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New DR750 owner-- guess the dyno!

85K views 536 replies 80 participants last post by  kywhitelightning 
#1 · (Edited)
Okay guys the day is almost here! For those of you who may not know- I bought a 1992 VR4 in Vegas and I am now only a day and a half from being able to FINALLY drive it. I have been waiting patiently for my baby and in the process of waiting I have spoiled her with goodies.

I will only have my car for a good week before turning it into the masterminds that are FSR Motorsports and allow them to create my dream vehicle. With that in mind, and running off of Benson's dyno post, I am wondering what you guys think the final WHP will be.

P.S. there will be a prize for the person who is closest to the end WHP.

The mods:

3.1l engine
DR750 turbos w/ wastegate actuators
3S Pro EFI 128 ECU (tuned by the amazing trio at FSR Motorsports)
IBoost Controller w/ boost control solenoids
E85 with flex fuel
Walbro 400lph
FIC 1100cc High Z injectors
HKS DLI
NGK spark plugs/wires
Southbend Stage 3 clutch
Intake
3 in DP/exhaust
HKS BOV
92.5MM Weisco pistons
Brian Crower H Beam Rods
Forged Crank

What do you guys think?

Enjoy.
 
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#170 ·
High oil pressure causes additional drag on the engine via the oil pump somewhat on the rotating assembly. Running lower viscosity oil will reduce oil pressure and alleviate some of that drag. If you didn't change viscosity you may be experiencing the placebo effect. Oil has 2 functions in the engine lubricating AND cooling. Since there is no free lunch in the performance world you need to pick your battles when it comes to oil selection. On a street car, oil that is optimized for power may not cool as well or even worse break down during extended drive cycles. OEM's have been reducing the recommended viscocity rating for their cars for a little while now in pursuit of better fuel economy.

As for the turbos spooling quicker, I sure hope they haven't been oil starved due to the dented pan. That may slow them down and should now be cause for concern as should the rest of the engine. Notice anything metallic looking in the oil when you drained it out to fix the dent?

It is beyond me how this car has been running with a known dented oil pan for this long and pushed on the dyno to try to make some power.

Jeff
 
#172 · (Edited)
Update! Unfortunately my old engine gave out and my DR750 turbos needed to be rebuilt. My 3.1l fully forged engine was shiped to Benson where he was able to get the engine up and running again. The interesting thing is that FSR said that the engine couldn't turn (the reason they didn't swap it in) yet it only took Benson all but a day to get the engine to turn... but that's besides the point.

I thank FSR for taking on the project and installing the PROefi128 but after waiting 11 months for my car there were problems with it immediately. The moment I drove the car out of the lot and made it to the first red light the car stalled on me. The RPMS would always drop to 0 whenever I pressed on the break. I had some near death experiences just on the ride back-- the car stalling in the middle of the highway was not a fun time-- in one case, taking the exit with a wide turn my car stalled and I needed to react ASAP to turn the car back on before slamming into a wall.

Other than near-death experiences, I ABSOLUTELY loved the feel of the DR750s. Each friend that I let ride in the car was taken aback by its power-- including my friend who owns a new Porsche 911. This was only at 520awhp on a dying engine spitting out shrapnel too! I can only imagine what it will feel like with 100 more whp.

Continuing with the story, I purchased the advanced ECU-- the proefi128-- with the expectation of getting the features that I paid for. I bought a $1300 Can Display (including install) which monitors everything ranging from oil pressure to boost to ethanol % to horsepower to fuel pressure.... you name it. Well... the ONLY feature that worked was the Tachometer... and that was it. I wasn't able to view my oil pressure, check my boost, fuel pressure, ethanol content-- nothing. I bought the display for the sole reason to see my boost, see the ethanol %, check my oil pressure, and as a cool featuure to gauge my horsepower... yet none of the above worked.

So, I sent my car to a local specialist in 3000gts where my engine swap is happening while awaiting the turbos to be rebuilt. During that time I went through a phase in which I was entertaining the idea of different builds. 700whp, 800whp, single turbo with gt42, twin GTX3076s, DR1200, the list went on... I had the sick addiction of possibly wanting more and more horsepower for a track beast... but at the sacrifice of having a perfect street car. I unfortunately felt like an annoyance to my fellow 3k peers because I was bouncing around ideas and switching up my build plans like a person on mood swiings. Ultimately, I decided to stay true to what I feel is the ULTIMATE street build and the BEST setup for my personal goals: the DR750s!

