Theta

Received & installed the manifold and TB yesterday. I was really surprised at just how much restriction there was even with the TB. That huge stepped lip couldn't have been helping things.

The intake looks like it needed that decent bite out of it, as well. And I don't know who put that tube there, but I'm glad you took that out.

Cores heading back to you today. Scary note - the intake manifold and TB on my car already had a film of oil after only 500 miles.

Higgs Boson

do you have a Z51?

do you anticipate having to retune the tb mm?

Theta

Yes on the Z51.

No to the tuning change. The TB remains the same size, but flow should be better due to restriction reduction.

0Fasterproms

Hey Guys,

We have been swamped here at Fasterproms with tuning all over the state of Florida and porting. It has been a while since we posted anything about our 2014 C7 Z51 M7 Corvette.

Earlier in the year, we added our Fasterproms ported intake manifold, removed the intake cover, drilled a larger hole in air box, and added a heat partition for the air box.

The car made 426 rwhp / 426 tq before the above mods and mild tune. The car made 443 rwhp / 443 tq after.

Today, we added headers, which brought us up to 454 rwhp / 460 tq, followed by E85 - which made 467 rwhp / 472 tq.

We are currently installing a camshaft and in the near future, a supercharger. We will keep you all posted on the results!

typhoon186

Today, we added headers, which brought us up to 454 rwhp / 460 tq, followed by E85 - which made 467 rwhp / 472 tq.


Attachment 47805186[/QUOTE]

Question on the E85: Did you add a ratio of E85 to you existing fuel in the car? If so, what ratio did you use and how much is safe? Or are you saying you ran mostly all E85? Since it's not a flex fuel engine, I don't understand how you can run much E85 in it. Seems it would lean out pretty fast. Can you elaborate on this?

Kracka

You just have to tune for the higher ethanol content. With its octane rating, E85 is basically a poor man's race fuel.

105+ octane for under $3/gallon.

typhoon186

Are you saying the 2014 LT1 can run 100% E85 with "just a tune"? Really? The stock and fuel pump and injectors are up to the task? Do you know this for a fact?

I'm interested in hearing what Jeremy did in this case. Did he add some amount of E85 to his premium gas or run all E85.

(edit: I noticed this above sounded a little sarcastic. Sorry was not intended that way).

LT1_E85_Corvette

awesome info!!!! this was my exact LS3 build and i put down 431 whp (e85 and all). im now confident to move forward with the same build on my C7. please let us know the new track times with the latest setup. you guys rock!

Tom Kane

Question, name of firm that does the porting. How difficult is it to remove intake manifold and re-install.

Higgs Boson

Formato is the porter.

Intake is easy, 3 of 10, to R&R. About like changing brake pads.

xp800

Shop is FasterProms and owner is Jeremy Formato. http://fasterproms.net/ And they are a CF vendor obviously. They had a ported intake/TB package deal a while ago.

The intake manifold swap isn't particularly difficult. No special tools required.

Theta's giude:

https://www.corvetteforum.com/forums...-manifold.html

I will add to Theta's tips a bit.

1) Disconnect all 8 coil plug connectors before yanking the tie-wrap push pins out of the manifold cover. Otherwise, they release sharply and can yank the wires out of the connectors if left attached.

2) There is a hidden vacuum line off the driver's side rear that is NOT shown in the repair procedure. May be Z51 only, but not sure. To access this you need to get all the exposed hoses and wire harnesses disconnected and all the manifold bolts loose. Tilt the front of the manifold up and slide it forward a bit (you will need to lift/hold the rear bolts up in their holes to do this). Carefully look around the rear right of the manifold and you will see a 90 deg. fitting with a red collar. Use a flat plastic trim tool to hold this red collar against the manifold while pulling the fitting out. It's just a press-in fitting. The red collar will want to slide out with the fitting while you pull. This locks the fitting. So holding the collar 'releases' the fitting. Trust me, this was the worst part of the job the first time until I figured it out, and that was even with some PMs to Theta before his posted procedure.

3) Once the rear line is disconnected, you can pull the manifold out. The bolts will want to catch as you're working it out, so take your time.

4) The bolts appear captive by the manifold holes. It catches the flanges of the metal sleeves. Turn the manifold upside down, and using a punch on the center of each bolt, give the punch a good whack with a light hammer. The bolt and sleeve will come right out. You will see there's just a bit of flashing that's holding the sleeve flange in the hole. Again, thanks to Theta for telling me this...

5) One of the sensors screwed into the manifold requires a triangular bit. I looked at a hardware store and never found one. I ended up using a flat blade screwdriver and worked it out slowly.

6) I bought new seals to be on the safe side, but as Theta said they can probably be reused. They are not expensive, especially for the runners.

Theta

Beat me to it!

Higgs Boson

The vacuum line is on all the cars.

If I am not mistaken, the manifold came with gaskets installed so I shipped my core back with the gaskets installed.

Which sensor needs a triangular bit? I don't recall that.

Theta

Same question here - I believe the sensor is fastened with a Torx head bolt, but never ran into a triangle on the C7.

xp800

The MAP sensor on mine had the crazy triangle screw. I wish it were a Torx! I'd offer to take a picture, but it's hidden under the manifold cover. My VIN is 17666, so I wonder if the fastener was changed at some point?

Theta

Maybe they were... wait for it........ 'screwing' with you...

/rimshot

xp800

Mine was bare, and I opted to buy new seals just to be safe rather than transfer the ones from my OEM. Jeremy told me this at the time so it wasn't a surprise.

xp800

If they were, they got what they were after:

U2Slow

Jeremy,

Over years you ported (stage 2) my 06 Z06 intake and TB and my 05 GTO intake and TB and I was always impressed with precision of your work. Cars seemed to performed better and I never had issues at all.

Will be glad to do business with you in the future again now that I have moved to Tampa and may have to stop by to say hi one of these days.

Thanks and take care
Sasa

tblu92

Jeremy----I commend you for all your hard work and sharing the honest data on your C7 intake porting--Also for your broad shoulders for taking un-informed forum criticism about your work---As a tuner I understand how so many people do that-- As I get the same thing---As a porter you open yourself to even more !!--
I do have one question about the intake porting---It concerns the tube that runs down the center if the intake just past the T-Body-- I looks like a major restriction and turbulence creator --You said that this is removed---I believe this is a PCV line----Have you noticed any change in manifold vacuum or PCV operation when this tube is removed ???---Why would GM even place it there just behind the T-Body ?---
Thanks