Underground Motorsports: Project 800HP RB26DETT 1998 240SX - Page 7

**toadx8u** · 09-27-2007, 10:35 PM

Quote:

Originally Posted by underground

Also, took the car to be weighed, and I was pleasantly suprised.

With full interior minus a passenger seat, and 3/4 tank of gas, the car came out to 2890 lbs.

my car tipped the scales at 2995 with 1/2 tank full interior and me...im roughly 165

Shaggy's 240 · 09-28-2007, 12:28 AM

JUMPIN JEHOSOPHAT BATMAN!!!! Look at the size of that turbo lol good god you could suck a squirell in through there if your not carefull, better make sure your runnin a filter on the street, small animals and turbo internals wouldnt mix very well i think o_O

Syline · 09-28-2007, 11:00 PM

where you at in Dallas, I would love to come out and see this thing.

underground · 12-25-2007, 09:24 AM

I live in Oklahoma City, OK now......but my car is currently at Matchless Performance in Addison, TX.

shockster0429 · 12-28-2007, 12:09 PM

Quote:

Originally Posted by underground

I live in Oklahoma City, OK now......but my car is currently at Matchless Performance in Addison, TX.

A few questions for you using e85 with the 40r.. Did you have to modify anything to allow it to work? And when switching between fuels did you have to do anything? Thats a really good idea. Since the octane is higher...

underground · 01-15-2008, 10:16 AM

Here's the latest update, the car is finished with the Borg Warner 74mm Single Turbo, and the new 4" Downpipe and Exhaust. The turbo back exhaust is straight 4” piping broken into three pieces via V-bands. Photos are posted below.

This thing sounds absolutely wicked, and we are putting together a dyno video to post up.

I want to thank Matchless Performance in Addison, TX for the piping work, as it came out flawless.

**240SXAddict** · 01-15-2008, 10:27 AM

We'd really like to hear it!

DeclareYrWar · 01-16-2008, 02:55 PM

yeah man, i'd love to get even just a sound clip of this thing! looks great

Radianation · 01-18-2008, 10:13 PM

Awesome. Awesome. Awesome. Awesome. Aweeeeeeeeesome. I so want to be at this point with my build right now. Post some videos so I can live vicariously through you!

Xracer · 01-20-2008, 09:21 PM

If your willing to spend the money, a JUN surge tank would definatly provide you with some significant gains. I can get ahold of JUN parts as well, if you happen to be looking.

underground · 01-31-2008, 10:53 PM

Sorry for the dusty valve cover shots, I'll get some better ones this week.

Here is the completed engine photos showing the new Borg Warner 74mm ETT Turbo.

We put the car on the dyno this weekend, special thanks again to Chris Hamilton for the tuning. You truly are amazing.

Dyno Video Link:

http://video.google.com/videoplay?do...90394196&hl=en

At 18 PSI (593whp), the car ran out of fuel, and we found the problem to be a dead Walbro Fuel Pump. We'll be going back this weekend to retune for 25 PSI, expecting around 750whp.

Then onto the C16, where we will shoot for 900whp.

Largekid · 01-31-2008, 11:03 PM

congrats! that thing is a beast!

DeclareYrWar · 02-01-2008, 01:27 AM

glad to finally see all this hard work come to a finished product. can't wait to see this thing putting down 900, gonna be insane

underground · 02-04-2008, 09:06 PM

Update:

Went back to the dyno this weekend with new fuel pumps, and ran into our next problem, maxing out the 1000cc injectors at 624whp/442tq.

1600cc injectors are being installed this week, and we'll head back to the dyno for round three, haha.

The E85 really requires big injectors, and I never imagined we would max out the fuel system this quickly. Im guessing we're going to end up with a Weldon Race pump, as the dual walbro's are really struggling to keep up.

