MK4 Big Turbo Engine Build

Part 2 of the MK4 GLI Big turbo build. In this one we tear the engine down, and rebuild with all the new hardware and CTS turbo kit with Precision 6262 turbo. Tons of upgrades on this and soon ready for the dyno.
Eurodyne Maestro 7 Tuning Suite
comotorsports.ca/eurodyne-mae...
IE Drop in Rods
comotorsports.ca/ie-1-8t-144x...
ARP 10mm Head Studs
comotorsports.ca/arp-head-stu...
Supertech Exhaust Valves
comotorsports.ca/supertech-ex...
Supertech 1.8T Valve Spring/Titanium Retainer Set
comotorsports.ca/supertech-1-...
ARP Crank Sprocket Bolt
comotorsports.ca/arp-crank-da...
CTS 1.8t Turbo Kit (with Precision 6262 .63
comotorsports.ca/cts-turbo-mk...
CTS Front Mount Intercooler Kit
comotorsports.ca/cts-mk4-golf...
1000cc Injectors
comotorsports.ca/bosch-95lb-1...
Deatchwerks in-tank fuel pump
Vibrant Vented Catch Can
comotorsports.ca/universal-ca...
Fluidampr
comotorsports.ca/fluidampr-en...
ClutchMaster FX400
Innovate Boost Controller/AF Gauge
CO Motorsports "Fast Coast" Hoodie
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[@Keepgunnin96]

You guys are kicking it not a lot of people are making videos for 1.8t there a lot people don’t show and you guys can blow up with this great content 👍🏼👍🏼

[@COMotorsports]

Appreciate the feedback.

[@HughJazzDong]

Just subscribed. Love the content! Perfect combo of being detailed without being boring!

[@COMotorsports]

We appreciate it. 🤙

[@nathansamuels3578]

Never clicked like so fast lol Im still collecting parts for my 1.8t big turbo build, so this is great motivation and insight. Keep up the good work, much love from new zealand 🤙🤙

[@COMotorsports]

Appreciate it man, best of luck with your build.

[@evanmorgan1208]

I'm in the process of building one too, man. What type of turbo are you going to run?

[@nathansamuels3578]

@@evanmorgan1208 hey brother. Well nothing fancy since im on an extreme budget lol i was looking at mambateks version of the gtx2860r. They have a 1.8t category on their site. Seems decent for the price

[@cre8tivegarage157]

This build is RAD , thanks for the experience 🥂

[@CynicalVapsta]

Shhhees soo clean cant wait for my fmic for my gli :)

[@franciscomendoza2263]

I had the same problem on my fx400 I had to order a new flywheel from clutch master I’ll be here by the end of the month

[@morrisongarcia2715]

Love the videos 🙌🏻

[@COMotorsports]

Thanks! We appreciate the feedback.

[@anonlincracing2484]

I fookin love this build i can't wait to get this far with my GTI AGU im on a k04 with 360 cc injectors cupra R fuel pump 4bar FPR just got it pushed to the max with my tuner today im yet to pick it up and see what its like 🤗🤗🤗🤗 keep the vids up man well done for the detail 👍

[@COMotorsports]

If you think a K04 is fun on these...you're in for a treat with a real turbo. :). Best of luck with your build and thanks for the comments. 👍

[@beefysghost867]

K04s are fun as hell i love mine right now but the power is addictive you always want more

[@anonlincracing2484]

@@COMotorsports its difficult to get a bigger set up without making it less analogue as mine is an early golf turbo runs vacuum pressure seen a KO4 that has a bigger turbine and compressor wheel so I guess getting 600+cc injectors and meth would be my next move

[@anonlincracing2484]

@@beefysghost867 I get what your saying bro I had mine at stage 1 tune with the k04 set up it felt like 200 whp and i wanted more after a month of hard driving mines an old golf so it has lag from 1 -3 but comes on savage

[@IngeBall]

Great channel ☺

[@COMotorsports]

Thank you! Glad you like.

[@RageeshKanagarajah]

Damn this channel is sick

[@COMotorsports]

Greatly appreciate it.

[@beefysghost867]

Makes me want to get my build done. Precision 5858 turbo, boostline rods, 83mm je pistons, 1000cc injectors, e85, got the dw 285 in tank pump also. just going nuts with it

[@COMotorsports]

Lots of good stuff there.

[@beefysghost867]

@@COMotorsports I got the motor pretty figured out the only thing I'm worried about now is the transmission, because it's a 5-speed what would be a recommendation of of yours I have been looking at dog box kits, but I'm going with either a Peloquin quaife diff. Just trying to figure out what i need to do so tranny don't grenade on me

[@rexknudson11]

So in depth!!$ keeping it going!! I neef help. Awp 03 jetta 1.8t!!

[@COMotorsports]

👍

[@rsdene]

Another great detailed video! 👍🏻 when’s the mk5 awd update coming? Looking forward to it 😎

[@COMotorsports]

We'll have an update of some sort shortly.

