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| Joined: | 08-07-2006 |
| Location: | Sydney, Australia |
| Posts: | 46 |
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45D.4
RPM Advance
550 0
1250 15 +/- 1
3550 18 +/- 1
25D.4 (early emission engine)
1000 0
1600 6.8
2200 13.6
2500 17 Max
Note It list idle retard separately for stromberg cars as 3-5 at 6in of Hg and 5-7 at 10 in Hg prior to Eng. No 4803 This is the vacuum capsule on the side. This is vacuum retard NOT vacuum advance
Dellorto (I guess this means the 23D.4 as it list this for non emission engines)
BELOW 1000 No advance
1200 2
1400 4.4
1600 6.8
1800 9
2000 11.4
2200 13.6
2400 16
2500 17
Based on these figures if you were to use a 45D and simply remove the module and lock the base plate you could end up with a far to aggressive advance curve, this could be masked by reducing the static timing but I suggest you would loose performance , I have never tested this on a Dyno so I may be wrong and the engine may accept this, however I strongly suggest having 83% of your advance in by 1250 rpm is not ideal (assuming my trusty manuals figures are correct, it is a old Jensen parts & service book so I have no reason to disbelieve it)
Last edited on 12-29-2006 12:39 pm by normv