Who's running the Kong 2650?

[sweet99ss]

Looking to see who's running the Kong 2650 blower and with what pulleys, engine combo's, ect ect. Post up if you running a Kong blower with all info you can!

[quinthawk]

I just added a Kong 2650 to my ZL1 and had it tuned by Jannetty. Before I had
the stock 1900 with Ted's 125 package plus dsx flex fuel sensor, aux pump and 9.55 (23%) pulley. I had about 13-14 psi. I ran 10.8s at 131. After the adding the 2650, I went to a 3.5 upper (stock is 3) and went to a dsx 9.06 lower. A lot less pulley than on the 1900. I hit almost 17 psi with the 2650. It has been really hot in Iowa. With cooler weather I might be higher than 17. I have not been back to the track yet.

[Scotty D]

Originally Posted by quinthawk

I just added a Kong 2650 to my ZL1 and had it tuned by Jannetty. Before I had
the stock 1900 with Ted's 125 package plus dsx flex fuel sensor, aux pump and 9.55 (23%) pulley. I had about 13-14 psi. I ran 10.8s at 131. After the adding the 2650, I went to a 3.5 upper (stock is 3) and went to a dsx 9.06 lower. A lot less pulley than on the 1900. I hit almost 17 psi with the 2650. It has been really hot in Iowa. With cooler weather I might be higher than 17. I have not been back to the track yet.

What did she make more power wise from the old set up?

[quinthawk]

Here is a chart I looked at for some guidance


Upper Dia. Lower Dia. Pulley Ratio KONG GM LSA Equiv.
LSX Concepts - 7.950 10 Rib Lower Crank Pulley

3.25 7.95 2.446 -6% 34%
3 7.95 2.650 2% 42%
2.75 7.95 2.891 11% 51%
2.625 7.95 3.029 16% 56%





LSX Concepts - 12.5% Overdrive 8.950 10 Rib Lower Crank Pulley

3.25 8.95 2.754 6% 46%
3 8.95 2.983 15% 55%
2.75 8.95 3.255 25% 65%
2.625 8.95 3.410 31% 71%

[quinthawk]

Originally Posted by Scotty D

What did she make more power wise from the old set up?

I have not dynoed my car. It has been remotely tuned
by Jannetty.

[blake-b]

I have a ZR1 with the 2650 so not apples to apples. I went with the smallest (2.4) pulley. I flatline the kpa at 255 which is 23.x lbs.

I should be making 1050whp or so. Everyone adding a 2650 to their ZR1 seems to be adding at least 130whp even going with a bigger pulley than the OEM blower (e.g. going from a 2.35 LS9 to a 2.625 2650 pulley).

Car is actually apart at the moment so I haven't had a chance to dyno it.

A good thing about the Kong 2650 is it is already max effort. There is no porting to do to it. It won't gain anything and will only void the warranty.

[sweet99ss]

Originally Posted by quinthawk

I just added a Kong 2650 to my ZL1 and had it tuned by Jannetty. Before I had
the stock 1900 with Ted's 125 package plus dsx flex fuel sensor, aux pump and 9.55 (23%) pulley. I had about 13-14 psi. I ran 10.8s at 131. After the adding the 2650, I went to a 3.5 upper (stock is 3) and went to a dsx 9.06 lower. A lot less pulley than on the 1900. I hit almost 17 psi with the 2650. It has been really hot in Iowa. With cooler weather I might be higher than 17. I have not been back to the track yet.

Damn that's interesting. Mine is a stock lsa engine with headers only right now. Stock LSA crank pulley and I went with the 3" pulley. Wonder how much boost it will make?

[quinthawk]

Originally Posted by sweet99ss

Damn that's interesting. Mine is a stock lsa engine with headers only right now. Stock LSA crank pulley and I went with the 3" pulley. Wonder how much boost it will make?

With the pulley change I made, I effectively went from a 23% overdrive
on the 1900, to a 5% on the 2650. And gained 3-4 psi. I would think you
would be around 14-15?

[quinthawk]

Originally Posted by sweet99ss

Damn that's interesting. Mine is a stock lsa engine with headers only right now. Stock LSA crank pulley and I went with the 3" pulley. Wonder how much boost it will make?

Look at the chart I posted above.

A 3.0 upper pulley with a 7.95 lower pulley, would be a 2% overdrive
on the 2650 and the equivalent of a 42% overdrive(approximately a 2.55 upper/9.55 lower) for psi on the 1900. I think the
stock lsa balancer is 7.8, so it would be close to this.

[RobZL1]

With the equivalent of 42% overdrive on a 1900, that's a LOT of air to try to stuff through the stock valve events... you'll have lots of "boost"... and by "boost", I mean heat. Get a cam in that sucker and a 3.5" pulley.

[quinthawk]

Originally Posted by RobZL1

With the equivalent of 42% overdrive on a 1900, that's a LOT of air to try to stuff through the stock valve events... you'll have lots of "boost"... and by "boost", I mean heat. Get a cam in that sucker and a 3.5" pulley.

My ait2 has been the same or slightly less than when I had the 1900, even though I have more boost. Before I add a cam I need to see what my times are at the track. I don't want to go below a 10.00 or I will have to add a cage, etc.