wat is the most psi can u give the stock block with a 1.3mm hks headgasket and arp head studs torque down at 100
max psi
- Thread starter boostfreak2011
- Start date
All depends on your tune.
Xman made 743hp with a stock block and head except for a mhg and arp studs. Then again he had a full standalone and tuned it really well.
If your on stock turbop and afm go to just under fuel cut. If you have lex/550/afpr/afc or maft or something again you can go under fuel cut but fuel cut with those mods is around 17-18psi.
Xman made 743hp with a stock block and head except for a mhg and arp studs. Then again he had a full standalone and tuned it really well.
If your on stock turbop and afm go to just under fuel cut. If you have lex/550/afpr/afc or maft or something again you can go under fuel cut but fuel cut with those mods is around 17-18psi.
Keep in mind too that PSI doesn't necessarily equate to mass of air, or actual power.
In Calgary, Alberta, you're at 3500ft elevation above sea level. Go to Vancouver, and you're at sea level. This means that compared to Calgary, an NA engine is running almost 2PSI of boost just by driving to the coast. This also means that if you were just under FCO in Calgary, you'll be hitting it in Vancouver fairly often. On the flipside, if you hit FCO in Vancouver once in a while, you probably won't hit it at all in Calgary.
Add in changes for temperature, or just weather, and PSI isn't necessarily a very accurate measure.
Also, 12 PSI on a CT26 is not going to be the same as 12 PSI on my 60-1 turbo. My turbo will have a different efficiency at that rate, and will flow more air, with less heat than the CT26 will, so even though the manifold pressure is the same, there is a greater mass of O2 entering the combustion chamber, which means greater cylinder pressures, and more power.
tl;dr: It depends on your tune.
In Calgary, Alberta, you're at 3500ft elevation above sea level. Go to Vancouver, and you're at sea level. This means that compared to Calgary, an NA engine is running almost 2PSI of boost just by driving to the coast. This also means that if you were just under FCO in Calgary, you'll be hitting it in Vancouver fairly often. On the flipside, if you hit FCO in Vancouver once in a while, you probably won't hit it at all in Calgary.
Add in changes for temperature, or just weather, and PSI isn't necessarily a very accurate measure.
Also, 12 PSI on a CT26 is not going to be the same as 12 PSI on my 60-1 turbo. My turbo will have a different efficiency at that rate, and will flow more air, with less heat than the CT26 will, so even though the manifold pressure is the same, there is a greater mass of O2 entering the combustion chamber, which means greater cylinder pressures, and more power.
tl;dr: It depends on your tune.
Thats an overtorque.. I thought 92 lbs was max on ARP.. anything higher is risky ..
Just what I think.. physically, your stressing the head bolts.. but there is a safety factor, so it should hold. However, I like staying on specs because I think they are there for a reason. (mind you.. Im not a mechanic.. so maybe 100 is fine)
Just what I think.. physically, your stressing the head bolts.. but there is a safety factor, so it should hold. However, I like staying on specs because I think they are there for a reason. (mind you.. Im not a mechanic.. so maybe 100 is fine)
Torque on head studs/bolts all depends on lube. With arp studs/bolts the torque with the newer ultra lube is 90 ft/lbs with the older reg lube its 80 ft/lbs. If you use motor oil its something like 130 ft/lbs. If you do it dry its something like 58 ft/lbs.