Adding Launch Control to my Turbo 8.1 Silverado: Slingshot Engaged!

[@champspec]

One thing i’ve done with success with larger cubic inch turbo setups is to run a large diameter downpipe straight into a boost activated cutout… then use a Y that splits into a smaller diameter pipe and some smaller mufflers in series. I have a 4” downpipe into a 4” cutout that splits off to a 3” with two straight through 3” mufflers. This sounds very close to a stock truck at idle and you can still make tons of power WOT.

[@AndyR1982]

LT, you should use the dash switch as a circuit interrupter switch. Use the power from the brake light switch to power the 2 step but the dash switch opens the circuit when in the off position. That way you can load the turbo with the brakes, brake light powers the 2 step and you have 2 ways of buolding boost. Let off the brake to start race, depower 2 step at the same time of releasing brakes and off you go. After you are rolling reach down and shut off switch. This is how i used to control my 2 step.

[@lukesizemore1170]

Talk to Brent from PFI speed, he does some crazy stuff with 2 step settings. Really am enjoying the content on ugly truck, I like your style!

[@LawrenceTolman]

Thanks for the tip!

[@yafilthyanimal1746]

Brent from PFI is awesome!

[@steveww07]

Two step creates misfires. Misfires show lean on the wideband. Raw fuel isnt read by a wideband, only burnt fuel.

[@teaguegearhart9851]

Flip the switch!!! So cool. Love it. Keeping them coming LT.

[@subshooting8414]

Really enjoy this project. Look forward to the motor upgrades that will happen in the future.

[@LawrenceTolman]

You and me both!

[@samleisch1388]

I had a turbo 5.3 with 4 in exhaust. 4 inch dynomax muffler, 5 in by 12 in long tip, and had a side exit in front of rear tire just like your delete pipe, it sounded great. My turbo was an on3 70mm t4 turbo though.

[@tangerine5781]

Dieselpump UK quick spool valve. No more playing games with that puppy installed!

[@jessashley2708]

Love this whole build. Watched start to finish. Have a 2000 5.3 4l60E 2wd with 5" lift and 35" tires. About to do a cam swap and tuning. Already done cold air, shorty headers, cat delete, high flow muffler, coil swap. Keep up the great videos...

[@LawrenceTolman]

Thanks a ton, and it sounds like a fun build you have!

[@GMONEYFIFTYFOUR]

Keep improving ugly truck! Love it

[@LawrenceTolman]

just a little bit at a time!

[@mikeclement7780]

Here's an idea to keep the tail pipe when testing different mufflers. Take the longest muffler and extend all the others to match. Use v-bands to make quick replacement.

[@OG.CLICHE.]

I have a 8.1 with an Allison you have definitely opened up some ideas for my truck thanks!! Wondering if ur ever gonna do a full build on the motor?

[@TheBeerBox80]

This is such a cool sleeper. Probably still gets better gas mileage than my 4.3 S-10 Blazer

[@james10739]

I don't know maybe it's probably close

[@sethl6626]

If you’re still hunting for a muffler, I would recommend any of the mufflers offered by Black Widow Exhausts (I’m not sponsored by them I just like their products). Had a Widowmaker 10 put on my 5.3 Silverado and I love it. Doesn’t drone, fairly quiet down low, and screams when you put your foot in it

[@LawrenceTolman]

I like black widow stuff, but don’t think they make 4” in/out

[@sethl6626]

@@LawrenceTolman now that I think about it, the biggest they make is 3.5” unfortunately

[@richiesixsix]

Burnout in a school zone. I love it

[@FixItStupid]

Oh Thats IT School What A Show Our Park Lot Was Show THE HP Oh donuts around the light pole .. It's bragging rights on Monday

[@dalehall2993]

But after school hours...🤟🏼

[@MrAlexiasjones]

A good torque converter will fix all that too.

