Next month I order a twin turbo setup for my stang. 347cid, everything race and Dual 900hp Garrett G35-900 turbos.

What is a good safe CR that still has power?

I was thinking 8.5 or lower?

I estimate boost levels around 30psi. I will install a boost controller also. External wastegates.

Is the Garrett G35 (900hp) a good turbo if I get them with ceramic ball bearings?

My first turbo setup. Was running a Vortech s-trim blower. Time to upgrade!

=Thanks everyone!

 

What fuel? If fuel is decent lowering compression just costs you power. Zero reason to run 8.5:1 on anything. The G35 is really just a 62/62 so don't go expecting 900hp out of each. Really for $4k worth of turbos plenty of cheaper singles will do a better job.

 

It isn't totally about CR it is also about fuel! What kind of fuel are you going to run? If you are running race fuel you probably could hit 10:1. Meth and e85 you would maybe be safe at 9-9.5.

93 Octane not gonna make it though lol

 

E98 Race gas. I'm shooting for 1500hp @ crank, so I think the turbos can make 750 each.

 

More cubic inch, 388 and 11:1 comp. for E98 imo.
Mandingo runs a 388, big single garret, and made 1,400+ at the wheels.

 

Stock CR for my 1992 Mustang is 8.8

Thanks for all the good info everyone.

I will be running either e85 or e98 (two different tunes on my ECU).

I feel safe @ 9:1, so I might as well keep it at stock. It was always safe and powerful with the old s-trim blower.

I believe E85 is 105 octane and E98 is even more. No meth or water injection, or is it worth the money and performance gains?

 

I'd go 10:1.

 

10’s minimum anything else is meh

 

What rpm range? Which dictates cam events. Which results in dynamic compression based on static CR. Too low, it'll be a dog. Too high, will need water/meth or better fuel. What IC? Detonation is influenced as much by CC heat as cylinder pressure.

Plan bigger turbo(s). You're much better off in the center of the compressor map than on the outskirts as a heat pump.

 

6500rpm redline
Hope to begin producing boost in the 3000-3500rpm range
E98
Comp Cams Extreme Energy cam .555" intake lift
Long intake runners. Ported intake
80mm Throttle Body
Nitrous Express Intercooler spray bar kit. Sprays cold A$$ air through the intercooler
NX 25-50hp wet piranha nozzle to spool up faster @ low RPMS and to keep the air intake temp low.

What is IC? Intercooler or Ignition control??? Ignition coil?

Thanks for the recommendations

 

6500 RPM is laughable, as is .555 lift for 1500hp. Skip the nitrous for kids and get a real intercooler. Zero need for nitrous to spool 62mm turbos faster. I feel like this is the tenth way you asked the same question.

 

You do realize it will take a massive amount of fuel to make this happen on E, what pump are you going to run ?

 

Please don't take offense but there's a lotta things not adding up here....
Peak RPM too low, cubic inch too small, cam too small, turbos too small, target compression too low, fuel system requirements, etc.
Sounds like you fell in love with 1,500hp as a number but don't really grasp what it will take to get there as well as the supporting parts needed to do anything with it.
Lower your expectations to the 1,000hp range and you'll be about where you need to be based on what you've shared.
Not trying to be a dick, 1,500hp is a huge jump from say 1,000hp is all.

 

Agree with all of that ^^^

 

That setup sounds like you pieced it together from searching late 90's import forums for setup advice.
And I don't mean late 90s model cars. I mean posts made in the late 90s.

 

8.5:1 . 6500 rpm redline. 30 psi. 6262s. This guy needs to get off Youtube watching 1997 LS build videos lol

 

Thanks for being honest. Perhaps a Lunati Solid lifter cam to get the rpm up to 8000. Larger turbos. 9.5 CR. I am stuck with a 347cid. Perhaps I will shoot for 1200hp @ crank.

Thanks ******!

 

I currently own a new Aeromotive A1000 complete kit. Double AN Fittings on sumped stock tank. I will also be running an Aeromotive Eliminator pump with seperate feed lines. According to Aeromotive, this total setup should be able to feed 1400-1500hp.

Per Aeromotive website:
The Eliminator performance you expect and more:

• Fuel Injected Engines: GAS
  up to 1900 FWHP – naturally aspirated
  up to 1400 FWHP – forced air induction
• So E85 forced induction - 980 FWHP
• A1000 E85 forced induction - 490 Flywheel HP
• Total for two pumps: 1470 hp of E85 @ Crank
• Kenne Bell Dual Boost-a-Pump @ 14.1volts ~1500+ hp on E98

E85 requires a 30% larger fuel system.

Holley 160lb/hr fuel injectors.. Flow matched
I ultimately want 4hp/cubic inch. 347 X 4 = 1388hp @ crank

 

I didn't realize you were using a Ford engine, is it an aftermarket block good for 1,500hp?
If its a stock block it ain't gonna happen lol.

 

You would be better off keeping it simple going to a single brushless or Weldon 2345. I wouldn’t want that high of a duty cycle using 160lb injectors. You will have to run high pressure, if you study flow charts you will see as pressure rises the pump will lose flow.