[Vivid_O_1LE]

Originally Posted by Nilly Welson

The 7th Gen with be the all electifried E-Maro SS. It will come with the LT2 Manifold. I was told this by a friend who's cousin works for GM.

This post made my brain hurt.

[STEVE41]

Originally Posted by 6spdhyperblue

Right now I am running the LT2 with a 95mm tb and a rotofab on the ‘22. It’s untuned and runs great. .

does your cruise control still work ok with that 95mm TB untune? thanks

[6spdhyperblue]

Originally Posted by STEVE41

does your cruise control still work ok with that 95mm TB untune? thanks

Yes it worked ok on this car

[6spdhyperblue]

Tested this over several hundred miles.

Minor sanding of the cover has show no rubbing on the hood. This has been over approx 700 miles. Plenty of shenanigans, launches and hard turning etc. the pink nail Polish is untouched.

[Matos1LE]

Hate to bump a thread, but is there a consensus on what bolts we should run with the LT2 manifold on our cars? I know the LT1 manifold bolts are GM (12575384) and they run a couple bucks each. I found the LT2 bolts after some digging, and it seems to be GM (11602425) but they are asking like $18 per bolt. Have the LT1 bolts held up fine for you guys in the long term?

[6spdhyperblue]

Went to the track today to try the c8 lt2 cam timing. Seems promising and will get on a dyno to confirm if all or some picks up while using the lt2 intake manifold.

[lt4camaro]

Originally Posted by 6spdhyperblue

Went to the track today to try the c8 lt2 cam timing. Seems promising and will get on a dyno to confirm if all or some picks up while using the lt2 intake manifold.

Good info to pass on for sure.

[6spdhyperblue]

Yeah there’s a chance the manifold changes the pressure wave/ram effect and might be optimized with the the intake valve set to this timing. Fingers crossed

[Essmotorsports]

Originally Posted by 6spdhyperblue

Went to the track today to try the c8 lt2 cam timing. Seems promising and will get on a dyno to confirm if all or some picks up while using the lt2 intake manifold.

I'd be more curious on the bottom end of the table. The upper end is less advanced than stock Lt1 but that makes sense since the LT2 cam is slightly bigger. But looks as if they start advancing the cam way sooner then the LT1. Wonder if there is any low end gains to be had?

[6spdhyperblue]

Originally Posted by Essmotorsports

I'd be more curious on the bottom end of the table. The upper end is less advanced than stock Lt1 but that makes sense since the LT2 cam is slightly bigger. But looks as if they start advancing the cam way sooner then the LT1. Wonder if there is any low end gains to be had?

Unfortunately I didn’t go with the auto. I ran the m6 so not as consistent as an auto. I had the ported lt1 on there for about 2 weeks and don’t like it. Ordered another lt2 and shaved it. I need to stop wasting hours of my life prepping those lol. So yeah running the lt2 on my car again. Much happier. I am running the throttle body directly on the manifold now and the o ring is cut out of it this time.

Yeah I can’t tell on the low end. It might be softer but the butt dyno isn’t reliable. The car 60ft better and ran 121.5 in the heat no skinnies. The time in the sig was much much better air.

I believe the intake side of the lt2 cam is unchanged. The cam timing is different on the c7 vette, with the same engine as us, so I have to believe the exhaust manifolds does impact cam timing too. The l86 is different too but have a different intake. It would really be nice if we can find another tenth and mph here.

I’m busy for the next 2 weeks but just quoted an hour of dyno time. I will try to get that to happen before the fall.

[6spdhyperblue]

@kinglt1 or other tuning gurus, does more maf lb/min or deeper in the hz mean more hp when playing with cam timing? The ecm torque figures are showing 5+ more with the new cam timing but less lb/min and cylairmass at the lower rpm. Not sure if there’s anything reliable there

[Mountain]

Originally Posted by 6spdhyperblue

Unfortunately I didn’t go with the auto. I ran the m6 so not as consistent as an auto. I had the ported lt1 on there for about 2 weeks and don’t like it. Ordered another lt2 and shaved it. I need to stop wasting hours of my life prepping those lol. So yeah running the lt2 on my car again. Much happier. I am running the throttle body directly on the manifold now and the o ring is cut out of it this time.

Yeah I can’t tell on the low end. It might be softer but the butt dyno isn’t reliable. The car 60ft better and ran 121.5 in the heat no skinnies. The time in the sig was much much better air.

I believe the intake side of the lt2 cam is unchanged. The cam timing is different on the c7 vette, with the same engine as us, so I have to believe the exhaust manifolds does impact cam timing too. The l86 is different too but have a different intake. It would really be nice if we can find another tenth and mph here.

I’m busy for the next 2 weeks but just quoted an hour of dyno time. I will try to get that to happen before the fall.

The intake cams are the same between LT1 an LT2. The exhaust cams are very slightly different, with the LT2 getting +1mm in lift compared to the LT1.

Something interesting that I noted in my Camaros OE tune file is that the manifold volume is listed as 13.42L (Speed Density>Dynamic Airflow tab). The official word from GM is the LT1's intake manifold volume is 11.1L and the LT2 is 14.1L.
[I guess that calculation is considering the manifold plenum volume+intake manifold runners+runners to the valve]

[OB0001]

Originally Posted by Matos1LE

Hate to bump a thread, but is there a consensus on what bolts we should run with the LT2 manifold on our cars? I know the LT1 manifold bolts are GM (12575384) and they run a couple bucks each. I found the LT2 bolts after some digging, and it seems to be GM (11602425) but they are asking like $18 per bolt. Have the LT1 bolts held up fine for you guys in the long term?

lt1 bolts are fine about 10 1/4 mile passes no problems

[lt4camaro]

Originally Posted by Matos1LE

Hate to bump a thread, but is there a consensus on what bolts we should run with the LT2 manifold on our cars? I know the LT1 manifold bolts are GM (12575384) and they run a couple bucks each. I found the LT2 bolts after some digging, and it seems to be GM (11602425) but they are asking like $18 per bolt. Have the LT1 bolts held up fine for you guys in the long term?

Used the LT1 intake bolts, my intake has been on the car 2 years and 15000 miles with no problems.