Underground Motorsports: Project 800hp Rb26dett 1998 Silvia

[underground]

We now have everything finished with the motor minus the installation of the new 24x12x4 intercooler that arrived today.

I want to thanks Matchless Performance (Addison, TX) for the fabrication of the downpipe, which came out better than I would have ever imagined. The welds are amazing, and extremely clean.

Here are the latest images:

[underground]

While I still have the interior to finish off, here are the completed exterior shots.

This 240SX has been four years in the making, with 30 corporate sponsors on the stage II build.

I want to give a special thanks to Andy Vaughn @ Southern Imports, and Chris Hamilton (tuner) for their work on the vehicle.

[GTS4WD]

thats just simply amazing!

The detail on it its awesome!

Props!

[Rezz]

You painted the carbon! Well done, like I've said many times already, it just looks amazing, should drive amazingly well, and should attract an amazing amount of attention. Whats next???

[Spunky Munky]

crazy.... absolutely insane power... drool....

Need I ask what the quater-mile time of this beast is??

[underground]

You painted the carbon! Well done, like I've said many times already, it just looks amazing, should drive amazingly well, and should attract an amazing amount of attention. Whats next???

Interior, as the interior is bone stock right now.

[underground]

crazy.... absolutely insane power... drool....

Need I ask what the quater-mile time of this beast is??

I'm shooting for 9 sec 1/4 time slips.

[Spunky Munky]

I'm shooting for 9 sec 1/4 time slips.

Insane.... absolutely beast-like ... my car is running low 14's and I'm over the moon - but yeah, with the amount of mods and engine work, I would expect nothing less - do you think you reach the magical 8's mark??

[underground]

Sorry about the delay on posting up dyno numbers, but I have crazy busy and the car has sat for the past few weeks.

I have not added C16 yet, but I did tune the car for E85 Pump Gas. Right now, E85 (106 Octane) is $2.18/gallon at the pump here in Texas, so it's a no-brainer.

As you can see at 25 PSI, the car made 629/490.

I'm decently happy, but will be upgrading probably to a GT42R, as I really want to break 700whp on pump gas.

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.

Look for a larger turbo, and big power numbers over the next few weeks!

[Tofu]

have my babies. lol

[underground]

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.