[@LawrenceTolman]

Very true, that’s on my to do list

[@FixItStupid]

Right

[@billyray4716]

And make it HORRIBLE driving around under 80% throttle

[@lb9gta307]

@@billyray4716 not if you get one with a good lock up clutch

[@Pinestreetperformance]

@@billyray4716 totally wrong. I run a th350, non lock up 3500 stall custom converter built for my setup (cam/spring gen 4 5.3L, turbocharged, 3:73 gears on 28” tire, 86 c10, 4K lbs) I absolutely love the way it drives, cruises on light throttle absolutely mint and flashes immediately to 3500 and blows the tires off, if you find a converter company worth a crap, it will work great for what you are trying to do.

[@2000S10V6]

I love this build! Thanks for the upload so I have something to watch on my lunch break at work.

[@LawrenceTolman]

sure thing, thanks for watching!

[@northernstreettrucknerd2483]

Love this build dude!

[@LawrenceTolman]

Thanks a ton!

[@yourfriendfarming758]

Looks fun 🤩, always a great job 👏. Keep on keeping on. 🏎🏎🏎👏

[@tskraj3190]

I still think it's impressive how you were able to fit a big block with a turbo underneath an older 1500's hood. I just bought sn 08' 1500 and the differences in hood space are like night and day.

[@LawrenceTolman]

It was a pretty big challenge to make it all fit AND have the inner fenders still in place, but I'm glad I was able to package it all in there!

[@gregquante8864]

Thanks as always for posting

[@LawrenceTolman]

You bet

[@petersimpson1734]

Hey LT, love the channel...... for us old analog dummies how about a quick one or two minute description of what exactly the two step does.

[@petersimpson1734]

I meant to say how exactly is the two step building boost sooner, what is it doing to build the boost sooner?

[@LawrenceTolman]

it lets you open the throttle all the way so more airflow passes through the engine to spool the turbos, but also cuts ignition timing which allows unburnt fuel to enter the exhaust where it can ignite, and help the turbo spool

[@brianbird3756]

In an extremely simplified description, it causes backfires in the exhaust and those backfires cause higher pressure to spool turbo.

[@gapnationgarage71]

In my truck I did both the 2 Step and the IAT sensor, the 2 step is launch control and IAT sensor is more of an anti lag set up! I’ll have to make a video of it! It’s sweet!!🔥🔥🔥

[@LawrenceTolman]

what table do you use to pull timing with the IAT trick?

[@gapnationgarage71]

@@LawrenceTolman I’m going to post a video on it tonight!👍🏼🔥🔥

[@gapnationgarage71]

@@LawrenceTolman I just got that video posted hopefully it helps! Keep up the awesome videos!!🔥🔥👍🏼

[@Black_noir_mw3]

Love it as always

[@Sneakdisscommentbelow]

If there was a turbo grind camshaft in that truck it would probably build boost considerably quicker. That stock cam is probably a small duration and not moving much air to the turbo. Also depends on how much air mass that is on the cold side like size of intercooler and how much piping is in between the turbo outlet and throttle body. If your using 4" charge tube then downsizing to 3" would also cut down turbo lag.

[@LawrenceTolman]

A cam would for sure help...

[@Sebastianbartledoo]

I’ve got an 01’ extended cab full weight a/c with a full manual reverse pattern th400 with a transbrake. Also column shifting for the stealthb

[@Pinestreetperformance]

Hood/fender exit like a man.😂🤌🏻

[@boostwillis3906]

I know alot of guys do a advanced table for boost builder on the chip. I believe they pull timing to get it to spool.

[@Sebastianbartledoo]

Also pull 10° of timing out at the 2 step rpm for massive fireballs and spoolage

[@rileyfinley-parker2471]

13:13 that view out the back glass holy shit

[@LawrenceTolman]

it is pretty on that side of the lake

[@kevinjohnson9372]

Didn't catch what your Stall speed was but u need to set that up for a spicy boost launch. That thing is an animal

[@LawrenceTolman]

It’s rated at 2,200 to 2,400 I believe, it’s a TranStar 88H

[@janetdanner9585]

Ugly truck has a hard life

[@ValarAmstaffs]

Very cool!!

[@LawrenceTolman]

thanks!

[@nastynotch8314]

Come on LT, do something no one is doing anymore, H pipe it. I love that chop!!!!