Enjoy the Vid!

http://video.google.com/videoplay?do...87815456&hl=en

skribblah · 02-15-2008, 02:52 PM

i hope it blows up and catches fire, burning to the ground.

loc_staa05 · 02-15-2008, 03:20 PM

jealousy is a bitch huh?^^^^

I R Slacker · 02-15-2008, 03:48 PM

Just throwing it out there to everybody, E85 while being cheaper.. isnt better than normal gasoline. It is worse on gas mileage (not that that matters here), and also on performance. Look at this study

http://www.edmunds.com/advice/altern...3/article.html

I also did a project on this at school. Just an FYI before you change your whole fuel system over (unless you did, I didnt finish reading the thread)

RuKaMiR · 02-15-2008, 04:37 PM

can the public come to view this car at the moment?

Nick51 · 02-15-2008, 05:12 PM

when does boost kick in for that size of a turbo

DriftX · 02-15-2008, 10:45 PM

Very nice fab work on the exhaust. I bet that thing sounds amazing. E85 Uses about 32% more fuel as compated to the volumetric efficiency, so it's going to take some huge injectors to flow 900hp worth of fuel. I'm glad performance shops are starting to integrate alternate fuel sources into their performance! Very clean swap as well.

underground · 02-16-2008, 11:42 AM

Quote:

Originally Posted by RuKaMiR

can the public come to view this car at the moment?

Car is on the dyno as we speak with the 1600cc fuel injectors

Matchless Performance is located at:

3221 Skylane Dr suite 110
Carrollton, TX 75006

We should be there until around noon CST.

underground · 02-16-2008, 11:46 AM

Quote:

Originally Posted by DriftX

Very nice fab work on the exhaust. I bet that thing sounds amazing. E85 Uses about 32% more fuel as compated to the volumetric efficiency, so it's going to take some huge injectors to flow 900hp worth of fuel. I'm glad performance shops are starting to integrate alternate fuel sources into their performance! Very clean swap as well.

The 1600's in the car should be good for 900-950whp.

We'll never get there on E85, as I only plan to push 25 PSI on that fuel.

Anything over that, and I'll run C16 where 1600's will be perfect.

mybro240sx · 02-19-2008, 02:58 PM

underground do you live in arkansas and come to carrollton to do you project

RuKaMiR · 02-19-2008, 03:23 PM

i mean like are you goingto be in the dfw area for a while and is there a spot where i could just stop buy and check it out in the after noon

underground · 02-19-2008, 09:43 PM

Update:

Wanted to welcome Deatsch Werks to the list of corporate sponsors on the project car.

We went back to the dyno this past weekend with a set of 1600cc DW Injectors, and they performed flawlessly. The car now has plenty of injector for the current setup.

With that being said, the day didn’t end up as we hoped. We maxed out the dual Walbro 255 lph fuel pumps @20 PSI on E85. The car made just over 650whp before we had to call it a day.

I made a call to my friends over at MagnaFuel this afternoon, and they suggested their street friendly, Inline Protuner Series Fuel Pumps. The particular model they suggested is MP-4303 rated at 2000HP in N/A Applications using gasoline. (good for around 1300 HP on E85).

What’s unique about their race pumps is they are E85 compatible, rebuildable, and they don’t require a fuel controller like the Weldon’s. (And various other brands of “race” pumps.) This is a significant cost savings, and makes this pump is fairly “bolt-on” affair in a car with an aftermarket fuel system already installed.

The new fuel pump will be installed in the next two weeks, and I will write a review for those that may be interested in our findings.

We knew three weeks ago the 1000cc injectors and dual walbros were not going to get us to our goal, but I wanted to see how far they could be pushed on the E85….as I know many on here are debating switching over in their own vehicles.

Here’s the latest dyno video, notice the fuel pressure gauge video at the end:

Underground Motorsports Demo Car1998 RB26DET 240SXMaxing out the dual Walbro 255lph Fuel Pumps at 650whp@20 PSI.Borg Warner S374 Turbo, 1600cc Injectors, E85 Pump Fuel, AEM ECU, etc.