[@psavel274]

You used some quality pieces for this thing. The Integrated stuff is top notch. Those were the I.E. coated valves right? What springs were they? Supertech? Definitely a sizable snail too. Those Precision's take a good amount of abuse. I have seen very little failures from them, even when pushed hard repeatedly. Smart man for taking care of the crank gear and switching to the manual tensioner and getting away from the hydraulic one which is a ticking time bomb. Air pump delete FTW. Good move. My guess is the customer will be back for a Quaife or Peloquin. The LSD is a must at this point. Legit stuff right here. Good work and damn nice looking shop.

[@COMotorsports]

I agree with most of what you've said but we've seen way more failures on precision turbo compared to Garret. Not even comparable to be honest.

[@psavel274]

@@COMotorsports Really??? I've only seen a couple to be honest but I've been out of the game for awhile. I agree the the Garrett and Borg Warner are definitely more 'tried and true' with many more years of usage, primarily because they've been in action longer. I built a few 1.8t's with the 30r and 35, and the 30r was probably the best way to go, not just for reliability but the best mix for spool time, and top end power. What's that precision unit go for price wise? I don't even remember what I paid for the gt30r... like I said, it was probably 8+ years ago.

[@755benoit]

What could of cause the rod bearing to have that sort of damage??

[@lewisberry8657]

Really like your videos been going through all of the older ones an watching them. Question I got is a fluidamper needed on my mk6 gti full apr stage 2 ,intercooler, exaust etc. It's got 124,000 (getting chains done) planning on doing apr k04 swap.

[@COMotorsports]

I believe USP did testing to show a bit of power increase with one. To much to explain on here, we do them to hell get rid clutch chatter, easier on the crank, and help when revving higher.

[@lewisberry8657]

@@COMotorsports Kool thanks, I'll probably have 1 put on when the chains are done for peace of mind

[@nospeedlimits7777]

Hello Dave, Clay, all garage bad monsters.. precision 6262 .63 ar in this blue thunder vag. Is it ball bearing T? Is it better spooling than garrett gtx3071 used in your golf? Which is best of two? I mean not only top end dyno numbers but whole behaviour and reliability? Fluidamper in your tuning description. I've gonna see what it is. Quite expensve. Does it really make difference? Is it just engine pace maker safety device? Each one of your vids is a car life art unique portrait.. there's more than what they can see 😮

[@mazpr2025]

These engines including mk6 etc, the crankshaft are almost bullet proof, the cylinder heads are not so great. I have tore them open, cylinder head, piston rings destroyed, but man, the crank is unmolested.

[@luispadilla1675]

Awesome Video. Did you guys get the rifle drilled rods, what bearing and how much power are the stock pistons good for ?

[@COMotorsports]

ACL Race bearings, RD rods... pistons we'll see. :)

[@wayneywayna]

just subscribed to the channel love the content working on my build as we speak and i was wondering if you are running the vvt on this engine ?

[@COMotorsports]

Yes, thanks for following along.

[@VQKYLE410]

Damn who’s lagoon blue is that ??

[@mattrico1633]

Great content. Would you guys know what would be the better turbo between a K04 and a FrankenTurbo F23 as far as a replacement turbo would go. I currently have a K04 on my mk4 jetta and want to make a little more power. Will the K04 hold around 350hp or should I switch over to something different? Thanks!

[@COMotorsports]

Put a bigger turbo on it.

[@JoediyLab]

Hey Dave, I noticed on the last several engine builds you have not hot tanked the block and components. Is this a normal procedure, Do you ever pressure test the oil galleys or magnaflux the block? Or only on race engines? Thanks Joe

[@COMotorsports]

Depends on the condition of the engine, and overall power goals. No need to over complicate things for relatively basics setups. This stuff is expensive, so we try to save clients where we can based on their goals, or what the vehicle is used for.

[@JoediyLab]

Thanks for the quick reply.

[@yoyomaster4545]

Part number on those heater hoses!?? I’m doing a similar setup on my gli those would be pretty handy. Didn’t see a part number in the description

[@COMotorsports]

Will have them added to our site tomorrow.

[@codyhuitt821]

Do you ever have issues with bearing wear or anything when putting new robs in without balancing the rotating mass?

[@COMotorsports]

We always check clearances on new rod bearings. 99% of the time in these builds the crank isn't removed from the block.

[@janmarquez945]

So I got the same cts intercooler kit for my big turbo set up, do i use the same diverter valve from my stock turbo?

[@COMotorsports]

The intercooler has nothing to do with the diverter valve/blow valve setup you run.

[@roybamford8698]

Hi mate at what power would you change the valve guides and would you only charge the exhaust side or get a complete set any advice would be welcome I’m going for around the 450 to 500 mark

[@COMotorsports]

Valves guides, not at all.

[@anhaltjustin]

what would it be for some rods to be installed? i have a garrett 2871R already, and went thru one block already haha.

