posted by Shahmirplayes

How much hp can b48 handle on stock internals

A g20 30i owner on our whatsapp group was running around 27psi (hybrid turbo) when he cracked a piston

This was with WMI on straight methanol and E50 in the tank

Was roughly mid 400s crank on his street tune and in the 500s when running@35psi

Hard to tell whether it was the high boost high output that did the damage or the extended use in "street" trim that did the damage

Both obviously contributed to the failure

[Shahmirplayes]

so i should keep it under 400?

[Knifeedge2k1]

Originally Posted by Shahmirplayes

so i should keep it under 400?

Depends what else you have on the car

WMI and or ethanol is highly recommended for pushing beyond 22psi on a stock turbo (which won't be anywhere close to 400hp)

[brisko]

Knifeedge2k1 how long was he running that setup before it blew? I'm set for an upgraded turbo in the near future but this is my daily so don't want to push it to the point of breaking things.

I was planning to go E50 as well whenever I pull the trigger, think it was the race tune that did it or his street tune? I was looking forward to 360-380whp for some fun mixed into commuting without worrying about internals.

[Shahmirplayes]

Originally Posted by brisko

Knifeedge2k1 how long was he running that setup before it blew? I'm set for an upgraded turbo in the near future but this is my daily so don't want to push it to the point of breaking things.

I was planning to go E50 as well whenever I pull the trigger, think it was the race tune that did it or his street tune? I was looking forward to 360-380whp for some fun mixed into commuting without worrying about internals.

you can get 370hp safely on b48

[Knifeedge2k1]

Originally Posted by brisko

Knifeedge2k1 how long was he running that setup before it blew? I'm set for an upgraded turbo in the near future but this is my daily so don't want to push it to the point of breaking things.

I was planning to go E50 as well whenever I pull the trigger, think it was the race tune that did it or his street tune? I was looking forward to 360-380whp for some fun mixed into commuting without worrying about internals.

I think he was on his 27psi street tune for maybe a few months but this was punctuated with doing like 35psi balls out tune which was purely developmental testing throughout that time.

For things like this you can't say it was one of the other because both intensity as well as duration of stress contribute to these things.

If I had to guess though I'd say the race tube did the bulk of the damage. That's not too say the street tune wouldn't have resulted in a failure down the line anyways so if you're concerned about longevity and reliability, take things slowly. Do oil analysis and keep an eye on oil consumption and ramp up the power slowly over multiple revisions.

[Knifeedge2k1]

Originally Posted by Shahmirplayes

you can get 370hp safely on b48

This thing has built internals iirc AND it has the hybrid electric motor contributing to that output so you can't really compare that with what the ice can do by itself

[Shahmirplayes]

Originally Posted by Knifeedge2k1

This thing has built internals iirc AND it has the hybrid electric motor contributing to that output so you can't really compare that with what the ice can do by itself

so is the power going to be higher or lower? than 370hp

[Knifeedge2k1]

Originally Posted by Shahmirplayes

so is the power going to be higher or lower? than 370hp

Of course lower

[Shahmirplayes]

Originally Posted by Knifeedge2k1

Of course lower

thx