[@Pinestreetperformance]

H pipe on a 4” single exhaust off of a turbo ? 🤔🤔🤔

[@davidcunningham00]

Looking good.

[@patrickmoran8790]

I think the dash shaking is from torque converter lockup clutch shudder. I will also tell you that I’ve never been witness to a street truck to rattle the tires because of traction causes.

[@LawrenceTolman]

there is no converter lockup taking place since I've disabled it in the tow/haul portion of the tune I use while on the 2-step. The dash rattle is just because of the 2-step and the vibration... also no traction issues here, it just hooks up and goes

[@patrickmoran8790]

@@LawrenceTolman Keep having fun. I’m enjoying the progress.

[@TeamTopKick]

Truck sounds great.

[@LawrenceTolman]

I think so too!

[@skuz34]

flo-pro is a surprisingly good sounding muffler for not being the most well known brand, i had on one my 91 with a 5.7 and it had good rumble but still loud enough to set off the occasional car alarm, maybe check them out

[@maineturbodiesel780]

Your neighbors must either hate you or love you not sure if there would be any in-between . . . Personally Im hoping someone like you buys the house next to me!

[@LawrenceTolman]

yeahhhhh... generally I try and be conscious of noise and stuff, and so far nobody has complained (yet) lol. luckily there are a few other loud cars in the neighborhood so I'm not the only one

[@maineturbodiesel780]

@@LawrenceTolman have you by chance head a spintech muffler on a big block? Sounds absolutely amazing check it out a few videos on KZbin with them

[@colinallan2976]

I am very firmilar with the S400 series turbos as I run them on heavy Series 60 diesel engines. If you want faster spool up, change the turbine housing to a smaller a/r. The S400 series with the 96mm turbine wheel had four options of size in the T6 flange...1.10, 1.25, 1.32, 1.45 a/r I think they runaround $220.00

[@LawrenceTolman]

I for sure could do that, but my thought was just to keep it as is until I get my larger motor in place and the boost turned up and see how it reacts

[@bryandevries7210]

Congrats on breaking 50k subscribers!

[@LawrenceTolman]

Thank you!!

[@brucenaylor2043]

Very cool 😎

[@davids7349]

Killer truck!

[@jberkhimer]

Ever get the fog lights wired in? I was able to add the switch and lights. The harness was all ready on my truck so it was the switch, lights, and a fuse, and it worked!

[@LawrenceTolman]

I've never messed with it actually, other than putting the lights in the valance. I looked around and didnt see any harness there already, and I heard on the 99-02 trucks you need to program the BCM to get em to activate

[@jberkhimer]

@@LawrenceTolman Sometimes the reprogram is necessary, other times it isn't. It's really hit or miss, should be able to install the switch (dash harness is prewired) and test with a test light at the relay point under the hood to see if the signal is coming through or not for activation. Can also add an additional ground to the low beam headlight harnesses which will allow the low beams to stay on with the high beams. Simple to do with a wire tap and the fender braces on the corners.

[@robwalters9695]

A t4 probably would have been a much better choice. With a 1.1 housing it still would have supported the HP goal but drivability would be a lot better

[@ze_german2921]

I would love the Corsa but from what I had discovered they are extremely expensive. Myself, I am building a dual 2.5" exhaust for my 6.0 LS and will try Knock Off Magnaflow

[@LawrenceTolman]

yeah, you aint kidding. a 4" corsa is like $400

[@erik120719]

I've been using knock off flowmaster 10s from eBay on last few build . They r like $18 a pop and sound really good. Had to put two in a row on my wife's Yukon but it sounds mean asf and doesn't drone at all. Just got 2 more to use on my lq4,243 head, sloppy stage 2 6.0l I'm putting in my 09 Silverado. Probably gonna be too loud but need something till I can figure out the exhaust fully. I got a diy 3" kit and long tubes , going with dual 3" with h pipe.

[@erik120719]

There is a video of my wife's Yukon on my channel, from stock exhaust minus muffler to headers to single muffler to both mufflers.

