Announcement

Collapse
No announcement yet.

Doing some stupid shit to an old datsun head

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    What brand oil pump was it that exerted pressure on the drive spindle that then rooted the crank drive gear?
    if you get this far after reading the above, good on you!
    If i make spelling mistakes, syntax errors, or just mss letters in words, it is because i am lw vision/vision impaired.
    Dont drive or race no more. Bit of a cunt of a thing.
    I cant see what keys my fingers hit when i type.
    Its called Cone and Rod Dystrophy, un fixable, i get worse, its a hereditary cunt f a thing.

    Comment


      Tony,

      I've seen similar modifications go from 36* of ignition advance to 27-28* (same size bore and fuel type).

      The nice part about this stuff, is that if you are so inclined, you don't have to rev the engine higher to make a ton more power. Mods like this improve the efficiency of both the ports and the combustion process. It's a win-win all around.

      Comment


        Originally posted by TK View Post
        Yup, if you're gonna get ping you'll get it 1st around peak torque, be carefull, if you can hear it it's more than a little ping!
        Hmm...if I hear some ping at 28, I'm now thinking maybe I dial it back a little further, from 26 to say 25 or 24.

        That would probably to too little advance at the bottom end, but I do have a locked-timing distributor I could use. Then it'd be 24BTDC all day.
        Japanese Nostalgic Car - Dedicated to classic japanese cars

        Comment


          Originally posted by Babalouie View Post
          Hmm...if I hear some ping at 28, I'm now thinking maybe I dial it back a little further, from 26 to say 25 or 24.

          That would probably to too little advance at the bottom end, but I do have a locked-timing distributor I could use. Then it'd be 24BTDC all day.
          She would struggle to turn over with 24btdc when trying to start I reckon.
          Originally posted by Rdyno
          70ynu has to be the most retarded cunt here. "Help me please" me "you need to remove your head" him "fuck off cunt I'm to lazy fuck off out of my thread you told me to do something I don't want to do so you're a cunt fuck off can some one please tell me an easier way???"
          Originally posted by Tripper
          Its a tight battle between you and rogercordia for the most retarded member on here, thou i think you have it by 5 window licks

          Comment


            Good point...MSD do make a box that 'tards the ignition 10deg during cranking tho
            Japanese Nostalgic Car - Dedicated to classic japanese cars

            Comment


              Originally posted by Babalouie View Post
              Good point...MSD do make a box that 'tards the ignition 10deg during cranking tho
              Put something like a proper optical ignition kit into it. Full mechanical advance and maybe vacuum as well. It'll look exactly the same from outside and work a hell of a lot better.

              Comment


                Doing some stupid shit to an old datsun head

                Originally posted by Billzilla View Post
                Put something like a proper optical ignition kit into it. Full mechanical advance and maybe vacuum as well. It'll look exactly the same from outside and work a hell of a lot better.
                Current setup is Hall effect electronic dizzy, recurved by Stewart Wilkins (14deg mech advance all in by 2700)...the locked-timing one is a nice Kameari Engine Works one that is optical tho
                Japanese Nostalgic Car - Dedicated to classic japanese cars

                Comment


                  Originally posted by Babalouie View Post
                  Current setup is Hall effect electronic dizzy, recurved by Stewart Wilkins (14deg mech advance all in by 2700)...the locked-timing one is a nice Kameari Engine Works one that is optical tho
                  These guys do a USB programmable unit (it's all inside the dizzy) - by playing some tricks with the ignition timing around idle you can stabilise the idle during warmup.
                  http://www.123ignition.nl/products.php

                  They don't list nissan/datsun, but an email is free - modifying one of the other 6cyl units might get you there.
                  "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

                  Comment


                    At 650$ US, the 123 dizzy is spendy. I can't find a single person using it on the Datsun, though the US distributor seemed keen to try selling them on Hybridz.

                    Comment


                      There's a few guys using them over on the Alfa forums - they love them, and I'm > < this far off pulling the trigger on one.
                      Spendy? compared to a flogged out stocker that needs rebuilding and can only be curved to what the bobweights and springs can let you do? sure.
                      Compared to other fully programmable options?
                      "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

                      Comment


                        Lots of MGB owners are using them too - becoming very popular.
                        I might look at one for the Bugeye...

