| 3 Turbos | All Else Being Equal | Testing Thread | DYNO SHEET COMPARISON |

[highboostingm3]

| 3 Turbos | All Else Being Equal | Testing Thread |

DYNO SHEETS


Same TRM 60lb Base Tune Chip
Same Dyno
Same Car
Same Engine
Same Fuel System
Same Turbo System (minus turbo)
Same 91 octane fuel
Same 18psi boost
Same Widebody
Same Size Tires
Same 4th Gear
Same Tranny
Same LSD


Head:
• M52 head
• Heavy port and polish
• Resurface Head
• Complete valve job (pressure test before and after)
• stock m52 valves
• Ferrea Ti retainers
• Ferrea keepers
• Ferrea dual valve springs
• s52 Elgin regrind cams
• 10mm ARP2000 head studs
• Pressure test
• New valve seats
• New complete gasket kit

Engine Block Mods
• M52 block
• s52 crank
• 135mm Pauter forged rods
• 8.5:1 CP forged pistons 85mm bore
• Balanced engine assembly
• Polish crankshaft journals-main and rod
• MLS head gasket 0.070
• Copper O-ringed
• Total seal rings
• ARP main studs
• Line bore-deck-bore
• ARP rod bolts
• Resurface block
• Complete engine re-seal & paint
• New BMW pulleys and small parts

Brand New BMW Replaced Engine Parts:
• Valve guides
• Main bearing set
• Rod bearing set
• Water pump
• Chain tension
• Timing chain
• m20 Thermostat
• Hydraulic valve lifters
• Timing chain rail
• Oil pump
• Chain sprocket
• Top-end reseal kit

Fuel Setup:
• 1200hp fuel rail
• twin in-tank Walbro 255lp pumps
• Welden FPR
• –10 feed to rail
• –8 splitting to twin –4 just under driver side tank with one line to siphon and the other to the tank.
• all lines are steel braided with AN fittings
• 60lb Siemens High Empedence Injectors

Turbo system:
• 3 different turbos tested are noted below
• steel braided oil feed and return lines with AN fittings
• hard lines for water cooling
• 3” charge piping to and from intercooler all bead rolled with t-bolt clamps on couplers
• twin Spearco 600hp cores welded together
• Synapse BOV
• stock throttle body
• m50 intake manifold
• tubular manifold with twin 3-1 Burns collectors, then the twin runners each have a wastegate dump tube before the turbine flange which go down to a 2-1 collector (hot coated)
• 60mm Turbonetics NewGen wastegate
• 3” downpipe hot coated 3" charge piping
• 3" exhaust
• 28" Magnaflow Muffler
• 16" Magnaflow Muffler
• 3" turn down


Drivetrain & Drivetrain Support:
• Vorshlag Driver side motor mount
• Solid passenger side motor mount
• ZF tranny 5-speed
• UUC red top tranny mounts
• Southbend Stage 5+ CLutch
• Dual Mass Flywheel
• Driveshaft Shop 1000hp DS
• AA diff support bracket
• 3.23 LSD
• Driveshaft Shop 1000hp half shafts

Tires:
• BFG 315/30/18 Drag Radials

Gauges:
• Defi BF Boost gauge
• AEM AFR Wideband Gauge
• Defi Link Display Unit With Snsors for:
- EGT
- Coolant
- Oil Pressure
- Oil Temp
• MAF Emulator 2 Datalogger
• Ostrich Emulator (direct USB to 413 DME for tune upload)




Let the dyno sheets do the talking...






TURBO #1

T4 open .68 a/r 6776 DBB non-billet Turbo

Cutout Open







TURBO #2

T4 divided 1.00 a/r HTA 3794R DBB billet Turbo

Cutout Open



Cutout Closed








TURBO #3

T4 open .58 a/r 6262 DBB billet Turbo


Cutout Open




Cutout Closed






COMPARISONS


T4 divided 1.00 a/r HTA 3794R DBB billet Turbo (SLOWER SPOOLING)

-VS-

T4 open .58 a/r 6262 DBB billet Turbo


Cutout Open HP & TQ





Cutout Closed HP & TQ




Cutout Open TQ




Cutout Open HP




Cutout Closed TQ





Cutout Closed HP






COMPARISONS


T4 divided 1.00 a/r HTA 3794R DBB billet Turbo(SLOWER SPOOLING)

-VS-

T4 open .68 a/r 6776 DBB non-billet Turbo


Cutout Open HP & TQ




Cutout Open TQ




Cutout Open HP







COMPARISONS


T4 open .68 a/r 6776 DBB non-billet Turbo(SLOWER SPOOLING)

-VS-

T4 open .58 a/r 6262 DBB billet Turbo



Cutout Open HP & TQ





Cutout Open TQ





Cutout Open HP

[RobertFontaine]

Stellar! With so many people throwing around numbers a baseline like this is priceless.

