Topic: vortec heads & pop up pistons will this combo work ?
hobby23 Dirt Full Roller
Total posts: 33
posted December 26, 2002 04:38 PM
anything special you have to do to make it work ?
Eljojo Dirt Freak
Total posts: 273
posted December 28, 2002 10:26 PM
YES! Domed pistons and Vortec heads mix like oil and water! Turn your Vortec head over and examine the combustion chamber. Notice how it has a kind of heart shape? Now take note of the spark plug location. There are some domed pistons which are designed specificly for the Vortec cylinder heads, but I would suspect they would be quite pricey. You might consider having your heads angle milled and the deck height of your block machined to 9.000" That will bring your compression up and help the heads to perform better too. I've got a set from a reputable shop in Florida-they suggested using the 1.94" intake valve and a 1.6" exhaust. I haven't bolted mine on yet..somebody chaned the rules and "saved" me some $$$$$$! ----NOT!
hogracer Dirt Full Roller
Total posts: 31
posted January 05, 2003 08:00 PM
A # 99480 Ross was made for a 18 degree head but works quite nicely with the Vortec's.Very stout and reliable