                        Originally posted by Gammaboy View Post
                        There's a few guys using them over on the Alfa forums - they love them, and I'm > < this far off pulling the trigger on one.
                        Spendy? compared to a flogged out stocker that needs rebuilding and can only be curved to what the bobweights and springs can let you do? sure.
                        Compared to other fully programmable options?
                        Classic Auto Fabrications:
                        https://www.facebook.com/pages/Class...88753937823811

                        http://www.lescollinsracing.com/

                        Comment


                          Currently at 237hp @ 7250rpm, still tuning.

                          Comment


                            Hey tony, has the compression gone up from what it was previously?

                            It's 14:1 now - before was?

                            Just curious about the reduction in ignition advance requirement.

                            Is all of it attributable to the chamber shape, or can a compression increase be responsible for some of the reduction?


                            The head for this motor looked fantastic in person. The pictures really don't do it justice.

                            One of the most impressive of Tks skills is his fine motor control and repeatability when doing the grinder work on ports and chambers.

                            Anyone can learn to set up a mill, tip grind a valve, cut seats, put stuff in a lathe, use a torque wench etc etc. The difference with the hand working he does is that it has literally taken hundreds or maybe thousands of hours to have developed the fine motor control to where it is now.

                            Where i have noticed it most is not so much his ability to make a single port or chamber nice, but the ability to do one to the shape dictated by the flowbench and then proceed to copy that across the remaining 3, 5, 7 cylinders. He does this without anything more than a set of simple point feelers to spot check port width here and there and a junk pushrod to check that a wall is flat - (Which it usually is to within less than a mm already).

                            The big cathedral ports on the ls heads are where his ability to get them totally flat is crazy. I use his grinder and his cutters, but anytime i try to get something flat it ends up looking like the surface of the moon. Plus he's usually come over for a look and laugh at me as i feather the throttle like a 7yo on a trailbike.

                            In addition he'll also do stuff that nobody else will. Case in point was a split bore in a 2004 or so m3 block.

                            Whilst i was there last year incomptently using his machines to make some crown parts, i watched him patch the big vertical crack with 'stitching plugs' (which i'd never even heard of before), then order the sleeve.

                            As the sleeves themselves apparently vary in diameter he couldn't set the boring machine up to get the 2thou clearance until he'd measured it. Once the sleeve rocked up he measured it and from there he bored it out, and then jammed the sleeve in.

                            That was all good, but it was then evident that the adjacent bore was also cracked, so the process was repeated again. I was able to assist with some hammer blows as that's all he would let me do lol.

                            Of course 10+ stiching plugs in two adjacent bores and two sleeves belted in meant that the okay bores adjacent are now out of round as well, so all 6 bores were then given a final 0.5 mm overbore.

                            Finally, to combat future cracking the block was then given a partial grout fill.

                            From memory this took a day and a bit, but no longer than that. I did help, but my half a dozen hammer blows and dodgey plastic funnel for getting the grout in was the grand extent of it.

                            I've been fucking around with cars since i was 15 - which is 25 years now, but i regularly see Tk doing stuff that I've either never seen in person or never even heard of before. Whilst there are blokes on here that have seen it or done it, they are very few in number and generally in their 40s at minimum. Sadly as well there are virtually no young people learning this stuff.


                            END WALL OF TEXT

                            Cliffs
                            SUPERCROWN 4 TK 4 EVA
                            Adjustable cam gears for 1FZ-FE now ready for sale - 10 degrees advance/10 degrees retard. Suitable for all variants of 1FZ-FE.

                            (adjustable scissor gear for changing separation angle between the intake and exhaust cams coming soon)

                            International sales welcome - PM me for pricing.

                            Comment


                              LOL, cheers man, see you Saturday!

                              PS - figuring from # of port jobs done & average hours per job I figure I've spent about 8000 hrs on the grinder......

                              Comment


                                Still waiting on more numbers, but 237hp @ 7250 = 116% VE, getn er done!

                                Comment

                                Working...
                                X