Matt has been of great help and his turbos show just how important and excellent he has been for our platform. So, with that in mind, I ask, without upgraded heads and cams is it possible to reach the 650awhp mark on the DR750s? Most of the amazing DR750 builds that I have seen, Jeff, Eric, and Ray off the top of my head, have Stage III heads... will the stock heads restrict me even when using e85?

Also, it felt like there was some slight resistance whenever I wanted to shift into second gear-- does anyone know what that could be? It felt as if I had to overcome a thin wall before shifting into second.

Thank you and looking forward to updating you all along the way!

And thank you to Ray, Jeff, and Matt for showing how amazing these turbos are and what td04s are capable of. I would like to catch up to Jeff and Ray's amazing builds but only time can tell!
 
#173 ·
Sorry to hear about the trouble with the proefi. Everyone I've talked to it has ranted and raved about it as being the best standalone out. I know it's definitely huge coin to drop for it but it seems you need to get it into the hands of a better tuner that cares.

I think with enough boost and e85 you can hit the 650AWHP mark. It'll be close but that's probably near where they'll max out without heads or cams.

I would check to make sure your clutch isn't dragging, nothing is blocking or hitting the shifter cables on the transmission, and also check the bracket on the transmission itself that holds the shifter cables to make sure it isn't loose. I had that problem with those two 12mm bolts working themselves loose and it caused my 3rd gear to grind even though the synchro and gear wasn't worn.
 
#174 · (Edited)
Thank you very much for the hasty reply! Yes, the ProEFI is no doubt an amazing standalone... if only I had the features that made it amazing. The one thing that I cannot complain about is the simplicity of being able to put pump and e85 in whenever I want without having to worry about a thing; however, I would have liked to have the setting that I have seen all over the internet that allows us to view the ethanol % (failed to provide it). It's unfortunate how our best tuners for this platform do not tune or have experience tuning with the Proefi because I would love to bring my car to any one of the legends that we have.

And 650awhp would be amazing! If I had the time of my life at 520awhp then 650awhp would make me one happy camper!

I am attaching a google document that I created to assist others with their quest for weight reduction. I spent hours trying to find some type of reference (a previous one that I found a year ago- I had no luck finding again) to guage what weight my car would be at but there was no luck. So I compiled this list to guesstimate in a conservative way where my weight is at currently.

The end number is roughly where I expected it to be so hopefully I will be a 3200lb 650awhp, DR750ed, daily-driven, street car!

Destrou-- 1992 Mitsubishi 3000gt VR4: 3781lbs

Weight reduction so far:

Tow hook: 10lbs
Spare tire: 25lbs
Jack/carpet/etc: 7lbs
Rear crash bar: 37lbs
Front Crash bar: 10lbs
CF Driveshaft: 25lbs
Stripped interior behind front seats: 20lbs
Corbeau FX1pro: 60lbs
LWFW: 4lbs
AC: 50lbs
CC/Charcoal Cannister/ Vac. reduction/Clutch assist: 20lbs
Radio: 8lbs
Rear Antenna with motor: 2lbs
AA front and rear: 10lbs
Spoiler: 4lbs
Wiper/fluid: 5lbs
AWS: 30lbs
ABS: 20lbs
Coilovers: 18lbs
Single shot exhaust: 30lbs
Deleted cats/downpipe: 10lbs
Fog lights: 10lbs

TOTAL: 410lbs reduced

3781-410=
Currently: ~3377lbs!

I still have these left over:

Steering wheel/airbags: 10lbs
Lightweight wheels/tires: 50lbs
CF Hood: 40lbs
Battery: 20lbs

Future weight savings: 120lbs

Soon to be: ~3251 lbs

edit: to battle inflation. I scaled down some of the numbers to try and be more accurate... resulted in a gain of roughly 25lbs.
 
#175 ·
Dont know if you are making those numbers up as you go along or something, but they're all crazy inflated. The fog lights are 2 or 3 pounds, the steering wheel is the same. (the airbag doesnt weigh 20lb!) the radio antenna is a few ounces at most etc etc. I would cut all your numbers at least in half.
 
#177 ·
Yeah the steering wheel I meant to say both airbags but that one was definitely inflated. The fog lights I took something else along with it that probably equalled 10-15lbs. Other than that I don't think everything else is inflated. It's a rough estimate so I'm sure I'm off by no more than 25-40lbs.
 
