[rookerrobert]

The one I bought had 55,000 miles on it from a car lot. So I cant find out who owned before me and it some mods that are visible. The car car real well but you can tell it needs to be tuned. The guys that are trying to tune it dont know if there anything internal like maybe a cam installed. I had to change out the injectors it had 525cc and they were maxing out. I went with Demon injectors and the tuner is trying to get the fuel closer but having trouble not knowing the history of the car. So my hats off to the guys do the tuning on our car having to deal with those issue's and the public in general. My question is can you find out if the cam has been changed without pulling the engine apart?

Thanks

 

[baabootoo]

Well, NOT being an expert on these engines, maybe measure valve lift? I'm not sure how easy that is though.

 

[Frosty]

I highly doubt a cam change was done. Not a lot of gain for our cars till you start shooting for big power and those cams would be obvious.

I assume its being remote tuned? I ask because once it's on a dyno the tuner should be able to fine tune based off the data seen. Needing to know what's been done normally is needed for the base tunes to get things close to start with.

 

[rookerrobert]

I highly doubt a cam change was done. Not a lot of gain for our cars till you start shooting for big power and those cams would be obvious.

I assume its being remote tuned? I ask because once it's on a dyno the tuner should be able to fine tune based off the data seen. Needing to know what's been done normally is needed for the base tunes to get things close to start with.

yes sir you are correct....I also think it's stock cam I have friend that has 16 just like mine and I know it's stock. But the problem mine having those lt headers and super 10 flowmasters it's so darn loud it's hard to tell.....but you can still tell there's not much lope it just sounds stock just loud. I think the tuner is having trouble with the fuels trims being to wacky acting....and A firend of mine seen logs on mine a couple month's ago and said the same.

 

[rookerrobert]

Well, NOT being an expert on these engines, maybe measure valve lift? I'm not sure how easy that is though.

yep but there's so many variable's trying that way. And would have to be precise also.

 

[Frosty]

Hearing wacky fuel trims and that you had to go Demon injectors sparks a thought that maybe your issue is fuel pressure related. Before I say anything please know I've never looked at the data from a hellcat or tried to tune one. My only experience is tuning my corvette (1985) after doing a ZZ4 conversion with headers and miniram. Had to put a ecu in it and tune myself due to lack of local help.

With that said. Does the data logs show fuel pressure? If so make sure it's good and stays fairly constant. If it doesn't show it, put a gauge on it to watch it. Reason being is I was chasing some issues to get my WOT AFR right is it kept moving on me. Added a fuel pressure gauge and I found out I was getting some fuel spikes and drops. Turned out my pump was going bad. Could have been a bad regulator but mine was the pump. End of story, without constant/steady fuel your needed trims will always be moving on you as amount of fuel entering into the engine is a relationship between pressure and injector size.

Apologies if the above is already know by you but figured I'd throw it out there to try and help.

 

[rookerrobert]

Frosty you could be right I know you can log fuel pressure and see if it remains constant I done several logs I'll have to check that out. Thanks
The company thats doing the tuning is very good and has very solid reputation he's find what it is I'm certain....but I dont know what pump is in the car really.

 

[Xylander]

I'd have taken it to a shop before I bought it and found all that stuff out first. Then, make the dealer contact the original seller and provide a mod list as a point of contingency on accepting the purchase.

The chances are high that the previous owner got in too far over their head or wallet and just unloaded a car on the dealership to get rid of it. You see this a lot when someone has an expensive part failure or gets the run around from a tuner/peformance shop and the build never gets finished. So they just say, "screw it, put it back together and I'll take it somewhere else." Sometimes that somewhere else is a dealership.

 

[rookerrobert]

yes I should have done that. especially When I seen it had LT's and no cats. I didn't think you a dealship could even sell a car without cats? But thats all water under the bridge now. When the tuner says he's done the best he can I'm going drive it the way I want too. And if and when the engine goes at least then when it goes back together I will know what I have.I got a recall about the cats and o2's and the paper work said the fca would repair the car at no charge. I wish I knew that was true I would have it done as least then I could hear the radio when cruising.