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He's the best. If he says something different than me, he's right and I'm wrong.
ummm is there something I should be taking from that? I wouldn’t know who else to use or trust in Phx? I’m never bound by a contract so always willing to entertain other tuners.
ummm is there something I should be taking from that? I wouldn’t know who else to use or trust in Phx? I’m never bound by a contract so always willing to entertain other tuners.
No, I meant it sincerely. NicD really is tremendous. If it were my own car, and I thought one thing vs him thinking something different, I would trust his take over mine. There was no sarcasm.
No, I meant it sincerely. NicD really is tremendous. If it were my own car, and I thought one thing vs him thinking something different, I would trust his take over mine. There was no sarcasm.
Thanks for clearing that up, he has tuned all my customer cars and my personal cars with zero issues and great customer relations.
Gonna look into swapping out that cylinder 2 coil pack and see if that code goes away
You mite have good power thru xyz rpm range, than outta nowhere a miss fire or something in abc rpm range. Sometimes its like that. Id wanna see more than just an idle log. Its makn power, just not enough!
Swap it to a different cylinder first n see if problem follows
gonna sound crazy but it’s not easy to move coils around on the truck, they are tucked up under the dash and a PITA to get in and out. So I may just throw a known good one at it first.
gonna sound crazy but it’s not easy to move coils around on the truck, they are tucked up under the dash and a PITA to get in and out. So I may just throw a known good one at it first.
I assume that P0352 is cylinder 2 issues
lol, figures...Any more info or pics on the build? Looks like its got some really trick fabwork hiding in there!
Traced the plug wire #2 cylinder back into the cab and to the coil pack. That particular coil pack is the one a tapped into for speedo signal wire for my signal wire, pretty sure it was a red wire or may have been pink. So disconnected the tap into the coil pack harness, reseated the coil harness plug, reseated the plug wire.
Fired the truck and scanned it, no codes detected now. So the P0352 is gone! Really no way to tell if that was actually causing a dead cylinder, highly doubt it. I also took a pic of my STFT at idle after initially firing the engine, they had a big spread between banks. After stabbing the throttle a few times after the coil fix they are now much happier.
Raining like crazy here with the monsoon so hoping tomorrow I can take it for a rip and test the seat of the pants meter. Having the signal wire on that coil pack was making the ECM unhappy and throwing that code, however I’m not sold that it was preventing spark at the plug. This was after a few stabs and pulling the tach signal wire off of the coil harness, much happier STFT between the banks Here you can see the massive split on the STFT
My take on it is the fuel trims changing tells you something is better. It's hard to tell at idle. ON these bigger cammed engines you can be down a hole at idle and never know it. Then at high rpm they balance out so you still don't know. The power curve itself doesn't look bad, just peaking low, which to me is telling you the cam is too small or else it wants more LSA if you keep the duration the same. I think the cam you are looking at will dramatically change that. I do think your torque output looks low, and if that cylinder was truly not firing, I think you'll get a nice little gift on re-dyno day. Even if you don't change the cam.
After snooping around on Mast website I have noticed that $4700 will get me what I want with no waiting.
Mast BL 305 heads fully assembled
Cam grind to my spec
pushrods
so if I talk to them and have them milled to get me the 12:1 and cam in the 250’s/260’s things will be cooking.
seems extreme I’m sure but Mast heads we have always had good luck with, proven components. With the use of nitrous in the future maybe moving to the better heads is smart for growth?
talking to NicD he’s thinking with how heavy my drivetrain setup is that 505hp is not out of line for power. Well really debating spending easy $5k on Mast products or send my LSX 6 bolts heads to Richard at WCCH
Im partial to mast heads myself, but if it was me, id send the heads you already have out and change the camshaft if your heart desires...Is it a number your lookin for in HP? Or it just doesnt feel fast enough right now? I never thought id say this, but 500rwhp on the street is handful. Especially in a show quality truck with airbags and such. I chased the rabbit down a deep azz hole recently with a full RHS 427ci Mast BL LS7 head build in my 65' Nova. Its a Pro touring build and seriously detuned at the moment as we were having some issues. And even at 400rwhp right now, its a handful. Just smokes the tires everywhere. We still gotta turn it up no less. Lets just say, I force fed a ninja bike some rubber last night!
P.S. That is a beautiful build and you do some really nice work!
Im partial to mast heads myself, but if it was me, id send the heads you already have out and change the camshaft if your heart desires...Is it a number your lookin for in HP? Or it just doesnt feel fast enough right now? I never thought id say this, but 500rwhp on the street is handful. Especially in a show quality truck with airbags and such. I chased the rabbit down a deep azz hole recently with a full RHS 427ci Mast BL LS7 head build in my 65' Nova. Its a Pro touring build and seriously detuned at the moment as we were having some issues. And even at 400rwhp right now, its a handful. Just smokes the tires everywhere. We still gotta turn it up no less. Lets just say, I force fed a ninja bike some rubber last night!
P.S. That is a beautiful build and you do some really nice work!
Thank you for the kind words, this 58 GMC is my personal truck and I push it to the limits at times for sure. Street driving a $100k + truck should be fun and spirited if you want it to be. After owning a 800HP CTS-V everything feels slow. I just feel another 80 HP would feel good and appropriate prior to adding the 150 spray. I'm just looking to ensure when I remove the heads and cam and make the choice to do X,Y or Z that its a move that wont want me wishing I did more.
talking to NicD he’s thinking with how heavy my drivetrain setup is that 505hp is not out of line for power. Well really debating spending easy $5k on Mast products or send my LSX 6 bolts heads to Richard at WCCH
I agree here. Figure 100hp drivetrain loss, maybe a few more with the wheel/tire combo, and your only about 20 away from advertised, and as Darth points out, that’s just the air out there. It’s right about where I’d expect it to be honestly. Of course you’d want more, we all do. I feel like sending the heads out for work and a good camshaft spec, and your where you want to be.
What clutch setup are you running currently in the truck?
08-20-2020, 12:42 PM
