what's the minimum and maximum psi you are planning to run with your current setup. i bought the FP Red BB with the intention of running 20 psi for DE events and 25 psi max for certain TT events. it came with 25psi wga and i found that i wasn't able to get the boost down to 20 psi, so i switched to 18 psi wga and still wasn't able to get down to 20 psi. end up having to port the wastegate port on the turbine housing. i was able to get down to 18 psi after porting the wastegate port, but couldn't hold 25 psi up top with the MBC i was using. after switching to EBC, i was able to hold 20 psi flat or 25 psi flat, using the 18psi wga.

the turbo can hit 25 psi at 3700 rpm. the turbo also has anti surge cover. the long block is completely stock. i did a mild track day in march with the new turbo. fells much more responsive than the gtx3076r i had. it was spool so fast that i was getting boost surge at mid throttle in sweeper turns. i put a lighter spring in the bov and that solved the boost surge.

i was going to pull the trigger on the BBK full but then saw FP had the holiday special price on their ball bearing turbo and i couldn't resist

not sure if you saw my post about the boost creep of my turbo before i ported it.

https://www.evolutionm.net/forums/ev...ost-creep.html

 

Very interesting... since we are running very similar turbos I'll take a closer look on this. The BBK-3B is 57 lb/min and FP-Red-BB is 60 lb/min as I recall. I doubt I will ever drop as low as 20 psi on this, as it hits my target whp at ~22 psi which we seemed to be able to hold ok. It did drop a bit of torque from the BBK-Full but requires less boost to get there which is what I wanted. I'm aiming for about 410 whp for TT2. I'll be swapping over to the 93 tune to play around with it on Wednesday. I've been too busy jerking off with the E85 tune. I cannot get over how awesome E85 is. I wish the tracks carried it, such a pain to lug it out there.

To answer your question though, lowest boost should be 22 psi, with highest 32 psi on the E85 tune. The spool on the street at least feels virtually identical to the BBK-Full I had before, although thats comparing E85 to my old pump gas tune so not exactly apples to apples. The transient response is much better. I doubt I'll change actuators for the turbo because of needing the low boost pump gas tune, and the low-boost actuator manages the 32 psi I wanted for the 500+ whp on E85. My tuner said this turbo will do 560+ whp with some more boost and timing, but its totally unnecessary for my intended use.

Are you going to be at Lightning next weekend? Let's meet up and chat then.

 

are you talking about dynojet or mustang dyno hp?

i made 310 whp on mustang dyno at 20 psi.

yeah, i'll be at Lightning next weekend run TT. are you coming out to the track friday evening?

 

Dynapak, 410 whp at 22 psi. Yup, I'll be out there Friday pretty early, dropping the car off, then hanging with my buddy Mike who is running his first DE.

 

Are you using Tephra rom? Do you have knock light? I'm runing pretty low timing to keep the knock down on track. The knock doesn't show up on dyno but 20 minutes on the track is not the same

 

Yup, Tephra v7, I ran a lot more boost (26 psi) for 20-25 min sessions last season on the smaller turbo so I'm not too worried about it. I always splash some 100 octane in the tank when I'm running 93 in high temps anyway.

 

This is an awesome thread. Making me feel very good about what kind of abuse my BBK Full could handle and giving me lots of (expensive) ideas . Thanks for all the updates.

 

Hah, thanks man I really appreciate it! Yeah, the BBK turbos are bad *** for sure. For a stock block I think the Full is absolutely ideal for our car, and for a track car I think the 3B is even better. It holds the torque curve further up in the rev range and hits similar numbers with a bit less boost. It loses a little bit of spool, but the transient is so good if you are carrying the car in 4k+ rpms on a track you get instant power when you need it.

I'll be sure to post how the car does this weekend at my first event on Lightning. At first I was thinking Lightning would be a bit boring, the layout from the top looks meh, but the elevation changes and blind corners look super fun.

