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Search: Posts Made By: arghx7
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Forum: C7 Tech/Performance
12-23-2013, 09:29 PM
Replies: 47
Views: 33,735
Posted By arghx7

GM put many many hours into engine dyno...

GM put many many hours into engine dyno durability schedules in addition to vehicle testing. At this point, all we can do is trust that they worked out the bugs before it went into production.

...
Forum: C7 Tech/Performance
11-15-2013, 09:53 AM
Replies: 113
Views: 10,723
Posted By arghx7

We know you're swapping around headers, but can...

We know you're swapping around headers, but can you describe the intake and [the rest of] the exhaust system you're using on the engine dyno? How do they compare to systems used on the vehicle in...
Forum: C7 Tech/Performance
11-10-2013, 01:01 AM
Replies: 19
Views: 2,329
Posted By arghx7

I agree. If you plan to delete active fuel...

I agree. If you plan to delete active fuel management or disable it when you tune the car, great. Go ahead and take that valve out. But if you're going to stay with the 4 cylinder mode, why get...
Forum: C7 Forced Induction/Nitrous
10-30-2013, 03:54 PM
Replies: 12
Views: 7,894
Posted By arghx7

If anyone's done it, and I'm sure at least...

If anyone's done it, and I'm sure at least somebody somewhere has attempted it on some engine, it's not been widely publicized. From the perspective of maxing out the fuel system, I don't think it...
Forum: C7 Tech/Performance
10-26-2013, 05:10 PM
Replies: 9
Views: 2,359
Posted By arghx7

so stock tires?

so stock tires?
Forum: C7 Tech/Performance
10-25-2013, 11:16 AM
Replies: 21
Views: 5,799
Posted By arghx7

Cam swaps are uncommon on other DI engines partly...

Cam swaps are uncommon on other DI engines partly because there's less benefit to be gained. Unless I overlooked one, no other DI engine in production has fixed valve overlap like the Gen V. They...
Forum: C7 Tech/Performance
10-24-2013, 09:23 PM
Replies: 24
Views: 2,075
Posted By arghx7

That's 240 crank angle degrees of injection time,...

That's 240 crank angle degrees of injection time, presumably with SOI of around 320... should give EOI of ~80 BTDC. So that's actually pretty good headroom in terms of injection timing window.
...
Forum: C7 Tech/Performance
10-24-2013, 08:48 PM
Replies: 21
Views: 5,799
Posted By arghx7

I've posted about this in the Advanced section of...

I've posted about this in the Advanced section of a certain popular forum for LSx engines, but I'll repost some of that here with some additional detail.

To simplify, without port injectors...
Forum: C7 Tech/Performance
10-22-2013, 04:15 PM
Replies: 24
Views: 2,075
Posted By arghx7

Well, the injector flow rate and spray pattern...

Well, the injector flow rate and spray pattern were designed for 9000rpm from scratch for those engines. Realistically, considering there are a lot of high horsepower modded turbo DI engines running...
Forum: C7 Tech/Performance
10-21-2013, 04:40 PM
Replies: 34
Views: 5,350
Posted By arghx7

Sounds like the old "gross" horsepower numbers...

Sounds like the old "gross" horsepower numbers from the 60s.
Forum: C7 Tech/Performance
10-21-2013, 04:19 PM
Replies: 24
Views: 2,075
Posted By arghx7

If you don't care about fuel impinging on the...

If you don't care about fuel impinging on the cylinder wall, piston crown, open intake valve, etc, and you don't care about throwing it out the exhaust on a high overlap cam, the DI isn't much of an...
Forum: C7 Tech/Performance
10-21-2013, 04:10 PM
Replies: 49
Views: 16,521
Posted By arghx7

Currently, all US certification fuel is E0. ...

Currently, all US certification fuel is E0. Upcoming Federal Tier 3 certification fuel is E10. Therefore it makes sense they would switch over now.



Allowable injection time depends on...
Forum: C7 Tech/Performance
10-20-2013, 08:33 AM
Replies: 49
Views: 16,521
Posted By arghx7

Thanks for the post. Can we get a screenshot of...

Thanks for the post. Can we get a screenshot of the VVT tables ?
Forum: C7 Tech/Performance
10-18-2013, 06:39 AM
Replies: 76
Views: 11,675
Posted By arghx7

Are you running a stock ECU that you've gotten to...

Are you running a stock ECU that you've gotten to play nice in an engine dyno environment?
Forum: C7 Tech/Performance
10-16-2013, 07:06 PM
Replies: 10
Views: 2,753
Posted By arghx7

You can't dial in overlap with the Gen V cam...

You can't dial in overlap with the Gen V cam phaser.
Forum: C7 Tech/Performance
10-10-2013, 09:47 PM
Replies: 21
Views: 7,790
Posted By arghx7

Somebody with HP Tuners' LT1 stuff should post...

Somebody with HP Tuners' LT1 stuff should post the stock cam phasing map.
Forum: C7 Tech/Performance
10-10-2013, 09:46 PM
Replies: 99
Views: 28,115
Posted By arghx7

It's fast to market because you're the beta...

It's fast to market because you're the beta tester.
Forum: C7 Tech/Performance
10-10-2013, 09:44 PM
Replies: 6
Views: 1,619
Posted By arghx7

Sure, but this engine has a significantly...

Sure, but this engine has a significantly different head design due to the reversed valve positions and high swirl of the stock system. It's not an SBC or an LS1.
Forum: C7 Tech/Performance
10-10-2013, 03:55 PM
Replies: 6
Views: 1,619
Posted By arghx7

So these heads, which are already for sale, were...

So these heads, which are already for sale, were designed only on a flow bench with no performance data from a running engine taken into consideration?
Forum: C7 Tech/Performance
10-10-2013, 03:53 PM
Replies: 99
Views: 28,115
Posted By arghx7

So you've never tested them on a live engine and...

So you've never tested them on a live engine and they're already for sale?
Forum: C7 Tech/Performance
10-09-2013, 10:25 AM
Replies: 64
Views: 10,559
Posted By arghx7

I'm a little confused as to what you are...

I'm a little confused as to what you are referring to here, but allow me to point out that the Gen V heads, both in truck and car/Corvette applications, are very different from the Gen IV. Gen V has...
Forum: C7 Tech/Performance
10-06-2013, 10:05 AM
Replies: 10
Views: 2,451
Posted By arghx7

I'm wondering how much adjustment of torque...

I'm wondering how much adjustment of torque transfer the unit has. Does it just fully lock and fully unlock (ON or OFF)? Or can it also continuously vary the amount of torque going to each wheel,...
Forum: C7 Tech/Performance
10-04-2013, 10:33 AM
Replies: 109
Views: 10,116
Posted By arghx7

I realize I'm not going to change any minds here,...

I realize I'm not going to change any minds here, but maybe for entertainment's sake...



On a new car that's hard to say without running the test cycles. If it only affected WOT, then that's...
Forum: C7 Tech/Performance
10-03-2013, 02:23 PM
Replies: 109
Views: 10,116
Posted By arghx7

Of course. I agree. And what you achieve from...

Of course. I agree. And what you achieve from doing an individualized tune doesn't somehow mean that GM's factory calibration robbed everyone of the horsepower they were supposed to have.
...
Forum: C7 Tech/Performance
10-03-2013, 11:18 AM
Replies: 109
Views: 10,116
Posted By arghx7

Yeah it's not always about "good tune" vs "bad...

Yeah it's not always about "good tune" vs "bad tune." Does the calibration meet the requirements of the application? When you take your car to a shop and they use HP Tuners or whatever, the...
Showing results 1 to 25 of 43
 
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