OEM forged rods & pistons... weight reduction
12-30-2016, 10:03 AM
#17
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Depending on the piston. Some have really thick crowns that could be machined from below or top and some edges on the inside that can be removed.
That said I think Mahle now produces 944 variety of powerpak pistons in bigger batches and those are much lighter and gain some 15 hp on turbo by themself. They are probably cheaper now than they were few years ago.
http://www.us.mahle.com/mahle_north_...us-pistons.jsp
That said I think Mahle now produces 944 variety of powerpak pistons in bigger batches and those are much lighter and gain some 15 hp on turbo by themself. They are probably cheaper now than they were few years ago.
http://www.us.mahle.com/mahle_north_...us-pistons.jsp
12-30-2016, 11:59 AM
#18
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I've machined out 5 grams from what was left of the balance pads on stock pistons, that's about all you get before you start to weaken the pin boss.
On both cast and forged 944 rods, you can reduce the weight A LOT. I am doing this right now on my high compression NA build (with factory forged rods). I don't have a final number, but it will be more than 50 grams per rod.
On both cast and forged 944 rods, you can reduce the weight A LOT. I am doing this right now on my high compression NA build (with factory forged rods). I don't have a final number, but it will be more than 50 grams per rod.
01-01-2017, 12:44 PM
#20
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01-01-2017, 02:47 PM
#21
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How high are you looking to rev? A ton of engineering goes into rod design, they're probably the hardest working part of the engine. The aftermarket ones are expensive partially because of that engineering overhead. Modding rods will probably destroy their strength.
01-01-2017, 04:25 PM
#22
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Just looking to stay stock in regards to rpm because #2 fear, so
max 6600rpm.
I appreciate the PMs and information from the community knowledge sharing.
max 6600rpm.
I appreciate the PMs and information from the community knowledge sharing.
03-04-2017, 11:38 AM
#23
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I wonder if a lightweight connecting rod could aid the longevity of stock-type rod bearings in a street driven application? My suspicion is that it wouldn't, since the force of rotation is nothing compared to the power pulses coming from the pistons. It's unfortunate than in all the time these cars have been around that no manufacturer has stepped up to make a better bearing.
