455 in a Land Rover

Discussion in 'Street/strip 400/430/455' started by Rossco, Jul 9, 2015.

  1. Rossco

    Rossco Greetings Earth Creatures

    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
    Last edited: Jan 2, 2020
  2. knucklebusted

    knucklebusted Well-Known Member

    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.
  3. jzuelly1

    jzuelly1 Jesse Zuelly IV

    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.
  4. knucklebusted

    knucklebusted Well-Known Member

    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.
  5. jzuelly1

    jzuelly1 Jesse Zuelly IV

    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.
  6. rmstg2

    rmstg2 Gold Level Contributor

    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.
  7. Rossco

    Rossco Greetings Earth Creatures

    Probably should have mentioned that the TH400 is a switch pitch and the transfer box has a good crawler gear
  8. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    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!!

  9. Rossco

    Rossco Greetings Earth Creatures


    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
  10. Schurkey

    Schurkey Silver Level contributor

    .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
  11. Rossco

    Rossco Greetings Earth Creatures

    Two things.

    1. The 455 has lousy squish anyway
    2. The gaskets are 0.27"
  12. Rossco

    Rossco Greetings Earth Creatures

    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.
  13. Rossco

    Rossco Greetings Earth Creatures

    Finally after a 4 year delay I've got to spend some time in the workshop.


  14. Briz

    Briz Platinum Level Contributor

    Thats a LONG time to be out of the shop. Is the red piece on the oil pump a remote filter adapter?
  15. Rossco

    Rossco Greetings Earth Creatures

    300sbb_overkill likes this.
  16. Rossco

    Rossco Greetings Earth Creatures

    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.
  17. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You degree the cam and follow the cam card.
  18. Rossco

    Rossco Greetings Earth Creatures

    So you're recommending straight up then.

    I'm more inclined to go with 4 degrees advance given the type of vehicle.
  19. flynbuick

    flynbuick Super Moderator Staff Member

    Check to see how many degrees are already built in when it is installed straight up.
    Rossco likes this.
  20. Rossco

    Rossco Greetings Earth Creatures

    Sound advice and I'll be doing just that once I get to installing the cam

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