yoeddynz Posted April 10 Share Posted April 10 On 31/03/2024 at 20:30, NickJ said: Also those are very nifty relays that I really should have on a few cars.... But I won't actually be needing because I'm going to put efi on everything and live like a boss. 1 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 10 Share Posted April 10 This engine here... Which I think might be a Covair air cooled flat six ( @NickJ dad can confirm) If so then how would that work properly with 4 carbs? Like how is the mixture evenly distributed? Quote Link to comment Share on other sites More sharing options...
tortron Posted April 10 Share Posted April 10 One dummy carb on each side. It's a street rod m9 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 10 Share Posted April 10 Some fella from the group commented on the photo and said two carbs are for primary fueling, the others for secondary. Seems a bit complex? 1 Quote Link to comment Share on other sites More sharing options...
Nominal Posted April 10 Share Posted April 10 Might be on a progressive linkage? 1 Quote Link to comment Share on other sites More sharing options...
Nominal Posted April 10 Share Posted April 10 Same setup as a Holden twin carb I suppose 2 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 10 Share Posted April 10 That just makes my brain hurt. 1 Quote Link to comment Share on other sites More sharing options...
GregT Posted April 10 Share Posted April 10 It's not optimum - but it does work. The flat 6 won't have a lot of overlapping vacuum so distribution should be good enough. From experience with a 36/36 Weber on a hot 202, the volume of the main log of the manifold is fairly critical. Too small and the ends starve. Too big and response goes away. 3 Quote Link to comment Share on other sites More sharing options...
NickJ Posted April 10 Share Posted April 10 6 hours ago, yoeddynz said: codswallop Sorry sun, ol mate Skinner has me sorted 2 1 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted April 10 Share Posted April 10 1 hour ago, NickJ said: Sorry sun, ol mate Skinner has me sorted just make sure you fill the dashpots with ep90 for max fuel on acel 1 Quote Link to comment Share on other sites More sharing options...
JustHarry Posted April 17 Share Posted April 17 On 10/04/2024 at 15:54, yoeddynz said: Some fella from the group commented on the photo and said two carbs are for primary fueling, the others for secondary. Seems a bit complex? No worse than pontiac tri-power. 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted April 19 Share Posted April 19 https://xkcd.com/2916/ 1 Quote Link to comment Share on other sites More sharing options...
gibbon Posted April 19 Share Posted April 19 quick question, are the rod and head bolts on the old 4G63 reusable or one and done? @fuel @bigfoot Quote Link to comment Share on other sites More sharing options...
bigfoot Posted April 19 Share Posted April 19 23 minutes ago, gibbon said: quick question, are the rod and head bolts on the old 4G63 reusable or one and done? @fuel @bigfoot Quick look through my workshop manual doesn't say to replace them 1 Quote Link to comment Share on other sites More sharing options...
gibbon Posted April 19 Share Posted April 19 hmm I've found a manual too and it doesn't say replace, but the torque figure is 20NM plus 180 degrees, isn't that a hallmark of torque to yield bolts? 2 Quote Link to comment Share on other sites More sharing options...
gibbon Posted April 19 Share Posted April 19 stuff it, a whole replacement set is like 80 bucks lol. cheap insurance edit: $40 bucks through Segedins 1 Quote Link to comment Share on other sites More sharing options...
fuel Posted April 19 Share Posted April 19 depends on the age I guess - the older 6 bolt 4G63s had reusable hardware but the modern stuff (ie Evo 4 style onwards) tends to be TTY 1 Quote Link to comment Share on other sites More sharing options...
bigfoot Posted April 19 Share Posted April 19 Mine says head 95nm Rods 52nm As @fuel said, you may have a late model manual 1 Quote Link to comment Share on other sites More sharing options...
gibbon Posted April 19 Share Posted April 19 ah, I think I probably do... I just saw "sohc 4g63" and figured it was the old model but of course they probably kept building them forever. Oh well now i have a set of new TTY bolts on the way, I suppose I'll use them - the engine was rebuilt not that long ago, can't be sure that the head bolts that went in at that time weren't TTY too Quote Link to comment Share on other sites More sharing options...
igor Posted April 19 Share Posted April 19 Is there any engineering benefit to the use of TTY bolts? Quote Link to comment Share on other sites More sharing options...
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