sr20dime

Hi Everyone,
I haven’t had much time to make a post but I’ve been working on changing my setup to be more competitive and reliable.
I started a couple of years ago with a UPP 62mm TT kit and loved it. I made over 1200whp with the setup but I decided to change directions and go to more of a racecar setup and make the car easier to work on. There are so many details in the car I couldn’t explain in writing. I’ve done most of the work myself with the help of friends or had friends stop in and do some stuff I’m not skilled with.
It’s been a long road but I hope to make my first shake down passes with the new setup in Indiana at the Wannagofast event in October.
I’ve added all the pictures I have access to right now. I will probably update later next week with more and try to update everyone as I make new progress. I’m sure I missed a million things but this should get you started for now.
Anyway, here is my new setup below:

My Engine:
427 LSX
Billet Crank, Billet rods and Wiseco Pistons
PRC Cathedral port heads 247cc

Drivetrain:

RKT56 Performance built ZR1 TR6060 with Brace


RPS Quad Carbon clutch




RPM rear diff


DSS 1 Piece driveshaft with no couplers

Now for the biggest changes in the setup:

I switched to a custom manual rack




Brakes:
Custom manual Brake master with no ABS (see engine bay pictures)
Twin Stroud parachutes (not mounted yet, Pics later)
DBA 2 piece rotors

Suspension:
Custom coilover setup

LG Billet spindles and LG stiff rear sway bar


Spherical bushing kit




Wheels:

Weld Racing 15” wheel setup


Turbo Setup:

PTE 6870 w/ T4 Divide housings (I chose divided housings so I could do a quick spool valve later if I needed)


Forward facing manifolds that I did a little fab work on for fitment.










Garret 4” intercooler core from Shearer Fab




Individual cylinder wideband setup with back pressure compensation system over canbus (2x AEM 4 channel controllers)






Individual cylinder fast acting EGT setup over canbus


Fuel system:

Weldon big Fuel pump setup (2200hp capable) -10 feed and -8 return




I Consolidated to 1 (passenger sided) factory gas tank and extended the fill hose. I don’t have good pictures of this right now but you can see the factory end of the corrugated crossover tube I modified to extend the fill line from the gas tank lid.


Bosch 1650 Injectors
2x Radium fuel pressure dampers (on the front of the rails)
Fuelab large regulator- You can see in the engine pay pictures I hid the fuel lines in the wiper cowl and routed the lines to the back of the rails instead of the front.

Ignition:
I went to 8 IGN1-A. I made a custom carbon fiber mount in AutoCad and had a friend cut it out on his machine. I mounted them below the headers to reduce the heat to them and still keep them close to the plug.






Cooling:
Moroso Electric pump (see engine pictures
Inline thermostat
-16an Lines
Radiator relocated to the rear inside the factory muffler area




Thanks for taking a look. I’ll update with more info as soon as I can!

schpenxel

Sub'd.

What fan are you running on the rear mount radiator?

Stock ECM or standalone?

sr20dime

It's a Flex-a-lite Black Magic Xtreme Series Electric Fan.
I changed to a stand alone. I have a Ms3pro setup going on the car.

bmfvette

Nice fab work . Who's exhaust manifolds? Really like the bushing kit.

Race car!

neverstop

holy ish this is going to be epic. love the rear mount radiator. subd

C U IN REARVEIW

Definitely watching this thread.......very nice!!!

1MEANGS

Quality build... Only two things I wish you were doing different 1. Get rid of the stick & put in a 4L80 / Glide... 2. Get bigger turbos. I'm sure you went w/ that size cuz you were prolly worried about them spoiling with the stick, but I woulda done twin 76s at a minimum. Those coils are the best, great choice on that. Good luck w/ everything looking forward to the results.

sr20dime

I may go glide later but the 6870s will support 2100+ whp. I can't lay down that much power anyway. Anything bigger would just create a worse power curve.
We'll see how they perform soon I guess.

SinisterC6

with good heads and an intake maybe. I got 1750 out of 76mm turbos

sr20dime

1750 maxed out? Interesting, what fuel did you run?
Twin 76 is huge. That only puts those turbos making 875whp each. That's not right for sure.

Dude_man

Im a simple man, I see front mounted twins and hit like! I planned on doing my radiator like yours until someone on yellow bullet said they had temp issues when street driving so they had to add another small one up front. As far as the ABS delete, what are you doing to trick the computer? I was planning on looping the signal(thanks carson)?

sr20dime

I'm not worried about tricking the computer. It is pretty much a racecar now. I have a standalone and custom gauge panel to fit a tablet for display. I got tired of the GM BCM/ECM mess so I tossed it.

Dude_man

Ahh nice didn't see a mention of the standalone. I plan on doing that eventually as well. Do you still have the bcm for the doors etc? Or do you not need it for that?

sr20dime

I am keeping it for doors. I'm trying to fake the signal so the factory start button works but if it doesn't I'll just go further racecar and add a push button start on a panel.
I'll keep you posted as I finish wiring over the next few weeks.
-Josh

Dude_man

Awesome! That will make my life easier

SinisterC6

Comp turbo 7678 1.2AR oiless

Fuel was C85

This was RHS heads and a GMPP intake

shizon'00

Finally a build thread!

GSpeed

We just finished a 427 LSX with twin 7675s, in a standard .96 t4, and its lit by 3800/4000. Minimal spool. I busted nick yoskins ***** a few years ago, because on paper, it should be laggy. However, it's not.

@16psi, it made 1220/1100, and carries to 7k.

Build looks good! Can't wait to see it completed!

SquirrelyNutz

Cool build, interested to see how much the 6870s can make. I don't think they will make 2100whp on an LS motor though. Do you plan on maxing the turbos out?

Impulse20098

Subscribed for an awesome build