How much boost can stock headbolts take??
07-29-2003, 03:10 PM
#1
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How much boost can stock headbolts take??
Yes i am well aware of ARP's existence, so don't just tell me to get those. This is a question of meer curiousity. Just curious if there's a boost / hp range that they usually fail at. Thanks
08-19-2004, 10:49 AM
#3
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Re: How much boost can stock headbolts take?? (boosted_zc)
I was able to run about 15psi on stock head studs on F23 for about 1.5k miles then they streached 1/8" across the board 
. Now using H23 headstuds from ARP. 
The car was making around 320 whp
. Now using H23 headstuds from ARP. The car was making around 320 whp
08-19-2004, 11:28 AM
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Re: How much boost can stock headbolts take?? (boosted_zc)
well on my setup i am using stock HONDA studs and they are holding and i am pushing 20 psi on a sc61(.70ar) turbo... but if i had the chance to put the arps in i would .. 
08-19-2004, 12:02 PM
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Re: (USDM 4G VTEC)
If it's D-series, the head's gonna lift and you'll need a headgasket. Just wait until then to put ARP's on.
Never re-use stock head bolts. Yeah, yeah, their are people who have done it, but why would you go through the trouble of putting on a fresh head-gasket, having your head decked and not buy $100 insurance that you won't have to do it again. That's just the way I look at it. Why spend $50 on a head gasket, if you're not sure if it'll last because your head bolts might be stretched.
Never re-use stock head bolts. Yeah, yeah, their are people who have done it, but why would you go through the trouble of putting on a fresh head-gasket, having your head decked and not buy $100 insurance that you won't have to do it again. That's just the way I look at it. Why spend $50 on a head gasket, if you're not sure if it'll last because your head bolts might be stretched.
08-19-2004, 12:13 PM
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Re: (Ibiza)
In our motors for the Pro FWD the H22. We O-Ringed the head. Used stock head bolts and stock head gaskets and have never had a problem. We have boosted over 45+psi on this setup and no problems. Although this may get a little pricey as we replace the bolts everytime the head comes off.
The other thing if you are using studs yes they are re-usable, but make sure after you bolt on the head put the through a few heat cycles and re-torque them. This is important or you will be blowing head gaskets.
The other thing if you are using studs yes they are re-usable, but make sure after you bolt on the head put the through a few heat cycles and re-torque them. This is important or you will be blowing head gaskets.
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