Well finially the motor is finished. Specs are below:

Compression Ratio:
8.7:1
Cam: Comp Cams Hyd Roller

- Duration
Intake - 214° @ .050”
Exhaust - 224° @ .050”
- Lift
Intake – .531”
Exhaust - .568”
- Lobe Seperation
115°
Heads: GM LT1 Aluminum Ported

- Type
Aluminum, Three Angle Performance Valve Job, Bowl Porting, extra porting on exhaust side for turbo
- Combustion Chamber
56CC
- Intake Runner
195cc
- Intake Valves
Stainless Steel 1.94”
- Exhaust Valves
Stainless Steel 1.60”


Block: 4-Bolt Main, ARP Main Studs, Thermally cleaned and Stainless-Steel Shot. Inspected by MPI process. Bored .030”, honed w/ torque plates and pressure washed. Clevite cam bearings and pioneer freeze plugs installed.
Crankshaft: Eagle 4340 Forged Steel, Internal Balance
Connecting Rods: Scat 4340 Forged Steel I-Beam Rods 5.7” Full Floating
Pistons: SRP Forged Pistons
Rings: Speed Pro Plasma-Moly Rings
Rocker Arms: Comp Cams Aluminum roller rockers 1.5 Ratio
Bearings: Clevite H-Series
Core Plugs: Brass Pioneer Core Plugs
Lifters: Comp Cams Hydraulic
Pushrods: Comp Cams
Valve Springs: Comps Cams
Timing Set: GM LT4 Extreme Duty Roller
Oil Delivery: Melling High Volume Pump, Pick up Tube and HD Drive
Block is O-ringed
Head Bolts: ARP Performance

The turbo I am using is a T67 upgrage from STS. I have no idea what HP gains I will see but I am excited about the project. Hopefully we can get some numbers up whenever the shop is finished with the vehicle. Hopefully by next summer I will have saved enough money for the new rearend. Question I have is how many LB of boost you think I can put on this motor?

 

You should check with the engine builder, but I'm planning on running 15 #'s on the street on pump gas, that's with 8.5:1. I have a similar project going for my LS1. Good luck, it should rip!!

 

on pump gas, i would say your max psi would be 9 or 10, considering there isn't an intercooler. you could get the methanol upgrade, which i would suggest since you are getting the bigger turbo, which will let you run higher boost.

at 7 psi, you would be around 595 hp @ 5500 rpm and 569 lb/ft torque at 4000 rpm (according to dyno advanced engine simulator).

thats on pump gas (w/o methanol).

and a little side note b/c i've been going back and forth on who i should have port my heads and where to get the cam from. lloyd elliot will do a cam for how many lbs of boost you want to run for the same price as any other le1/le2/le3 package, that way you get a cam that is designed for you setup, instead of the 12 psi blower cam you posted.

 

I would also recommend getting your cam through Lloyd Elliot for price/feature. Go with something completely custom and fully billet since you're already spending the money.

 

I didn't even notice there was no intercooler listed. That will definitely be your limiting factor. With all the stuff your doing, why not go with a FMIC?

 

Hey guys,
Thank you for all the good advise. I should have inquired before starting this project. I do relize there will be some limiting factors of this project. As I get the time and $$$, these other items will be added. Thank you all again for the information and support.

 

Finially got the car out of the shop, dam this thing has a lot of HP. No numbers yet. I got to put some miles on the car. I can tell it has a lot more HP than the stock engine. Once I put about 4 or 5 hundred miles, the shop is going to tune it.

I tried to go for inspection and smog the other day, but they claim they herd an exhaust leak (yea, right ). I took it home and found a loose header bolt on the passenger side and I tighten it. But I dont hear any difference. I am afraid that I am going to have to pay this idoit to fix what he claims he hears. Other than that the car runs great, starts right up. The tuner calls it a beast and says that we should get over 500RWHP which is plenty for me now.

 

That's cool man. How much boost are you running right now?

 

Have not put my foot in it until I take it back for tunning. That will be soon

 

Dog-gone-it
Took the car for a couple of pulls yesterday. We blew the CAT, stuff everywhere. After inspection found that there was no turbo damage. The rest of the stuff was blown out and everything else was installed back with a vacant CAT. The car is much louder and you can hear the cam lope and turbo wine. When ithe CAT blew, it went up to 380HP with over 400lbtq at 42000 RPM. The car was shutdown immiately once the CAT blew so I don't have the full numbers at WOT. Hopefully will get some good numbers next week.

 

I knew STS spooled late, but damn!....

 

HATER

 

He is indeed a STS hater, but in this case I think he was joking due to the "42000" rpm number the originator mentioned.

 

Gotta watch those digits. The guy that made the commit has been a STS hater for a while

 

It's almost as if you guys get easier and easier to offend You guys cant even take a little joke. Insecurity?

yes I was poking fun at the typo...