[@s.gossett5966]

Have you looked into Black Widow exhausts yet? A few of the cars featured over on AutotopiaLA's channel are running them could be something new and interesting to check out. And hope to catch Ugly Truck over in Salt Lake County someday.

[@piercesgmc9112]

I think most of those are non insulated and would be very loud, I could be wrong I don't have any 1st hand experience but might be too much

[@s.gossett5966]

@@piercesgmc9112 perhaps. To be honest I've only heard them on KZbin so I wouldn't want to vouch on the quality of the tone.

[@shadowopsairman1583]

If you were drilling unsecured with that big bit on Power Nation, Osha would of had you.

[@FixItStupid]

Big $$ Fine Too LOL

[@thebigv8644]

Flowmaster Super 10!!!!!

[@LawrenceTolman]

those do have an agressive sound... I like em

[@Pinestreetperformance]

A better camshaft and converter to fit your setup will absolutely change the way that truck performs. Is a 8.1 comparable to a gen 4 LS bottom end speaking in strength terms ? I always wonder why more people don’t mess with them. Obviously there 3X the price of a junkyard LS engine I’d imagine

[@LawrenceTolman]

The rumor mill says not even close in terms of strength… but yeah a good cam and converter will do wonders

[@dalehall2993]

😎👊🏻

[@shtboxyj8406]

You could also try the sloppy mechanics 3rd gear switch. I can make full boost on footbrake.

[@LawrenceTolman]

how bad is the delay when you let off the button? I heard its nearly a full second before you start to move after releasing the button

[@shtboxyj8406]

@@LawrenceTolman yes big delay. But if you time it right it's awesome. Mine is typical sloppy. 6.0l ss2 gt45 4l80e. But with my 3400 converter I can foot brake to 4500rpm and will actually start to spin if I stay on it. Only 7-8psi gate.

[@frecklxs]

He looks familiar. Isn’t he on one of the shows on Powernation??

[@LawrenceTolman]

I think he was

[@bobglick4673]

which model 2 step are you using ? i did a quick search and couldnt find one like that

[@Mac-kb2yf]

Cool stuff it would be cool to catch you on the street with that truck so we can run them I see you once in a while running around town I have a first gen Firebird with a 5.3 Ls with a 65mm Garrett, lights super quick on the street it’s hard to beat 🇺🇸

[@LawrenceTolman]

hell yeah, I'd be up for a run one day... although I don't like the sound of hard to beat lol

[@Mac-kb2yf]

Does your truck have a 4l60 or 4l80? I have a 60 in mine with a 3200 stall I think it’s a Tci, it was pretty damn expensive, it seems to work great not too loose for daily driving and it locks up in overdrive so fuel mileage isn’t horrible

[@OG.CLICHE.]

Where did u get the 2 step from?

[@ethancooper1127]

Stroker 8.1😏 ?

[@patrickconnolly349]

Are you running a stall converter and if so what?

[@Korruptionen]

Ever consider a turbine muffler?

[@ryanconway6915]

I put the switch for my LP9s in that same spot in my 8.1 Yukon. Looks factory.

[@garlandjones7709]

I'm curious...what gear is in this truck? And what turbo? That thing should be melting tires below 70

[@LawrenceTolman]

It’s a 3.42 with a truetrac, and an S480 (80mm) so it is a little lazy to spool from a dig… also only makes 480hp 620tq at the setting here.

[@garlandjones7709]

@@LawrenceTolman s480 is big lol. I'd still think it would be a tire shredder. Guess it's just the combo of that, the 3.42s and the 4l80. So....what's your next move? Forgive me if you've said already.

[@Trashencash]

Not looking so ugly anymore and I'm not talking about the truck😉

[@yafilthyanimal1746]

Downsize the exhaust housing on the turbo to a smaller A/R

[@LawrenceTolman]

yup, that would help for sure.

[@yafilthyanimal1746]

@@LawrenceTolman then when you get the motor built you'll be able to switch back

[@yafilthyanimal1746]

@@LawrenceTolman I've been watching you since truck tech and was watching powerblock since I was 7-8 years old. Stinks things aren't the way they use to be.

