I saw 1.3g cylinder airmass on your log and said how tf is that car making 975rw then you mentioned chopping numbers out of the maf for the port injection. Ive never tuned anything with that port injection system but i did just tune a car with dsx atlas port injection. Really good results

This old-school M5 has been given a tune-up by the folks over at SOFTSICE Performance.

I put 2” LT’s with no cats n muff delete, mannnn I live I a quiet town full of Karens, I drove it like that for a few days then put hi flows on. It was crazy loud til I piped it down some w the hi flow cats, even still. Idle n under 3-4 k rpm is cool. When I put my foot on the bell housing, it tends to make some real noise. Everybody always asked me what I got for exhaust on my car. I just tell him two inch long tubes, high full cats and straight pipes and it sounds so good not having to spend all that money on some thousand dollar Cat back system all I did was bought a tailpipe Set! Good to go!!

You can run 10psi if you increase ring gap. But if you’re that far into the motor…just drop in new pistons.

Mine mad 405 cam & longtubes

This video and explanation of how confident you are with too high port injection makes me want to send my car from PA to you but I’ve already had everything else done by a shop in Philadelphia Matt with the stock bottom end what would be your suggestion to limits of running this setup with the stock bottom? My cars top end is built with the magnuson and heads and cam which running 841whp on 93. My car runs fantastic and big part of me wants to keep it that want I just ordered the THPSI lid. I’m considering doing port injection however I I don’t want to blow my engine.

This video and explanation of how confident you are with too high port injection makes me want to send my car from PA to you but I’ve already had everything else done by Complete Street Performance. Matt with the stock bottom end what would be your suggestion to limits of running this setup with the stock bottom? My car top end is built with the magnuson and heads and cam which running 841whp on 93. I just ordered the THPSI lid. I’m considering doing port injection however I I don’t want to blow my engine.

Matt - the only thing I'd like to ask about dynoing intakes with the hood open is, what would the HP results be like out on a road course after 15min of running with the hood closed? Which intake would be better then?

Let me guess ? Speed Inc Hack job? They did this build on my 2020 zl1 1le, first day I picked up my car it showed check engine with 6 codes, oil leak antifreeze leak, and so on. I picked the car in march and in April my brand new lt4 was blowing white smoke 💨, in between that time the car went back 5 times for one issue or another ( I didn’t even get to enjoy the car)Bottom line I did one good pull and catastrophic failure and this my second build on the lt4 platform because I sold my first zl1. Their tow truck driver was telling they were having a lot of problems with cars going back because of either their tuner, their builds, or both and he referred me to a more reputable shop. new shop said their tuner Jim was throwing too much timing at it, half their cheap brass rockers were torqued between 32 and 35lbs, cheap lifters on the market, hoses kinked, catch can wasn’t hooked up properly, rocker screw just sitting in between the springs FOR GOD’S SAKE, and instead of replacing the oil dipstick where it was leaking they glued it and it was still leaking all that time and so on and so on. Glad you got this customer situated

Did this ride need an auxiliary fuel pump depending on mix?

Where you at in IL? I’m near the Chicago suburbs and looking to get some work done in spring?

We'd love to get a quote on the port injection for my zl1 1le

160 thermostat is silly on this build as well as the fast intake which does nothing but cost 1000 bucks

Heh Matt, how do I get a hold of you brother? I need to pick your brain about tuning these LT4s .

Road America is so good...

Speed up the hill out of 14 is insane

That's my car with me driving. It's our MM900R package. Engine : JLT cai, VMP 105mm tb, VMP Apex lid and intercooler, ID1300's billet fuel rails ARH 2" headers Borla Atack 160 degree thermostat My e85 tune Suspension: Full BMR bushings and spherical joints front and rear. Stock CFTP springs and sway bars. Front brakes are swapped out for gt350 calipers and Gyrodisc rotors. Carbotech xp24 front pads Hawk dtc60 rear pads Stock rear rotors 305/30R20 square Hoosier R7

That sucker ain't stock 😊

(SiC) bro! Smooth fast lap. Who was driving? Was that engine modded by Matt or Stock?

Matt - do you work at Nickey or just tune for them or/and other shops? Do you do remote LT4 tunes?

Good work! Stock clutch?

What happened to your channel??? I haven’t seen any zl1 videos lately.

25+ degrees of timing with boost?! What? Is this typical for LSAs?

You have to start doing more lt4 videos.

Do you have to retune if you drop the boost around 12,just wondering.

Barely on the throttle

heading there in 3 weeks great video to study thank you

Where is your location???

So without the boost a pump how much would it make on 91 average?

What happens if you swap out the whole engine and put a full assemble ls3? Does it need a tune?

sounds about right .... i got 477 whp 450 tuorqe on l99 using Titan King Comp cam stalk intake swapped into 6 speed f body

Man I might need you to tune mine. I’m from Texas and the car is pushing I’m sure above 15 lbs of boost as it pegged out the gauge with 2.38 upper and 10% lower. Some tuners have told me that it was fine but I don’t think so. I want it to be safer and have a heat exchanger with e85 and it barely put down 703. Any recommendations ?

Hey Matt are you located at Cali

I wanna add port injection and get rid of the meth

Very glad to see an L99 dyno. I have a similarly modded 2011 2SS and was curious what my numbers might be. Plans for a cam and bigger throttle body in the future. Great video.

There is a huge flaw with this Dyno test concerning a C5. In the real world the hood is closed and that Haltech is sucking in hot air from the engine bay. Breathless, Callaway and Vararam are breathing ambient air. Shut the hood for a few min while the motor is still hot. Less o2 less power. That and the ecu is.going to pull timing.

When you get over 160mph on the back straight you know you have a very powerful car. That 2RS driving like miss daisy 😁

The interior is still cheap and full of cheap plastic

Why is the R-F intake power curve fluctuating up top and dipping down before 6500rpm?

How would that intake compare to the stock box with the hood down and on the road @ 100mph? That would be real world. Dyno tuning is always with the hood up and at mostly lower wind speeds.

Awesome in depth shizzz....

Good work! You sound really knowledgable on this platform....

Did you do the triple pump just because or is it needed w under 1k wheel? Fore numbers said dual pump kit supports 1k wheel on e85. I was hoping to see your low side fuel pressure on the log

Are you in Indiana? Definitely an indiana plate on it.

What did car make completely stock and what did it make after your stage one kit?

Anyone know if the magnum 2650 come with a complete kit for install or is it just the supercharger? I got an Camaro SS LS3 so im curious if it comes with heat exchanger, resovior, injectors, etc.

Awesome tests, you are a wealth of knowledge sir thank you.

Very nice! I might have to do this.. would you get similar results if i left the engine stock and did the boltons ??

If you’re going to do this keep the VVT

Where are the packages prices. Is this shop located in Texas