44 Amp Mag , running time.

I had. Friend call today , he asked if I had ever heard of a points box going bad after a couple of minutes continuous running , he has been told its a known issue.

Has anyone experienced this ???

 

I'm thinking there are Bonneville cars running them successfully for extended periods ---

 

That was my response too Mike , the story is that a twin pro charged "street motor" running a 44amp mag , has a problem with the points box. This is all on the Dyno.

 

About a year ago I contacted MSD and asked to talk to someone in the Mag shop. I said I was interested in running a 44 pro mag for extended periods of time. He ask me how long is extended and I said 2 to 3 minutes. He told me the mag would probably be OK for that amount of time, but no way would the box survive. He said that in the shop they have had boxes explode do to overheating, and that there really was no way to keep the box cool even with extensive heat sinks.

Also I was talking under load and not at an idle or motor warm up type deal. He recommended that I look into hopped up 12's converted to 20 amps and put lots of heat sinks on the boxes and in an area that gets good airflow.

Disclaimer, this information is one year old.

Tom

 

I have had one go bad and I was told that it got run too long and overheated it.

 

Thank you for all the replies , very helpful.

Thanks for the site Will


Wayne

 

That's exactly the car I was thinking of in my earlier post------------------the other issue that used to be talked about but isn't too much is the ground wires used from the heads , block to a common ground with the box and coils which what was supposed to help the box problem years ago --- does the OP have ground wires on his car ?

 

Thanks Mike. I don't know why the tech guy told me what he did but that is the story I got.

As far as the Roadster at Bonneville goes I saw a video of the record run. The warmup before being pushed off was 1 minute. Also even though they were on the five mile course, they only ran 3 miles, and the reason was that their fuel tank was not big enough to go any farther. The total time for that particular run with the warmup was probably around 3 minutes, maybe less. Also on the record run Dave Davidson was the driver.

You can read more at http://www.paradisepost.com/news/ci_16314624

Tom

 

We covered the ground wire situation , and that is ok. I speak from personal experience with that issue.

I have some in car footage of a run we did here at Santa Pod . The overall run time was 3.15. We do spend a long time warming the car up in the pit , usually have the oil up to 150 before starting and get it to 180 , then switch the motor off. Iam going to time it next time round.

 

Hydroplane Racing here with that MSD Pro Mag stuff , 5 minutes warm up going around the 1 miles course and then another 4 laps for the race , 10 to 12 minutes running time with no problem. Blown BBC burning up to 30 Gal of Methanol for a single race !!!!

Hope this help !!!

Serge........

 

Hey Serge,
Long time no see,
hows it going?
PM me before some one yells at me!
Gene.

 

plugs

Gene now that you brought up about N57drs I have a few that never seen spark I guess they should be worth a beer each?

 

Counterfit NGK Plugs

http://www.ngkbusi.com/index.php/nws/15-ep

Some a$$hole always got to make me crazy.