Here are my thoughts on the product and I'm offering actual results.
Installation: Pretty straight forward. Not sure why Granatelli felt a need to reverse the polarity, but that is not difficult and didn't take much time.
They provide you coil cover spacers and I'm not a fan of them. They press into the coil cover and don't seal the OEM coil cover section that allows the wiring to enter the coil cavity. The spacers hardly hold the stock gasket in place and that presents a headache when trying to reinstall them. I used a little rtv to hold them in place. The spacer itself leaves a huge gap where the wiring enters the coil cavity and the gasket is left to flop left or right and not seal properly. I can only imagine the condensation build up under there now.
After changing the polarity, putting the coils in place, no issues. Putting the coil covers back on was an issue, but I can live with that. However, no where in any of the directions on any site that I've found does it tell you that the stock bolts that hold the coil cover on valve cover need to be replaced. They are too short. Nothing like having your only mode of transportation disabled so you can't get yourself the replacement bolts! That really pissed me off and I have to say that Granatelli could have just tossed those replacements in with the package. If you offer a kit, then it should come with what you need to complete the swap. Very poor if you ask me.
Actual results: Idles smooth. Throttle response might be better but not significantly. Took the car for a drive and I can't say that I noticed anything different. Next day, time to dyno and see if you get their 15hp gain for n/a cars and up to 35hp gain for supercharged cars. My previous dyno presented 434. Dyno with Granetelli COP's, 436. 2hp gain. Not enough of a gain for me to say that the gain wasn't due to air conditions or something else.
For $400, I'm not seeing any benefit. I'm going to play with the plug gapping. Stock gapping says .042, I'm going to try .050 and see if these 60,000 volt COP's can give me anything.
There is a video on the Granatelli site as well as American Muscle site that shows the swap and I cannot believe that they didn't leave steps out. They don't use the coil spacers. If you don't, the cover is not deep enough to allow for the angle of connectors (the stock are straight, Granatelli's are on an upward angle). If you were to attempt to put the coil cover back on without the spacer, you would damage the coil connectors. They even state that no spacer is necessary in the video!!! Maybe a difference between the Ford GT valve cover and the Cobra valve cover? I doubt it, but possible. And there is NO mention of the polarity swap. They got a hp/tq gain and I didn't see any.
I'm not bashing Granatelli, but their kit is not complete and I'm not seeing the results they claim. That is my opinion and my actual results.
Installation: Pretty straight forward. Not sure why Granatelli felt a need to reverse the polarity, but that is not difficult and didn't take much time.
They provide you coil cover spacers and I'm not a fan of them. They press into the coil cover and don't seal the OEM coil cover section that allows the wiring to enter the coil cavity. The spacers hardly hold the stock gasket in place and that presents a headache when trying to reinstall them. I used a little rtv to hold them in place. The spacer itself leaves a huge gap where the wiring enters the coil cavity and the gasket is left to flop left or right and not seal properly. I can only imagine the condensation build up under there now.
After changing the polarity, putting the coils in place, no issues. Putting the coil covers back on was an issue, but I can live with that. However, no where in any of the directions on any site that I've found does it tell you that the stock bolts that hold the coil cover on valve cover need to be replaced. They are too short. Nothing like having your only mode of transportation disabled so you can't get yourself the replacement bolts! That really pissed me off and I have to say that Granatelli could have just tossed those replacements in with the package. If you offer a kit, then it should come with what you need to complete the swap. Very poor if you ask me.
Actual results: Idles smooth. Throttle response might be better but not significantly. Took the car for a drive and I can't say that I noticed anything different. Next day, time to dyno and see if you get their 15hp gain for n/a cars and up to 35hp gain for supercharged cars. My previous dyno presented 434. Dyno with Granetelli COP's, 436. 2hp gain. Not enough of a gain for me to say that the gain wasn't due to air conditions or something else.
For $400, I'm not seeing any benefit. I'm going to play with the plug gapping. Stock gapping says .042, I'm going to try .050 and see if these 60,000 volt COP's can give me anything.
There is a video on the Granatelli site as well as American Muscle site that shows the swap and I cannot believe that they didn't leave steps out. They don't use the coil spacers. If you don't, the cover is not deep enough to allow for the angle of connectors (the stock are straight, Granatelli's are on an upward angle). If you were to attempt to put the coil cover back on without the spacer, you would damage the coil connectors. They even state that no spacer is necessary in the video!!! Maybe a difference between the Ford GT valve cover and the Cobra valve cover? I doubt it, but possible. And there is NO mention of the polarity swap. They got a hp/tq gain and I didn't see any.
I'm not bashing Granatelli, but their kit is not complete and I'm not seeing the results they claim. That is my opinion and my actual results.
Last edited by a moderator: