[Blackdevil77]

Does anybody know if the TVS will be making a 2650 blower for the 6th gen ZL1? from what I'm reading, it seems like a promising piece, TVS makes some good stuff. From the thread I saw with the whipple, it seems that at stock boost levels, it's outside of it's efficiency range, not spinning fast enough and has to be cranked up to about 15-17 lbs to get into it's optimal efficiency range. This may make a better, more modest swap.

http://www.eaton.com/Eaton/ProductsS...dex.htm#tabs-1

[Blackdevil77]

Has anybody heard anything about the 2650?

[TheRedhead]

I'm hoping there is a kit or setup coming.

Huge fan of the TVS.

[BlaqWhole]

One of the companies is bringing a 2650 to the market. I think it is Magnuson. I think they said it'll outdo the Whipple 2.9 but I doubt that since the Whipple is way bigger and a Twin Screw.

[Blackdevil77]

Originally Posted by BlaqWhole

One of the companies is bringing a 2650 to the market. I think it is Magnuson. I think they said it'll outdo the Whipple 2.9 but I doubt that since the Whipple is way bigger and a Twin Screw.

The whipple is nice, but it seems you have to really crank the boost to get it into it's efficiency range. Might be a bit too big for those with more modest goals.

[djfury05]

A bone stock ZL1 with Whipple and tune makes 125 rwhp over stock with just a couple more lbs of boost created. How is that "requiring you to really crank the boost" ?? It moves more air at less rpm and makes less heat. Not sure what more you want.

Additionally the TVS2650 is supposed to out perform the Whipple so your reasoning makes zero sense when you say you have more modest goals.

[Blackdevil77]

Originally Posted by djfury05

A bone stock ZL1 with Whipple and tune makes 125 rwhp over stock with just a couple more lbs of boost created. How is that "requiring you to really crank the boost" ?? It moves more air at less rpm and makes less heat. Not sure what more you want.

Additionally the TVS2650 is supposed to out perform the Whipple so your reasoning makes zero sense when you say you have more modest goals.

A thread here shows the boost being cranked up to 17 lbs to get that increase, that's more than a couple more pounds of boost. Stock is 9.2 lbs I believe. Anything less than that and the blower is apparently our of its efficiency range. If stock is 9 or so, I'd be happy with around 12. I'd just go the pulley route but I don't want heat soak to become more prevalent by spinning the little factory blower faster.

http://www.camaro6.com/forums/showthread.php?t=487143

As you can see, this lost a little mid-range torque but picked it back up over 5100 RPM. This is mostly due to that big Whipple being off the bottom of the efficiency map.

This was a peak gain of +35whp but a peak loss of -9wtq; however, there was a torque gain close to your shift point of approx +25wtq.
Boost started at 14psi and ended around 16psi

We were pretty eager to put the next pulley on to get this blower up into it's efficiency range. The intake has to come off to get to the tensioner for the belt swap, but other than that, you're only about 30m to move it up. As you can see below that torque band jumped up a LOT over the 3.75".

This was a peak gain of +81whp and +46wtq.
Boost started at 14* and saw a max of 17psi

As you can see, even with 17 lbs of boost, it doesn't add the claimed 125 rwhp.

[djfury05]

How about you actually go to Whipple's website and see the gains for yourself then??

[TheElementalCashew]

Originally Posted by Blackdevil77

A thread here shows the boost being cranked up to 17 lbs to get that increase, that's more than a couple more pounds of boost. Stock is 9.2 lbs I believe. Anything less than that and the blower is apparently our of its efficiency range. If stock is 9 or so, I'd be happy with around 12. I'd just go the pulley route but I don't want heat soak to become more prevalent by spinning the little factory blower faster.

http://www.camaro6.com/forums/showthread.php?t=487143

As you can see, this lost a little mid-range torque but picked it back up over 5100 RPM. This is mostly due to that big Whipple being off the bottom of the efficiency map.

This was a peak gain of +35whp but a peak loss of -9wtq; however, there was a torque gain close to your shift point of approx +25wtq.
Boost started at 14psi and ended around 16psi

We were pretty eager to put the next pulley on to get this blower up into it's efficiency range. The intake has to come off to get to the tensioner for the belt swap, but other than that, you're only about 30m to move it up. As you can see below that torque band jumped up a LOT over the 3.75".

This was a peak gain of +81whp and +46wtq.
Boost started at 14* and saw a max of 17psi

As you can see, even with 17 lbs of boost, it doesn't add the claimed 125 rwhp.

What is the issue with turning up boost to hit the efficiency area for the Whipple? In that same thread, they were running 20psi of boost and still 5000rpm from the max, while still getting manageable temperatures.

[Blackdevil77]

Originally Posted by djfury05

How about you actually go to Whipple's website and see the gains for yourself then??

How about I did... everybody did. Independent testing seems to show something different than what Whipple claims. Which do you believe?

Originally Posted by TheElementalCashew

What is the issue with turning up boost to hit the efficiency area for the Whipple? In that same thread, they were running 20psi of boost and still 5000rpm from the max, while still getting manageable temperatures.

Nothing assuming the LT4 can handle that much boost. That's far over factory, what's the safe boost limit for pump gas?

[TheElementalCashew]

Originally Posted by Blackdevil77

How about I did... everybody did. Independent testing seems to show something different than what Whipple claims. Which do you believe?







Nothing assuming the LT4 can handle that much boost. That's far over factory, what's the safe boost limit for pump gas?

I don’t know either, I was asking you out of genuine curiosity. I imagine it is known, since the LT4 has been out for several years now.

[17CamaroZL1]

I'd definitely never trust what the makers of a product claim over what user test results are.

As for the safe boost levels of the LT4, that's a good question. If you can get enough fuel to the engine for 20 psi, I'm pretty sure the engine could handle it, being fully forged, but there's only one way to find out. May require higher octane than 93 though.

[Blackdevil77]

Originally Posted by TheElementalCashew

I don’t know either, I was asking you out of genuine curiosity. I imagine it is known, since the LT4 has been out for several years now.

I'm not sure myself, gonna do some googling. I'll post back with my findings.

Originally Posted by 17CamaroZL1

I'd definitely never trust what the makers of a product claim over what user test results are.

As for the safe boost levels of the LT4, that's a good question. If you can get enough fuel to the engine for 20 psi, I'm pretty sure the engine could handle it, being fully forged, but there's only one way to find out. May require higher octane than 93 though.

Exactly, me either.

I bet the rods are the weak link, but I still think the LT4 can handle quite a bit of power. It's the fuel that seems to be the limiting factor. And that is much of the problem, could you run pump gas with an additional 8-9 lbs of boost? That's quite a bit more than stock, usually you hit the limits of pump gas after 3-4 lbs over stock in many applications. The LT4 could be different, I have no idea.

[Spulbus2013]

So once you get a big power adder where do you exactly plan to go? Honestly! It's been 4-5yrs this platforms been out (LT1/LT4) and no ones seriously supporting fueling that's affordable for the masses with serious results. Your fueling limit with Meth and cam and low side pump and all the tricks in the DI book have every one around the 750-800ish whp range, which is what the stock blower is maxing out at.

Soo why spend all this money to get another power adder that's able to push 1000+whp if u can't fuel it?

Port injection conversion is anywhere from the $8-12k+ range easily from the few shops I called on a simple procharger manifold, and I haven't seen honestly anyone running big numbers with that either (1000-1200whp+) or trapping what some of these shops suggest is 1000+whp.