[ZO6Ted]

Correction: I'm L87 not LT1. I come here because I get the best advice on the web. I have searched. I've owned 7 Camaros and lookin at ZL1's or C7 ZO6's. My 2020 Silverado is 6.2/10.w Lingenfelter 2650, upgraded valvetrain stock cam, 3" true duals, going from 105mm to 91+ (3.6) pulley so should be 9.5-10.5 lbs. Snow single nozzle 100% meth, Had LT4 inj. in a box, just ordered LT4 HPFP 12711668 and 12677005 lines. Do I need any other parts? If so PLEASE provide part #'s Also I can do E85 it's very local. Sam at Amp is my tuner. She's a fat girl at 5900 with me so 1.5 Camaro weight but will cut 1.6 60's or better on the street with 4wd. Btw Sam's dyno showed almost 24% loss but it does have 83k on it. 495 vs 650 claimed but you know how vendors quote the perfect scenario. Thanks brothers much appreciated as usual. Still working on the 1200whp turbo 4wd btw.

[ZO6Ted]

Update. So what should be the approximate E mix for this? Probably about 10 lbs., LT4 fueling, stock fuel lobe, single nozzle snow meth kit. E40,50,60? Tune and dyno tomorrow.

[Joshinator99]

Originally Posted by ZO6Ted

Update. So what should be the approximate E mix for this? Probably about 10 lbs., LT4 fueling, stock fuel lobe, single nozzle snow meth kit. E40,50,60? Tune and dyno tomorrow.

Just start low, like E30 on a half tank of fuel or less. That way if all looks good you have room in the tank to dump some more E in.

[ZO6Ted]

Thank you as usual for the great advice I'm really excited! I'll report back the results on Sam's dyno. I'm guessing I'll need an update or two but at least we're getting started in the morning. Check the ECM over there yesterday for a startup tune. I'll also have before and after dragy results shortly. The torque management was absolutely killing it with the Lingenfelter tune. If the trans tears up I have amps trans guy to do it.

[ZO6Ted]

Hate to bother with my litle pissy problem with so many fast guys on here. My truck won't run. Sam says fuel goes to zip when you open the throttle. I did Lt4 inj and pump no lash cap (correct right?) replaced all 3 lines. Any ideas? Ran great before.

[Joshinator99]

Originally Posted by ZO6Ted

Hate to bother with my litle pissy problem with so many fast guys on here. My truck won't run. Sam says fuel goes to zip when you open the throttle. I did Lt4 inj and pump no lash cap (correct right?) replaced all 3 lines. Any ideas? Ran great before.

You have to check the pump travel on the fuel lobe, can’t just bolt it on. I’m assuming all the tune parameters got changed for the LT4 pump too? The HPFP could be bad…not common but does happen especially if it wasn’t setup right.

[ZO6Ted]

I appreciate that so much just sent this to my mechanic buddy. Ty my friend!!!

[Joshinator99]

Originally Posted by ZO6Ted

I appreciate that so much just sent this to my mechanic buddy. Ty my friend!!!

No worries, hope it helps. I’d ping @Megahurtz as he’s probably seen this before…

[ZO6Ted]

Thank you brother just saw this

[ZO6Ted]

Going back in a bit today to see Sam at AMP for the tune hopefully. So the Lt4 hpfp apparently isn't a drop in on a 2020 truck. My installer found a thread on Corvette forum that explained that on 19+ some LT4 hpfp's needed the different ohm reg from the LT1 pump transplanted to effectively communicate. So we've done that. The DSX E85 setup I ordered apparently isn't the correct one either so pause that. I bought twin 450 Aeromotive drop in pumps (yeah right) yet to be installed. So at this point I just want my daily back and running. Temporarily doing 100% meth via Snow, 3.6 upper and 93. I'll update if this Frankenstein pump works otherwise probably just doing Goliath and +30's. At this point I'm missing the good old days before electronic everything. You could do it all in your backyard and running 11's was bad to the bone . Oh well...

[ZO6Ted]

So ran out of low side. ~ 30psi so no improvement. Driving impressions though part throttle spins all 4's out of the hole. Saw ~9 lbs. on the dyno. Sam said do the twin in tank 450's (one might work at this level) and E85 DSX kit and come back in a few days. A step at a time... The takeaway for y'all with trucks (who doesn't have a truck and a Camaro lol) the LT4 hpfp mated with the LT1 regulator off the old pump did the trick for my 2020!!! Raptor R and TRX is toast soon!

[ZO6Ted]

So the DSX kit won't work with an E90. My installer thinks he can make it work if he re pins the wiring. Maybe Ted Jannetty Or King would know? Anyone? Need E it's literally 3 miles away.

[Mark114]

Originally Posted by ZO6Ted

So the DSX kit won't work with an E90. My installer thinks he can make it work if he re pins the wiring. Maybe Ted Jannetty Or King would know? Anyone? Need E it's literally 3 miles away.

DSX has excellent customer support. I suggest that you contact them directly.

[ZO6Ted]

Thank you my guy is trying to talk to tech support today as well. Here's hoping!