Sweet so no more than 7. thats above what i was gonna go anyway, at least for now. so no higher than 110 is safe for me at my stock compression.
As for plugs im already running NGK TS6ix set at .040 for now.

 

ok to get a good handle on this so that i can get it right the first time lol heres some more questions for ya.
1. Fuel system.
-ok, im getting 42# injectors for now, and a ractronics fuel pump and wire upgrade... what else in regards to the fuel system do i need keep fuel going under boost? Im still trying to learn how the BOV, WG, and manual fuel pressure regulator work with each other and whatnot. need guidance.

 

replying in pm/email

 

thanks, PM recieved. Still researching everything before i make any purchases.

 

Hey man, I take it your cold piping is 2.5" then? Also, do you know where in here you have info on your fuel system? I have a forged 347 being built and am hoping for around 550rwhp on my 67mm. Was wondering what exactly I would need to fuel it. Planning on 60 lb injectors with twin Walbros. Thanks!

 

Most of my cold piping is 2.25 (standard STS tubing from when I bought my used kit) some of it is 2.5 to mate up.

As far as fuel system, I basically have a 255 in tank pump and a Bosch 044 external pump with the aeromotive filter (if you want Part numbers I can provide that when I get home) the bosch only kicks on above 3k rpm. I also have a Fuel pressure regulator, so that the differential the fuel injector sees remains the same. Being a boosted car, I recommend you run a fuel pressure regulator.

 

ALRIGHT, im back lol
getting into the parts seach again.
SO far i found a Master Power T70-.96 turbine a/r for sale thats kinda a good start. Found other stuff too. Trying to figure out what spring to go with the wastegate though. i found a 40mm wastgate with a 10# spring but not sure if i shuold go with the 4# and adjust the boost or use the wastegate as the limiter and boost up to 7ish lbs and use the wastegate as "the alamo" for the boost? last resort if the boost gets out of control for some reason or do i have this backwords?
I know the BOV is for sudden throttle closure and overboost protection but what about the wastegate though? they seem simular in jobs just on different sides of the air streams.
Or shuold i get the 4# spring on the wastegate and have Boost controlled on the BOV side of the house? im confusing myself now lol
The moral of my question is im looking into getting wastegate and BOV for a T70 turbo lol

 

Just get a 40mm wastegate and whatever size spring you want to run boost at. If you plan on running higher boost, a boost controller does good at controlling peaks & etc.

put it this way, I'm running a 76mm turbonetics with a 38mm wastegate with a 11.6 pound spring and I'm running nearly 11psi of boost and it never spikes or surges.

get a wastegate spring and be done honestly. keep it simple.

 

I'm building a kit almost identical to what you have. Do you have any numbers for your new setup yet?

 

So if i want to keep my max boost at ANYtime under 10lbs without hurting anything an 8 or 10 wastgate spring should be fine right? then just keep boost limited as a whole to 7ish LBS right?

 

also wanted to know if thes Turbos would be a suitable canidates for rear setup with basic bolt ons, a Stall, and a tune (of course lol)
Im not sure if i should go T76, T72, or T70. All around .81 A/R

T76
TURBO SPEC:
Intake :4 inch
Outlet: 2.5 inch
Compressor trim: .80 ar
Compressor Wheel diameter 76.80mm / 102.35mm
Turbine Wheel diameter 57.47mm / 83.16mm
Exhaust trim: .68ar
Turbine flange type: t4 flange
Downpipe flange type : 3 inch v band flange
Cooling type: oil cooled only
Horsepower rating: 900+ hp

T72 turbo charger .84ar (T4 FLANGE)
Intake :4 inch
ANTI SURGE compressor housing
Outlet: 2.5 inch
Compressor Wheel diameter: 72.35 /102.86
Turbine wheel diameter : 68.40 /79.00
Exhaust trim: .84 ar
Turbine flange type: t4 flange
Downpipe flange type : 4" v band flange
Cooling type: oil cooled only
Twin scroll turbine housing (quicker response then single exhaust outlet )
Horsepower rating: 600-700hp+

T70 Master Power Turbo 450-700hp "P-Trim"
-Journal Bearing Cartridge
-Oil cooled only
Compressor
-58 Trim Inducer Wheel
.70 A/R w/ 4"(101.7mm) inlet and 2.5"(64mm) outlet
Turbine
-76 Trim Exducer Wheel (P-Trim)
.81 A/R TURBINE HOUSING w/ standard T4 undivided Inlet and an 3" v-band outlet

