67 twin turbo dart

-
Okay the tci shield is a no go, stupied universal. Would have to modify not only the tunnel but would have to redesign the exhaust on the passenger side as well. Going to exchange and go with a stroud blanket instead already started the exchange with summit. Figure I'd have to modify but man exhaust is such a pain on the floor of a garage to build with no lift. Hopefully get it exchanged here soon and ready for end of month when the season opens here
 
Got the seat back mount done, installed the new seat belts, took her out for a drive today which was nice to get out on a nice day.

20250301_182701.jpg


20250301_182713.jpg
 
Swapped out mufflers. The bullets were just to much especially when you get on it. Swap out to these hooker max flows can already tell a difference even inside the car. Got the new trans blanket it's the RCI one sense it's more narrower. Will get that inside here this next weekend. Had to modify the exhaust a bit to get these to fit since they are wider. Will probably but the bullets on my Ram 6.7L.

20250323_093450.jpg


20250323_093503.jpg
 
RCI trans shield in place was able to just slide it over the trans. Have a track day this Saturday, just paid for the registration for it. Shall see how it does, I know alot more tuning needs done but that's what the track is for, not even going to care about 60' just going down the track and tuning in.
 
Me too, I already figure first one might be bad lol been a while since I ran on a track. Will post up the runs, pending tech, everything should be good to go.
 
Best of luck Matt! Take it easy on the tune, take your time and don’t push it but overall just be safe and have fun!
 
subcom said:
Best of luck Matt! Take it easy on the tune, take your time and don’t push it but overall just be safe and have fun!
Click to expand...
Thanks my friend. Oh I will, will be adding a little race fuel to the mix just for the track. Boost will stay the same at 10psi might drop the afr settings to 11.0. Wish I could have the laptop next to me to use autotune lol
 
Matts440 said:
Thanks my friend. Oh I will, will be adding a little race fuel to the mix just for the track. Boost will stay the same at 10psi might drop the afr settings to 11.0. Wish I could have the laptop next to me to use autotune lol
Click to expand...
They don’t let you do that?
My laptop has to be connected to log. It was sitting open in the passenger seat.
 
Good luck Matt, run it rich, run it retarded, slow at first. Then creep up on the tune from the safe safe. Let us know how it goes!
 
Isn’t your compression around 9:1? I would think you’d need more initial timing than that, but maybe it’s different with that much stroke.
 
Yes compression is 9.08:1 just wanted to keep it conservative till I get it more dialed in and slowly add more as I go
 
30 degrees on boost, at peak torque is a lot. Maybe not at peak hp but down low that’s a bunch.
 
So on 10psi you’re at 10degrees of timing?
 
turbovan said:
Perfect for sorting it out. That’s where I started. Now pulling ~1° per pound of boost after 5psi
Click to expand...
Hmm, that’s far from perfect in my eyes. Your tune sounds more like it.
 
At 9:1 compression I am running 38° max(100kpa) then pulling 1° per pound of boost after 5psi. 10° at 10psi does sound a bit too low, and may cause “phantom” tuning issues. 1.5° per psi may be wiser. Your AFR’s will also read differently once you add the timing back in so don’t waste too much time tuning.

FYI I don’t know nearly enough to ever trust myself tuning somebody else’s car so these are just uneducated opinions
 
Matts440 said:
I can adjust the boost timing and just remove 1*, but keep the 2* till 5 psi then just do the one?
Click to expand...

Matt, you really need to know what timing the combo (cylinder head, piston, plug location, compression, etc) wants NA before you start to build a map for boost. For example, my 489 BBC twin turbo wanted 41 degrees NA on pump gas. So on 10 psi I run it at 30 degrees. But on a turbo LS or gen3 that’s much more efficient, they want 28-29 degrees NA so running them at 19-20 degrees on boost isn’t unreasonable. Make sense? It’s very hard to throw out some arbitrary numbers that are “right” or “wrong” because it’s very combo dependent. Knowing where the engine makes best power NA really helps to determine a starting point for boost timing. It will definitely want less at peak torque and more at peak HP.
 
TT5.9mag said:
Matt, you really need to know what timing the combo (cylinder head, piston, plug location, compression, etc) wants NA before you start to build a map for boost. For example, my 489 BBC twin turbo wanted 41 degrees NA on pump gas. So on 10 psi I run it at 30 degrees. But on a turbo LS or gen3 that’s much more efficient, they want 28-29 degrees NA so running them at 19-20 degrees on boost isn’t unreasonable. Make sense? It’s very hard to throw out some arbitrary numbers that are “right” or “wrong” because it’s very combo dependent. Knowing where the engine makes best power NA really helps to determine a starting point for boost timing. It will definitely want less at peak torque and more at peak HP.
Click to expand...
thank you for that, I know I'm leaving alot on the table being so conservative on the timing, and I know this is where I struggle with the whole tuning process. I'll put more timing in and see where that puts me.
 
Matts440 said:
thank you for that, I know I'm leaving alot on the table being so conservative on the timing, and I know this is where I struggle with the whole tuning process. I'll put more timing in and see where that puts me.
Click to expand...
Timing numbers as low as you have, can have detrimental effects of their own. Ring lands and pistons take a beating because of the heat generated with retarded timing and that heat gets put into the cylinder walls. On race car stuff I see very low timing during spool, on a two step, specifically to get heat in to the turbine to make big turbos spin up.
I’m not telling you to go plug in a bunch of big numbers, I’m saying you need to test and figure out what your combo likes.
 
You must log in or register to reply here.
-

Back
Top