Comp turbos. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 05-12-2010, 02:29 PM   #1
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default Comp turbos.

Have any of you tried comp turbos?

A friend with a GTR suggested them and im trying to see what the deal is.

they offer some pretty nice features on their stuff, but you pay for it...


My 28RS just died this week and im looking into other options before i say **** it and toss a new one in.

My main grudge with garrett turbos when comparing to other big brands is the lack of quality in the casting. Precision turbos appear to be a much higher quality casting and such (that being said i have no experiance with them) but dont make anything small enough for my goals (nor 99% of us here)


Thanks guys,

Matt
shlammed is offline   Reply With Quote
Old 05-12-2010, 02:43 PM   #2
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

TurboTim on here is your best source of info for that, he ran a more typical TT setup, with two GT15s IIRC. So parralell rather than series.

Comp. charging is pretty sweet IMHO. I keep getting this idea to do a basic cold-side MP62 and a GT3071 on a built bottom end. Then I take a good look at V8 swaps which would be a bit more hassle but likely much better in overall terms. I doubt I will do either option when I look at it realisticly.

If you wanted to do it with two turbos, I wonder about a setup with a remote mount (the STS that has been brought up in here recently). It would get around some space concerns. The thing is, you would want the turbo mounted traditionaly to be the more responsive of the two, as the one in back would probably be a bit lazy even if it was something like a 2554. So now you have this quick spooler off the manifold, which acts as a restriction and probably hinders the larger one way out back quite a bit. Not to mention the pile of plumbing involved, the oil feed/return issues, etc.

1.8 swap might be a better route, save for having to switch all your stuff.
Sparetire is offline   Reply With Quote
Old 05-12-2010, 02:47 PM   #3
Elite Member
iTrader: (24)
 
Join Date: Jul 2007
Location: Cypress, TX
Posts: 3,778
Total Cats: 35
Default

Uh, he's talking about the brand of turbochargers. Not compound turbocharging.

www.compturbo.com
Bryce is offline   Reply With Quote
Old 05-12-2010, 02:56 PM   #4
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

what Bryce said... i thought i was clear when i was comparing brands.
shlammed is offline   Reply With Quote
Old 05-12-2010, 02:56 PM   #5
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Looks like just another place using Garrett and Borg Warner parts with their own custom ball bearing center section.
neogenesis2004 is offline   Reply With Quote
Old 05-12-2010, 02:59 PM   #6
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by Sparetire View Post
TurboTim on here is your best source of info for that, he ran a more typical TT setup, with two GT15s IIRC. So parralell rather than series.

Comp. charging is pretty sweet IMHO. I keep getting this idea to do a basic cold-side MP62 and a GT3071 on a built bottom end. Then I take a good look at V8 swaps which would be a bit more hassle but likely much better in overall terms. I doubt I will do either option when I look at it realisticly.

If you wanted to do it with two turbos, I wonder about a setup with a remote mount (the STS that has been brought up in here recently). It would get around some space concerns. The thing is, you would want the turbo mounted traditionaly to be the more responsive of the two, as the one in back would probably be a bit lazy even if it was something like a 2554. So now you have this quick spooler off the manifold, which acts as a restriction and probably hinders the larger one way out back quite a bit. Not to mention the pile of plumbing involved, the oil feed/return issues, etc.

1.8 swap might be a better route, save for having to switch all your stuff.
*facepalm*
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-12-2010, 03:40 PM   #7
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by neogenesis2004 View Post
Looks like just another place using Garrett and Borg Warner parts with their own custom ball bearing center section.
no way, they do so much more....look at the red turbine:

yes, I know its hard to believe, but that is actual red paint.
hustler is offline   Reply With Quote
Old 05-12-2010, 04:11 PM   #8
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

I suck.
Sparetire is offline   Reply With Quote
Old 05-12-2010, 04:15 PM   #9
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

I am not trying to debate their floor models and their ability to coat things colorfully.

Has anyone had any experience with them?