OR

T70
4" Inlet
2.5" V Band (one clamp and one flange)
Wet Float Bearing
Divided T3 Flange
Oil Cooling
600 HP Capable
Compressor Wheel .70 A/R
Ind: 52.76 mm
Exd: 75.46 mm
Trim: 48.9
Turbiner Wheel .84 A/R
Ind: 57.75 mm
Exd: 73.35 mm
Trim: 61.9

Also whats with Twin scroll turbos? useful or not?

 

Let me throw my opinion in, this is from my own personal experience.

1. skip the 42's go straight to the 60's
2. have Forced Inductions help spec the right turbo. Everyone knows spool is a issue with a rear mount but it's easy to forget that backpressure with a small turbine a/r is just as bad. I had alot of issues with my rear mount that was related to high back pressure.

 

If your refering to me, yeah ive already decided to for go the 42lbs and go with the 60lbs since i was gonna go with a bigger turbo anyway, might as well go with slightly larger injectors too. Im still wondering about a completly oil-less turbo as well ive been reading about latly. Thats a crazy item there, but i figure ill get the other stuff first.

 

Yes, sorry didn't make that very clear.

 

no biggy, i already was talking to frost about this before and he showed me the power to injector formula for proper sizing and turns out, 60s or even 70-80s would be more ideal, but 60lbs would be plenty for my modest goal of 450-500ish HP.
Now if you could do the same with recommending Turbos, thats what i need guidance on lol

 

hey ZL1 what kind of numbers are you putting down and more importantly how loud is your car? mines finally up and running and good god its loud. it hasnt been tuned yet but i doubt its gonna have the ***** to back the noise.
http://www.youtube.com/watch?v=-nx20nmlATA
http://www.youtube.com/watch?v=0OI9dp_SUqo

 

mine is pretty loud...didn't i load a youtube video ... here it is:
http://www.youtube.com/watch?v=1HGNeDDdc70

I will get a better video up soon, farther away from the car so you can hear it, when the damn weather quits pouring down. Nice, that is pretty loud.

There have been quite a few changes since my video. I still need to head back to my fabricator, have him install the threaded metal IAT sensor... and I'm debating methanol injection.

Currently tracking down a transmission leak, I think it is the rubber boot at the rear of the transmission where the driveshaft goes into the transmission. I do NOT think it is the actual rear seal.

THEN I'm going to hit up the dyno. So it may be another month or so before everyone gets my numbers.


It pays the bills nicely to travel with work, but it leaves no time to get things done at the house, I would have already had all of this fixed, but with my recent travels to Oman from November 11th to Dec 17th 2010; and then my trip to India from March 12th to April 9th I haven't had much time. Been trying to get the house all cleaned up and get my storage building in the backyard up.

Things should start coming together though


Joshua, as you are trying to make 500, to keep good spool time & etc, I would go with something smaller than a 76mm. Talk to Jose@Forced Inductions and tell him what you want to make & keep spool time to a minimum. I would think a 72mm would be fine to make 500hp, as my TC76 from Turbonetics I believe is capable of 800rwhp (could be wrong).

 

I almost had to fab a connector for my iat but I switched it to an 85mm gen 4 mass air from a ls2 which has it built in. Then I got the 5 pin harness adapter so it's all plug n play. Btw I found your YouTube page lol.
Im waiting on some odds n ends to get installed on mine like my line lock and boost controller so I hope that I'll be seeing a dyno soon myself.
For the turbos it's my understanding 67 is good for 500, 600 max.. our 76's max at 800
my fuel setup is a 255 in tank with a Kenny bell boost a pump,FPR, and 60lb injectors. I hope my bsfc is around .6 or lower after all the engine work but I'll only find that out when she gets tuned.. Fingers crossed

 

cool, thats what i was thinking but was wondering since they all have a .81 AR i was wondering if they would have simular spool characteristics. SO at least a T72 will have good overall flow and spool right?

 

eehhhh well, the .81 a/r is just that. a ratio. i went from the standard t67 with a .81 to my t76 with a .81 ar and you can see the difference.