I am in the process of rebuilding the engine of my 100. In order to get some more punch from it, I am thinking about fitting DW forged pistons with an 9,5:1 compression ratio. You all know that if y
A CR of 9,5 does not sound extreme to me and you will probably get away with 95 (EU) octane petrol without any bother if you do not overdo it by leaning out the mixture or an extreme ignition advance
Be very careful when raising the compressions on a 100/4. We just finished re doing a 100 M that had 13:1 flat top pistons in it the engine would run on and ping so bad on street gas that you could n
First of all thanks for the big number of replys to my question. To clarify my plans: I plan to use: DW Fast road aluminum head with hardened studs and DW competition head gasket. 100S profile camsha
In my opinion you're trying to do too much and it's not necessary. The head alone along with some minor tuning will give you more than enough punch as you call it. The re-designed standard head was
Author: Magnus Karlsson <magnuskarlsson@bornet.net>
Date: Thu, 13 Jan 2011 18:39:24 +0100
The trick with compression is that you want to achieve a dynamic compression ratio of 8:1 on all Healey engines. If you raise the static compression on an engine you must use a longer duration cam, i
In my opinion you're trying to do too much and it's not necessary. The head alone along with some minor tuning will give you more than enough punch as you call it. The re-designed standard head was
I Drive presently a 100 M with these modifications and it is a very pleasant ride with a lot of power and a very good idle. These modification were done by Bob Nicholson at BRITTANIC MOTORS Avon MA
Interesting note on the Buick lifters. From information that I have recently come across the Welsh crew extracted info on the use of these parts from a long time 100 owner in Hawaii. While sourcing a
If my memory serves me correct(iffy these days), there was an old '55 or '56 mag that had modifications for a 100 to make it faster and more reliable. One of those mods was the use of push rods and l
When I had the fly lightened for my BN7 I went to my machinist. He was a Mini racer and had experience on lightening flys on many race cars. He cautioned against lightening too much. The nasty part
The lightened steel flywheel I purchased from AHealey Spares is 15lbs.....when I weighed the old one it was 36lbs. This was from a 2.9 litre engine --Original Message-- From: healeys-bounces@autox.te
You are correct that using the bucket lifters were reported in a US magazine decades ago. I hope my earlier post did not incorrectly infer that "Andy" originated the idea but only that this info was
Its like a bottle of wine. Even you pay megamoney for it its still a bottle of wine and you can only drink it. And its a matter of taste. Some prefer the taste of table wine which gives a more enjoya
Author: Michael Salter <msalter@precisionsportscar.com>
Date: Fri, 14 Jan 2011 10:58:44 -0500
Although our experience is mostly with "S" headed 100 engines I would hasten to point out that many hours of dyno testing has indicated to us that trying to get more power by increasing the usable RP
If my memory serves me correct the fast 100s race guys in 1960 Southern California were saying that they were reaching 8000 rpm. That was with using: Line bored main bearing saddles. Fully polished
If my memory serves me correctly, the fast 100s guys were also using Chevy 265/283 intake valves and I think Dodge exhaust valves. Hap Polk _______________________________________________ Healeys@au
and many others were using V8 engines.... -- Ira Erbs DIGS-4 SOLUTIONS IT CONSULTANTS Portland, OR _______ Austin Healey 3000 _______ (______ \____1960 BT7____/_______) (_________________________) __
True enough. Most used the 265/283 Chevy, I think one used a nail head Buick and I think there was one Olds. 260 Fords and 215 Buick aluminum V8s came later. I don't know of any straight 6 conversio