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Hey fellas, im looking at rebuilding my spare crossflow motor for a cortina Looking at the following Ice ignition triple webbers Crow solid cam 14626 Yella terra roller rockers yt 5011 spool piston and rods El crank alloy head has had some porting done. running a stage 2 C4 gearbox stock 25 spline diff.

Gcday mate, that all sounds pretty stout, cam is quite wild at 238/244 (0.050"), 109 lobe but lift is sensible at 0.560/0.570. You will need some serious valvesprings (say 140 on the seat) and retainers to go with that, I would look into what beehive springs you could use (LS type perhaps), single groove valves and collets would be a good idea too. I would get the crank, rods, pistons, balancer and flywheel all balanced as that combo will be a high rpm one that will show up any wonky bits on a long-stroker like that. Run those cam specs through a dynamic comp calculator and aim to reach low-to-mid 8s, my guess is that you'll likely need to be at around 11:1 static. If/how much you need to shave it will depend on what head you're running and what size chamber. I would expect the HP to be around the mid-200s, which is double what the factory motor had. One last thing... 25 spline axles aren't very strong. My mild 302/T5 XE wagon has started twisting the axles, and they're 25s. I have a 28 centre and axles ready to go in when time permits. I remember my TF Corty originally having the tiny Sigma BW type diff (6.5" crown I believe) and while I didn't blow it, it was badly worn and I replaced it with an earlier TE one that had the Falcon 7.8" gears. That would have been a 25 spline but it wasn't a built engine though, fairly mild. I would recommend a 28 centre with cut-down Pintara axles re-drilled for Corty stud pattern. 3.45 gears are easy to find, I even have a spare set myself. You didn't specify what model your Corty is, but I gave a heads-up anyway. Sent from my CPH2197 using Tapatalk