bnutter
04-12-07, 01:37 PM
Hey there, I'm from Wiseco Piston (Cleveland, Ohio). I'm putting together a list of engines we may want to produce pistons for in mid 2008. I've done about two days worth of research on the 2.0 and the 2.3 turbo (b234 type) engines and it seems to me one part number could satisfy the needs of the 2.0 and the 2.3. The 2.0's would be a bit low in c.r. (8.1:1)and the 2.3's would be standard 9.2-ish compression (due to the stroke). I could reduce the dish volume a bit and net 8.5 and 9.5 respectively if people weren't worried about raising their compression on the 2.3's.
From my research here, it also seems that a 2.3 (235r) type forged piston is also needed...I hadn't originally thought about it, but if there's a sizeable need...we may be able to fill it.
To make it a catalog stocking part, we REALLY need the block deck heights of the 2.0 and 2.3 blocks along with head gasket thickness. I've read somewhere that deckheights changed at some point as well. When I start calculations based off the o.e. dish volumes I've done in the past...things aren't adding up. I've read that the chamber volumes are about 48cc for the 2.3's..but there may be a change in that for the 94 and up cars. The 2.0's are 46cc from what I've read. The rod lengths seem to be 153mm in the b204's, 159 in the 205's, 147 in the 234's, 153 in the Naturally aspirated b234I, and 153mm in the B235r/e. I'll definitely need to have all that information correct before publishing a new catalog as opposed to calling out a bore and a "iffy" compression ratio like some other companies do. If we need to make the pistons for "Piston guided rods", that's important. We can leave the notch in for the squirter. We can put valvepockets in for the '94 and later heads if needed...they would just be along for the ride on the earlier heads.
We've been pushing our technology into the "sport compact" piston line since 2002. Coated skirts, Nitrided/Napier Steel ring package, and offset pins to reduce noise. We normally use 2618 alloy because it's stronger, but we may go 4032 on the Saabs because a lot of miles are put on them, but it's up to you. We offset the wristpins on our pistons like the o.e. to reduce noise, so either alloy has good manners. The price is very good for the quality and features of these parts.
Please let me know what you think...how far I put these up on the "to do" list depends on your feedback http://www.saabscene.com/forum/style_emoticons/ssc_emoticons/smile.gif If you want, you can email me at bnutter@wiseco.com My thanks to folks here for their help in advance...you're doing the saab community a service.
-Brian Nutter-Wiseco Piston
From my research here, it also seems that a 2.3 (235r) type forged piston is also needed...I hadn't originally thought about it, but if there's a sizeable need...we may be able to fill it.
To make it a catalog stocking part, we REALLY need the block deck heights of the 2.0 and 2.3 blocks along with head gasket thickness. I've read somewhere that deckheights changed at some point as well. When I start calculations based off the o.e. dish volumes I've done in the past...things aren't adding up. I've read that the chamber volumes are about 48cc for the 2.3's..but there may be a change in that for the 94 and up cars. The 2.0's are 46cc from what I've read. The rod lengths seem to be 153mm in the b204's, 159 in the 205's, 147 in the 234's, 153 in the Naturally aspirated b234I, and 153mm in the B235r/e. I'll definitely need to have all that information correct before publishing a new catalog as opposed to calling out a bore and a "iffy" compression ratio like some other companies do. If we need to make the pistons for "Piston guided rods", that's important. We can leave the notch in for the squirter. We can put valvepockets in for the '94 and later heads if needed...they would just be along for the ride on the earlier heads.
We've been pushing our technology into the "sport compact" piston line since 2002. Coated skirts, Nitrided/Napier Steel ring package, and offset pins to reduce noise. We normally use 2618 alloy because it's stronger, but we may go 4032 on the Saabs because a lot of miles are put on them, but it's up to you. We offset the wristpins on our pistons like the o.e. to reduce noise, so either alloy has good manners. The price is very good for the quality and features of these parts.
Please let me know what you think...how far I put these up on the "to do" list depends on your feedback http://www.saabscene.com/forum/style_emoticons/ssc_emoticons/smile.gif If you want, you can email me at bnutter@wiseco.com My thanks to folks here for their help in advance...you're doing the saab community a service.
-Brian Nutter-Wiseco Piston