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What should be good spot in general to set my points been playing with map and all my craps all over the place..stock cam stock stall th350 4.10 gear 89 s10 35 squirters 74/79 jets.pix if anyone can give me more of a stock example. All I'm seeing are cammed motors or boosted stuff here
The truck live at 6000' Elevation and would like if you guys can give me a starting point on my timing . We have tune the carb the best we can but still rich at idle .
The build 2000 5.3 with 80000 miles on it .
Quick Fuel HR-680-VS
Edelbrock Intake #71187 Performer RPM LS1 Duel Plane Manifold
MSD Ignition Controller#6010
As Cast PRC Stage 2.5 5.3L CNC Ported Heads Milled .017
GM 5.3L Multi-Layer Steel Head Gasket #28-12589226
MR45676 1 ¾” ceramic coated long tube headers 3" collectors
GM Gen III Cylinder Head Bolt Kit #28-12498545
GM ls2 Timing Chain # 12586482
Comp Cam ***** Thumpr 283THR7 High Performance Street/Strip
Melling 10296 Oil Pump
Moroso GM LS Valley Plate
GM LH8 Pan Kit #19212593
3" duels to stock location (behind rear tires) Flowmaster with H pipe
Built 700R4 with a 12 bolt posi rear with 3.73 gear .
I took my car out again and it ran another best time of 7.05 @96mph. BUT it hits 6,500 rpm and quits pulling after that. Its a lq9 6.0 with a cam and brian tooley valvesprings and pushrods. Everything else is stock. I currently have a 750 holley on it running a mix of 91 and 112 octane. My timing is set at 33 degrees from 2500 on. The guy who spec'd my cam for me said not to go over 33 degrees BUT when I first ran it at 31 degrees it would hit 6,000 and quit pulling, now that I bumped it up to 33 its a little better. Should I keep bumping it up and see what happens?? What's too many rpm's for these motors??
definitely try more timing. also, i don't think you need the race gas. sometimes that hurts more than helps. i have a good bit more compression and timing than you and i run straight 93
I know this is old but what engine combo are you running? just looking at different timing combos, I don't have any access to a dyno so just going in other peoples info!
Originally Posted by xpndbl3
put it all in at 2000 rpm and you need more timing than 29 degrees, i made best mph at 34 degrees, some guys run up to 36 on their combos.
hello guys its been a while but the engine swap is just about done. There wont be much time for a proper tune so i wanted to know what would be a good starting point for the initial set up on the MSD?
Here is the set up i'm running
LQ9 tore down and rebuilt
Holley Terminator TBI EFI
243 heads with a very light port
EPS Cam 226/230 111 +2
PAC 1904 Dual Springs
2600 12" converter
I'm set to transfer out to cali next month so i'll only have access to 91 octane gas.
hello guys its been a while but the engine swap is just about done. There wont be much time for a proper tune so i wanted to know what would be a good starting point for the initial set up on the MSD?
Here is the set up i'm running
LQ9 tore down and rebuilt
Holley Terminator TBI EFI
243 heads with a very light port
EPS Cam 226/230 111 +2
PAC 1904 Dual Springs
2600 12" converter
I'm set to transfer out to cali next month so i'll only have access to 91 octane gas.
I wouldnt go higher than 30° total at wide open throttle.
Got my LQ4 set for 28° at wide open throttle. MAP sensor adds 10° at idle and cruise only. I used to dabble with 32-36 but I saw the best gains when I dropped it to 28°.
Add the coil harnesses and wire the crank and cam sensors the change the tune. MSD is marginal at best. None of the pills are a good starting point IMO
guys this model of the terminator efi wont control the LS coils. I have part number 550-406 the one that you guys are referring to is 550-410. Later on i can get the harness and the hand held controller and do that.
yea i'm kinda pissed right now cause when i purchased my current efi system back in feb(before heading out on a 6 month deployment) the one that controls the timing wasnt out yet. It looks like holley released this "LS TBI EFI" system back in june
whats been done has been done i'll be upgrading the harness in the near futur in the mean time back to this MSD tuning
This is all good reading. Still banging my head against the keyboard tho on this tuning for a turbo setup.
I think my problem is I may have too big of carb. Seems to run rich. 850 demon blow through on a stock 5.3 with a 69mm Turbo
What do you guys think? Was planning on getting a bigger cam in the near future with some head work done. Thats why i went with the 850.
Here is my current graph set up. the 5.3 seems to run a little rich still.
11-19-2014, 12:45 PM
stock 5.3 650 dp base timing 
