Is better head stud need for higher boost application?
11-14-2004, 10:23 PM
#1
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Is better head stud need for higher boost application?
I am running K04 on B6 and was told to reinforce the head studs before dial up my boost to 28 psi. Any thoughts that the stock bolts to hold such boost setting?
11-15-2004, 03:26 AM
#2
I've had some experience here...
Motor was my AAN I-5 from a 93 urS4. I was running a pretty large Garrett T04E 54 trim hybrid. I would typically run boost at 22-24lbs. I ended up with a few burnt valves and when my shop went to pull my head, several of the stock Audi head bolts were stretched. I ended up with a full port and polish with ARP head studs and lowered compression. I now run upwards of 28lbs on 91 octane and 30lbs with 100 octane with a 57 trim. HTH.
Hap, wit nomoh stretchin like dahkine in Evahboost
Hap, wit nomoh stretchin like dahkine in Evahboost
11-15-2004, 03:54 AM
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Studs actually cause problems on hi boost
Much better to use stretch bolts. replace as necessary. Studs have no give, will cause head casting to compress. Ask MTM what they use.
Rod
Rod
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11-16-2004, 08:50 AM
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if it's just 28psi on a K04, I wouldn't worry about it....
since you'll just be blowing hot air.
If it was a real turbo, that was actually in it's effeciency range at 28psi, then you might want to consider it.
If it was a real turbo, that was actually in it's effeciency range at 28psi, then you might want to consider it.