I actually covered that in the 2nd part of this video series, just put a little more simply comparing one dyno sheet with vvt compared to another with no vvt

💪🏻💪🏻

The dyno sheet I show right at the beginning is a Borg Warner EFR 7163 on a STI. I think EFR are the superior turbos on the market for when it comes to faster spool. I was looking into the efr 7670 myself for a future setup.

No problem brotha

Yup that first dyno sheet I show is of and ej

Very interesting!

yep you want advanced ignition timing for NA but the more timing you can pull out mid-high load the more response you see from the turbo and the faster you get into boost and making actual HP! I can see 4psi at 60mph 1800rpm from a 4.0L with a GTX3582r Gen2

you lower timing at spool not because of spool up. adv would actually give you more. you lower it to reduce knock because engines dont like being loaded at lower rpm. this saves your engine from detonation. any tuner worth a pay check for it knows this. the best and only way to really tune for spool is with a turbo speed sensor and a pressure sensor between the head and turbo. you want the psi at that sensor to match your target psi at the same time the turbo speed is in its efficient rating based on the compression map and your engine. without those 2 sensors you are just guessing.

Jesus why don’t you just say retarded ignition. 🙄 drama queen

retarding timing does put more heat in the exhaust but kills power i prefer to have the right timing and just get the turbo that spools

Yeah someone else’s video already covered that topic didn’t want to steal his thunder. But yes keeping heat and energy in the turbo help.

I’ve looked into those as well but have never experimented with one

I agree 100 percent there’s more maintenance that comes with it and more stress I have personally experienced it.

Never heard that before I’ll look into it more

I'm board n got nothing better to do... just love theory and engineering type stuff... its fun

yeah there's come confusion about max torque on the rev range ( which depends simply on turbo size) and responsiveness ( gas on a pedal to getting some thrust

Thanks!

Keep me updated! Dm me on ig after it gets tuned and stuff

@@Bang4BuckRacing Definitely man, will keep it simple for the time being BPU and that sort.

I definitely see your point but in reality how many people are actually get and use a 4 port boost controller? Even a lot of tuners are just scared of what they don’t know and won’t learn how to tune on one to get these types of results . So majority of people will still just use a 3 port, and with out that 4th port holding the gate shut the exhaust gases on its own will push open the gate. And it seems from what i have looked into with a 3 port alot of tuners just always the gate being supplied with air through the entire band. Even on mine with the 4 port was never fully closed down low but was shut like 75 percent. If you did that exact same thing with a 60 mm it would still lose velocity due to volume size. But yes in the theory that it’s fully slammed shut I’d say you’d be right. I believe a lot of people setup up EWG setups wrong and lose to much velocity when they don’t have to and if I was a decent size KZfaqr I would build another project to test my theory on but I’m not there yet lol

@@Bang4BuckRacing I don't want you to think I'm trying to debunk you. I was genuinely asking. I can see how having too big of a wastegate would dump your boost as well. I wasn't aware that the 3 port wasn't able to hold the wastegate closed well enough. But it would make sense that they developed the 4 port to deal with that. There are electronic external wastegates now as well. Way more expensive, but eliminates the need for vacuum and boost lines to actuate the valve. Pretty cool stuff. I appreciate you getting back to my question though. A lot of good information in the video and in these comments.

All good my man we’re all hear to learn and grow

Yes lol

You kinda can lol, but exhaust gases can still forced it open and most 3 port setups help force it open all the time as well, so a 4 port really seals it off.

Then why is the Honda motor Red Bull F1 race car always winning?

@@weduhpeople8504 I don't know enough about their program. But, Honda is pulling out and Redbull is using the same setup after negotiating with Honda for it. I believe there is some secret cheating going on, these manufactures are not stupid. And, of course RedBull has extremely deep pockets.

Here is a post on forum for a while back that I referenced. The IC piping plays a little bit more of a factor than the intercooler it’s self. “you want to run the smallest possible without going over a certain air speed. 304 MPH or 0.4 mach is the point at which airflow meets increased resistance (drag) and flow losses are experienced. Depending on which turbo your running and what hp your looking for will determine piping size. to small is a restriction and to larger is laggy. generally for the average setup 2.25-2.5" is what works here is info i found on mach speeds of certain size piping relavent to cfm flow 2" piping 1.57 x 2 = 3.14 sq in 300 cfm = 156 mph = 0.20 mach 400 cfm = 208 mph = 0.27 mach 500 cfm = 261 mph = 0.34 mach 585 cfm max = 304 mph = 0.40 mach 2.25" piping 3.9740625 sq in = 1.98703125 x 2 300 cfm = 123 mph = 0.16 mach 400 cfm = 164 mph = 0.21 mach 500 cfm = 205 mph = 0.26 mach 600 cfm = 247 mph = 0.32 mach 700 cfm = 288 mph = 0.37 mach 740 cfm max = 304 mph = 0.40 mach 2.5" piping 4.90625 sq in = 2.453125 x 2 300 cfm = 100 mph = 0.13 mach 400 cfm = 133 mph = 0.17 mach 500 cfm = 166 mph = 0.21 mach 600 cfm = 200 mph = 0.26 mach 700 cfm = 233 mph = 0.30 mach 800 cfm = 266 mph = 0.34 mach 900 cfm = 300 mph = 0.39 mach 913 cfm max = 304 mph = 0.40 mach 2.75" piping 5.9365625 sq in = 2.96828125 x 2 300 cfm = 82 mph = 0.10 mach 400 cfm = 110 mph = 0.14 mach 500 cfm = 137 mph = 0.17 mach 600 cfm = 165 mph = 0.21 mach 700 cfm = 192 mph = 0.25 mach 800 cfm = 220 mph = 0.28 mach 900 cfm = 248 mph = 0.32 mach 1000 cfm = 275 mph = 0.36 mach 1100 cfm max = 303 mph = 0.40 mach 3.0" piping 7.065 sq in = 3.5325 x 2 300 cfm = 69 mph = 0.09 mach 400 cfm = 92 mph = 0.12 mach 500 cfm = 115 mph = 0.15 mach 600 cfm = 138 mph = 0.18 mach 700 cfm = 162 mph = 0.21 mach 800 cfm = 185 mph = 0.24 mach 900 cfm = 208 mph = 0.27 mach 1000 cfm = 231 mph = 0.30 mach 1100 cfm = 254 cfm = 0.33 mach 1200 cfm = 277 mph = 0.36 mach 1300 cfm max= 301 mph = 0.39 mach”

