i have an opportunity to buy a complete running leyland p76 engine for next to nothing. the engine is to go into a ke35 corolla coupe.
my questions:
1) will a standard rover v8 manual box fit behind this? will it handle the power?
2) my idea for modifying this engine is to fit the efi manifold, clean the heads up and get a good road/race cam, and tune it on megasquirt.
3)will i be able to get about 250 horsepower by doing this?
4)how hard will this engine rev? its to be used in a track day/weekend car, so i would love to get 6000rpm out of it
hey guys... quite new here wondering about a p76 engine
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My knowledge of this engine is very limited but I can answer a couple of your questions.
1 pretty sure the box will fit, if you get a good one it will take it ok as well. get a bad one it wont, just the same as a 3.5
2 normal rover manifolds don't fit this engine as the deck height is completely different. Basically the heads are further apart so an efi manifold wont be wide enough. You could get adapters machined or better still get the manifold welded up and machined.
3 Built right 250 will be doable
4 No idea to be honest but they were meant to be a truck engine so revving wasn't part of the brief. I imagine the usual stuff would be needed like ARP studs and possibly a girdle and a good balance job. What the standard crank will take I don't know though.
1 pretty sure the box will fit, if you get a good one it will take it ok as well. get a bad one it wont, just the same as a 3.5
2 normal rover manifolds don't fit this engine as the deck height is completely different. Basically the heads are further apart so an efi manifold wont be wide enough. You could get adapters machined or better still get the manifold welded up and machined.
3 Built right 250 will be doable
4 No idea to be honest but they were meant to be a truck engine so revving wasn't part of the brief. I imagine the usual stuff would be needed like ARP studs and possibly a girdle and a good balance job. What the standard crank will take I don't know though.
Hello,
1) yes can bolt an LT77 to P76 engine but you need to care to buy the P76 engine with his own flywheel. If not standard RV8 need to be redrilled to bolt at the end of P76 crank.
2) P76 block can be easily converted to EFI but you need to use manifold spacers. They are avaiaible in Australia
3) P76 head use same small valves as early P5/P6 engine. Exhaust valves seat don't accept unleaded fuel. The simplest is to use later pair of RV8 heads but P76 block is not drilled to provide oil to rocker shafts. P76 engine uses hollow pushrods and pressed steel rockers like Chevy. The simplest is to use P76 pushrods and modified steel rocker arms for RV8.
4) P76 car engine has CR of 9:1. You can increase it just to use low comp 8.13 pistons Rover. New cr wil be around 10.5:1
5) If you can give me the engine number I can say you if it is an car or truck engine
Were are you based ? Because here in Europe as P76 car was never sold engine parts are not avaiable. Main bearings, rear oil seal, etc... are unique to P76 block.
1) yes can bolt an LT77 to P76 engine but you need to care to buy the P76 engine with his own flywheel. If not standard RV8 need to be redrilled to bolt at the end of P76 crank.
2) P76 block can be easily converted to EFI but you need to use manifold spacers. They are avaiaible in Australia
3) P76 head use same small valves as early P5/P6 engine. Exhaust valves seat don't accept unleaded fuel. The simplest is to use later pair of RV8 heads but P76 block is not drilled to provide oil to rocker shafts. P76 engine uses hollow pushrods and pressed steel rockers like Chevy. The simplest is to use P76 pushrods and modified steel rocker arms for RV8.
4) P76 car engine has CR of 9:1. You can increase it just to use low comp 8.13 pistons Rover. New cr wil be around 10.5:1
5) If you can give me the engine number I can say you if it is an car or truck engine
Were are you based ? Because here in Europe as P76 car was never sold engine parts are not avaiable. Main bearings, rear oil seal, etc... are unique to P76 block.
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paul c
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I have a P76 in my 75 RR. Heaps of torque, but dont like revving much, and love lots of fuel. I doubt an LT77 would last long behind one, although being a light car it might survive a bit longer. Spacers are a pain, although I know at least one who has welded them to the EFI manifold to cure any leakage problems. I think you would be better off with a 3.9, or even a worked 3.5.
