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Re: Help! Did my MSD digital 7 die?
[Re: fast68plymouth]
#2693933
09/03/19 12:01 PM
09/03/19 12:01 PM
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Joined: Nov 2011
Posts: 287 PA
Harry's Taxi 2
enthusiast
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enthusiast
Joined: Nov 2011
Posts: 287
PA
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I was able to try out the new 150# seat-440# open springs this weekend and that was the problem with the 6600 rpm limit......it went to 7100 without a hiccup.
Now as for being any faster, it didn't seem to add much to the power level yet. I can at least test shift points now and the fuel curve, while needing some tweaking, is now making sense too.
It did equal my best previous e.t of 9.12 in 60* 1800 D.A. weather a few months ago. It was 80* 2200 D.A. on Saturday's test session.
Thanks (fast68plymouth) for the spring pressure advise .
'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.
NOS-used when losing since 1940.
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Re: Help! Did my MSD digital 7 die?
[Re: Harry's Taxi 2]
#2694022
09/03/19 04:56 PM
09/03/19 04:56 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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I was pretty sure it needed more spring. Glad that worked out for you.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Help! Did my MSD digital 7 die?
[Re: fast68plymouth]
#2694324
09/04/19 12:27 PM
09/04/19 12:27 PM
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Joined: Nov 2011
Posts: 287 PA
Harry's Taxi 2
enthusiast
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enthusiast
Joined: Nov 2011
Posts: 287
PA
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I'm actually more disappointed that I didn't think to look into spring pressures more and question Mike Jones about it. I've been very pleased with his cams....I guess he just made a mistake as any of us could have.
I looked (in hindsight) at pretty much every catalog cam of similar size (and smaller w/.842 lobes) and they all recommend over 400# of open pressure.
'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.
NOS-used when losing since 1940.
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