[@billyray4716]

You said it sounded awful without a muffler? You sure you havent devoloped low t or something that was the perfect sound

[@Stickylsx]

A good stall should help big time

[@LawrenceTolman]

yup, it will for sure. its on my list

[@BurkesRepair]

Not sure ugly truck is so fitting anymore...time for a new name?

[@ManuelRodriguez-zj5zv]

What shocks would you recommend for a truck just like yours stock height

[@TetraHydroCannabinolTHC]

Blistan shocks

[@LawrenceTolman]

yup, I do like Bilsteins

[@ManuelRodriguez-zj5zv]

Lawrence LT Tolman ok thanks

[@johnboticki9154]

That exhaust did sound sweet during the burnout. But other then that was trash

[@LawrenceTolman]

agreed

[@netzatony]

Try a chambered magnaflow.

[@joshbrake84]

Truck could use a floor shifter

[@tglidn95]

Just sayin.... Before u take the leap for a bunch of different mufflers, black widow. Im not paid or sponsored. I do have an 8.1 with race venom, only problem is price of gas, cant keep my foot out of the fun make it happener

[@LawrenceTolman]

I love black widow, but they don't make a 4" in/out

[@dustinprentice6207]

What size tire are you running on those 18’s?

[@LawrenceTolman]

265/60/18 Toyo ST3

[@cameronf2758]

Put the strait pipe back on.

[@ajthecreator4249]

I always used the 2step/launch control for dig racing and a trans brake for roll but if it works it works I guess

[@LawrenceTolman]

A trans brake active from a roll? I've never heard of that before.

[@sb0mb]

8.1 and 4 inch is never quiet... from my experience

[@adamchiaramonte7883]

You need a 4k stall

[@LawrenceTolman]

that might be a bit much, but I definitely need a little looser converter

[@myrondesjarlait9752]

Not saying you're wrong but why 1 big turbo instead of 2 small ones?

[@TeamTopKick]

Because the tiny turbos would build boost too quickly and cause a huge pressure spike and blow the motor.

[@LawrenceTolman]

I think each system has its place and pros and cons. For me, a big single was simpler fabricate and to install, and it fit the engine bay better. I’d have to move a lot of stuff to run twins with the big block, the drivers side is way tight

[@sabero5668]

@@TeamTopKick 1000hp worth of turbo is 1000hp worth of turbo, whether its a single or twin setup the difference in spool time is going to be negligible.

[@mauricecooper176]

What gears does that rear end have

[@griffinmead934]

He is running 3.73 currently if you go back a couple videos you will see he went back to stock. He had 4.30 in previously but those were intended for the old 5.3 that was in it

[@LawrenceTolman]

3.42's now, had 4.30 before but I changed back

[@mauricecooper176]

@@LawrenceTolman Seems like it still pulls pretty quick through the gear Maybe a 3.08 But who knows how much that would hurt the bottom end But you do have all kinds of torque

[@shadowopsairman1583]

That turbo isnt too big for a big block. You can add a super charger or a smaller turbo to spool the bigger

[@TeamTopKick]

Once he builds the motor and if he goes stroker in it the turbo will be perfectly sized. Compound turbo setup when its built would be awesome.

[@crsmith56]

LT, you need to get a cameraman! Aka, wife! Give us some new angles!

[@Sabessuspensionz]

Dayum I’m early af

[@xozindustries7451]

It seems the only way to make that truck useful is to go AWD

[@LawrenceTolman]

it would be cool so have this engine in an AWD truck

[@FirstLast-we8cb]

Unfortunately I'm not a tuner but rather a tuber so could only help with yer potato needs.

[@BryanBeast13]

Take it to precision transmissions

[@bryandevries7210]

Love their channel!

[@kevenhiemie]

How about robbing an idea from the diesel world? I personally like the FTE resonator but here's a gentleman that built one himself it maybe a good idea for you. Homemade resonator m.kzbin.info/www/bejne/n4KnaJasm8uYoNE

[@apethings7671]

Horrible name for this truck. Should be dude magnate. Cuz I can't resist clicking vdo

[@Smokermouse]

DID i see school on the street? Pick your spots before you record. This has been a public service.