Sorensin Posted December 8, 2009 Share Posted December 8, 2009 I've just rebuilt a 1600 xflow, pretty much replaced everything that can be replaced and had most surfaces machined. It has a lumpy cam so i expected to run ruff but it barely runs It's ok at idle and low revs, runs like a dog and almost dies when the revs pic up a bit then seems to come better at higher revs. We timed the car to old timing points then took to a mechanic who retimed the car at about 20degrees advanced, runs as stated above, dizzy has slight play but dont think this is the cause of the problem. Have a new 32/36 carb which I dont think was adjusted by mechanic, this could be the cause of my issues? but looking for other suggestions as I have some doubts the carb tuning is to blame. Thanks Quote Link to comment Share on other sites More sharing options...
ThePog Posted December 8, 2009 Share Posted December 8, 2009 I would think that you need to index in the cam, not a hard job but tricky. You need the spec sheet that came with the cam to do it, there is no point guessing it..... http://www.angelfire.com/realm2/autotips/camdegree.html Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 8, 2009 Share Posted December 8, 2009 It could well be the carb but also cracked dizzy cap amongst a host of other things. You need to be a bit clearer than "when the revs pick up a bit". Could you guess as to what RPM? What is your location? (you don't have it as part of your profile) Quote Link to comment Share on other sites More sharing options...
Sorensin Posted December 8, 2009 Author Share Posted December 8, 2009 I'm from auckland, dont have a rev counter but it guess 4k maybe late 3000s? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 8, 2009 Share Posted December 8, 2009 Hmm. So it drives well below 2k, has a flat spot until 4k and then is fine? Quote Link to comment Share on other sites More sharing options...
ESKIN8R Posted December 8, 2009 Share Posted December 8, 2009 Using a 32/36 not suited to a 1600 engine? 3B and 5E are the only 32/36's suited to a 1600 engine Quote Link to comment Share on other sites More sharing options...
Sorensin Posted December 8, 2009 Author Share Posted December 8, 2009 Using a 32/36 not suited to a 1600 engine?3B and 5E are the only 32/36's suited to a 1600 engine I went to webber spec and brought a brand new carb said what engine size and cam i was running and he gave me what i hope to be a carb to suit. Cars at parents but will try find which 32/26 it is when I go round there. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 8, 2009 Share Posted December 8, 2009 If Murray Johnson told you the carb would be suitable then it probably is. Did you assemble the motor yourself? Quote Link to comment Share on other sites More sharing options...
Sorensin Posted December 9, 2009 Author Share Posted December 9, 2009 a friend and I did the assembling Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 9, 2009 Share Posted December 9, 2009 Good on you for assembling it yourself Hmm. So it drives well below 2k, has a flat spot until 4k and then is fine??Let me know ^. I am trying to help you but can'y quite anderstand your symptom Quote Link to comment Share on other sites More sharing options...
sholdowa Posted December 9, 2009 Share Posted December 9, 2009 My gut feeling ( and I do have a large gut! ) is that it's a spark problem. The main reason for that being that the 'inappropriate' 32/36 carbs have idling problems, not higher up the rev range. It could be fuel starvation ( worst one of these I had was getting the feed/return lines the wrong way round on an rs2000 - it was the one on the left in my avatar ), so check the filters as well. If you're running the original ignition, then try a few different capacitors ( after checking all the usual gaps ) - they can be buggered from new these days. hth, Steve Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted December 9, 2009 Share Posted December 9, 2009 did your cam need to be dialed in? That was my initial thought as well but if it flat spots it sounds like fuel.... A dyno would help or a vane Quote Link to comment Share on other sites More sharing options...
Sorensin Posted December 11, 2009 Author Share Posted December 11, 2009 My thought was it was the carb, rang weber specs and they thought it sounded like the carb so taking that in to be looked at asap. Quote Link to comment Share on other sites More sharing options...
forced Posted December 11, 2009 Share Posted December 11, 2009 If it's a carb problem (probably is) then it wouldn't be too hard to figure it out by having a look at the sparkplugs. Steve Quote Link to comment Share on other sites More sharing options...
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