[asuj158]

this is one of the greatest tests ive EVER seen done. great stuff.

[Keith1054]

Very valuable info in here!
I will probably never have any of these turbos, but just having solid data to reference is always useful
Thanks Cam!

[Sniz]

Well that's just awesome! So are u sticking w the 6262?

[Butters Stoch]

The time and the money sepent, the presentation of data
IMPRESSIVE

[pbonsalb]

I'd keep the 6262, but run meth to allow the higher boost and/or increased timing that should wake it up a little more.

[LagWagon]

Dat 6262 spool

[GotM3lk]

T4 open 6262 .58 a/r and free flowing exhaust really is the hot ticket for a street whore!

[highboostingm3]

Thanks everyone. I am still waiting on the raw video as I always have to work and wasn't at the dynos. I need to go get it with a thumb drive in hand. There is video of the 6262 and I think possibly video of one of the other turbos too but we will see.

The 6262 isn't going anywhere. The only thing I might even think about changing is the turbine housing to a .68 to see what happens there but the curve is so nice right now I'll just keep her there for a bit.

Meth maybe. We will see.

[ZimDoc]

Wow Cam. Thanks for the epic thread. Glad to see someone spent the time and did this!

[someguy2800]

very nice. Id take that 6776 all day long

[1SLWM3]

Such a beneficial thread for the community. Thanks Cam!

[MikeE36]

Loving it Cam! Great info and testing, thanks for posting this. The 6262 definitely is the best street turbo of the 3 choices.

Let's look at some specific "street driving" data points here.

3000 RPM:

6776: 180 ft-lb
3794R: 170 ft-lb
6262: 210 ft-lb

6262 wins by 30 ft-lb

3500 RPM:

6776: 230 ft-lb
3794: 220 ft-lb
6262: 285 ft-lb

6262 wins by 55 ft-lb

4000 RPM:

6776: 310 ft-lb
3794: 280 ft-lb
6262: 405 ft-lb

6262 wins by 95 ft-lb

4500 RPM:

6776: 420 ft-lb
3794: 380 ft-lb
6262: 400 ft-lb

6776 wins by 20 ft-lb

For most street scenarios unless you're doing all-out-max-effort pulls, the 6262 wins. Unless you rev it to 4500-5000+ RPM at WOT, the 6262 will always accelerate faster from light to light, etc and really put those DR's to good use. Up top, sure the bigger turbos have a slight advantage, but for a street car... I'd be most concerned with 2000-4000 RPM or 2000-5000 RPM, not 5000-7200 RPM.

Good choice!

Looks like the 3794 was the slowest spooling of the bunch, but it is also a very large turbo with a large exhaust housing. I think with a smaller housing it might've done better, but by the numbers it is substantially larger and thus lazier. A true TS manifold might've woken it up a bit, but that will be a test for someone else at a later date.

Do you guys have E85 in California? That's what the 6262 needs.... It will wake up a lot more above 20 psi if you switch to a different exhaust housing. A .82 A/R would still spool really well (much better than the other turbos) but really make some power at 20-30 psi. Get TRM or Jordan or whoever is tuning it to do some ID1000s or 1200s on E85 I know you mentioned you didn't like the race gas prices. ($20/gal is ridiculous. Maybe that's a california thing but if you buy a drum here you can get it for $10-12/gal for C16 or MS109)

-Mike

[raoke]

Group buy on cut-outs?

[wazzu70]

Cam, awesome tests!

Would be interested to see how the larger turbine housing on the 6262 changes things. Maybe someone has one they can send you.

Maybe also see if you can get a 3586 to throw in the mix. Im sure someone would be willing to lend you one!

[Z3speed4me]

Great comparison!

Love to see the 6466 instead of the 67, but that's obviously not happening. Hta 35 would also be interesting.

[highboostingm3]

Thanks guys. It's been over 2 years since the first dyno so this has been a long time in the making. If I make any changes in the future I will simply add to the first post with new dyno comparisons as I will keep using the same dyno.

Loving it Cam! Great info and testing, thanks for posting this. The 6262 definitely is the best street turbo of the 3 choices....

-Mike

Wow! Thank you for the detailed analogy as we all know you are so good at.

6262
The difference not only shows per the dyno plots but in transient boost response as well. This is a big deal to me because as pretty as my medusafold is, it is NOT ideal for the street. However, with the 6262 I get the hit pretty quickly in comparison to the 6776 and I love the feeling.

6776
It felt nice once up top but for me it just took a tad too long to get there. Especially on the street zipping around. On the freeway it was okay but I don't drive much freeway.

