lee101315

Over the weekend, I installed a k27/8 turbo, tail wastegate, Lindsey racing afm chips, and a silicone 3" intake boot. Previous modifications were a 3 bar fpr, 2.5" test pipe, borla xr-1 muffler and an autothority chip set.

At first startup the car idled much smoother than it did with the autothority chips. Off boost, the throttle response improved greatly. Boost is set to 16psi, and it comes on strong between 3200-3500 rpm.

It's been a year or so since I've had a k26/8, but I barely notice any difference in lag compared to a k27/8. I'm not sure how much power I'm making, I'd love to crank it up to 18-20 psi once I install the wide band afr gauge and smt-6 I have lying around. This is a great setup for a daily driver, I like it a lot more than the super 75 I have on my other 951.

racerxrick

nice to hear...your up and rolling! Obviously from your earlier post I didn't have a clue on vacuum routing for the Tial (opposite!). Sounds like your happy with the mid range which can sure make these cars fun! Good job.

I know we have some similarities...stock AFM with the LR 3" J boot and limited exhaust. I'm also afraid to crank it up as I don't know where my A/F is either.

You may have saw that I had a vacuum/pressure leak and repairing that has helped my mid range a bunch. I'm ordering a silicone vacuum line kit tomorrow! I kept it at 16psi for now. If i can find a shop tomorrow I'll get a few dyno pulls in. Thinking of getting Lindsey's 4" steel exhaust with the bung welded in for the WB.

Have fun...and keep us posted!!!

MooreBoost

you guys need a maf. get a stainless exhaust and not steel

racerxrick

haha..

toddk911

Agreed. All those mods and you guys are still running a barn door afm? Get a maf asap!

Mooreboost: Curious with your track car and that boost and a lot of LR parts you are not running the LR 4" ??

MooreBoost

i had the 3" before i got the super75. ive only had the big turbo for about 5 months and its awesome. i plan on selling the race car and building a new track car (streetable) 3ltr gt40 monster with 5" exhaust

racerxrick

I didn't want to hijack Lee's thread. I see that he has another big turbo 951..this one appears to be his DD!

And yes..agreed on the MAF.

Sounds like he's happy with the perfromance he has now..great!

toddk911

Nice. So you are running the 75 like I am. I assume the 23psi in on race gas?

5"??? Sick!!!

Do you think there is much differnce in going from 3" cat back to 4" cat back vs going full 3" turbo back?

I am thinking in velocity stack path here in stock down pipe, to 3" to cat area and then 4" rest of the way to 4"in/out muffler. ??

MooreBoost

with the big turbo a bigger exhaust is a must. u want that turbo to breathe. i have a mafterburner and run 23psi on 91 pump and 26psi on race fuel. easy to switch the two maps with mafterburner and a 2 stage boost controller. ive only ran the new turbo at an open lapping day at the track. there are a lot of subarus down here that run at the track(dont know why) with 400+ hp and with the 75 i do laps around them

lee why dont you like your super 75? is it a #8 or 10?

Stephencs601

I like the Lindsey stuff. David is a great source if info and knows his products. I have a lot of his stuff and am putting out to the rear 360+hp in my 951.

lee101315

Racerxrick, glad you got everything evened out, these cars run great with afms up to about 330-350 whp. I really don't see a huge difference in power between a 2.5" catless and a 3" catless, maybe it spools up a bit quicker, but I'm happy for now. I'll be cranking the boost up when I get the wideband and smt-6 up and running...

As for the super 75, mine has a number 8 hotside. One thing I should mention, is when you put the Lindsey #8 next to the Porsche #8, it's far larger. You could basically consider the Lindsey #8 a Porsche #10 hotside.

I was running my super 75 with an afm and chips, not the most efficient. I feel it's too laggy of a turbo for less than 400hp... I have the engine out of my other 951, so I'll be beefing up the internals, going to a Maf setup, and cranking that turbo to 30+psi.

But honestly speaking, for less than 800 bucks, I consider the afm chip/k27 upgrade the best bang for the buck. It's far more streetable than the super75, and I believe you still get 315-320whp with this setup.

racerxrick

nice...was hoping to get a few dyno pulls today. Haven't been able to get a last minute appt!

azbanks

What specific benefits do you see in running stainless instead of regular steel?

86 951 Driver

So you are running the K27/8 turbo on your car? Did you get it from lindsey? I have one sitting my garage trying to decide if I should go this route or not? What mods did you all have to get to support the turbo?

When does the turbo start to spool? Is it a huge different from the k26/6 is it streetable or too laggy for a daily driver?

toddk911

Yes, many have said even from way back that the k27 and matched chip is a hell of a lotta bang for the buck.