3.0 944 turbo
- Thread starter pauly
- Start date
Just my opinion but I have to disagree, running a standard turbo on a 3.0 on track will create too much back pressure which is not good for longevity. You will just be choking the engine and it will not be efficient in terms of heat or fuel. If you fit a low temp thermostat then you need to fit a low temp fan switch to go with it or the setup is out of sync. Not sure this is the right solution though. Better to try and reduce temps with properly matched components and good mapping. A large radiator is a long way down the list of modifications I would make to a 3.0 turbo, I would fit a larger oil cooler first. My car is still running a standard radiator but I did fit a new one. I cant see any point in building a 3.0 turbo and then sticking a standard turbo on it for a road/ track car. The 2.5 has more than enough potential to tune if you are going to use the same turbo and will give better results in that case.
u63af
Member
I was already going to get a Garrett gt30 anyway so this is on my list to do. I find the standard turbo is a bit slow to come in and want a roller bearing One. Just going to run it next year on the 2.5 and build the 3.0 on the side.
Ps I paid £250 plus 90 p&p for he 968 block and crank so I am pretty happy with this?
Ps I paid £250 plus 90 p&p for he 968 block and crank so I am pretty happy with this?
ORIGINAL: u63af
I was already going to get a Garrett gt30 anyway so this is on my list to do. I find the standard turbo is a bit slow to come in and want a roller bearing One. Just going to run it next year on the 2.5 and build the 3.0 on the side.
Ps I paid £250 plus 90 p&p for he 968 block and crank so I am pretty happy with this?
Thats serious work there, are you good at welding?
George Elliott
New member
Good luck with it Sandy,
the results will be impressive if you can get the piston / bore materials and the engine management right.
Have you a horsepower ballpark figure in mind? when I hear 3" Exhaust and Big Turbo, you have to be hitting 380 minimum?
Its a nice project, and I know I would find it rewarding given the time to research and procure and build.
If I may say so, get an AFR onto it early so you know its not going to do a meltdown.
George
944T
the results will be impressive if you can get the piston / bore materials and the engine management right.
Have you a horsepower ballpark figure in mind? when I hear 3" Exhaust and Big Turbo, you have to be hitting 380 minimum?
Its a nice project, and I know I would find it rewarding given the time to research and procure and build.
If I may say so, get an AFR onto it early so you know its not going to do a meltdown.
George
944T
u63af
Member
I already have a wide band innovate afr gauge and knock sensor so hopefully it won't melt.
Does anyone know if the sump off the s2 is the same as the 968 as I need one. Might look at a crank scraper aswell.
Would it be stupid using standard turbo Rods or do you think they will be ok?
Does anyone know if the sump off the s2 is the same as the 968 as I need one. Might look at a crank scraper aswell.
Would it be stupid using standard turbo Rods or do you think they will be ok?
George Elliott
New member
If you use standard, it would have to be early spec as Nick suggests.
My opinion is they would be fine, subject to a condition check by an engine builder with a Surface Table and Dial gauge.
The rods do not deteriorate with age, in fact they can improve with age due to heat cycling and the effect on the steel grain structure, In the 80's BMW used 4 cyl engine blocks out of old 318's to build F1 engines.
The bolts could suffer fatigue with use but they will be renewed along with the bearings.
George
944
My opinion is they would be fine, subject to a condition check by an engine builder with a Surface Table and Dial gauge.
The rods do not deteriorate with age, in fact they can improve with age due to heat cycling and the effect on the steel grain structure, In the 80's BMW used 4 cyl engine blocks out of old 318's to build F1 engines.
The bolts could suffer fatigue with use but they will be renewed along with the bearings.
George
944
ORIGINAL: pauly
If the engine builder has x ray vision, and assuming the rods weren't bent/twisted and someone tweaked them straight
Good luck if those rods came out of something like Fens old engine [
With a little due dilligence it is not hard to source good used ones. Plenty have done this before with good results.
u63af
Member
I can see both sides to this argument. In my mind if for example you were to rebuild a 2.5 then you would probably not change the rods or pistons. If I were to get rods that were second hand then I would replace bolts etc with arp. My other side of thinking is that by the time I buy new bolts etc it will prob cost about exta £400. I probably will get new ones unless I can find a second hand set from someone I trust.
What pistons does os951 sell and have many people used them?
What pistons does os951 sell and have many people used them?
George Elliott
New member
I imagine it has sold, it was well priced and a "does what it says on the tin" type of car. Unusual colour too, like a non-metallic midnight blue.
George
George
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