Ignition

What ignition would be best to use when trying to use the timing retard to hook a little tire up. We are running a 451 hemi with fat heads and a PSID. We already have a mag 44, but is the digital 7 or 10 the better way to go.

 

doesn't the 44 put out the most power? if your retarding it to take power away, why wouldn't you stay with it? at some point during the run you'll want to put all the power to the track, and turn it back up.

 

If you have 7531 box or something simular you can use it to add and remove timing from the 44 mag. The best thing is yo can do indivdual cylinder timing. I have used it for two years without any problems.

 

7531 w/ 44 is the way to go

http://www.msdpromag.com/pdf/Addendum_%207531.pdf


http://www.msdpromag.com/pdf/7531_to_promag.pdf

 

Answer with a question

How about using a MSD #8168 retard box? You could put changable retard chips, and bring it in or out as you desire. It's less tunable, but seems simpler than the above mentioned equipment.

 

How would this work????

If you use the digital 7 how would you use it to pull timming out on the hit (intial 22-26 retard 10-15 out)then put the timing back in going down the track (2-5 degree increments).

 

Look at the diffrent progmable boxes. A few of them will record the run. This will not do EGT's or anything just ING items. To answer your other ? . You set your total timing you want 28 Deg. It will do an aoutomatic start retard if you want it to. Then you just plot your graph, it is a time/deg ploting chart. It is really easier than it sounds. You can also save runs so if you like it and have the weather and track data you can just load it and not have to replot if you make a change. I have several set ups for most of the tracks I run.

 

Mike Canter is so rite I was talking to a ta/d owner last week and we started to talk about timing and I was told also 1deg. could rob as much as 80 to 100 hp.so timing is very important

 

???????

Hey thanks for the help so far. Still a little confused on how to make the digital box work with the 44 and how to make the digital work with a air throttle control. With the fat heads what is the lowest timing we could run and whats is the most. Once again thanks for the help, this is a great site.

 

Wire the box up exactly as the instrucitons say. Go to MSD website and download the MSD software for the 7531 and go to the help section. it will show you how to program the box for retards, etc. I pull as much as 15 degrees timing out at the starting line and ramp it back in over 2 seconds and leave at half throttle. not sure what you mean by using air throttle w/ digital control. they are independent of each other but can be used in tandem. Call me at 214-724-1056 I run a blown motor on 10.5's.