[2018 ZL1 HBM]

Here is the mod list that the shop and I came up with....Hoping I am not paying too much. Invoice info:

6th Gen ZL1 Stage 2 Kit
Part Description:
Green Belt
ATI Crank Pulley
1 7/8 WC 16 And Up
Freight
Jet 180 Thermostat Gm 14 And Up
Rotofab Big Gulp 17And Up ZL1
ATI Ring
Freight
LT 4 Spark Plugs
ZR1 Throttle Body
ZR1 Throttle Body Adapter
Dyno Tune 17+ Gm

Total cost I was given is $7200 installed.....Good price or bad price? How many rear wheel horse increase? This is being done at a very reputable, highly recommended tune shop......

[dbs1]

655/675. Price is...what market conditions dictate.

Call em in the morning and tell em you thought about it overnight and want the stage 2.5 (e85 sensor/tune)

[Z OH 6]

620-630whp depending on whether or not they use STD or SAE and the weather conditions on the dyno day and without knowing which lower pulley they're using. Price sounds about right for a higher end shop.

[LT4Greg]

If you are satisfied with the cost then go for it. You will get all kinds of replies here either positive or negative and if the shop is top rated then let them do the work and drive on. I think the quote they gave you is fair due to the parts and labor involved.

[SJFGTO]

Nice build! 615/635 is my guess.

[Markoz28]

Green Belt
ATI Crank Pulley $600

1 7/8 WC 16 And Up $1200
Freight

Jet 180 Thermostat Gm 14 And Up $50

Rotofab Big Gulp 17And Up ZL1 $500

ATI Ring $150

Freight
LT 4 Spark Plugs $80

ZR1 Throttle Body $300

ZR1 Throttle Body Adapter $50

Dyno Tune 17+ Gm (varies $600-1000)

So after doing the math that is $3930 just in parts. BTW all parts prices I went with the higher end cost. All of which I have seen that can be purchased for less.

Leaving $3000 and change for install. I would say its on the high side for sure.

[2018 ZL1 HBM]

I guess you have to figure that I am being charged a high mark up for the parts, as they want to make money on them and not just for the labor. I did forward this invoice to another shop, and will get an answer tomorrow.....This place is renowned and has a good rep however......Price breakdown was as follows:

Parts 4,473.89
total labor 2,332.58
shop supply 168.41

Subtotal 6974.88

Sales tax 230.87

Total 7205.75

[Corey7519]

I believe thats considered a stage 1 - all bolt ons but everyones sees things differently

[2018 ZL1 HBM]

Originally Posted by Corey7519

I believe thats considered a stage 1 - all bolt ons but everyones sees things differently

I checked with no less than a dozen speed shops, I showed them the official invoice, they all concured that this would be considered stage 2. Actual invoice:

Green belt
ZL1 damper
Kooks headers green cats
Jet 180 thermostat gm 14 up
Pulley
Roto Fab 17 up ZL1
Lt 4 spark plugs
Throttle body ZR1
AC BELT
WIDEBABD BUNG
WIDEBAND BUNG CAP
LT 5 throttle body adapter
Custom dyno tune ZL 1 17 up

[Camaro1973]

Originally Posted by 2018 ZL1 HBM

I checked with no less than a dozen speed shops, I showed them the official invoice, they all concured that this would be considered stage 2. Actual invoice:

Green belt
Zl1 damper
Kooks headers green cats
Jet 180 thermostat gm 14 up
Pulley
Roto Fab 17 up ZL1
Lt 4 spark plugs
Throttle body ZR1
AC BELT
WIDEBABD BUNG
WIDEBAND BHNG CAP
LT 5 throttle body adapter
Custom dyno tune ZL 1 17 up

Stage numbers are just a way shops categorize aftermarket mods. All of them are different. You just have basic bolt ons which would be considered stage 1, if you want to even call it that.


In my opinion:


Stage 1: Basic Bolt ons. (Headers, intake, pulleys TB, etc)

Stage 2: Basic Bolt ons, cam, heads, porting etc.

Stage 3: Basic bolt ons, cam, heads, Supercharger upgrade.
Stage 4: All of the above with addition of, meth and/or fueling upgrades.


Just makes a bit more sense this way and is easier, but thats just my opinion.

[BlaqWhole]

That seems a bit high priced for those mods to me.

[2018 ZL1 HBM]

Originally Posted by Camaro1973

Stage numbers are just a way shops categorize aftermarket mods. All of them are different. You just have basic bolt ons which would be considered stage 1, if you want to even call it that.


In my opinion:


Stage 1: Basic Bolt ons. (Headers, intake, pulleys TB, etc)

Stage 2: Basic Bolt ons, cam, heads, porting etc.

Stage 3: Basic bolt ons, cam, heads, Supercharger upgrade.
Stage 4: All of the above with addition of, meth and/or fueling upgrades.


Just makes a bit more sense this way and is easier, but thats just my opinion.

At the end of the day, these builds are just what they are, ( The sum of multiple additions ). Each shop or person can label them anyway they want. With that being said, when I gave that list to many many shops they all called that stage 2. Doesn't really matter either way, all that matters is that I added 100 rear wheel horsepower.... Truth is, for the same amount of horsepower, I'd rather do it with bolts ons, compared to getting into the engine internally for many reasons.... Warranties, ( I have an aftermarket bumper to bumper warranty, which a local speed shop said they would take care of me with) in case of mechanical failure... Would rather not change the engine foundationally....

[gotswap]

Or go with a 2650 @~$5200(wait for a sale), tune @1k = $6200 - $1500 for selling your stock supercharger and you are mid/high 4k and net just under 700WHP

[KingLT1]

Stage 1- Flex sensor tune and E85. This mod alone will make pretty much the same power as all of the parts mentioned in the OP on 93.

Stage 2- Headers, RF big gulp, 103 tb, E60

Stage 3- 2650 swap and fuel system(Port Injection or +30 injectors/lpe di pump, low side). Back to full E on 14-15psi.

Stage 4- Heads/Cam

There is no reason in 2020 to open the motor unless you are shooting for 800+ whp. Most of these packages are old methodology from when fuel and PD supercharger options were limited early in the Gen 5 days... a bigger fuel lobe cam was a must to have adequate fuel supply. Also it made more sense to use heads/cam and less boost because of the 1.74 superchargers limited efficiency. With the 2650 you can run more boost on the stock engine because it's much more efficient. So now stock engine LT4's with a 2650 swap are making as much power as H/C stock supercharger cars.