[Korosion]

Currently have long tubes, E85, Intake and tune. adding the below. Let me know what you guys think!

-Circle D 8L90 Pro Series 2600 stall converter (1A)
-Trans Fluid
-PRC CNC LT1 Heads
-TSP Cam (vvt2)
-Chromoly Pushrod Set
-LS7 Lifters and trays
-Gaskets and Seals
-VVT 0* Phaser Limiter
-Timing chain guide
-DOD block off plugs
-PRC dual spring kit with titanium retainers
-CHE trunnion Kit
-Delco head gasket set
-ARP Head stud kit (bolts are back ordered)
-GM crank bolt
-C5R Timing chain
-Synthetic Oil with Filter
-Coolant

[parbreak]

Looks like a great combo. Fairly low stall speed. Any reason why?

[Korosion]

Originally Posted by parbreak

Looks like a great combo. Fairly low stall speed. Any reason why?

Thanks! and I wanted something that was great for everything, drag, street and autocross/HPDE

[KingLT1]

I would do at least a 3200 stall. The idle speed required for the cam is likely going to be pushing up against the brakes.

[gmcvt]

Originally Posted by KingLT1

I would do at least a 3200 stall. The idle speed required for the cam is likely going to be pushing up against the brakes.

This and doesn't the stall to torque ratio play into the picture here when talking about retaining driveability? As much or more so than the ultimate stall speed?

[Korosion]

I honestly don't know, I am just going off of what my installer/tuner recommended for what I use the car for.

[oldman]

Don't be me, get Johnson lifters and have them installed with proper preload.
My car with large cam idles at 900 RPM, FYI, the smaller TSP cam that I had idled at 850 RPM. Seems that DI and 11.5 CR can make-up for the loss of idle speed compression and vacuum. Frankly, I'm surprised.

I did the VVT limiter to 22 degrees? on my small TSP cam, most tuners don't use it anyway, I thought it would be interesting to retain it. Two things I notice:
1) this cam TSP says it is a perfect LT5 cam... interesting
2) https://www.motionraceworks.com/coll...t-w-roller-tip These look super.. must resist.

[KingLT1]

The main issue I see with the Circle D 1a is idle rpm. That VVT- 2 cam will likely want to idle around 800-850rpm and it will push against the brakes in gear with a converter as tight as the 1a. Stock coverter stall speed for the A8 is around 2200rpm if I remember correctly, so the 1a is slightly higher. Most NA builds go at least 3600rpm even with a stock cam, but imo a 3200 would work. Imho I think the better cam for your goals and setup would be the VVT-1.

Originally Posted by gmcvt

This and doesn't the stall to torque ratio play into the picture here when talking about retaining driveability? As much or more so than the ultimate stall speed?

sure does. I believe the converter OP is talking about is the 10.5" 265mm so it likely has a lower stall torque ratio for less slip down low(tighter) but doesn't hit as hard.

I would call Circle D and ask them their thoughts for sure. I had a 9.5" FTI 3600 soft hit(tighter version) in my 4th gen and it was great.. perfect for street/strip. I couldn't really go any smaller with the cam or it would of been up against the brakes with it's 850rpm idle. I ran it for a long time when it was stock cam and it still worked really well. jm2c.

[Korosion]

Thanks for the recommendations, I will call circle D tomorrow and ask about the 3200 stall.

[70chevelleSS]

Originally Posted by Korosion

Currently have long tubes, E85, Intake and tune. adding the below. Let me know what you guys think!

-Circle D 8L90 Pro Series 2600 stall converter (1A)
-Trans Fluid
-PRC CNC LT1 Heads
-TSP Cam (vvt2)
-Chromoly Pushrod Set
-LS7 Lifters and trays
-Gaskets and Seals
-VVT 0* Phaser Limiter
-Timing chain guide
-DOD block off plugs
-PRC dual spring kit with titanium retainers
-CHE trunnion Kit
-Delco head gasket set
-ARP Head stud kit (bolts are back ordered)
-GM crank bolt
-C5R Timing chain
-Synthetic Oil with Filter
-Coolant

Strongly considering doing a similar build with parts from Pray. A little intimidated by the prospect of pulling the motor. That’s about the only thing holding me back.
I’ve pulled the motor on my chevelle multiple times but I’m a little intimidated by this lt1 with the vvt and stuff like that. A carbed 454 is much simpler

[MP3BOOSTED]

Originally Posted by 70chevelleSS

Strongly considering doing a similar build with parts from Pray. A little intimidated by the prospect of pulling the motor. That’s about the only thing holding me back.
I’ve pull the motor on my chevelle multiple times but I’m a little intimidated by this lt1 with the vvt and stuff like that. A carbed 454 is much simpler

pulling the motor isn't that hard of a task to complete. Pray could spec out a more power driven cam though i would say, I did pretty much the same setup as OP but with the vvt3 cam and being a manual car.

If i could go back i would go with a bigger cam by pray with johnson racing lifters for added security as the ls7 do tend to fail on you.

[oldman]

Originally Posted by MP3BOOSTED

pulling the motor isn't that hard of a task to complete. Pray could spec out a more power driven cam though i would say, I did pretty much the same setup as OP but with the vvt3 cam and being a manual car.

If i could go back i would go with a bigger cam by pray with johnson racing lifters for added security as the ls7 do tend to fail on you.

[Korosion]

Originally Posted by 70chevelleSS

Strongly considering doing a similar build with parts from Pray. A little intimidated by the prospect of pulling the motor. That’s about the only thing holding me back.
I’ve pulled the motor on my chevelle multiple times but I’m a little intimidated by this lt1 with the vvt and stuff like that. A carbed 454 is much simpler

My installer is doing the cam swap without removing the engine.

[Korosion]

Originally Posted by MP3BOOSTED

pulling the motor isn't that hard of a task to complete. Pray could spec out a more power driven cam though i would say, I did pretty much the same setup as OP but with the vvt3 cam and being a manual car.

If i could go back i would go with a bigger cam by pray with johnson racing lifters for added security as the ls7 do tend to fail on you.

How do you like the vvt3 cam? I am still debating one keeping with the vvt2 or going with the vvt3. Do you know what the differences would be in terms of sound, power and drivability?