Their center sections (from friends word of mouth) are supposed to be magical.
shlammed is offline   Reply With Quote
Old 05-12-2010, 04:20 PM   #10
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

They do mention triple ball bearing in a few places with regard to their turbos on that site, I guess as opposed to a dual ball bearing from a normal Garrett CHRA. What I dont see is anything like a comp map or rpm/time data for a given Lbs/Mn flow at a given EGT or anything that would be useful for a spool/power/efficiency comparo.
Sparetire is offline   Reply With Quote
Old 05-12-2010, 04:20 PM   #11
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

Define 'magical'...
thagr81 us is offline   Reply With Quote
Old 05-12-2010, 04:26 PM   #12
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

magical as in on the GTR cars that have had them installed, they actually perform as advertised on the website... spool harder and are quite efficient.

i have an email into them to get an idea what they suggest, and for some literature on them such as efficency maps and wheel specs.
shlammed is offline   Reply With Quote
Old 05-12-2010, 04:57 PM   #13
Newb
 
Join Date: May 2010
Posts: 2
Total Cats: 0
Default

Quote:
Originally Posted by neogenesis2004 View Post
Looks like just another place using Garrett and Borg Warner parts with their own custom ball bearing center section.
ding ding ding we have a winner
jetspeedz is offline   Reply With Quote
Old 05-12-2010, 08:23 PM   #14
Junior Member
 
Join Date: Jun 2005
Posts: 166
Total Cats: 11
Default

friend of mine just dynoed his saab race car, 604whp, using a comp turbo, not sure of the specs, but it pulled harder, earlier etc than the similar garret unit he had earlier. another friend has put one in his RB26 powered 180sx.. but that is not dynoed yet.. seems to work ok.. does pretty much what they claim it will.. or so it seems so far..
hf-mx5t is offline   Reply With Quote
Old 05-12-2010, 08:34 PM   #15
Elite Member
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

Quote:
Originally Posted by compturbo.com
from this successful patented design, they have now developed a mid frame s400 model, a t2 model replacement and an oil-less turbocharger that will be available in june 2010.
orly?
Jeff_Ciesielski is offline   Reply With Quote
Old 05-13-2010, 12:45 AM   #16
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

I read that too... it has to be some type of self contained pack and i would assume it would only be reccomended for full out racing... i.e. good for no more than a day.

Although if they could get that to last a year with cheap rebuilds, or electromagnetic feilds to hold an impeller in place while rotating at 100% efficiency... i would be very interested and wait that month.
shlammed is offline   Reply With Quote
Old 05-13-2010, 03:08 AM   #17
Senior Member
iTrader: (1)
 
Join Date: Jul 2009
Location: Batavia, IL
Posts: 604
Total Cats: 0
Default

Quote:
Originally Posted by shlammed View Post
I read that too... it has to be some type of self contained pack and i would assume it would only be reccomended for full out racing... i.e. good for no more than a day.

Although if they could get that to last a year with cheap rebuilds, or electromagnetic feilds to hold an impeller in place while rotating at 100% efficiency... i would be very interested and wait that month.
Earnshaw's Theorem [1842]. No, diamagnetism won't work for this application.

"Self-contained pack" was used on turbine equipment 30 years ago, which commonly was associated with the term coked-up bearings.

Most importantly, THERE ARE NO COMPRESSOR MAPS. Unless you are willing to go by faith and by people's opinions and words of mouth "yeah dude it gave me so much more power!!" without any proof of flow rates and efficiencies and surge lines and what not that can be used to compare and determine the best application for your motor, I would rather put my spare $1000 elsewhere. The GTX-R compressor vanes and maps look reallllly fine.

I am, however, a big advocate of ceramic ball bearings and less rotational mass.

Sorry, I don't have any experience with this turbo, so I am no help. Just my 2 pence
Cococarbine3 is offline   Reply With Quote
Old 05-13-2010, 11:38 AM   #18
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

Thanks dude,

Like i said, i have an email into comp to get an idea of what trim they suggest and the correlative turbine maps.
It would also be nice to see hard spool data compared to a similar dual bb turbo.

Main question here was in regards to has anyone used them and what do they think of it, have you had any issues with it, etc.



I was going to build an engine next month but this put that behind shedule. So im getting a turbo that is ready for a built 1.6 and limping on the stock engine for a while again... 2860 may be reaching its efficency max where i want to push it to.
shlammed is offline   Reply With Quote
Old 05-13-2010, 12:13 PM   #19
Elite Member
Thread Starter
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

Oh, another thing... apparently you can rebuild the triple ballbearing centers for 150$... just some new cartridges and bam... done.
That to me sounds like a worthy investment.
shlammed is offline   Reply With Quote
Old 05-13-2010, 12:15 PM   #20
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

In for email results on compressor maps... ^ O rry?
thagr81 us is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
Complete BEGI S3 NB Kit, Full Enthuza 3" Exhaust, ACT HD Clutch, MS2 PNP, Wideband kronikker Miata parts for sale/trade 17 10-06-2015 11:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Replacing one tire nigelt Wheels and Tires 7 09-22-2015 01:32 PM
'92 tune, built motor whinin MEGAsquirt 0 09-15-2015 09:37 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:58 PM.