Who has their Block Sleeved?
05-04-2005, 05:28 AM
#47
Race Director
Carl, sent you a PM, please keep it private.
"My concern is that the steel will expand farther than the surrounding Reynolds 396 alloy and crack my relatively thin aluminum cylinder walls. For you other readers: our engine's alloy is not typical among aluminum engines for another reason beyond the MMC inclusion of silicone. The alloy our blocks are machined from also has an expansion ratio of zero."
Where are you getting your data for expansion rate of the block? My data shows it to be somewhere between steel and a traditional 2000-series aluminium casting alloy.
If you want close the open-deck, I would tend be inclined towards the welded-in deck-plate from the 928sg. However, that was a crude home-garage type installation. There are 3D scanners available that can measure the exact gap on the top of your block and create a 3D model of the brace needed. Send that to a CNC machine and you can have a deck-brace that's a perfect fit. Tap it in wth a rubber mallet to be flush with the top and that's it, you're done. The more consistent casting of the Honda blocks allows many companies to have a single block-brace shape that'll fit off-the-shelf into a Honda engine. Unfortunately, the castings of our blocks are much too inconsistent for that, especially in the corners.
Some other possibilities in the email I sent you.
"My concern is that the steel will expand farther than the surrounding Reynolds 396 alloy and crack my relatively thin aluminum cylinder walls. For you other readers: our engine's alloy is not typical among aluminum engines for another reason beyond the MMC inclusion of silicone. The alloy our blocks are machined from also has an expansion ratio of zero."
Where are you getting your data for expansion rate of the block? My data shows it to be somewhere between steel and a traditional 2000-series aluminium casting alloy.
If you want close the open-deck, I would tend be inclined towards the welded-in deck-plate from the 928sg. However, that was a crude home-garage type installation. There are 3D scanners available that can measure the exact gap on the top of your block and create a 3D model of the brace needed. Send that to a CNC machine and you can have a deck-brace that's a perfect fit. Tap it in wth a rubber mallet to be flush with the top and that's it, you're done. The more consistent casting of the Honda blocks allows many companies to have a single block-brace shape that'll fit off-the-shelf into a Honda engine. Unfortunately, the castings of our blocks are much too inconsistent for that, especially in the corners.
Some other possibilities in the email I sent you.
