john evans
New Member
- Joined
- Dec 5, 2002
- Messages
- 85
hey guys, in everybody's opinion,is it worth an extra 500.00 to have ball bearings on a cpt66 or is a gt67 comparible,non bb.
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SignUp Now!its sort of not worth it IMO to go BB unless you are a serious racer and beat the hell of the car by running high boost.
Actually (and not trying to start trouble) if the car is more drag race oriented then there is no benefit to running a ball bearing. This is definitely true if launching off a trans brake as you have to bring the car to a complete stop before engaging the brake. Once on the brake you will be launching approximately 800-1000 rpms higher than your convertor's stall speed. There should be no issue spooling ANY turbo on a trans brake since you are loading the engine with the transmission
IIRC, all the large frame turbos (such as those larger than 80mm) are not available in a ball bearing. Maybe it is because they are basically race only pieces.
Originally posted by JCotton
Actually Lee, you are misinformed on all counts.... Not looking to start a war here either, but ...... let me share if I can without, hopefully, ruffleing any feathers or egos.
First I'll say I drag race, alot.... I also use BB turbos and have also used non BB turbos. What we have found over the years, whether one is racing a pro tree or sportsman, spool up is the most important phase or racing, races are won and lost at the starting line, more often than at the finish line. I typically go into the lites cold, meaning I roll in at idle, on a pro tree, that gives me less than 2 seconds to get up on boost. Not an easy task..... My other option is to go in "hot", as we have seen in the past, lots can go wrong fast when trying to engage the trans brake and load the trans.......... rolling through the 2nd lite usually ends with a red lite. Hence the extra time I gain with a BB turbo, I believe is worth every penny of it. I also believe my BB turbo saves lots of wear and tear on my trans and motor since I don't have to stage "hot". Lastly, there are issue with spoling a turbo with or without a transbrake, when it is slow spooling, possibly due to a tight convertor or just a larger turbo, racers tend to run the big number test and tuning, since there is no rush to cut a lite, they can sit there however long it takes to get on boost and launch at their leisure. Come first round, cutting a lite becomes critical, especially when the guy in the next lane can turn a competitive number. I'll take a bb turbo, any day, makes a differance....![]()
Again, not true. Tubonetics offers all of the Y2K line of turbos in BB, T76,80,82 and 88.
Hope this clears up things, just sharing my experience. Hope this doesn't rile the "Gods"![]()
But the FACT is that when launching at high rpm BB or non BB makes no difference
Originally posted by JCotton
Don't worry Lee, I wasn't referring to you as one of the "Gods" I appreciate your attempt at productive, informative info, it's just unfortunate how inaccurate it usually is. No need to debate anything with you, I've already had enough experience there to realize it's wasted time on my part, just like to see accurate info passed on.
I was wrong, since you have just changed your original statement concerning "spooling",launching" is the step after spooling, they are both pretty close in the time it takes to achieve full boost.![]()
As for Mustangs................ not alot in common when it comes to 8 cylinders vs our 6 cylinders, but since I race in several Heads up classes with other v8 cars and have seen some of these very fast Mustangs, I have seen many with Turbonetic BB turbos, for what it's worth.
One last statement, why is it guys with no BB experience feel a need to share what they think they know? If I could get the performance I am looking for with a cheaper turbo, don't you think I would use it. I think it is comicalto compare me with cars that run larger turbos than me, not to mention usually 10 more lbs of boost...............