[@COMotorsports]

Drop us an email with specs, power goals, also if the cars being dropped off, or just short block etc... We can do whatever you like.

[@johnbendelibaan5986]

Did u guys replace the fuel pressure regulator? If yes what bar did u guys use??

[@COMotorsports]

Depends on tune, and fuel requirements. We usually use stock FPR unless we need a bit more fuel out of the injectors then we can quickly swap to a larger FPR. But we generally plan the fueling out based on the power goals and stock map is fine with the size injectors we're using.

[@DJteamster]

Hi guys. While rebuilding the motor, did you guy's have the transmission gone through?

[@COMotorsports]

Stock transmission

[@xlunalifex]

Do you lubricate your valve seals before installing them?

[@COMotorsports]

They just tap on easy.

[@xlunalifex]

Jusy never thought of it guess, nicevideos

[@wayneywayna]

What would you recommend awp head or the aeb head with a Garrett gt28

[@COMotorsports]

Depends on power goals. As you can see from our 18hooptie videos we made 600whp on stock small port head and stock intake manifold.

[@wayneywayna]

@@COMotorsports stock valves or do they need upgraded? Looking at 500 to 600 at the wheel eventually

[@Continental719]

What head are you guys using on that build?

[@COMotorsports]

Stock small port, with upgraded valves/springs

[@noticeablystrange3021]

Are those stock pistons?

[@COMotorsports]

Yes

[@jerryfullen5043]

Did you reuse main caps...What hp you wanting to make

[@COMotorsports]

stock main caps yes.

[@davidamorfin4498]

Correct me if im wrong but i thought GLI came with vr6 until the mk5 ofc

[@COMotorsports]

Originally it did, then they got rid of the VR6 and the GLI came much nicer looking and with a 1.8t. The only VR6 after that in the mk4 was the r32.

[@stealthjuni]

whats the power your shooting for then ??

[@COMotorsports]

Watch the next video. :)

[@eddieflores8909]

Which dw pump? Is it the dw65v?

[@COMotorsports]

Not sure how I've missed some of these comments. Sorry for the delay. You are correct.

[@videosperrones1]

How much can stock piston hold?

[@jimelewa7861]

Every 1.8T is different

[@GCSEURO1982]

Did you replace the piston rings?

[@COMotorsports]

Nope, just regapped.

[@GCSEURO1982]

@@COMotorsports okay thank you I was just wondering if I should replace them when i replace the rods

[@COMotorsports]

@@GCSEURO1982 if you want to freshen up the engine them yes. But it would need to be honed.

[@223Jawa]

i have a question, you don't need forged piston ? Is the connecting rod enough? Thansk for the answer

[@COMotorsports]

Depends on your power goals. Whatch part 3 to see the power we made.

[@223Jawa]

@@COMotorsports yeah i see this video, i want around 350hp

[@COMotorsports]

@@223Jawa we can make 300-320whp on stock engine. 350whp you'd want to do rods.

[@223Jawa]

@@COMotorsports and how much torque?

[@COMotorsports]

@@223Jawa all depends on turbo selection. If you want something that will take some abuse do rods.

[@tirecchatman547]

We're u located how much a build like that cost

[@COMotorsports]

East coast Canada. Cost comes down to a ton of things. Parts used, existing parts on vehicle, power goals, software etc etc.

[@dmaxdan6612]

How much would you charge me to build this same exact setup? I live in California and just need to buy the car lol

[@COMotorsports]

There are many factors that come into play. Power goals, what the cars being used for, and what mods exist on the car. If you're interested in us doing an engine or turbo package for you drop us an email and we can work though the details.

[@dmaxdan6612]

@0000030331 have a good day bro

[@action76news]

Where is this shop at?

[@COMotorsports]

East coast Canada

[@humu1345]

Ballpark what’s the price on This?? For the build ??

[@COMotorsports]

All comes down to power goals, what the vehicle is being built/used for, and what the current mods are on the vehicle.

[@user-ct3kd3dq4y]

I’ll pay you to build my 1.8 jetta wolfsburg

[@Hectiic_Razor]

Is this Gills_gli?

[@COMotorsports]

It is not.

[@Hectiic_Razor]

CO Motorsports All good thanks for the reply, dope video as well, me and my buddy want to sometime down the road rebuild my 1.8T engine, but right now I’m stuck trying to pass smog because of the secondary air injection system :/

[@COMotorsports]

@@Hectiic_Razor yeah the rules are less strict here.

[@lisoulja1]

Very interested to know what's happening to the Grand Am

[@COMotorsports]

Bags believe it or not.

[@jeancharlesrabaux5658]

Is the 1L8 nos good is the 2L is ok culasse 16 soupapes titanes vilebrequin allégé renforcer pistons forger bielles titanes is soo good the big turbo et 1000 ch yes 2 L 16 s turbo renforcé tout le motors mais nos 1L8 the 2 L realeser les chemises et trouve une culasse 16 s et the numbers one