BNR S3 or BNR S4

[tmillner]

The s4 cab take you beyond the stock motor if you ever decide to go that route

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[broda]

To be fair if you're planning on getting a built engine you may as well go a step further than an S4 anyway.

[Dennisms3]

Originally Posted by Chef_boi_r_u_dum Still torn between the two. Is it worth the extra few hundred bucks if you aren't going to be running meth or e85? correction: $150. Ignore me. I'll retreat back to the corner.

If you want to make more power on pump gas then yeah, its worth the extra 150$. Plus so much more room for power later down the line.

[Dennisms3]

Here is a comparison of my e30 mix k04 tune vs my bnr on 91 octane tune. I did pull timing in the mid range after this k04 log and on a dynojet I put down 319whp 335wtrq with the K04 on e30 mix. I haven't dynoed the bnr yet.

[BuddySpeed3]

Originally Posted by broda To be fair if you're planning on getting a built engine you may as well go a step further than an S4 anyway.

The thing I like about the BNR turbo kits is that they are fairly priced and are very close to a direct bolt on, and offer the kind of performance I'm looking for. I'm currently on the stock block, so I'm mainly looking for more power up at higher rpm's which the k04 just can't provide, but I also don't want to sacrifice responsiveness too much either

Originally Posted by Dennisms3 Here is a comparison of my e30 mix k04 tune vs my bnr on 91 octane tune. I did pull timing in the mid range after this k04 log and on a dynojet I put down 319whp 335wtrq with the K04 on e30 mix. I haven't dynoed the bnr yet.

It's clear to see that the BNR flows a lot more air at higher rpm and makes more power even on 91 octane, exactly what a stock blocker needs lol

Originally Posted by Rambo Been lurking for awhile, I have no plan on building the block so I think the s3 will fit my needs. Don't need anymore than 350 whp as I find hooking even with PSS is difficult and no plan on meth either. Also in Canada e85 is almost impossible to find.

That's why I run a gallon of methanol in the gas tank. Works wonders with 94 octane. I'm able to get away with 17 degrees of timing, and 18.5 psi at 6k rpm on the K04 with no knock. On top of that I run WMI with a small nozzle to keep BAT's cool and power consistent. Just need an S4 to take full advantage of my setup. I also don't plan on building the block any time soon, but if I do the S4 should be plenty.

[tmillner]

Where do you get your methanol? Consumer places or online?

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[BuddySpeed3]

Originally Posted by dale_gribble Based on the dynos and logs I've seen, on shipped WG preload, the S4 is spooled by ~3500-3600. Spools like a mid turbo, flows like a bigger one.

So to get more boost with less wgdc, would it be necessary to adjust the wastegate actuator to a higher threshold?

Would it be possible to over boost at lower rpm's if the wastegate actuator is adjusted too high on the s3 or s4? I know the K04 does this all the time. I had to zero out wgdc until 3000 rpm to keep boost in check at lower rpm's.

I read somewhere that this was happening with the BNR's and then they started shipping them with a lower wastegate setting to open around 12 psi.

[iamareios]

Just picked up an S4 for $900! Only had 1500miles clocked on her.

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[Chef_boi_r_u_dum]

S3 for me.

My decision was made based on not wanting to max the stock block/internals, not wanting to use aux fueling/meth and not wanting to buy a new intake.

[Dennisms3]

Originally Posted by Chef_boi_r_u_dum S3 for me. My decision was made based on not wanting to max the stock block/internals, not wanting to use aux fueling/meth and not wanting to buy a new intake.

Same, but i got a bigger intake. Lol

[BuddySpeed3]

Originally Posted by tmillner Where do you get your methanol? Consumer places or online? Sent from my SM-N920P using Tapatalk

Methyl Hydrate or Air Brake Anti freeze, I get it from Canadian Tire, they sell 1 gallon for 10 bucks. I also heard Home Depot may carry the same thing, but never checked.

[tmillner]

I'm a diesel mechanic i got that air brake stuff everywhere. Never really looked at it. Knew it was alcohol, didn't but 2 and 2 together.
Thanks for the info

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[specvspeedfreak]

Gotta admit.... even only being on my 2nd revision 91 tune...the S4 feels great... so far max boost is a hair under 19 psi and 11 degrees of timing (@ 6.4k).. Can't wait till 91 tune is complete so I can get started with the meth tune.

[BuddySpeed3]

Originally Posted by specvspeedfreak Gotta admit.... even only being on my 2nd revision 91 tune...the S4 feels great... so far max boost is a hair under 19 psi and 11 degrees of timing (@ 6.4k).. Can't wait till 91 tune is complete so I can get started with the meth tune.

My gosh that thing is gonna rip! It's crazy how much power its making on 91 alone. It's just feeding the engine way more efficiently.

[specvspeedfreak]

Originally Posted by BuddySpeed3 My gosh that thing is gonna rip! It's crazy how much power its making on 91 alone. It's just feeding the engine way more efficiently.

Well I didn't mention anything about the power it's making lol.. it should be around 320whp right now (based on butt dyno) ... but it's how it makes and feels with that power that is impressive.

[impossible]

Why is this thread even still going? All this theory talk, when you can just buy it and find out for yourself. Makes more power on pump gas, can be maxed out on a built motor and aggressive tune with sufficient fuel and has better boost control than even the v2 BNR S3. If you dislike the turbo for whatever reasons It won't be the end of your car, I ran the GTX28676R and will now be going BNR S4 this go around before trying out a Precision turbo on a vband setup. JUST DO IT.

