marine02ss

iTrader: (3)

My original 408 AFR headed motor is still running strong at 530rwhp everytime. Its time for a change.I bought a MP112 that I upgraded to a overdriven 122.I currently have wiseco -8cc pistons sticking .010 out of the hole with milled AFR 225s .018 so they should be at 62cc's with a TSP 248/254 cam.Compression right now im figuring close to 12 to 1. I plan to change the 225's with big chamber 72cc AFR's to bring the compression down. How much will it bring it down? I am also looking for a new cam to replace the TxGiant as it will not work with the blower. I want that almost stock idle feel with little lope but noticeable, very comfortable to drive out of town with my AC.Comfort is the most important thing right now as Im a little tired of the big cam thing already. I just want to hear that blower whine pushing at least 10lbs and Ill be happy.
Any help on cam specs,compression suggestions are welcomed. I will fabricate the build myself with pics on how to install the 122 on a fourth gen. Any tips on lowering the K-member are also welcome. I want this conversion already and Im going to do it myself.The blower is based on a GTO kit that I bought and upgraded from a friend of mine.

N4cer

iTrader: (11)

Read around. The kits don't lower the K-member. They actually raise the body. The K-member remains the same height from the ground.

Patrick G

iTrader: (14)

Ride around in Ron Grant's 122-charged SSR and see if that 226/232 113LSA cam is tame enough for you. If it's just right, then a 232/238 113LSA cam would give you the same drivability in a 408. If you want something smoother, then make the intake duration smaller, keep the exhaust duration around the same size and widen the LSA. Should give you what you want.

Also, changing your head size from 62cc to 72 cc will change your SCR from 12.0:1 to 10.70:1. A good move.