996 Turbo engine builders?
#61
Only 1 way to find out how they work in the Porsche is to try them..
Mike
#62
Mike.
My experience with aluminum rods is limited to one domestic drag racing motor period. I have no experience with aluminum rods on a street motor or a Porsche motor. You will have to tell me about this when you do it. My first question based on my limited experience with aluminum would be regarding clearance due to the usually bigger dimensions of aluminum rods. If this becomes a none issue and they can handle high powered motors with street applications without stretching then maybe they will work. Constant and prolonged high temps are not a friend of aluminum rods.
One other question ....... the above rod does not appear to be an aluminum rod as aluminum rods usually have rounded edges with no changes in direction. Chrome molly maybe? I could be mistaken.
My experience with aluminum rods is limited to one domestic drag racing motor period. I have no experience with aluminum rods on a street motor or a Porsche motor. You will have to tell me about this when you do it. My first question based on my limited experience with aluminum would be regarding clearance due to the usually bigger dimensions of aluminum rods. If this becomes a none issue and they can handle high powered motors with street applications without stretching then maybe they will work. Constant and prolonged high temps are not a friend of aluminum rods.
One other question ....... the above rod does not appear to be an aluminum rod as aluminum rods usually have rounded edges with no changes in direction. Chrome molly maybe? I could be mistaken.
The clearances of aluminum can be an issue.. Sometimes we have to notch the block to make them work.. It might be a issue on the 996, well see.. Ill keep you informed when we start to assemble ours.. Thanks for the insight..
Mike
#64
Mike
#66
Sorry to be so late to the party - just weighed a stock 996tt rod with bolts and nuts no bearings - 565 grams - my carrillos were 35 grams lighter than that (yes you need to clearance the oil pump) and the Pauters that i used in Don Greenwoods motor were about 1 to 1.5 grams lighter than that (bolt right in) - make sure that what ever studs that you do use, red locktite them - set them to the correct height and use a sleeve over the stud and torque the stud to about 10 ft lbs - this will seat the stud against the threads and allow the loctite to set up so later when you torque the heads the studs wont move or settle when the final torque is set or you run high boost and the studs pull/stretch in the case - EVO studs will not need this procedure - sounds like a pain in the a@# to do but trust me - do it
#67
Mike
#69
In the car ........ no. On the engine dyno ....... yes. The last test, upon tear down we found an issue with the clevite bearings. Nothing wrong with the bearings other than wrong bearing for application. Clevite does not recommend their stock Porsche bearing for Porsche motors producing the power we are producing. I noted this in our thread as a red flag to others.
In addition, to the last test we upping the injectors to 2650 cc's per cylinder along with replacing the single 90 mm throttle body with six 48 mm throttle bodies, dual injectors and new distribution plenum.
The motor will be in the car before the end of summer.
Last edited by cjv; 07-24-2010 at 10:05 AM.
#70
Sorry to be so late to the party - just weighed a stock 996tt rod with bolts and nuts no bearings - 565 grams - my carrillos were 35 grams lighter than that (yes you need to clearance the oil pump) and the Pauters that i used in Don Greenwoods motor were about 1 to 1.5 grams lighter than that (bolt right in) - make sure that what ever studs that you do use, red locktite them - set them to the correct height and use a sleeve over the stud and torque the stud to about 10 ft lbs - this will seat the stud against the threads and allow the loctite to set up so later when you torque the heads the studs wont move or settle when the final torque is set or you run high boost and the studs pull/stretch in the case - EVO studs will not need this procedure - sounds like a pain in the a@# to do but trust me - do it
Another explanation may be the scale being used. You said there was a 35 gram difference between the Carillo's and stock which which computes closely with my measurement of 571 grams and Carrillo's advertised weight of their lightest rod of 535. If this is the case than adding 5 grams to each number for scale variance would come into line with what Carrillo advertises and what my scale says the stock rod weighs.
I am not looking for an argument, just attempting to make sense of the information.
Last edited by cjv; 07-24-2010 at 10:01 AM.
#71
No thats a steel rod from the same company that does aluminum rods for us as well.. Just used the pic from that company..
The clearances of aluminum can be an issue.. Sometimes we have to notch the block to make them work.. It might be a issue on the 996, well see.. Ill keep you informed when we start to assemble ours.. Thanks for the insight..
Mike
The clearances of aluminum can be an issue.. Sometimes we have to notch the block to make them work.. It might be a issue on the 996, well see.. Ill keep you informed when we start to assemble ours.. Thanks for the insight..
Mike
Here is a pic of clearances when we were using Pauter rods. Note the rod to the left and the clearance tolerance to the case. Even if aluminum rods would provide longevity, clearance for the aluminum rod's larger dimensions will make for a good challenge. Looking forward to hearing about your journey.
Last edited by cjv; 05-06-2022 at 02:38 PM.
#72
Havent posted for a while, figured I was due for an update... I don't remember where I left off but dropped my turbo off at Protomotive before leaving for Afghanistan, Todd , Cyn and company were awesome hosts and very patient showing me and my buddy Pete around their facilities.
During the tear down to replace the rods, we found a few problems, the lifters literally fell apart when they were pulled out.. we were aware of the issues with the earlier years and had planned to use the new part number (there are a few posts about the early 996tt lifters). Someone also overtorqued the camhousing bolts and pulled some threads... I'll post some pics later but why the hell would someone overtorque the cam housing?
Later on during the teardown the exhaust valves were in bad shape, they were so pitted that they would be unable to be dressed up and would probly overheat with the higher power I am looking for, they and the guides will be replaced.
My oil pump also had some stiffness and the gears looked like something went through it at some time, I'll replace it with a GT3 model, I am told not much difference but an additional pickup.
I also planned on cleaning up the heads a little bit, new Alpha turbos, the infamous protomotive 5" intecoolers, intake and exhaust, the 997tt intake manifold, e85 fuel system and a few other go faster tricks that will get us somewhere between 800-1000hp.
We should be doing the build up in the near future and will be posting more as it happens. Cant wait to drive the Proto-monster when I am back home sometime this summer :-)
During the tear down to replace the rods, we found a few problems, the lifters literally fell apart when they were pulled out.. we were aware of the issues with the earlier years and had planned to use the new part number (there are a few posts about the early 996tt lifters). Someone also overtorqued the camhousing bolts and pulled some threads... I'll post some pics later but why the hell would someone overtorque the cam housing?
Later on during the teardown the exhaust valves were in bad shape, they were so pitted that they would be unable to be dressed up and would probly overheat with the higher power I am looking for, they and the guides will be replaced.
My oil pump also had some stiffness and the gears looked like something went through it at some time, I'll replace it with a GT3 model, I am told not much difference but an additional pickup.
I also planned on cleaning up the heads a little bit, new Alpha turbos, the infamous protomotive 5" intecoolers, intake and exhaust, the 997tt intake manifold, e85 fuel system and a few other go faster tricks that will get us somewhere between 800-1000hp.
We should be doing the build up in the near future and will be posting more as it happens. Cant wait to drive the Proto-monster when I am back home sometime this summer :-)