Garrett Gt35r Install
#136
Rennlist Member
I had a long discussion with Zoran who has a well documented 968turbo and he has spent plenty of $ on his car over time. He said he experienced head lift at 28-30psi which yielded approx 450kw at the wheels. He has ARP headstuds and stock headgaskets. There is also someone else down here who drills the block right through and has studs all the way into the girdle I believe and supposedly he has had success with this, but I don't believe this person is hitting any real boost levels so not sure how to take that. You could also easily be more prone to stud stretch due to the extra length.
#137
Formula One Spin Doctor
Rennlist Member
Rennlist Member
I had a long discussion with Zoran who has a well documented 968turbo and he has spent plenty of $ on his car over time. He said he experienced head lift at 28-30psi which yielded approx 450kw at the wheels. He has ARP headstuds and stock headgaskets. There is also someone else down here who drills the block right through and has studs all the way into the girdle I believe and supposedly he has had success with this, but I don't believe this person is hitting any real boost levels so not sure how to take that. You could also easily be more prone to stud stretch due to the extra length.
#138
Rennlist Member
I believe it was a GT3582r.
#139
Looking through some old threads, there seems to be a recurring pattern of headlift on engines with aftermarket studs. My guess is that with the right stud / gasket combination headlift would not be a problem. Maybe someone knows what this combination is?
#140
Rennlist Member
As an extension to this discussion, what other issues can we expect to face at higher boost? Lets assume we have a good tune and race or equivalent high oct fuel, what else could fail?
#142
You can see in the top right of this pic with the line running through the turbo water pump bracket.
This is where the filter sits
#144
#145
Three Wheelin'
Thread Starter
Holy old threads batman!
Eniac, a Gt45r is an 80mm 1100hp turbo just fyi. You would be taking it easy on your motor in comparison by alternatively blowing the head off your motor with 50lbs of C4! That would be some serious work to try and make it withstand that turbo and 40+psi, not to mention a lag monster.
Eniac, a Gt45r is an 80mm 1100hp turbo just fyi. You would be taking it easy on your motor in comparison by alternatively blowing the head off your motor with 50lbs of C4! That would be some serious work to try and make it withstand that turbo and 40+psi, not to mention a lag monster.
#147
Holy old threads batman!
Eniac, a Gt45r is an 80mm 1100hp turbo just fyi. You would be taking it easy on your motor in comparison by alternatively blowing the head off your motor with 50lbs of C4! That would be some serious work to try and make it withstand that turbo and 40+psi, not to mention a lag monster.
Eniac, a Gt45r is an 80mm 1100hp turbo just fyi. You would be taking it easy on your motor in comparison by alternatively blowing the head off your motor with 50lbs of C4! That would be some serious work to try and make it withstand that turbo and 40+psi, not to mention a lag monster.
Regardless of what turbo I use, I am confident our engines can withstand 40+ psi provided the timing was right with a steady AFR. I use xylene now but will be adding a meth injection along with it. I don't drag race so lag shouldn't be much of an issue with proper driving. I've seen larger turbos on a 2.5l. I'm also going after top end power. I hope to enter an open road race before I get too old.
#148
Three Wheelin'
Thread Starter
Ah, I'm doing fine. This godd@mn real estate industry is killing me though! (please excuse the language) I sold my 911 to a friend and have been Porsche-less since December *disclaimer* "May lead to feelings of worthlessness......". I'm just itching to buy another one of these cars again and a 911, but I'm forcing myself to take at least a 1 year break from sports cars and modifying cars to get my head and pocket book straight.
80mm+ and you might want to build that thing to 10k rpm to get any sort of powerband! j/k I always try to look at it in terms of desired power output. Once you determine that and your intended use/purpose, it's not hard to decide where to go from there. Anything single turbo and BIIIIIIGGGGG is good in my book!
80mm+ and you might want to build that thing to 10k rpm to get any sort of powerband! j/k I always try to look at it in terms of desired power output. Once you determine that and your intended use/purpose, it's not hard to decide where to go from there. Anything single turbo and BIIIIIIGGGGG is good in my book!
#149
Rennlist Member
Well at least you'll be glad that your original turbo is going into a nice motor. There will be a write up soon explaining in more detail what's going into this build.
#150