lovely pair of heads

[stesrg]

A shot of my big valve heads

>>> Edited by stesrg on Thursday 16th September 20:31

[HarryW]

What size are the valves then, are they BIG Valve or just big Valve.

Harry

[stesrg]

HarryW said:

What size are the valves then, are they BIG Valve or just big Valve. Harry

BBIG

[steve-v8s]

Top man. You appear to have your engine in pieces on the kitchen table, as is only right and proper.

[stesrg]

steve-v8s said:

Top man. You appear to have your engine in pieces on the kitchen table, as is only right and proper.

YES

[k77-widow maker]

But did you clean them in the kitchen sink first????

>> Edited by k77-widow maker on Friday 17th September 20:17

[starmist]

Or better still, the dishwasher!

[stesrg]

starmist said:

Or better still, the dishwasher!

Hmm dishwasher plenty of detergent never thought of that one, bet it works well

[Guillotine]

who are the heads from?

as i understood it the big (std 500 or the wildcat) heads were too big on the 500 making it lumpy low down with no extra bhp.

i realise that yours is not a 500 but the effect must be the same?

(asking NOT criticising!!)

[Apache]

Guillotine said:

who are the heads from? as i understood it the big (std 500 or the wildcat) heads were too big on the 500 making it lumpy low down with no extra bhp.

True, something along the lines of the venturi effect I suppose, while the bigger valves allow more capacity they actually slow the airflow.
Low down aint so good but when on cam they work a treat especially with a big carb




>> Edited by Apache on Saturday 18th September 19:56

[Boosted Ls1]

They look bigger then the usual 43/37 stuff but it's hard to tell from the angle the picture is at I've seen a race head with 45 or 46 mm inlets and it went well but there was a huge amount of work involved.

[stesrg]

Guillotine said:

who are the heads from? as i understood it the big (std 500 or the wildcat) heads were too big on the 500 making it lumpy low down with no extra bhp. i realise that yours is not a 500 but the effect must be the same? (asking NOT criticising!!)

These are my std heads re-worked by cylinder head developments using tvr big stainless valves, the chambers were cc ed reading 25.2cc per chamber the car runs fantastic at the moment, however it is runing slightly lean and i need someone to remap the ignition however a few people have told me you cannot remap the landrover ecu and are trying to sell me a new ecu any feed back on this issue would be appreciated.
Thanks in advance Steve.....

[Boosted Ls1]

stesrg said:

[quote=Guillotine]who are the heads from? as i understood it the big (std 500 or the wildcat) heads were too big on the 500 making it lumpy low down with no extra bhp. i realise that yours is not a 500 but the effect must be the same? (asking NOT criticising!!)

These are my std heads re-worked by cylinder head developments using tvr big stainless valves, the chambers were cc ed reading 25.2cc per chamber the car runs fantastic at the moment, however it is runing slightly lean and i need someone to remap the ignition however a few people have told me you cannot remap the landrover ecu and are trying to sell me a new ecu any feed back on this issue would be appreciated.
Thanks in advance Steve.....[/quote

Those are very small chamber volumes. Is that a correct figure? If so I'm curious as to how did they do that, welding? Rovers usually have a volume of 34 cc ish although pre sd1 heads are smaller still. Maybe you have those heads but now with bigger valves etc.? They look nice though

[2 sheds]

The only way to have fully mapped ignition is to fit something like a Omex system, for fuel mapping speak to Mark Adams 01694 720144, he will provide you with a Tornado chip which plugs into your ECU and can then be re-mapped at any later stage.
Tim