Refresh951's Hybrid Stroker - A Blown944 Design
#16
Rennlist Member
Thread Starter
Thanks Joshua! Block had to go back to machinist to get ports added. I will get you some pics in a couple days.
Sid has been looking at doing this in his thread IIRC.
#18
Race Car
Yes. 3.1 using a 2.5 block and 3.3 using a 3.0 block. This is with smaller dry sleeving, with mids you may be able to go even bigger. I don't see much point in going beyond the off the shelf 105.5mm bore though.
#20
Rennlist Member
Thread Starter
#22
Very cool and interesting project along with Sid's.. Make sure to post plenty of pics and in depth info along the way, so us less experienced engine builders can listen, learn and enjoy..
I've mostly worked on motorcycles and only done complete rebuild/overhaul to my race bike engine, but these stroker projects with mostly stock parts seems less intimidating then other 3-liter engine builds, and might just be doable for someone with my puny skill levels.. At least with the help of Rennlist and loads of pics to illustrate stuff..
I've mostly worked on motorcycles and only done complete rebuild/overhaul to my race bike engine, but these stroker projects with mostly stock parts seems less intimidating then other 3-liter engine builds, and might just be doable for someone with my puny skill levels.. At least with the help of Rennlist and loads of pics to illustrate stuff..
#23
Something I don't quite figure out and didn't dare ask in Sid's thread - can we still use Glyco main bearings when grinding that much material off the crank to reach that higher stroke?
Or are rod journals also ground?
Either way, interesting project and thanks for sharing.
Or are rod journals also ground?
Either way, interesting project and thanks for sharing.
#24
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Something I don't quite figure out and didn't dare ask in Sid's thread - can we still use Glyco main bearings when grinding that much material off the crank to reach that higher stroke?
Or are rod journals also ground?
Either way, interesting project and thanks for sharing.
Or are rod journals also ground?
Either way, interesting project and thanks for sharing.
#25
Race Car
If you use a good crank guy they can straighten it after nitriding, I elected to have the mains ground initially and had to order main bearings from Porsche Germany.
The rods are the only ones that "have" to be undersized. If the machinist can do it.
The rods are the only ones that "have" to be undersized. If the machinist can do it.
#27
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#29
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#30
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Fantastic, I'm really looking forward to seeing this project completed. My motor only has 45k on it, but when it finally needs to be rebuilt, this is exactly the type of hybrid project I've been dying to do. Can the bore be expanded a bit more to achieve 3 liters with this type of setup?