Timming
10-26-2008, 01:16 AM
#1
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Join Date: Oct 2006
Posts: 16
So i just rebuilt my 13b 4 port gsl se that was running before in my datsun510. I rebuilt it because it overheated. Anyways i put the engine together with new seals the works from atkins and im trying to sort out some bugs on the car becuase when i drive or rev the car it starts to miss around 3.5k. The car has about 200 miles, but i can't get the timing right, i know that the pulley needs to be at the first TDC mark and the key way in the crank needs to be at 9 oclock. Then you line up the dots on the distributor shaft and slide it in and i always it up right. But when i start the engine and go to time the car, the timming is off. I have tried to time it about 7 times and i dont get it. Also on my distributor cap, the terminal where the trailing coil plugs into is burned on the inside side of the cap. Why would it burn because it sems like when i put a new cap on it that it will just burn that terminal. The car runs good when you drive it kepping it under 3.4k, but if you try to accelerate to 4k it will start to miss around 3.5k, and i know the timing is off because i cant get the mark to line up. soooo.... car is equiped with holley from racing beat, porting, racing beat header and exhaust, distributor but without the points...
Im going to try putting the distributor in with the dimples aligned so it will be a tooth forward and then a toothbackwards if i have to and try to time the car like that. But then if the car times on the right marks like that then how come its like that when it shouldn't be. Any input would be great. Im going to get some pictures up here soon.
[attachment=45097:IMG_0394.JPG]
This is an old picture, when i had just put the engine in, about 2 months ago. before the car was running. koyo 3rd gen rx7 radiator with spal fan installed, and 1st gen oil cooler.
Im going to try putting the distributor in with the dimples aligned so it will be a tooth forward and then a toothbackwards if i have to and try to time the car like that. But then if the car times on the right marks like that then how come its like that when it shouldn't be. Any input would be great. Im going to get some pictures up here soon.
[attachment=45097:IMG_0394.JPG]
This is an old picture, when i had just put the engine in, about 2 months ago. before the car was running. koyo 3rd gen rx7 radiator with spal fan installed, and 1st gen oil cooler.
10-26-2008, 07:30 PM
#3
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Join Date: Oct 2006
Posts: 16
Originally Posted by ArmyOfOne' post='910585' date='Oct 26 2008, 05:54 AM
Did you make sure that you put the timing gear on correctly when you reassembled the "front stack"?
Is the distributor locked?
Are you using an actual timing light?
Is the distributor locked?
Are you using an actual timing light?
distributer is not locked, and i am using a timming light. The gears only go on one way if im right, because everything has to line up in the key way. You just have to worry about stacking the parts and bearing right which i did.
10-27-2008, 11:01 AM
#4
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Join Date: May 2002
Location: California
Posts: 22,465
the dizzy gear has a bevel on one side, and that faces the rear of the engine. it is possible to put it on backwards, not really sure what that does to the timing.
also when you line up the marks on the dizzy, its not too hard to knock it a tooth off installing it, that might be the problem...
if it was my car, and you're sure the timing marks on the pulley are right, then id just put the dizzy in until it was right.
also when you line up the marks on the dizzy, its not too hard to knock it a tooth off installing it, that might be the problem...
if it was my car, and you're sure the timing marks on the pulley are right, then id just put the dizzy in until it was right.
10-27-2008, 07:06 PM
#5
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Join Date: Jul 2008
Posts: 28
1 turn motor to tdc
2 line dots up on dizzy and fit(dont fit vacume lines to dizzy leave them blocked off at this stage)
3 start engine (at this stage timing will be wrong)
4 attach timing light to leading no1 check and adjust
5 attach timing light to trailing no1 check and adjust
6 with vacume lines still disconected rev engine and check mechanial advance works
7 use a mtivac or similar conect to dizzy vacume line and check vacume advance
8 hook up vacume lines close bonet and spin wheels
9 if bp motor lock mechanical and vacume set timing around 18 (may want to check that 18 may be wrong)
if still not good repost ill sort you out
11-06-2008, 04:57 PM
#7
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Join Date: Oct 2006
Posts: 16
Originally Posted by hksthor' post='910676' date='Oct 27 2008, 04:09 PM
by the way what porting cause that is critcal to decide on timinig bp you lock leading and trailing together and lock mechanical advance so its solid and dont use vacume advance
My car has a streetport, Anyways i timmed my car the way you told me to and its timmed right. But i still have a problem with it. My car still wont rev about 4k. Around 3.5k it starts to miss. I dunno what to try to replace. I do know that at idle both my leading and trailing plugs are all firing, I tested that by using my timming light and veryifing that the plugs are firing. Im thinking that maybe i have a bad coil? or maybe some bad wiring from swaping the engine into my datsun510? Car runs good untill you try to get it past 4k, any suggestions?
11-07-2008, 01:17 PM
#9
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Join Date: Oct 2006
Posts: 16
Originally Posted by j9fd3s' post='911287' date='Nov 7 2008, 08:25 AM
fuel filter?
fuel filtre and fuel pump are good. By the way im running a racing beat carb with a holley blue pump, I think my problem is more ignition related, or some wiring issue.