 

^ you haven't done lightning yet? Its a nice flowing track and you'll be on the gas most of the time. Bring extra money for gas

 

Hah, yeah it will be my first time, and the track does look cool. Frank said it's a power circuit, so I'll definitely be burning through some fuel. Nice cheap 93 octane.

 

I don't have time for a huge update post, but I ran DE3-4 with NASA NE at Lightning over the weekend, and had a blast. The car was running great, except for a boost creep issue just like honda-guy's that he posted about above. I couldn't get the thing to drop below 25 psi for the life of me. I ended up turning the thing down to wastegate pressure and running a bunch of 100 octane gas just in case it started spiking high. No knock counts with the 100 in there, and it was ~18 psi most of the time, and 25+ at the top of 4th and 5th.

I also had an exhaust manifold bolt work its way out during a session and wiggling around jacked up the bolt. I had to re-tighten the 3 remaining bolts between sessions, but no leaks and the car ran like a top. The Shep Stage 2 gearing is awesome and worked really well for this track. I was carrying 3rd and 4th out to 8200 rpms in a few places and the car took it with a smile.

Motor was great, clutch was great, fuel system, transmission... everything from the build was top notch and gave me tons of confidence. I was running on some old heat cycled NT05s from last season so I could break everything else in, and I killed them off this weekend, but it was a good tire for me to use on a track I had never seen before. It was wet and cold Saturday morning and cars were flying off the track like crazy on Turn 7. I got a couple runs with another LMS driver friend to point me around the track and gave him a session behind the wheel of my car. My 4th session on Saturday I started giving it a little speed, and by my second session on Sunday was in the 1:17s. I didn't get clocked for my last runs, but I think I shaved almost a full second off based on my shift points and peak speeds. I felt really good about that until honda-guy told me he hit 1:14.7 on all-season Falken 912s! Haha, it was cool hanging out with all the Evo guys and for the last session I ran, I got my check ride for my TT license and got approved!

I will be at Thunderbolt doing my first TT event in TT2. I have lots to do to get ready, but thanks so much to everyone who was there and everyone who has supported me so far.

 

Nice. Thai told me about his 1.14 on Saturday evening, and I was pretty shocked myself. LOL. I ran 1.17.5 last year at Global Time Attack. I hope to get into the 16s this coming Friday. I also have a newly rebuilt motor and new suspension. I was on a stock 2.0 motor and Bilstein/GT Worx last season. Hopefully, things go smoothly so I can attempt shaving some time off.

 

Yeah, he's stupid fast. I think I shaved a lot at the end of Sunday once Jordan showed me a couple of places I was losing a bunch of speed (Turn 4 and exiting the 'Bulb). My suspension is still set up real soft and pushy, and I need some real tires, but I felt really great about the course. I had tons of fun the whole weekend, and everyone was cool to hang with. Thai even gave me an extra manifold bolt... ....which I just remembered I forgot to return to him when I couldn't use it. Sorry Thai!

 

NIce meeting you this weekend and congrats on getting signed off for your TT license. Lightning is a fun course, once you figure out a few of the key spots it really comes together. 17s in an evo for your first time there is very respectable.

 

Not sure it will help but I might suggest checking your wastegate to see if any part of it has worked its way loose. After tracking mine I'd found my banjo fittings for the boost lines worked their way loose, and also the internal locking nut for the whole head of the wastegate which allowed boost pressure to leak and the wastegate not to funciton as well. Basically led to a boost creeping problem because my controller just wasn't able to completely actuate the wastegate. Was a pain in the *** taking apart and re-assembling the wastegate (due to the heavy spring) but it had to be done.

As for the turbo bolt loosening up did you have the conical washers on them? I don't know if the Evo's use those (I've never taken the turbo of my Evo IX) but we had those for locking force on the turbine/mani bolts on the 1g/2g DSMs.

Since you ran it without one bolt you may want to take it apart and check your gasket.