Peter Burgess Lead Free Heads
Hi
For anyone in the know Peter Burgess is renown for his quality cylinder heads and having spoken to him today he is prepared to offer a club discount. Firstly I would recommend that you have a look at his site (http://www.peter-burgess.com/index.html) to see what he can offer in terms of quality and performance then once you have decided on what you are interested in let me know and I'll let you know the club price (Peter has requested that I don't post these so as not to upset any of the Big Boys he currently supplies-so basically we need to keep this one under our hats;))
You will see from the site that he offers quite a large range but to give you an idea of price the normal price for the following most common heads
Standard Lead Free £207 + Vat
Our Standard leadfree MGB heads are far from standard!
We fit bronze valve guides to aid heat removal, stainless steel exhaust valves, EN52 inlet valves, leadfree compatible exhaust seat inserts and 'top hat' style inlet valve stem oil seals. The seats are cut using three angles; the resulting improvement in efficiency more than offsets the power lost due to the use of lower calorific value premium lead-free fuel.
Before skimming the head, we carefully remove sharp edges from the chambers and valve throats.
Econotune (Stage 1) £312 + Vat
In addition to the work carried out on the Standard Leadfree head, the Econotune head features bulleted inlet guides and the combustion chambers, valves and valve throats are modified to enhance flow and smooth combustion. The compression ratio is also increased to approximately 9.5:1. As we do not increase the valve or port size, the resulting high port and seat velocities produces a broad spread of very useable power from idle to a maximum of around 4800 rpm. This is ideal for towing, motorway cruising and good torque-y 'grunt' for ascending hills.
The power increase at 3000 rpm is approximately 30% and the maximum power increase is approximately 18% at 4800 rpm.
Fast Road £402 + vat
The Fast Road head is fully reworked before the guides, seat inserts and bulleted bronze guides are fitted. The inlet and exhaust ports are modified to enhance air flow without increasing the port sizes to any great extent. This keeps the port velocities high and aids the production of low rpm torque. The inlet valves are 1.625" and the exhaust valves are 1.343".
Bhp is increased from idle to a maximum at 5200 rpm with a standard camshaft. There is a gain of approximately 25% at 3000 rpm and a maximum increase of approximately 30% at 5200 rpm (with a standard camshaft and K&N filters).
This specification of head works well with a standard camshaft and shows even more impressive gains with a Piper HR270 or Piper HR285 camshaft....( mild road and fast road type cams ).
While the head works extremely well with the standard twin SU's it will show worthwhile gains with twin 1 3/4" SU's, I would recommend the fast road HR285 type cam to compliment the increase in carburetion.
These, unlike other GB's are on a single order basis so you don't have to wait for anyone else to join in
(please note that both are based on customers old unit or serviceable old unit being provided and a carriage charge of £15 + Vat)
If you are interested or have any questions please drop me a line
Hi Colin - do you think he would give club discount on engine rebuilds as well?
KenArmstrong wrote:
Hi Colin - do you think he would give club discount on engine rebuilds as well?
Ken,
You are really tempting me here.....:p
Cheers
Col
If anyone is serious about a full engine rebuild let me know what spec you are looking for and I'll sort a price out for you;);)
Just found the following info on PB's site-
Choosing an MGB Engine
We do not operate to hard and fast rules as to what 'stage' an engine is.
We build engines ranging from slightly 'pepped up' to 'full blown'
race engines, with many variations in between.
Rather than dictate an engine spec, we prefer to discuss the
customer's requirements and agree upon the most appropriate
engine specification.
All engines are supplied with double ported, hand lapped oil pumps .
The engines are all balanced and supplied with a three piece clutch.
Engine Capacity It is tempting to build all engines to 1950 cm3; however, the thinness of the bores tends to allow bore flex and lozenging which in turn tends to allow the engine to burn oil. This can be overcome to an extent with the use of Race Quality pistons, with thin, light piston rings. The cost, of around £450 per set is also a consideration. Which is fine for Race use.
For Road use we recommend +60 thou overbore to give a capacity of
1867 cm3. The increased bore size enhances midrange power, producing
a crisp, sharp, free revving engine.
All our MGB engines are fitted with liners, this increases bhp and reliability.
Cylinder Head and Camshaft
If you are intending to use the car for Motorway/Highway cruising and the engine is unlikely to run past 4700-4900 rpm, an Econotune cylinder head and a standard camshaft combination will produce plenty of low rpm and mid rpm torque, making a smooth powerful unit that 'goes better' when you put your foot down uphill without having to change down a gear.
For a more spirited performance whilst still retaining perfect town manners, the Fast Road cylinder head and the Piper HR270 camshaft combination works well. Having a smooth power delivery from idle to around 5600rpm.
If you intend using the car for Track Test Days, Fast Road use, occasional Sprint/Autotesting, the Fast Road cylinder head and Piper HR285 camshaft combination is the ideal starting point. The idle is slightly rough/loping, becoming smooth at around 1300 rpm under light throttle. The engine will pull smoothly to just under 3000 rpm....then it lets rip to 6000 rpm with copious amounts of power and torque. The exhaust system could be changed for a larger bore, single box-type to enhance the power.
The camshaft is capable of producing even more power with a change to either 1 3/4" SU's or a 45 Weber. The engine will rev freely to around 6500 rpm.
We only use billet, cross drilled camshafts.
Typical cost of an 1867cm3 engine with Fast Road head is £1875 plus vat
exhange.