0INTMD8

I'm starting the twin turbo build on my ZO6 so I thought I would post some pics and info. I will scale the car before/after to have an exact weight difference.

Here is the basic parts list-

427ci engine, World Warhawk block, LS7 crank, Callies compstar rods, CP pistons (coated), pvd coated stainless top ring/ductile second ring, coated bearings.

ETP LS7 heads, 6 bolts per cyl, PSI valvesprings, Xceldyne retainers/locks, Smith Bros pushrods, LS7 rockers w/harland sharp bearing upgrade, Comp Cam hyd roller, Morel link bar lifters. LS7 intake manifold.

Modified LS7 oil pan w/extra pickup going to external -12 a/n port. Internal volume reduced. Belt driven 3 stage external pump. 2 stages for turbo scavenging, 1 larger section as an additional scavenge stage to the engine (hence the extra pickup in the pan).

APS twin turbo system w/ceramic coated manifolds and turbo housings.

McLeod RXT twin disc clutch and Quick time bellhousing.

Driveshaft shop axles/hubs, diff output shafts, driveshaft.

RPM Level 5 T6060 Thanks RPM!!!

Eboost 2 controller w/gear based boost control.

HP tuners 2.5bar Speed Density operating system.

I'll update this thread with info and pics as the build continues.

jim@speedinc.com

http://www.speedinc.com/turbo.cfm

1bdasvt

SWEEEET looking Vette!!!
What type of rubber are on the rear wheels?

Mr.Big

excessive81

bad azz!!!

ayousef

lovely, keep us posted man!!

EdwardETraylorIII

How did you wire the eboost2 for gear select boost levels?

I can't for the life of me figure out how to wire it on my car. I appreciate your input!!!

THE TECH

$$$$$$$

Vert_Fan

Now this is a cool build!!

Definitely keeping track of this one!

Just a question.....why keep the LS7 crank?

I heard that after removing the light weight ti connecting rods for forged steel ones, the crank balancing needs enough heavy metal added that after all that you are only a couple hundred from a new forged crank + you could leave the LS7 short block together and sell it like that would make more sense....

Have fun with the project.

0INTMD8

Thanks guys.

As far as the gear based boost control it is under the 'switch logic' section of the eboost2 manual

You can have 4 set points triggered by external switches. Basically I'm going to build a mount for microswitches that are triggered by the shifter which will allow a different boost level for each gear

The LS7 crank I bought from GM, but you are correct it took alot of metal to balance so in the future I would just go with a Callies. (I'm removing the LS7 from my car and keeping it intact from intake to oil pan)

EdwardETraylorIII

INTMD8,

Thanks. I didn't think the eboost2 would just "wire in" without a lot of trickery with that gear selective boost control.

Also, on that crank, I know that for a fact, the factory LS7 cranks can handle 1500+ HP before they *might* start to see any issues.

However, it takes so much darn metal to balance 'em with forged rods and pistons that it usually makes more since to just buy the better callies stuff.

Let us know what kind of power you end up making!

0INTMD8

Today the car was put on the rack and scaled. Results are in the attached pic.

I know I'll cringe the next time it hits the scales but hopefully it won't be too bad.

0INTMD8

Well I've got the Warhawk engine in place on the front cradle and replaced the stock driveshaft with the upgraded unit from the driveshaft shop.

Waiting on the external scavenge pump from Johnsons HTP and the long diff output shaft from RPM.

Attached are a few pics of the progress, including the new engine in place, the take-out LS7, jet-hot coated APS manifolds, the McLeod RXT twin disc and the Quick Time bellhousing.

I'm on vacation this next week but hopefully some new parts will be waiting for me when I return.

ayousef

Love that smiling face on the engine (1st pic)

NICK YOSKIN

ill be watchin this jim!

seems like everyone wants a 1000 rwhp vette now!

oh mine was A4 and 5500 rpms....

ayousef

me being one

0INTMD8

Pretty car Nick!

Did that 1000+rwhp LS1 A4 ever get you down the track as quickly as my 890rwhp 6-speed LT1?

aTX427

Nice set up. How long did it take to get the heads from ETP? I did not know you could run factory LS7 rocker arms on them.

0INTMD8

Thanks. It takes a very long time to get heads from ET. I was quoted 6 weeks but it took months.

They have an option of supplying rocker stands which allow you to use stock rockers. That is one of my favorite features of these heads, I just wish they were easier to get.

0INTMD8

I got the scavenge pump, which is a very nice piece. Thanks Roy! It didn't fit down low as I originally planned so I ended up mounting it on the passenger side cylinder head.

I milled up a bracket for the upper mounting bolt and also a standoff for the idler pulley. (the pump is now the tensioner).

0INTMD8

Made a bit more progress. Started installing the APS fuel system. Also installed the 300m diff output shafts, Driveshaft shop CV axles/hubs, and RPM level 5 T6060 (all very nice stuff).

Also test fit the manifolds/turbos/downpipes so I could check clearance with the Quick Time bellhousing. Ended up having to trim it for downpipe clearance on the drivers side and trans cooler lines on the passenger side.

So far everything included with the APS turbo system has been of exceptional quality