KILLER-LS1

iTrader: (18)

So i just bit the bullet on a new Comp Turbo Triple Ball Bearing, Billet wheel, billet center section, 88mm T6 Turbo!

I went down to their manufacturing facility in San Dimas, CA. It feels really good to be buying american They had half a dozen CNC machines making wheels and center sections right in front of me. Joe, the owner, is great to deal with and knows a ton about turbos!

I recently had my GT91 freshened up with new bearings, and the shop forgot to put loctite on the compressor wheel nut, so the wheel came loose and damaged the wheel

This new turbo is good for 1530 hp, flows 161 lbs/min and should spool significantly better than my GT91 now I can finally get some back to back dyno results with one of these!

Here are the specs on the Comp Turbo:
Compressor: 88mm ind 118mm exd
Turbine: Straight cut 94mm 94mm ind 94mm exd.
Im also excited to save some weight off the front end, The billet aluminum center section is supposed to save a good chunk of weight.

This is in comparison to my current GT91 turbine wheel of 94mm ind and 82mm exd. This should help my back pressure come down a little bit. I was still at 2:1 back pressure with the old turbo.

What do you guys think about me stepping down from a 91mm to a better flowing 88mm compressor wheel? They said the reduced mass of a smaller wheel, along with the ball bearings, will help it spool much better and still make more power than my last turbo!

Heres some side by side pics!:































This is from Comp's site:

Why choose Triplex Ceramic™ CT3B Technology

• Light weight turbo.
• Rebuildable.
• Rapid rotor acceleration.
• 99% mechanical efficiency.
• Engineered to outperform competition.
• Manufactured with aluminum components.
• Bearing service life is two to five times longer.
• 1 Year limited warranty.

The Triplex Ceramic ball bearing technology results in several important performance improvements compared to a conventional sleeve bearing systems. One important advantage is that the Triplex Ceramic can carry both axial and radial loads so that the need for a conventional thrust bearing is eliminated. The power loss attributed to a conventional thrust bearing is proportional to the fourth power of the radius and can amount to several horsepower at the high speeds at which turbochargers operate. The Triplex Ceramic is capable of carrying both high thrust loads and radial loads at the same time and usually absorb only fractions of a HP due to the anti friction characteristics.

The Triplex Ceramic Ceramic ***** are also 60% lighter than steel ***** and operate with lower vibration levels. Since centrifugal forces are significantly reduced at high speeds, their service life is two to five times longer. There is less heat build-up in the ceramic bearings during operation and they can reach operational speed up to 50% higher than steel ball bearings. These favorable mechanical characteristics of the ceramic ball bearings make them an ideal choice for turbocharger bearing systems that run at high operating speeds and are subjected to high exhaust gas temperatures.

KILLER-LS1

iTrader: (18)

Already sold the old Turbo!

Reject

iTrader: (24)

damn sounds great! cant wait to see some baby pix

KILLER-LS1

iTrader: (18)

Yeah same here. I talked to a couple of the turbo vendors on here, and it just seemed like nobody has much experience with these, but they seem very intruiging...

What do you all think about my turbine wheel choice?

98Z28CobraKiller

iTrader: (17)

It's not oil less is it? I like the dimensions. What's the A/R?

KILLER-LS1

iTrader: (18)

no, not oil-less,

Im using the same T6 1.08a/r that I had before. They are going to start building the center, and they will call me next week to finalize the wheel dimensions, so I still have some time to change it around

abbaskhan

Great choice. Excellent turbo.

LT1 ANDY

iTrader: (4)

The phenomena that is forced inductions GT is winding down if you ask me... Mine lasted 5 street miles1.5 Dyno pulls before its compressor nut backed off and damaged the wheel/housing. I'm intersted in yourvresults and pictures!


