HEAD ALLOY 5 PORT ALUMINUM CYLINDER HEAD BARE

Found: 1 Items

My Wish List

View Cart

Click Image for Larger View

HEAD ALLOY 5 PORT ALUMINUM CYLINDER HEAD BARE

There are several advantages inherent to an aluminum cylinder head including a great deal of weight savings and considerably improved cooling. This improvement in cooling means we can now run higher compression ratios without detonation caused by localized hot spots.
Other improvements to this head are less obvious; for example, flow has been considerably improved by reshaping the combustion chamber. This was made possible by relocating the spark plug and upgrading to 12mm plugs. Early tests indicate that this head right out of the box flows comparably to a Longman GT6.
The heads are supplied as shown, with bronze valve guides and hardened valve seats installed and valve springs seats, but no valves, springs or studs. As standard the head is ready to fit 1.15" exhaust and 1.31" intake valves and has a 23cc chambers with a thick deck to allow for plenty of skimming.
Largest valves that might be fitted without changing valve seats are 1.48" intakes and 1.22 exhaust! How does it perform? We've run one on the dyno, and here's what the numbers look like. The test engine was a 1275 with .040 flat top pistons. Test #1 is a stock cylinder head, test #2 is the Aluminum head with standard valves.
RPM HP#1 HP#2
3000 47.80 47.60
3500 56.12 56.97
4000 64.22 67.23
4500 70.31 73.30
5000 73.50 76.30
5500 72.93 79.25
6000 -------- 80.27
As you can see, the aluminum head shows a measurable power increase above 3500 RPM, and, whereas the motor would not pull beyond 5500 RPM with the stock head, with the aluminum head it pulled past 6000 RPM! Flow bench tests show the alloy head outperforms the standard at all lifts.
Also, early indications are that this head responds well to mild porting above the valves.
Uses spark plug RA8HC.

$1,495.00

Part No:

Car(s):
MINI,MORRIS,SPRI

Also Purchased

May we Suggest

Shipping Info

Warranty

Price Guarantee

Customer Reviews

[0]

Customers that bought C-AHT345 also purchased the following:

SECOND GENERATION MINI MANIA PERFORMANCE CAMSHAFT
[More Info]

PRE-OWNED FUEL INJECTOR MPI TWIN POINT MINI COOPER S
[More Info]

NEVADA CITY ADVENTURE T-SHIRT 100% White Cotton T-Shirt with the Nevada City Adventure artwork on the back and a smaller Nevada City Adventure logo in front. Select Size from the pull-down menu.

On SALE: $15.95
List Price: $17.95

Size options available

'COOPER S' EMBROIDERED HAT CAP - BLACK (NEW LOGO) High quality, all-cotton "low profile" black hat with red trim and embroidered "Cooper S" logo. Adjustable band, one size fits all.

On SALE: $13.95
List Price: $14.95

ROAD WHEEL FINISHED IN OLD ENGLISH WHITE Finished in Old English White but will only accept original genuine hub caps-not our after market type-Genuine original S wheels will accept our hub caps 88G337. This aftermarket wheel looks correct b [ More Info]

On SALE: $150.00
List Price: $183.95

MINI COOPER EURO PLATE PLAQUE LICENSE PLATE A plastic 'MINI Cooper' Euro Plate. Use this for a wall decoration in your office or garage! 4 1/4" BY 20 1/2" LONG Limited to stock on hand.

On CLEARANCE: $20.00
List Price: $39.95