I'm getting close to starting the engine build for this after spending quite some time fabricating various adaptors such as the TH400/Transfer box adaptor. I don't usually get too concerned about power outputs but as this is the first time I've fitted a 455 to a Land Rover I could do with having an idea of what this engine is likely to be putting out. The spec is: Standard bore 10:1 pistons sitting 0.015" down hole Compression estimated at 10.3:1 TA SE Stage 1 Heads with large valves and stg1 porting TA 284-88H cam with TA heavy duty rocker shafts and rockers. SP1 intake Fuelling yet to be decided but possibly a tuned port system. Rough estimates would be welcome
Any mild 455 should be capable of 400+ HP in near stock trim. My guess is yours with the high compression, aluminum heads with proper exhaust (assuming either shorty headers or manifolds) and a good tune with decent induction should put out north of 450 with a 5,500 redline.
I would say that Greg is most likely where it should be. I could see it getting to the 475ish area if everything pans out just right. Torque wise obviously north of 500 ft lbs and that is where that land rover will be fun. The bottom end grunt is where it's at.
I was going to question the cam choice for a Land Rover but didn't go there. A big lower end cam would probably be more effective if this is an off-road endeavor.
That is true but it will be plenty of torque by 2500 RPM. Maybe not over 500 til around 3k but 475 or so torque is plenty to off road.
Power range for his cam is between 2K to 5K it should work quite well. I have the same cam in my 53 and the response with 3.42 gears is instant even off idle. Bob H.
Probably should have mentioned that the TH400 is a switch pitch and the transfer box has a good crawler gear
The cam you choose for this app is good with the heads and compression you have, don't let people tell you that you don't need RPM with a 4X4 application! In that Rover that cam could still be a rock crawler cam in a 455 with multiple gearing like you will have with a transfer case! Most people here don't understand gear multiplication! When you have a transmission gear running thru a transfer case gear before it gets to the front and rear gearing multiplication with a BBB 455 in a light for a 4x4 vehicle the cam doesn't need to be from off idle! Good choice of cams for your swap, it should run well in first gear in low range driving up a hill, even if you left it in drive it would do well shifting thru the gears!!! But will probably break the components behind the ST400!! The 455 BBB isn't as light as a Rover or a 215 all aluminum engine but with aluminum heads and intake IS lighter than a small block Chevy! Good choice on engine swaps, the only better swap would be a small block Buick 350 with aluminum heads that would be even lighter, but unfortunately the aluminum heads for a 350 aren't out yet! GL and have fun with this creation while the parts behind the trans hold up!! Derek
Derek Thanks for confirming what I thought. I spent quite some time calculating where this combo would be making power and trying to match that to the gearing. I agree I'm likely to be breaking many components in the axles and possibly the transfer case
.015 down in the hole with a typical ~.040 head gasket is going to make for lousy quench/squish at .055. I'd zero-deck the block. Open up the chambers, or mod the pistons if needed to drop compression
Well got back from a week away and it's all arrived. I've got the TA SE Stage 1 heads with lvl 1 porting, and new pistons and rods. Took 45 hours door to door, not bad Arizona USA to East Yorkshire UK. So now I have a workshop full of shiny new parts. Just need to collect the AED 850HO-AN from the post office and get the bottom end balanced.
Yup, a very long time. I have spent a lot of that time working on this http://www.v8buick.com/index.php?threads/my-latest-rover-build-293cu.320525/ Now its time to get my 455 Land Rover finished. @Briz you are correct. It's a TA high flow remote filter setup.
A quick question regarding cam timing The cam is a TA 284-88H and the vehicle is a Land Rover Defender with a TH400 switch pitch. Do I install straight up or go 4 degrees advanced? Any thoughts would be welcome.
So you're recommending straight up then. I'm more inclined to go with 4 degrees advance given the type of vehicle.
