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Old 02-06-2011, 06:18 PM   #1
naughts
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Default Anyone using a MSD 7AL?? Question

Anyone using a MSD7AL or MAS7AL-2 ignition??
I have borrowed a 7AL-2 to try at Heathcote on the 11th. will run my normal ignition, then swap to the MSD to see if there is any difference in performance.
Only problem is the limiter chips are 6000, 6200, 6400 and 6600. I cross the line at 7000-7200 rpm.

Firstly, What happens when you dont have a limiter chip installed? Will it just have no limiter, or will it not work at all?

Secondly, If anyone has a 7000RPM or above chip and coming to Heathcote on the 11th, can I borrow it?????
Naughts

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Old 02-06-2011, 08:56 PM   #2
xagsjoe
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Default Re: Anyone using a MSD 7AL?? Question

It will run fine without a chip, that was how I ran mine at the May meet we had last year. 7al-3 can be had for good $$$ stateside and have heaps of features.

I sold all my MSD gear a while back and went to a crane box. No chips left sorry mate. If you go MSD I still have an adjustable 3step for sale. PN 8735
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417ci CHI headed XD.
Dynamic transmissions C4
Track times
60ft pb 1.365 (24-3-12)
10.173 @ 134.97mph 1/4
6.324 @ 108.93mph 1/8th PB

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Old 02-06-2011, 08:59 PM   #3
naughts
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Default Re: Anyone using a MSD 7AL?? Question

Joe, can I use my existing electronic coil for a trial, or will the MSD damage it.
Just a oil filled Electronic coil it is.
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Old 02-06-2011, 09:21 PM   #4
Ivan
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Default Re: Anyone using a MSD 7AL?? Question

Quote:
Originally Posted by naughts
Anyone using a MSD7AL or MAS7AL-2 ignition??
I have borrowed a 7AL-2 to try at Heathcote on the 11th. will run my normal ignition, then swap to the MSD to see if there is any difference in performance.
Only problem is the limiter chips are 6000, 6200, 6400 and 6600. I cross the line at 7000-7200 rpm.

Firstly, What happens when you dont have a limiter chip installed? Will it just have no limiter, or will it not work at all?

Secondly, If anyone has a 7000RPM or above chip and coming to Heathcote on the 11th, can I borrow it?????
Naughts
All the chip is is a resistor. Make your own or do what I have done and fitted a 10 turn trim resistor. I just use a multimeter to set the resistance for the appropriate rev limit.






RPM Ohms RPM Ohms RPM Ohms RPM Ohms
100 10.8 2600 1592 5100 3691 7600 6406
200 10.9 2700 1668 5200 3791 7700 6517
300 11 2800 1744 5300 3877 7800 6649
400 11.1 2900 1820 5400 3979 7900 6782
500 11.7 3000 1896 5500 4082 8000 6897
600 101 3100 1978 5600 4171 8100 7034
700 191 3200 2049 5700 4277 8200 7171
800 274 3300 2132 5800 4383 8300 7291
900 354 3400 2215 5900 4475 8400 7432
1000 432 3500 2288 6000 4584 8500 7575
1100 506 3600 2373 6100 4693 8600 7699
1200 580 3700 2460 6200 4788 8700 7845
1300 653 3800 2534 6300 4901 8800 7994
1400 724 3900 2622 6400 5014 8900 8122
1500 795 4000 2710 6500 5112 9000 8274
1600 867 4100 2787 6600 5232 9100 8428
1700 937 4200 2877 6700 5349 9200 8561
1800 1010 4300 2969 6800 5449 9300 8719
1900 1081 4400 3048 6900 5569 9400 8879
2000 1152 4500 3141 7000 5689 9500 9018
2100 1224 4600 3235 7100 5793 9600 9182
2200 1297 4700 3316 7200 5919 9700 9348
2300 1370 4800 3412 7300 6043 9800 9491
2400 1444 4900 3509 7400 6150 9900 9662
2500 1518 5000 3592 7500 6277 10000 9834


So for a 7000rpm you need a 5689 or a 5.6Kohm resistor


Ian
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Old 02-06-2011, 09:23 PM   #5
naughts
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Default Re: Anyone using a MSD 7AL?? Question

thanks Ian
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Old 02-06-2011, 11:41 PM   #6
xagsjoe
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Default Re: Anyone using a MSD 7AL?? Question

Yeah Naughts I think you should be fine. I have used a xe coil with a 6AL before today with zero issues. The BEST coil for race use is the MSD Pro Power coil with the 7series ignition.
__________________
417ci CHI headed XD.
Dynamic transmissions C4
Track times
60ft pb 1.365 (24-3-12)
10.173 @ 134.97mph 1/4
6.324 @ 108.93mph 1/8th PB

SOLD
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Old 03-06-2011, 10:18 AM   #7
greencapri408
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Default Re: Anyone using a MSD 7AL?? Question

naughts ill happily lend you a pro power coil as long as it still works all my cars and parts went under in the floods, i shut the shed door and havent looked at them since
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Old 03-06-2011, 06:34 PM   #8
naughts
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Default Re: Anyone using a MSD 7AL?? Question

Quote:
Originally Posted by greencapri408
naughts ill happily lend you a pro power coil as long as it still works all my cars and parts went under in the floods, i shut the shed door and havent looked at them since
Damm, thats a pity to hear. hope the damage is fixable.
You heading to H'cote on the 11th??
If not, i'll give it a go with the coil thats in it now. I'll take a spare just in case!!!
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Old 04-06-2011, 10:44 AM   #9
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Default Re: Anyone using a MSD 7AL?? Question

I may go for a look on the 11 th but no racing, i wouldn't even know if the Capri would start any more as the water was up to the injector hat. I'd think everything will need rebuilding engine, diff, gearbox because when the water finally went down all the oil was on the concrete the water had filled the sump. I really need to do something one day as i have alot of money rusting away
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