NoOne

Does that mean that GM has hinted around that it will only supply tuning options to those that are CARB/50 state certified?

DOUG @ ECS

Hi Rune, yes they will be as low as possible into the duct, it doesn't look it in the picture but they do sit out of the engine bay and fully in the incoming air stream.

It has been hinted yes, but I can't say that for certain. Either way, we want it 50 state legal.

chuntington101

nothing wrong with stepped log if don’t right (conical is better though)! See the below link for some interesting info. Also easier to cast in stainless / inconnel!

https://www.litchfieldmotors.com/nis...anifold-turbo/

Shinobi'sZ

My guess is if you have the space or there is reasonable space to service plugs, and install, is that you will end up with cast stainless manifold. Whatever it ends up being I'm sure it will be a great product. But as you know with CARB and obtaining and EO number it is specific so you would end up needing a different CARB or EO number for a different manifold.


No need and never said there was anything wrong with a stepped log, it is just not as good as a header with merge at the flange...proven design in endurance racing over all else. However all of my turbo diesels whether it be a Navstar or Duramax use logs and they will last 100k's of miles.

chuntington101

If you look at the link I posted and read the ‘Design’ page they go into a lot of detail around the different designs tested before coming up with the chosen one. Seems some F1 teams are using similar designs as well now (guessing more to do with packaging than anything).

The bad bad thing about a header design will be heat! It could turn the engine compartment into an oven really easily! Logs tend to be less hot as they tend to be 1) thicker material, 2) significantly less surface area, 3) more compact / more space between important bits & 4) easier to insulate.

Obviously you can make a header system work but if you want a crack free design that’s as durable as f*ck you really can’t beat a log design.

Shinobi'sZ

I speak more from experience than I do opinion in this matter. Not that I don't enjoy or appreciate learning about different things I have more real world development and use than most on this board. Given my involvement (my design with shout out to Jim Hall for the Halltech kit as inspiration) of the C5 PTK kit, which included having to come up with mitigating heat with the 1 7/8" primaries, header merge collector into T4 flange all being 2" from the hood. I ended up with a kit that I drove in California summer heat 105-110* for 5 hours to the last A&A BBQ (Dec 2005 Vette Mag), plus 12K miles before I sold the car with NO heat related failures of any underhood components. Car went to LA in 2013, and is now in Oregon still running. Prior to the PTK kit my C5Z was the test mule for all of the R&D work with TTi. Which ultimately led to Phil redesigning to the TTiX kit. That said I'm pretty familiar with all of the real world designs and engineering benefits...especially being somebody that provides engineering oversight as a career for aircraft, trains, and highways.

Logs do create heat and hot spots which can lead to other thing like warping and different effects with exhaust pulses as they combine pulses along the log before exiting. That's the disadvantage to them really. I think Doug has pointed out that another option might be pursued in the future for higher hp applications, obviously a log manifold that is capable of 1000hp, saves space, and is easier to mitigate heat is a very attractive option. But there are engineering facts and engineering opinions, engineering fact is a log manifold is not as efficient or as good as a lt header merge collector, if it were it would be used in endurance racing, but it's not. Engineering opinion is that a stepped log is likely the best design for the C8 given the engine compartment and surrounding space.

chuntington101

@Shinobi'sZ totally agree that a equal length header with a proper collector is the best solution in terms of flow and overall performance. However haven’t seen many ‘kits’ that use them in the V8 world.

Even the import guys guys tend to run collectors with very steep angles between runners and short collectors. Maybe less of an issue compared to NA though (hotter and fender exhaust gas flows differently???)?

Timz16

Doug, does it make any difference with your kit to order the z51 package with a little extra cooling, or not? Thanks

DOUG @ ECS

Our street kit will fit all models, Z51, non Z51, convertibles, and will not take up any of the trunk or frunk space.

Thanks for your interest!

Timz16

Thanks for your answer! However, have you noticed whether the z51 cools down the engine any quicker with your kit? Or is it not worth spending the $6k for that? Thanks!

DOUG @ ECS

Without tuning I don't even know what kind of power it will make let alone temps.

NoOne

I imagine you don't want to sell it like this but have you done some initial testing with a piggy back?

Racer X

There are a lot of other reasons to get the Z51 package besides the extra cooling.

Will you be driving at Max power for minutes at a time?

What will you be doing with the car?

DOUG @ ECS

Others are doing that, the youtube crowd is just winging it, but we are a manufacturer and unless we are going to sell it that way in masses, which I do not see many people being OK with their new car not passing inspection, then we will not waste our time in that direction.

So it's just a painstaking waiting game at the moment. We plan on making a supercharger kit as well, but we stopped going forward until the TT kit is sellable. No point in having two FI kits we can't sell.

NoOne

I know they may not sound like the best solution but Burger has got it down pat. On my S5 I run E35, maxed out the boost on the turbo(before it turns into a heat pump) and it drives just like stock. They have people running bigger turbo's, meth control, etc...the only discernable difference and even they admit they can't fix it if your pay attention the idle is just a hair off.

Then again I don't have to worry about emissions or any of that.

They did finally crack the Siemens ECU though but I haven't followed that much because the JB4 works so well.

Timz16

occasional quarter mile runs at the strip. But I am in Louisiana swamp heat and humidity. Past superchargers needed cool down times between passes.

Racer X

I would do it, plus the Z51 has slightly steeper gears.you might try an electric leaf blower to get extra flow across the radiator, and maybe misting the radiators.

one of the disadvantages of a blower is they produce more heat for the same power to the crank as the blower requires HP to drive the blower.

Raven911

Doug.......so your saying your kit will definitely fit in the C8 HTC ? Have you installed one in a HTC yet? How much more difficult is the install vs. the coupe?

Thanks!!!

DOUG @ ECS

Yes it will fit, we didn't design the kit by sticking turbo's in there and seeing what fit, this is a 100% engineered CAD drawn kit that was completely designed before we even had the car.

Display333

I agree 1000 percent!!!

can this much work , money, effort, unreliabilty, warranty voiding and all the rest possibly be worth it??? what are you going to gain? is there an true upside? who are you going to "beat"... and do you get paid for that?

where can you use quicker that 3.0 seconds to 60 mph... or higher big end than 185 ish?

if you really want something quicker for some reason... shouldnt you just buy a real race car for 1/2 the money... and not ruin a beautiful corvette?

just askin....