ZL1 Pulley & Tune Projected HP/TQ?

[NYCSRTATE]

Just thinking out loud.

Pulley, tune, long tubes how much are they leaving on the table for us to play with on the ZL1?

How much more will be able to get out of the LSA by upping the boost and getting the engine to breathe better?

[jayman]

I'm guessing by looking at the lsa in the CTS-V that with pulleys, tune, exhaust you should be able to make 550+ to the wheels. Add a cam and larger injectors to that and you will easily be 600+

[BiggFoot]

Best I can tell you are only hp limited by $$$ and how much risk you are willing to take before detonation occurs to the destruction of engine internals.

Trust me I am no export on the matter but my investigatons would tend to show that once you begin pushing 700 RWHP, some serious consideration should be given to race fuel which is consistent in octane and contaminant free. Additonally, race fuel allows the tuner flexibility to tweak some fine points providing additional protection against detonation.

Chew up the meat and spit out the bones.

[hognutz]

I think you can go up about 3psi without changing much. headers and intake are not hard.

So I mean pumping the car up to 625-650bhp should not be hard or too expensive and could probbbaly be done with exhaust intake or pulley and tune.

I read some posts on CTS-v forums adding longtubes and pulley sometimes people did not end up with the same boost numbers as without.

[ZL WON]

Originally Posted by hognutz

I think you can go up about 3psi without changing much. headers and intake are not hard.

So I mean pumping the car up to 625-650bhp should not be hard or too expensive and could probbbaly be done with exhaust intake or pulley and tune.

I read some posts on CTS-v forums adding longtubes and pulley sometimes people did not end up with the same boost numbers as without.

When you open up the exhaust, as in adding headers or free flow exhaust, you loose boost. That's why people with CTS-Vs and ZR1s are loosing power. You have to compensate by changing out the pulleys. What I typically see when I modify ZR1s or any other supercharged build I do, I see at the most a 2lb loss in boost by adding headers and exhaust. If this is done to the ZL1 that will put the car at 8lbs of boost. I run my ZR1 at 16lbs. Anything over that, you'll have to run race gas. On my Escalade and Denali GMC truck I run 10lbs of boost and use the LS9 camshaft. My plan for my ZL1 is to mimic what I did for my ZR1, which is CNC'd heads, cam, upper and lower pulley, headers, upgraded after cooler and heat exchanger, upgraded supercharger coolant pump, one stage colder spark plugs and a few other tricks. I'll also add a 10-rib belt conversion to the ZL1 as well to prevent any belt slippage. I'll have all this done in about two weeks after receiving the car, as soon as we get our baseline RWHP number. I'll put the entire build on Camaro5.

[hognutz]

Originally Posted by ZL WON

When you open up the exhaust, as in adding headers or free flow exhaust, you loose boost. That's why people with CTS-Vs and ZR1s are loosing power. You have to compensate by changing out the pulleys. What I typically see when I modify ZR1s or any other supercharged build I do, I see at the most a 2lb loss in boost by adding headers and exhaust. If this is done to the ZL1 that will put the car at 8lbs of boost. I run my ZR1 at 16lbs. Anything over that, you'll have to run race gas. On my Escalade and Denali GMC truck I run 10lbs of boost and use the LS9 camshaft. My plan for my ZL1 is to mimic what I did for my ZR1, which is CNC'd heads, cam, upper and lower pulley, headers, upgraded after cooler and heat exchanger, upgraded supercharger coolant pump, one stage colder spark plugs and a few other tricks. I'll also add a 10-rib belt conversion to the ZL1 as well to prevent any belt slippage. I'll have all this done in about two weeks after receiving the car, as soon as we get our baseline RWHP number. I'll put the entire build on Camaro5.

yeah the post I read was a two very similar cars and the hp #'s were pretty similar but the car with longtubes had less 2lb's of boost they had the same pulley kit as the car without longtubes. they bough the pulley kit then threw the headers on and dyno'd the car I don't think they relized there would be a boost loss.

As long as you deal with a place that understands you whole mod list I am sure this is a non issue.

I don't think I will go near as far as you are going. I would like to get the strait line speed back to the Z06 I am selling to buy this car though. My wife will get angry at me if my penis shrinks in size cause my new car is slower than my old car.

[Shurenuff]

Originally Posted by ZL WON

When you open up the exhaust, as in adding headers or free flow exhaust, you loose boost. That's why people with CTS-Vs and ZR1s are loosing power. You have to compensate by changing out the pulleys. What I typically see when I modify ZR1s or any other supercharged build I do, I see at the most a 2lb loss in boost by adding headers and exhaust. If this is done to the ZL1 that will put the car at 8lbs of boost. I run my ZR1 at 16lbs. Anything over that, you'll have to run race gas. On my Escalade and Denali GMC truck I run 10lbs of boost and use the LS9 camshaft. My plan for my ZL1 is to mimic what I did for my ZR1, which is CNC'd heads, cam, upper and lower pulley, headers, upgraded after cooler and heat exchanger, upgraded supercharger coolant pump, one stage colder spark plugs and a few other tricks. I'll also add a 10-rib belt conversion to the ZL1 as well to prevent any belt slippage. I'll have all this done in about two weeks after receiving the car, as soon as we get our baseline RWHP number. I'll put the entire build on Camaro5.

Very much looking forward to following your progress

[ZL WON]

Originally Posted by hognutz

My wife will get angry at me if my penis shrinks

Just do circles

[Rice Killer]

Originally Posted by ZL WON

Just do circles

Who wants a helicopter ride, haha!

[ADM PERFORMANCE]

Originally Posted by jayman

I'm guessing by looking at the lsa in the CTS-V that with pulleys, tune, exhaust you should be able to make 550+ to the wheels. Add a cam and larger injectors to that and you will easily be 600+

Your right in line..

We are starting a build for GM HIGHTECH on monday that is our stage 2 setup.LS9 Cam,Thermostat,Ported Throttlebody,Intake,Ported Throttlebody,.Ported Snout,2.55 upper pulley,63lb injectors.

Very Basic build for us and will make 590 rwhp or 110 over stock to the tires.

Look for the article about the time the ZL1 hits the market.

We also have 1 we are finishing tommorow that will make 650-670 to the tires that has more boost,Larger Cam,Lower compression,Headers.

I will post the build under forced induction on this one.

[MrDew]

so, what are we looking at if we just do the pulley/tune?
Or is this something y'all would not recommend?

[ADM PERFORMANCE]

Originally Posted by MrDew

so, what are we looking at if we just do the pulley/tune?
Or is this something y'all would not recommend?

2.55 PULLEY and tune will net you 40-45 rwhp on ctsv.

[mlee]

Originally Posted by ADM PERFORMANCE

2.55 PULLEY and tune will net you 40-45 rwhp on ctsv.

Is belt slip an issue with ctsv and this pulley?

[2012ZL1]

How much will the stock bottom end take safely before it becomes a problem?