Well, it is going to have some effect for sure but it's not that critical as most of us think. The difference in the air mass with different volumes in so small so an average size turbo can move it with almost no difference comparing to smaller intercooler and pipes. What really affects the spool is the TB size...

To me every inch counts even if it’s 100 rpm difference. It’s the whole equation to me that produces the results.

True. Everything counts especially if you do the whole lot...

You sound a little mixed up on how the system works brother I suggest doing a little bit of hw

@@Bang4BuckRacing I’m still trying to figure it out, the waste gate duty cycle stays at 50 while stopped then drops to 0 while hard driving. So would that mean the solenoid would close, increasing the turbo speed while under load?

Put more preload on the wastegate.

​@@Viciouslordcompression or rebound 😂

Exaclty 😤

It should, in a straight line. Without boost on the parking lot autocross, it plows like a truck

It’s a twin scroll Borgwarner efr 7163 on a 2.5L sti and all things I discuss on this video are factored into his setup

🤣 I actually made that on a stock 4g63 block for a year now I’m going built 2.2L

Your ic piping

Slamming the wg shut at lower Rpms to where even exhaust gases cant open the wg like on a 3 port. When it slammed shut the turbo builds more energy sooner and the only place to escape is the down pipe forcing it to spool faster.

@@Bang4BuckRacing What if you T off a 3 port and run lines to the top and bottom?

@@Jamxknife I did that on my Subaru and saw no real gains it doesn’t provide ample pressue imo like a 4 port does with a extra dedicated port to slam the gate shut

@@Bang4BuckRacing Ok! I’ll give my 4 port a shot. I had one for 2 years and never installed it.

​@Bang4BuckRacing so even with the stock internal wastegate it's not fully closed before you hit targeted boost? Just curious cause I'm doing all these things to my evo to increase spool for autocross

oem turbine is the best option

I have the one with a swivel at the end and very tight tolerance machine fit. Yes a tiny bit leaks by but isn’t enough to lose a lot. The ones with the rod coming straight out and no swivel will lose more as well.

Those Turbosmarts are crap but you can seal that rod with right size valve seal, mine came from some Opel. It limits travel a little bit. Better buy those chinese copies for less money, they are as good as Turbosmart.

That o have no idea but if that turbo is massive that’s Exactly opposite of what I talk about in this video lol

@@Bang4BuckRacing Oh it's massive, haha.

🤣 I got them after making this video. Will have them on for next one

That’s kinda falls under the size of the turbo but yeah I didn’t go into detail on that. Because even if you get a turbo with a bigger a/r size but use the other factors it will still spool quicker.

Ya I caught that mistake awhile back

I found out how to add a manual caption to correct that

Borg Warner efr 7163 twin scroll IWG. I believe the EFR series are the superior turbos for faster spool.

@@Bang4BuckRacing damn, that the exact same turbo i was looking into, is his motor stroked or stock displacement?!

@@TheSaftouch his is a built block 2.5 sti so still stock displacement. And I believe 8.5:1 CR

In a straight line sure some corners on tracks and for autox especially you get lower in the Rpms. But you knew that 😀

Dyno sheet! 🤣

Dat holy grail tho 🤣

Disagree I religiously look up Dyno sheets compared with build sheets these all tend to be contributing factors to faster spool.

Yeah I mis spoke if you look at the captions at the point I corrected it

my man

I actually caught that myself a while back that I slipped up there maybe input the text in KZfaq editor there, but regardless of referencing a wrong number I still stand by the factors in the video. I have seen another 8 dyno sheets with spool before 4000 rpm and discussed with the owners all extremely similar to what I recommend in this video.

You’re welcome to dm me on ig with other data and dyno sheets spooling equally as fast as what I have shown in this video. Just cause you saw I said IWG spools faster I’m sure. But I’ll wait

Brother did you see any drag racing in this video? I do autox and time attack on tracks.. that’s why I prioritize boost response so I can get out of the corner faster.

Ratio