Search found 26 matches

by John ball
Tue Mar 17, 2020 4:02 pm
Forum: Technical
Topic: General Handling S2
Replies: 16
Views: 1447
Great Britain

Re: General Handling S2

Are your Blockley’s the radial version or the very square section cross ply’s. I don’t understand how it can break away at 30mph on a roundabout unless you have a lot of lock and you are really booting it !!! I have radial Blockley’s on both my 120FHC and my Healey 100. Both are very secure. I have ...
by John ball
Sat Feb 15, 2020 11:45 am
Forum: Technical
Topic: Standard camshaft max lift
Replies: 18
Views: 2384
Great Britain

Re: Standard camshaft max lift

Steve and Tom, yes it is very frustrating. I have talked to RB and he seems unable explain the 235 number, which I agree must be a typo. I did not see any number on the cams, so when I spoke to Kent Cams they were not very helpful and just said they build them to RB’s request. I have spoken to RB on...
by John ball
Fri Feb 14, 2020 6:18 pm
Forum: Technical
Topic: Standard camshaft max lift
Replies: 18
Views: 2384
Great Britain

Re: Standard camshaft max lift

While on the subject of camshafts, please can someone explain to me what they think are the duration degrees for the Rob Beere camshaft I have in my XK120. It is listed as RBCSU, with a duration of 235degrees ??!! which apparently is designed for the XK engine to give good torque ? I have asked Rob ...
by John ball
Sat Feb 08, 2020 12:25 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Re: Distributor curves

Hello Mark, the curve you have posted from a friend. To me this looks far too advanced ? They are crankshaft degrees, so if you add the static of say 10, then it is going to be 45. Has he looked with a strobe light ? If I am wrong, then I have totally misunderstood how to set up the curves on the 12...
by John ball
Fri Feb 07, 2020 11:08 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Re: Distributor curves

I am not sure if I am losing the plot or what. The graph from the distributor doctor shows on the bottom line numbers x 100 but says distributor speed ? But the line up the side says degrees. I now look at this and do not understand what I am seeing. I assumed originally that I double the degrees an...
by John ball
Fri Feb 07, 2020 12:15 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Re: Distributor curves

Hello Mark, please ignore my comments about your curves. I was comparing it with the DMBZ6A which I thought was for the 3.8. You are talking about the 22D6, but is this not for the 4.2 engine ? In the original manual I believe this is what it suggests ?
by John ball
Fri Feb 07, 2020 11:57 am
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Re: Distributor curves

Hello Mark, very interesting curves. It seems to me that the curve ramps up quite early on compared to the book figures for that distributor. But still ends up at a similar approx 34 degrees. Does this work well for you ? Steve, sorry thought people knew what my car was as I think previously mention...
by John ball
Thu Feb 06, 2020 7:33 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Re: Distributor curves

Hello Tom, not sure how to answer your comments about the curves at idle. I just followed the numbers, which I think I have extrapolated correctly? I think in one of my previous posts, maybe on the HD8 post, I did mention that the car has been on a rolling road. It produced 180bhp and a very flat to...
by John ball
Wed Feb 05, 2020 5:14 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Distributor curves

What I forgot to put in my last post, was for your opinions on the curves. I cannot remember or find who gave me the E Type curve I am using, but it appears to be in the middle of the aggressive and moderate curves. The two main differences I can see from the Aggressive and moderate are the early ad...
by John ball
Wed Feb 05, 2020 4:09 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Distributor curves

Hello Steve and Tom, ok I think I have got my brain in gear and finally understood your explanations. I did not properly read that the charts were for calibrating the dizzy. I think the more appropriate curves from the 3.8 engines distributor DMBZ6A is closer to my tuned 3.4. Attached below are the ...
by John ball
Tue Feb 04, 2020 7:02 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Distributor curves

Hi Steve, I may being a bit thick, but I don’t understand why the chart numbers would need doubling. Are those figures not the degrees that you would see with a strobe light. No where can I see in the manual does it say to double the numbers ? Or even explain how set up the timing. On my original po...
by John ball
Tue Feb 04, 2020 3:59 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Distributor curves

Hello Steve, thanks for the page from the manual. I remembered, I have a manual from when I had an E Type in 1977. But, the page 363 you have posted, I believe is for a Series 2. There is a Series 1 picture on page 338. But, not sure it is quite what I wanted. I was looking for the degrees of advanc...
by John ball
Tue Feb 04, 2020 12:28 pm
Forum: Technical
Topic: Distributor curves
Replies: 23
Views: 2641
Great Britain

Distributor curves

Hello Tom, is it possible for you to tell me the exact curves you have plotted, tried and recommend. I have a fully programmable blue tooth 123 distributor, so would like to try various curves. The one I am trying at the moment, I believe is the E Type curve ? 500@10,800@12,1000@14.4,1200@18.2,1400@...
by John ball
Sun Feb 02, 2020 2:22 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

Hello Tom, your post is very interesting and obviously your knowledge on the subject is immense. Please can you explain some thing to me that I don’t totally understand. You say a 2 carb engine, the intake stroke alternates evenly between the front and rear carburettor. But if the two carbs both go ...
by John ball
Tue Jan 28, 2020 7:58 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

Hi Steve, I have looked at that post about the rolling road and UE needles. I must say I am a little bit surprised by the first run with UM needles, as the power is very low and drops off after 3114 revs. Even the second run with the UE needles only produces 195 BHP and the power drops off after 392...
by John ball
Tue Jan 28, 2020 12:33 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

This is fantastic, total international conversations - UK, USA and Austria !! You three guys are far more technical than me. With my experiments, is there anything else I can try to further improve the performance ? P.s. Chris, I have here in front of me the official SU book. It states the needle on...
by John ball
Mon Jan 27, 2020 6:55 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

Yes, I know you are right about the air filter. Just not had one on while fiddling. Never had a proper one as with the HD8’s sticking out more than H6’s as standard the steering column is too close. So had just trumpets gauze and with foam cover. So, now going to investigate the proper asymmetrical ...
by John ball
Mon Jan 27, 2020 6:17 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

Peter, Steve and Chris, interesting point about the 3.8 and 4.2 using same carbs and needles. I think the truth is that I do need to run a richer needle with only two HD8’s. For a long time I had been running the car with the jets too high at 2 turns down, but was more focused on ignition correction...
by John ball
Sun Jan 26, 2020 9:01 pm
Forum: Technical
Topic: Speed and revs, 60mph = 4100 revs!
Replies: 30
Views: 5098
Great Britain

Re: Speed and revs, 60mph = 4100 revs!

Talking about running big ends etc. When I had the car down at CKL, they recommended using Valvoline VR1 oil as they said after using that oil on a tear down, it was always very clean inside. Now I always use it. It is more expensive but does have a high level of Zinc which is important. I did a sur...
by John ball
Sun Jan 26, 2020 5:43 pm
Forum: Technical
Topic: HD8 carb issue
Replies: 67
Views: 7408
Great Britain

Re: HD8 carb issue

Hello Steve, yes I do have HD8’s. I have owned cars with SU carbs since 1973 and had my first E Type aged 23 in 1977. The change to 2” carbs on a 120 is a quite often fitted modification. I know the H6’s well as they are fitted to my Healey 100 and have the 0.100 jets as apposed to the 0.125 jets. I...