Weber 32/36DGV verses the Weber 38DGES

77celica
(stranger)
Fri Oct 28 2005
11:08 PM
yodta
(pooh bah)
Fri Oct 28 2005
11:56 PM
Sarge
(carpal tunnel)
Sat Oct 29 2005
12:44 PM
(I know this curve looks kinda funny, but this is how it comes in, there's nothing 'til around 14-1500rpm, then is comes in hard)
This distributor has 20? of advance built in. LC recommends 10? base which should give you 30? advance at 2000rpm, which is
what I'm getting. Then that's it -- it's maxed out.
My problem is the pinging, but if I retard the timing, the performance drops off. I'm thinking maybe the ignition curve is too
agressive with this distributor and is coming in too soon on the bottom end.
I also took off the flex-fan fan this morning and put the stock one back on. Much quieter Don't need the additional cooling now
that the cooler weather's coming on, but I the flex-fan made a noticeable difference in my A/C's cooling ability in drawing more air
across the condenser at idle.
Re: Weber 32/36DGV verses the Weber 38DGES
I am awaiting my engine transplant before I install my weber 38DGES. I am keeping my fingers crossed that I like it better than
my 32/36. I plan on selling the 32/36 to offset the cost of the 38/38.
I hope to get the engines swapped in the next couple weeks. I have household projects to tend to before I can play with the car.
Re: Weber 32/36DGV verses the Weber 38DGES
well, keep everything in your current setup until you're completely satisfied with the 38. you might end up like me and find out you
want to go back
I just got an email from a guy at LC Engineering. he think an adjustable cam gear might sort my pinging problem -- back my base
timing off and compensate with the cam gear.
I'm having a hard time understanding what happens if I retard my timing from 9? to say 5? to stop the pinging and then adding a
cam gear. what do I do? advance my cam timing to compensate?
I mean, what's happening? I retard the timing and the spark comes in later. If I were to do that with my current setup, with the
loss of power I experience at 5?, I would assume the valves are opening resulting in a loss of power, whereas right now, at 9?,
I'm getting preignition, and it's lighting the air/fuel charge before getting proper compression, banging before I'm at TDC, which
results in a loss of power as well, correct?
Re: Weber 32/36DGV verses the Weber 38DGES
Oh, boy. Where do I start?
Timing issues aren't any fun for sure . That distributor is the whole problem, look at the curve and relative rpm, there's the pinging
problem . The advance should be a bit more aggressive at a lower rpm at the same point as the transition circuits in the carb.
This way they match, when the carb is fairly rich for acceleration the timing will help it pull better. Your current setup is jumping
the timing up pretty high right where the carb will lean out for cruise. If you were running a 38DGAS or the DCNF , the curve
would better match the carb .
Cam timing has a pretty high effect. I use a high rpm/duration cam and have it advanced a couple of degrees to keep the
midrange torque up a bit . I would suspect you may be off a couple of degrees anyway. Never seen an aftermarket cam that just
happened to land dead on , most have to be corrected. Stock units are the same way, they are usually pretty close but never
exactly on. I had to change distributors again, the mechanical curve unit I built turned out to have a bad shaft. Just way too much
play in it to work correctly. Had no issues though with having the 36* of full advance at 3200, just the sloppy shaft . The curve
was relatively mild and even all the way up to that point , but I ran the initial base at 16* as a starting position and used a 20*
swing. Is this aftermarket unit of yours full mechanical or does it have a vacuum advance? I could see if it's vacuum that the
added advance may cause the pinging. Also, light jetting may cause the carb to temporarily go lean when you move the throttle in
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