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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old November 14th, 2017, 12:21   #1
bobbiemartin
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Join Date: Jul 2012
Location: Jacksonville, FL
Default ALH 250+ HP Internals

After reading and responding to some other threads here, I'm wondering what needs to be done to have a reliable 250 (or more) HP ALH. I'm pretty happy with my car now, but wondering what it would take to get a good bump in power. From what I've read, much over 22-24 pounds of boost requires stronger rods.

I'm just in the planning stage and I have a complete ALH engine I could use for the build. However, if I'm going to change the rods, what else should be done? I've read lots of threads, but not 100% sure what is the best way to go. As I understand it the BEW and ARL blocks are stronger. I know the BHW pistons are said to be the best to use. Can the BHW block be used with ALH accessories (head, front plate, pump, etc)? The BEW and ARL cranks have larger rod journals. Any appreciable difference between them?


I'm thinking the BHW or BEW block with BHW pistons using aftermarket rods with a ARL or BEW crank and ALH head may be the best combination. I would welcome any suggestions
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Old November 14th, 2017, 14:25   #2
sam-
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Join Date: Oct 2008
Location: Belgium
Default

If i were you i would just put rosten rods or any good aftermarket rods and eventually get the pistons machined to lower the CR.

But it look like many people push power on standard block, especially as the high powered one doesnt have much in the low rev, obviously a good tuning also help to keep everything in one piece.
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