#178 ·
The smaller numbers cut in half are still not going to change the end number by much. It's tough to guesstimate right now since I'm not with my car but I do agree some of the smaller numbers are inflated but they don't add up to much.
 
#179 ·
I thought FSR was a good shop. Too bad. You would think if the ecu was a standalone it would be easy to have all of its functions display easily. You were probably better off with AEM version 2. Sometimes it's best not to go a new route, especially with standalone so just for the sake of available support or lack thereof.
 
#184 ·
There is a reason besides Dale that the socal 3S insiders are staying away from this place and with Erick leaving I worry about its future even more. nah I dont worry lol.
 
#180 ·
Yeah, I agree, it's unfortunate because at the time it was the only ECU to provide a flex fuel sensor. I believe the AEM one is still having issues but for the most part it mat have been better to wait for AEM to jump on the flex fuel train.
 
#182 ·
Hmm... not sure what to do then. I spent about 8k altogether (tune included) on the Proefi setup for me to abandon it now would be a huge waste. I love the proefi but I do wish our beasts of the platform knew how to tune with it.
 
#183 · (Edited)
there arent a lot of people with this platform that has a pro-efi, that being said, it would take time and money to tune when the majority of us have aem, or chrome ecu's.

like dave said in my big boy build post.. just because something is new, doesnt mean the older stuff no longer works. building a car with the Right mods is the key....

I may be wrong but I dont know of any big hp 3's running a pro-efi. once or if more tunners feel the need to learn the system that could change. I dont think it will in the near future though.

keep us informed
 
#185 ·
Very little reason to go proefi on a 3S with AEM series 2 now available. Since you already have it, I'd take it to a proven proefi tuner like Sound Performance.


Sent from AutoGuide.com App
 
#186 ·
I am curious to see how much the dr750s can make with stock heads and cams. It is clear that I won't be able to touch Ray or Jeff without Stage3 heads, but I must say that I must give Dale's car a lot of credit for reaching his whp on stock heads. Based on the numbers that I'm seeing and the people who I've spoken to, it seems like 620whp will be the number to reach with stock heads. If this doesn't help people see the value of Stage3 heads and cams then I don't know what else will! A long term investment it will be.
 
#187 ·
The time has finally come! The 3.1l forged, ported and polished engine is FINALLY in my car with the DR750s.

So now it is only a matter of time until I finally break into the 600whp club finally!

My rebuilt DR750s waste gates were set to 18psi. I have stage 2 heads to go along with the forged bottom end so I do plan to push these v2 turbos as much as I can (hopefully to 35psi). WISH ME LUCK!

The place that I will be bringing it to has a Mustang Dyno and this one in particular has been known to read VERY low (their dyno day is filled with complaints lol). Looking forward to see how it reads on a Mustang dyno though!

DESTROU 2.0 is officially underway!



 
#190 ·
wow man congrats

its gonna be a beast after tuned

cant wait till i see some dyno numbers :moon2:
 
#194 ·
First review after finally receiving my 3000gt VR4: HOLY SHITTTT!! I thought that it was great before... but good LORD was I missing out! I do think my old setup starved the turbos of oil and hindered its performance because the new dr750s are spooling so lovely now! A completely different experience! Flames shot out of the exhuast, the straight pipe/test pipe has an amazing growl, the handling is superb after dropping roughly 500lbs and installing the Addco rear sway bar; and last, but not least, traction is a problem now because my snow tires couldn't handle a third gear pull.

I'm doing a hard break-in with the new 3.1l and will be replacing the oil filter/using conventional oil after the first 20, 100, 500, and 1500 miles.

Also, after a lot of thought, I have decided to tune the ProEFI on my own. FSR agreed to help me out along the way with any questions and/or concerns/difficulties that I may have along the way since they helped set me up with the original tune. I must thank them a lot for the assistancee in advance. I will also be reaching out to many others to and ask a million questions/ do hours of research before I make any decisions with tuning. Charlie Doe wrote up a great guide for tuning AEM so I wll be reviewing that and applying the information into the ProEFI.

Looking forward to sharing the results but so far the overall grade for this car: MUCH BETTER THAN EXPECTED!

It feels like I'm driving a race car on the road (I pretty much am) 0=)
 
#196 ·
Looks Awsome bro glad you got it all figured out :) should be a fun street car
 
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