Andy

KILLER-LS1

iTrader: (18)

Wow, same thing here! After the thrust went out, I had comp rebuild it in hopes that I could just sell it. They pointed out that the shaft size was much smaller than they use, and that the thread direction is the same as wheel rotation (aka makes the nut come off easily) They upgraded my turbo to a better ARP nut, and it still came off and jacked the wheel up. They felt bad (even though it wasnt their fault) and are doing a trade-up so I can run their unit.

They use a reverse rotation thread on the shaft to prevent this.


I could start another whole thread about all my issues with FI messing up my orders, shipping incorrectly, never answering the phone etc.

I had to file a fraud claim on my credit card on my last order with them....

But enough about them! All is good now that I have something better on the way!

Anchor

Very interested to hear how you go. I'm trying to decide what turbo to run and was leaning towards a FI unit...

Does anyone know how much the comp turbo 88mm is?

Edit, found it
CT5X8894 Oil Only Triplex Ceramic .90/1.00/1.10/1.25/1.32 5"V-Band $3,019.00 - boostlab.com

MillsMotorvation

Been there, and still there with the trouble, but I think it should be alot quicker spooling! Dont know much about 88s, but its time to learn, good luck!

abbaskhan

The billet 88mm race version has been nearly 200mph in the 1/4.

I have a 82mm. And oilless on my brothers Ford gt tt....i think 1300-1400rwhp is easy for this turbo setup right.

deeloc1

iTrader: (20)

Nice! I'm in for results! I have the comp 8079 oil-less CT5-Z. Depending on how your 88 performs, i may return it and get the same turbo. I've been thinking about back pressure issues coming up and i'm kinda leaning towards taking the turbo back while it's still new and trading it for a CT5-X with the larger turbine to help with back pressure. My conscience literally keeps telling me take the turbo back...take the turbo back...so i think that's what i may end up doing regardless...lol! Goodluck bro with the new turbo!

KILLER-LS1

iTrader: (18)

What size turbine wheel comes on yours?

deeloc1

iTrader: (20)

Compressor = 80mm, turbine = 79mm (100 trim). Sprayed01 made decent power with his 370...almost 800rwhp with pump gas and meth. Talon77 made almost 800rwhp with a 5.3 and e85. Both of these guys used The CT43 8079 with stock heads...except Talon77's was the oil-less version. I'm looking to make a little more than them though I have goals of 900+ rwhp (hopefully 1000rwhp) with a max of 20psi on 91 and meth or e85. Hopefully my better heads, intake and 3 more pounds of boost will get me where i want to be. My turbo is the CT5-Z 8079 oil-less which basically has the same specs as theirs but with a CT5 cover EDIT: also has higher flowing billet compressor. You can see the difference in the compressor designs in the pics. Justin @Comp, said my turbo flows 133lbs /min and rated to near 1300hp.

Heres's mine CT5Z 8079


Here's the CT43 8079

Apocalypse

Nice! Not to thread jack KILLER-LS1 but since they not done with your turbo i'd call and see if you have the new Extended tip compressor wheel. I just got mine. I'd advice you to get it lol. Tell'm Dwight sent you lol.

skinnies

iTrader: (33)

Be interesting to see what it makes, when I talked to comp they said the 8079 would make 1000+ rwhp easily, but I'm just not sure it will on our ls stuff.

SPRAYED 01

iTrader: (22)

I don't know about 1000whp. I love my 80/79 ct43 but on a larger ls motor I think you would have pretty high bp at that level. Mine does almost 800whp at 17psi through stock heads and intake but power starts to die in the mid 5k rpm range. I think its almost out of turbo. I'm also through a 9 inch and locked auto so maybe a m6 10 bolt could show a higher number.

skinnies

iTrader: (33)

I really am not convinced it is any better the the precision 7675.

SPRAYED 01

iTrader: (22)

Skinnies, you are probably right. I think at the end of the day the precision and my comp are about the same. Comp is a very new company compared to precision,mine is about 18 months old. They are In their early stages and come out with new designs all the time. Great customer service too.