Stock coils provide enough spark?
12-26-2006, 04:06 PM
#1
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Stock coils provide enough spark? I have been trying to figure out whether the stock coils have enough in them to provide solid spark under heavy boost. I hate to shell out for the MSD's unless they will provide a big advantage.
I have a YSi on a more or less stock displacement motor. Small pullies, should be a good amount of pressure. I have searched on this, new opinions would be good to have though.
I fogot to mention, the coils are relocated, fairly far away from the plugs.
I have a YSi on a more or less stock displacement motor. Small pullies, should be a good amount of pressure. I have searched on this, new opinions would be good to have though.
I fogot to mention, the coils are relocated, fairly far away from the plugs.
12-26-2006, 04:13 PM
#2
FormerVendor
We ran stock coils on a recent build that made 820rwhp through a T400.
On 1000+rwhp builds we use the truck coils.
Dwell time is raised to 6ms above 3200rpm, 13-14v with both stock and truck coils.
I wouldn't use the MSD's personally as I feel they are not necessary and the few that I saw were shorted out and leaking on the valve covers.
On 1000+rwhp builds we use the truck coils.
Dwell time is raised to 6ms above 3200rpm, 13-14v with both stock and truck coils.
I wouldn't use the MSD's personally as I feel they are not necessary and the few that I saw were shorted out and leaking on the valve covers.
12-26-2006, 04:54 PM
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Think of it this way, on a coil per cylinder V8, a coil have 8x the length of time AT ANY RPM to build a field (charge if you will) than the distributor guys go. There are lots of guys running distributors that make 4 digit numbers with boost. Obviously there is a lot more to it than that but you get the idea.
All things in good working order, I wouldn't worry about the ability of the stock coils fire the plug.
All things in good working order, I wouldn't worry about the ability of the stock coils fire the plug.
12-26-2006, 07:26 PM
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Originally Posted by INTMD8
We ran stock coils on a recent build that made 820rwhp through a T400.
On 1000+rwhp builds we use the truck coils.
Dwell time is raised to 6ms above 3200rpm, 13-14v with both stock and truck coils.
I wouldn't use the MSD's personally as I feel they are not necessary and the few that I saw were shorted out and leaking on the valve covers.
On 1000+rwhp builds we use the truck coils.
Dwell time is raised to 6ms above 3200rpm, 13-14v with both stock and truck coils.
I wouldn't use the MSD's personally as I feel they are not necessary and the few that I saw were shorted out and leaking on the valve covers.
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12-30-2006, 12:25 AM
#9
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Wheel To Wheel has a Yellow FIrebird with a 94MM Turbo making 21 PSI and 1500 RWHP and I know another Lae model Camaro making 1250 HP that used GM Truck Coils because they provide more spark. I like the MSD"S but if you are trying to fit everything in a budget the truck coil will handle almost anything on the street. LOL
