Lindsey super series turbo w/ ball bearing CHRA

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01-14-2011, 01:52 AM

#16

s14kev

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Quote:

Originally Posted by Tms951

I would like to preface this by saying I have had two identical Super 75s. Both were P-trim in a .58 a/r TO4e housing. Both on a the same 2.8L engine, in the same car. The second one has the dual ball bearing center.

To me the biggest difference was at the sub 4000rpm levels. With out the DBB the car was useless. It could not build any boost fast enough to be useful.

With the DBB it was very easy to get boost in the 2500-4000 rpm level. The boost was limited to the 5-10psi level. In the 3000rpm range it was quick and easy to get ~8psi. This made the car drivable as you always had enough torque on demand to move the car with out shifting.

I don't really feel it builds boost that much earlier in the rpm range than a journal bearing turbo. It does however build that level of boost much quicker, which equates to faster response and better drive-ability.

This is excellent. The kind of info we need on these boards. I would consider that this response is well worth the $300-500 premium it costs for a DBB compared to a plain journal.

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03-03-2012, 06:19 PM

#17

brandon19761

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Im running a super53 journal bearing on my '88. It pulls really hard once in boost, but the lag is rediculous. I think I may try a super61 BB on my '89, or wait and go GT30. I was told the the super53 would have decent spool characteristics, but that's not the case. The car IS running pig rich though- 10:1 at full boost.Maybe that's the culprit.??

I had it set to 20psi for a short period and it pulls like a freight train at that level.

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03-03-2012, 07:37 PM

#18

Fluidplay

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Quote:

Originally Posted by brandon19761

Try pulling some fuel out 10:1 is too fat. You'll feel much better reponse with with the S53 with an AFR of 11:8 at full boost

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03-03-2012, 07:49 PM

#19

brandon19761

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Quote:

Originally Posted by Fluidplay

Try pulling some fuel out 10:1 is too fat. You'll feel much better reponse with with the S53 with an AFR of 11:8 at full boost

Okay. I'll go mess with the voltage sliders on the maf. I wasn't sure what a good a/f ratio was on these engines. I am using the suggested maf file for my 55# injectors from LR but haven't tried tweeking it yet (was too busy with other projects) now I'm back to this car so I'll try messing with the maf to lean it out some...

Thanks.

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08-04-2013, 02:17 PM

#20

mahoney944

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i have a super 65 with the standard 360 bearings with a p trim hot housing. in my opinion it has the best of both worlds. seems to have very minimal lag with enough power as youll ever need for a street/ track application. when ordering for lindsey you also get the option for a wet and dry configuration, i was on the fence with this for a long time, i decided to go with a dry setup. that eliminated a good deal of hoses and potiential leaks. ive been running the turbo hard for about 2500 miles and have no issues and i couldnt be happier with it. i also recommend upgrading the exhaust when you do this because the super series turbos have a 3in outlet and the stock downpipe and exhaust woud be restrictive. i have a 4 in big flow on mine and have minimal back pressure under high boost.

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08-04-2013, 04:00 PM

#21

pole position

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New options

You can get this http://www.precisionturbo.net/news/P...-Available/201

with this http://www.precisionturbo.net/Street...-CEA%C2%AE/232

or this http://www.precisionturbo.net/Street...-CEA%C2%AE/233

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08-04-2013, 05:12 PM

#22

refresh951

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Quote:

Originally Posted by pole position

Thanks for posting! Interesting indeed.

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08-04-2013, 08:46 PM

#23

Zeff

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That is cool

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08-04-2013, 08:57 PM

#24

86 951 Driver

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Quote:

Originally Posted by pole position

IS the k26 housing modified to eliminate back pressure? What is different about it than the stock 6 exhaust housing?

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08-04-2013, 10:05 PM

#25

pole position

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The precision hot side has nothing in common with the KKK besides the flange/ bolt spacing, it is not a replica.
The KKK # 6 has a approx 048 AR , the # 8 0.63 AR. The Precision is 0.82 AR

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08-04-2013, 10:13 PM

#26

pole position

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And there is not a lot of difference between the # 6,8 or 10 KKK housings when you compare them side by side, the "flow"or back pressure is equally restrictive due to its almost 30 year d design .

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08-05-2013, 07:58 AM

#27

jmj951

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Quote:

Originally Posted by pole position

The precision hot side has nothing in common with the KKK besides the flange/ bolt spacing, it is not a replica.
The KKK # 6 has a approx 048 AR , the # 8 0.63 AR. The Precision is 0.82 AR

This offering with compatibility to the K26 exhaust mounting points is interesting. Other than matching up to the crossover and downpipe, what about the mounting and plumbing on a 951? Any fabrication required for mounting?