Paul,
I'd not use 24 volts, as the starter is not designed to handle that
voltage load and could in fact burn out along with some of the
ignition components. There may be other problems with the starter
system, such as voltage drops where you do not want them.
I just got my rebuilt 91 Nissan 4cyl truck engine back in and after
sorting out a few dumb mistakes, the engine did fire, but after it
was warm, the starter would not turn it over. I went through the
process of taking he starter out, checking all the connections,
making sure all were connected well, and it still would start the car
when cold but not when hot. I got concerned because I thought maybe
there was binding in the engine when warm, so I took the plugs out
after it was warm and would not start and yes, it would turn over
fine. So back went in the plugs and it did start! I shut it off
and it would not spin enough to start. Now the starter had 240k+
miles on it and last summer a time or 2 it acted real sluggish. since
I had good connectivity, I got a rebuilt starter and put it in (I'm
real good at changing starters on 4cyl Nissan pu's now ;-) ) and
voila....there is no problem now.
So, if your engine spins fine w/o the plugs and has good turn over
speed, it may be the connections are not good enough or the battery
may not be up to snuff for the engine with the plugs in. Or the
connections you have do make enough contact to handle the load a
"compressed" engine has. Is there a way to make a real positive
connection to a really good battery ? Like the normal battery terminal clamps?
Doug
At 08:56 PM 3/19/2006, you wrote:
>Although my freshly rebuilt TR4 engine turns over well with the spark plugs
>out (and builds up to 20psi after about 10 seconds of cranking), if you put
>the plugs in its quite a different story. In fact, with the plugs in it
>will only turn over 3-4 times. With jumper cables from my truck's battery
>togather with a freshly charged 'jump box' it was still too heavy a load to
>start my new engine.
> Tomorrow I was also planning on using another vehicle with more jumper
>cables. If this fails to be enough juice then I might hook up two of the
>batteries (red to black)(I forget if this is parallel or series) but it
>would yield 24volts. Since I've only got the starter and coil wired up,
>what would be the harm of doing this?
>
>Thanks,
>Paul Dorsey
>60 TR3A
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