3794
It was very disappointing to me in the peak power department. The slow spooling is disappointing for certain yet I attribute a lot of that to me having an open manifold and not taking advantage of twin scroll goodness. Plus the 1.00a/r factors in. Still though...power per psi I thought this turbo would beat the 6776 and it fell way short.

e85 & c16
Unfortunately e85 is very hard to come by otherwise I'd go solely that route and boost big every single day. It is a shame since California is supposed to be the greenest state and we don't really have the corn juice available yet in some of the most polluted who gives a shat about the environment states they have corn juice everywhere. I don't know why the c16 is so expensive. Maybe the state just doesn't want it sold anymore as it is soley for racing and maybe the Liberals in California just want to end all that. Not sure. It used to be $10-$12 here. There is a pump I used to fill up my Supra and my M3 (when she had Tec 3R) which sells 111 F&L. Some day when I am near there buying silver I will check it out to see the cost. If it is still under $10 then that would be a possibility when I want to go have some fun. Back in the day it was $5.50. Those were the good ole days.

Group buy on cut-outs?

lol I love having a cut-out.

Cam, awesome tests!

Would be interested to see how the larger turbine housing on the 6262 changes things. Maybe someone has one they can send you.

Maybe also see if you can get a 3586 to throw in the mix. Im sure someone would be willing to lend you one!

Thanks!

Yeah I am already itching to try the .68. It might be the perfect combo. I could gain some peak power (maybe even close to the 6776) and still have close to 400wtq at 4000rpm so the spool is still nice and quick on the low end hit.

Luckily these Precisions can swap easily so I might be able to come across someone who I can borrow it from. Either that or the ATP T4 open .82 which is supposed to be pretty sweet.

The GTR Garret serious are much shorter than the Precision. Therefore, I woould have to change the charge piping and possibly downpipe a little which isn't worth it. Besides...that is $$$$ and I already wasted a good amount on the HTA 3794. I need to see if I can sell it to an EVO guy to recoupe some of that loss.

Great comparison!

Love to see the 6466 instead of the 67, but that's obviously not happening. Hta 35 would also be interesting.

6466
I think should be an awesome turbo. For most guys with short runner manifolds it might be THEE IDEAL STREET TURBO.

I will be glad to do a comparison if someone will let me borrow their 6466 as long as it has V-band 3" exit on turbine and "S" compressor housing.

Anyone? Beuller?...............

Oh...I know someone who just bought one of these....muhahahahahahahaha!

[Colby Colbs]

This is a big deal to me because as pretty as my medusafold it, it is NOT ideal for the street.

Why do you say that it is NOT ideal for the street? Wanna trade for a equal length top mount? LOL Its just sitting on the shelf...

But seriously, I'd like to know why you feel so strongly about this.

[Fender13Bender]

I'm still very interested in that 37 Cam. I would be able to test it on a twin scroll manifold.

[highboostingm3]

Why do you say that it is NOT ideal for the street? Wanna trade for a equal length top mount? LOL Its just sitting on the shelf...

But seriously, I'd like to know why you feel so strongly about this.

I like the flow, I love the boost control, I love the sound. I guess once I stick a .68 on there and see if it drops off a bunch in the low-end or not I will know. I keep seeing these Dynojet sheets from CES with like 520wtq at 4000rpm I mean come on. That is sick and must be attributed to the Steedspeed manifold I would think. Give me your take on why they have so much more area under the curve.

I'm still very interested in that 37 Cam. I would be able to test it on a twin scroll manifold.

I need to liquidate it, not lend it out. With the right TS manifold and more boost it could be insane for all I know. If you want to purchase please PM me. It has a 90 degree elbow TIG welded onto the compressor housing which in your case might be an added bonus as most of our setups need that.

[good & tight]

6466
I think should be an awesome turbo. For most guys with short runner manifolds it might be THEE IDEAL STREET TURBO.

I will be glad to do a comparison if someone will let me borrow their 6466 as long as it has V-band 3" exit on turbine and "S" compressor housing.

Anyone? Beuller?...............

Oh...I know someone who just bought one of these....muhahahahahahahaha!

CAM that is some great turbo comparison info. I imagine quicker spool up would be achieved with a shorter runner manifold. You rock...!!!!!!

[Z3speed4me]

I'd send out my 6466 but its going on my own car very very soon once things start to get back to normal over here...

[1998328Is]

Id love to see what a hta3586r t4 divided with .84 hot side would do on that

[GotM3lk]

CAM that is some great turbo comparison info. I imagine quicker spool up would be achieved with a shorter runner manifold. You rock...!!!!!!

That is called a "hint" Cam.