Turbos: To Ball-Bearing or Not to Ball-Bearing
11-07-2003, 03:33 PM
#16
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I recently spoke to both Ryan and Joe at Turbonetics.
They said the ballbearing would definately spool-up faster, sometimes as much as 500 rpm. They tested the double ball bearing type and found almost no difference than the single. They stated that all of the thrust is on the exhaust side of the turbine so this is where the BB comes into play. There is almost no thrust on the other side so a dual is not worth it.
That being said, there is about a $400 difference between the thrust and single BB. Something worth it?
Vitesse states on their site that Stage 2 has full boost at 3700 - 3900 rpm. How much lower does the fast spool option lower it.
M
They said the ballbearing would definately spool-up faster, sometimes as much as 500 rpm. They tested the double ball bearing type and found almost no difference than the single. They stated that all of the thrust is on the exhaust side of the turbine so this is where the BB comes into play. There is almost no thrust on the other side so a dual is not worth it.
That being said, there is about a $400 difference between the thrust and single BB. Something worth it?
Vitesse states on their site that Stage 2 has full boost at 3700 - 3900 rpm. How much lower does the fast spool option lower it.
M
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11-07-2003, 05:58 PM
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Originally posted by mslovak1
Vitesse states on their site that Stage 2 has full boost at 3700 - 3900 rpm. How much lower does the fast spool option lower it.
M
Vitesse states on their site that Stage 2 has full boost at 3700 - 3900 rpm. How much lower does the fast spool option lower it.
M
11-08-2003, 07:50 AM
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JimboIII,
My turbo is a Kokeln sold by Lindsey Racing . With these TO4 frames you can make about any combo you want including the 60 trim in the TO4B . If you use your search engine and look up Garrett compressor maps for the TO4B and TO4E you can see the flow numbers. I always thought the TO4E was the high horsepower frame , but the compressor maps show with the same trim the TO4B is capable of making more power.
Mark
My turbo is a Kokeln sold by Lindsey Racing . With these TO4 frames you can make about any combo you want including the 60 trim in the TO4B . If you use your search engine and look up Garrett compressor maps for the TO4B and TO4E you can see the flow numbers. I always thought the TO4E was the high horsepower frame , but the compressor maps show with the same trim the TO4B is capable of making more power.
Mark
11-08-2003, 10:52 AM
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Mark Szalaiy just wondering why you went with a 60 trim and not the standard v or h trim witch come standard on the b housing and are a newer type compressor. Judging from your trap speeds it looks like a good combo. What boost were you running and have you ever bin on a dyno?
11-08-2003, 11:59 AM
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Jimbolll,
That turbo is the one Lindsey Racing sells as their Club Turbo . It was a package that they had tested to get their 363 rwhp.
I am running 18# of boost, I just ran again this morning in 40 degree weather and ran a 12.26 @ 121mph. Again with little traction with my 245/ 45/ 16 BFG comp T/A's.
My G-tech said 330rwhp.... But another rennlist member said the G-tech was off 30rwhp when he dyno'd his car. So maybe 360rwhp . It would be great if that is what I'm really getting.
I'll have to get it on a real dyno this winter. I don't know what the letter system (v and h trim ) is , all I've seen on compressor sites are the numbers ( 45,57, 60 ,62 ) etc...
That turbo is the one Lindsey Racing sells as their Club Turbo . It was a package that they had tested to get their 363 rwhp.
I am running 18# of boost, I just ran again this morning in 40 degree weather and ran a 12.26 @ 121mph. Again with little traction with my 245/ 45/ 16 BFG comp T/A's.
My G-tech said 330rwhp.... But another rennlist member said the G-tech was off 30rwhp when he dyno'd his car. So maybe 360rwhp . It would be great if that is what I'm really getting.
I'll have to get it on a real dyno this winter. I don't know what the letter system (v and h trim ) is , all I've seen on compressor sites are the numbers ( 45,57, 60 ,62 ) etc...
11-08-2003, 01:01 PM
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Mark nice numbers. Are you sure its just the motor. Maybe you have some skills launching these cars. They are not the easiest to drag race so you must know something. What is your trick 
?
?
11-08-2003, 01:25 PM
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All I know is , if you launch at 3000 to 3500rpm's it bogs , but.... if you launch at 5000rpm's it hops. So I come out at 4000rpm's and feather the throttle a little , 1st gear is used up very quickly , 2nd is also a spin fest but it still goes like stink.( 4.175 to 60mph, 8.7 to 100 on the 12.26 run )
One year ago when I went to IRP I hooked up the G-tech to see how close it was to the drag strip, when I ran a 13.16 the G-tech was 13.17, 13.01 the G-tech was 13.02 , a couple more runs were the same times . The only time it was off more than a 100th of a sec., was when I ran a 12.91 and the G-tech was a 12.87.
Mark
One year ago when I went to IRP I hooked up the G-tech to see how close it was to the drag strip, when I ran a 13.16 the G-tech was 13.17, 13.01 the G-tech was 13.02 , a couple more runs were the same times . The only time it was off more than a 100th of a sec., was when I ran a 12.91 and the G-tech was a 12.87.
Mark
11-08-2003, 07:12 PM
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Yeh it's pretty accurate. But the trap speeds are 3 mph faster with the G-tech. It times from 0 to the end of the quarter mile, and the track times the last 60 ft. and then calculates the trap speed.
Mark
Mark
11-14-2003, 05:19 AM
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With my old 2.5 (dyno'd orig. @ 434 h/p) the G-Tech was the most accurate rwhp figure I saw. One rw-dyno showed more than the 434??? The G-Tech showed 392. The lowest of 3 dyno's. I had virtually the exact same results as Mark, from drag strip comparisons. Time, spot on. Speed, optimistic.
11-15-2003, 01:34 AM
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I'll share my results from my 951 as it has evolved for what it's worth...
These are real numbers on the same dynojet with race gas....keep in mind the results vary a little...I think it depended upon various temp, ect...but these are what Chris got with reliable settings with race gas...I've never blown a head gasket or anything else..keep in mind it's a street car that I changed the oil more than needed and the car never ran hot, ect....
K27DR quick spool w/MAF, chips,Band B exhaust...280WHP
K27#8 with frsh head 320-329
Technodyne Gt type dual BB turbo , EM thingy, bigger injectors, tuning..got rid of the tri-flow muffler installed a straight thru or stock muffler and it made 397.xxWHP quicker spool...The boost levels sound high but it's reliable on the street or DE's.
No problems..blown HG's, ect....
Paul
These are real numbers on the same dynojet with race gas....keep in mind the results vary a little...I think it depended upon various temp, ect...but these are what Chris got with reliable settings with race gas...I've never blown a head gasket or anything else..keep in mind it's a street car that I changed the oil more than needed and the car never ran hot, ect....
K27DR quick spool w/MAF, chips,Band B exhaust...280WHP
K27#8 with frsh head 320-329
Technodyne Gt type dual BB turbo , EM thingy, bigger injectors, tuning..got rid of the tri-flow muffler installed a straight thru or stock muffler and it made 397.xxWHP quicker spool...The boost levels sound high but it's reliable on the street or DE's.
No problems..blown HG's, ect....
Paul
11-15-2003, 04:30 AM
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I think G-tech needs to work on their dyno! Everyone's numbers seem to be off the mark. I guess I really don't care what my car dyno's at, just as long as it satisfies my need for speed !!
