mr944

Just wondering if anyone here is running a Lindsey Racing Super 61 P trim turbo on their 2.5l? Any thoughts and opinions would be great. If anyone has any dyno results and opinions on if going ball bearing is worth it.


thanks

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I have two 944 turbos, one with a S61 stage 3, and the other has a billet K26/9 that one of the rennlist guys made. The billet K26/9 out performs the S61 on the dyno in spool characteristics and HP. I have been happy with my S61 for two seasons, and I have highly recommended it in the past, but recently I have not been getting the level of support that I had come to expect from them.

My M-tune S61 does 260 wheel on a mustang dyno at 17ish psi. That's probably closer to "almost" 300 on dyno jet. I'll have full boost by 3400 RPM in 4th gear. Perfect for my S2 gear box, but maybe a bit laggy for a standard turbo gear box.

mr944

What's your setup??? I figured with that kind of turbo you would have higher
power goals. I too have an s2 gearbox so that doesn't worry me.

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3" exhaust
tial wastegate
Lindsey M-tune.
Super 61 turbo
Manual boost controller.

The problem with that turbo is supposedly that it's for larger displacement so its most efficient closer to 15psi... on a bigger engine.
Shared my numbers with Lindsey. They told me "something is wrong", but have no suggestions as to what it could be. my AFR's are good, and the M-tune runs smooth.

blade7

Something does sound wrong, a couple of people over here are running a super 61 with Vitesse MAF kits and they are very happy.

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It's hard to say what's going on. I'll probably look into rewiring the knock sensor this spring and see if that has any effect on it. Sometimes the car feels sleepy, but sometimes it feels really strong. Mustang dynos tend to read low, like I side, so it's likely 260 x 1.15 ish. that's not wildly off the mark considering it doesn't have a ton of bolt ons. I dynoed the car on a day when there was a group, and several guys were complaining that the numbers were low. I'll revisit it when the weather is better. I certainly was non plussed with Lindsey's interest level in what was going on.

NCLA951

I made 353WHP with a ported 27/6 and stock AFM, you should be making MUCH more power with that set up.

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Yes, Life is full of little mysteries. Its hard to compare between different dynos. I would wager your dyno bill that you wouldn't do 350 on this particular dyno. I have good air fuels, solid boost, and a sloid engine. The only other culprit could be timing. I'm running an off the shelf M-tune. The car runs strong on the road. Who knows, I'll keep playing with it.

mr944

I've just rebuilt my motor added Carrillo rods and Wossner pistons, while I was in there. Other than that the engine is stock. Head is stock, just new valve stem seals. I have a full 3" exhaust from the downpipe with no cat. LR M tune, Tial Wastegate and Turbonetics dual stage boost controller. The turbo is a T04E 50 trim stage 3 turbine turbo built by Turbo Engineering Corp (TEC). I'm having oiling issues with the turbo so essentially I'm saying screw it, lets replace it. I enjoy the way the car drives with it, but I feel that there's more potential to it. I'm thinking a new turbo is the solution, which has lead me to the Lindsey Super 61. Obviously since I'm in there doing the turbo I plan on installing a 3" downpipe.

Now before I bite the bullet and spend quite a big chunk of change, I'd like to get some feedback.

blade7

I don't know how a ST3 compares to a KKK no.8 housing but obviously when Porsche went from 220 to 250 bhp they used a bigger turbine. A T04E matched to something not much bigger than a KKK 8 seems like a heat pump to me. Though when I asked here how the S61-10 ST5 I've got would work on a 2.5 most said it's too big, so what do I know .

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I doubt that the Lindsey flavor of the T04 turbo is going to be huge improvement over the T04 that you already have. Just get it rebuilt. You will be disappointed if you use Lindsey's dyno charts to guide your decision making.

pole position

Unless you are willing to run 20 psi plus the LR 61 is simply to big for a 2.5 and even then it is all top end and a dog down low. The back pressure on the KKK or replica housings is immense coupled with those huge compressor wheels/housings.

As far as dyno charts.......350 whp in a 2800 -2900 pound car should translate to a approx 125 trap at sea level.......I am confident that said car is way , way below that . Trap speed does not need a driver mod it shows what is shows irregardless of shidy driving.

blade7

I've driven a 2.5 with a LR75 and it did feel flat below 4k, from memory it started pulling around 4.5k and flew above 5k though. Seeing as the LR 61 is a couple of sizes smaller it must be better...

t0mbo

I know this thread is dead, but I wanted to post my experience/opinion for future owners using the search function. I have a Lindsey Super 61-8 with twin ball bearing on a stock 2.5l bottom end. My setup is- the aforementioned Super 61 TBB, Lindsey Stage 2 intercooler, Lindsey MBC, M-Tune with MAF, full 3" exhaust, Bosch 044 fuel pump, 80lb injectors, wildfire HG, spec clutch, and all of the other little items that go with a this setup that I'm sure I'm forgetting. Boost is currently set at 21psi. Overall, I would categorize the driving impression as insane- I've only been able to use full throttle a handful of times and most times I'm using 1/4 to 1/3 throttle, even to pass "fast" cars. I am estimating around 360rwhp - 380rwhp , but that is just an estimate until I get it on a dyno for final tuning. The car is a 100% street/canyon car.

I drove a friends '87 bone stock K26 951 back to back with mine, and boost comes on very similarly at about the same rpm in all gears except 1st. When it does come on boost the S61 is a completely different animal and builds boost far faster than stock. Once boost passes 19psi it starts screaming like a Stuka dive bomber... which I love. UNFORTUNATELY this also means I can't ever turn the boost down below 19psi. The sound is WAY too sweet for that

I chose the turbo based on my mechanics recommendation and the superb customer service and products I had received from Lindsey Racing previously. I chose the TBB because of longevity (planning on this being a long term car) and spool characteristics. Overall I'm very happy, however IF I could go back and do it over again I would probably choose a Super 48 TBB, or have a custom smaller turbo built by Evergreen or maybe Vitesse (based on RL reviews) since I was/am aiming for less than 400rwhp and I drive it exclusively on the street, often at speeds that rarely get me out of 2nd gear. That being said, it's a great turbocharger and is a ton of fun. Again, this is just my opinion based on my personal experience.

blade7

Thanks for the update . Someone over here with a BB turbo used to get the 'Stuka' noise at high boost. Not sure if that's normal with BB turbos?