[MS3Shadow]

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[ryguy 3]

Originally Posted by tmillner Does anyone know the gains from a 3 inch intake over cs "stg2"? My thought was I'd rather re-buy an intake then a turbo if I want bigger Sent from my SM-N920P using Tapatalk

I gained about 20 g/s when I went from the corksport stage 2 to the jbr Tru 3".

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[voodoo2crue]

Got the S4 in yesterday, here's some BNR porn

[iamareios]

This was from last weekend Currently tuning with Freektune

[Chef_boi_r_u_dum]

Mine was a pain. Took me all of sunday to install. I'm also tuning with Freektune right now.

Yay for bigger turbos!

[iamareios]

Originally Posted by Chef_boi_r_u_dum Mine was a pain. Took me all of sunday to install. I'm also tuning with Freektune right now. Yay for bigger turbos!

I picked mine up used so it didn't come with any exhaust studs or nuts. That was my only problem. Extracting the old rusted ones off my turbo and reusing them. PITA! Otherwise i did it without having to remove the exhaust manifold.

[Chef_boi_r_u_dum]

Maybe that's why. I did it with the manifold and stock dp in place.

[specvspeedfreak]

Been driving on an almost complete 91 tune S4 for sometime now and can say hands down the S4 is superior to the S3... I remember when the S3 was claimed as the best turbo for daily driving and stock block <<< that can't be said anymore.. The off/on boost delivery is perfect with smoother and stronger power... The best part? the power band is widened up to perfection... It has a strong hit (maybe not as fast as the s3) but the continues chugging of the turbo all the way to redline just has a different, kick ass feel now... inherents a good side effect; the feel of taller gearing. WIN

Even though I really want to start my meth tune... it's at a real good place with just 91 so no big deal.

[impossible]

Originally Posted by MS3Shadow sent from my Nexus 6P

@OP: Don't let your dreams be dreams.

[tmillner]

Originally Posted by impossible @OP: Don't let your dreams be dreams.

Side note, wtf is he doing? Transformers rattle his brain?

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[impossible]

lmao idk hollywood brings out the weird in people but I still love Shia Labeouf on screen, dude has come a LONG WAY from Even Stevens lol

[MS3Shadow]

Originally Posted by tmillner Side note, wtf is he doing? Transformers rattle his brain? Sent from my SM-N920P using Tapatalk

He's trying to motivate you. Don't let your memes be dreams.

sent from my Nexus 6P

[tmillner]

Originally Posted by MS3Shadow He's trying to motivate you. Don't let your memes be dreams. sent from my Nexus 6P

Was the rhyme by design?

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[MS3Shadow]

Originally Posted by tmillner Was the rhyme by design? Sent from my SM-N920P using Tapatalk

Yeah, he made it that way and even doing it with a green screen so people can do what they want with it.

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[voodoo2crue]

Installed the S4 this weekend and tune is still in progress. Here's where I'm at versus the k04 in similar temps(82F). All mods are the same other than the turbo and intake. I always stopped my k04 pulls well short of redline as the power always would fall off to under 280ish with the DJ factor, now it's balls to the wall till redline.

[specvspeedfreak]

Originally Posted by voodoo2crue Installed the S4 this weekend and tune is still in progress. Here's where I'm at versus the k04 in similar temps(82F). All mods are the same other than the turbo and intake. I always stopped my k04 pulls well short of redline as the power always would fall off to under 280ish with the DJ factor, now it's balls to the wall till redline.

damn almost 24 psi? Who is tuning it?
Mine will be targeting 21 psi on the next (final) revision.

[tmillner]

Running e33?

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[voodoo2crue]

Originally Posted by specvspeedfreak damn almost 24 psi? Who is tuning it? Mine will be targeting 21 psi on the next (final) revision.

Self tuning targeting 23.5 at RL Voodoo's BNR S4 Tune in progress

Originally Posted by tmillner Running e33? Sent from my SM-N920P using Tapatalk

On E25 atm

[tmillner]

I wish i was smart enough to self tune. S4 keeps pulling doesnt it

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[voodoo2crue]

Originally Posted by specvspeedfreak damn almost 24 psi? Who is tuning it? Mine will be targeting 21 psi on the next (final) revision.

Pump gas?

Originally Posted by tmillner I wish i was smart enough to self tune. S4 keeps pulling doesnt it Sent from my SM-N920P using Tapatalk

Yes it does, it's like driving a different car.

[specvspeedfreak]

Originally Posted by voodoo2crue Pump gas?

For now, yes.. Will be moving to meth tune next.

Should've asked if you were running E... Makes sense; but still a bit high maybe

[g00s3y]

I've decided to go s4. My car has been down because of the 1 of the POS oem injector seals blowing, and CS was out of their beauties until the end of April. While all this has happened I decided i'll be taking off my s3, and will be getting the s4. And the seals should be here tomorrow.

So yeah, I'll be putting an s3 up for sale this week/weekend sometime. Just have to stop being lazy an actually remove it.

And go green again I see.

[MD1032]

Why would you upgrade from an S3 to a CS anyway man? That's a sidegrade, not an upgrade.

Hope the S4 works for you. I'm probably going the opposite direction (smaller) after having the S3 honestly but I can understand the appeal of big turbo power especially for how cheap the S4 is. It's an amazing value.

[ryguy 3]

Originally Posted by MD1032 Why would you upgrade from an S3 to a CS anyway man? That's a sidegrade, not an upgrade. Hope the S4 works for you. I'm probably going the opposite direction (smaller) after having the S3 honestly but I can understand the appeal of big turbo power especially for how cheap the S4 is. It's an amazing value.

You didn't read did you? He's talking about CS injector seals and going from the S3 - S4.

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