716rwhp 780rwtq What's wrong !!! C6ZR1 Graph
09-10-2014, 10:42 PM
#1
716rwhp 780rwtq What's wrong !!! C6ZR1 Graph Hey guys what's up?
We put our ZR1 on the dyno last Sunday the tune is still not done but I was wondering if there is something to check or do before we finish and spray 200shot since it's dropping 1-2psi
Here is setup 10' C6 ZR1:
1.7/8 Kooks headers ORX to Stock catback.
LPE Air Intake system (COULD THIS BE A RESTRICTION & DROPPING BOOST???)
TPiS 102mm TB.
LPE Bigger high flow Snout slightly ported.
Greg Good's fully Ported blower (Thanks KP Racing)
2.3 Upper & 14% Overdrive lower Pulley.
Lethal Performance Custom cam.
WCCH Ported & Slightly milled LS9 heads.
RPS Triple Carbon clutch.
Nitrous Outlet spray bars.
CoolerLogic H/E
ID1000 Injectors.
CCW Wheels MT 345/35/18 Tires.
Running straight 109VP Fuel , Weather is around 92f
We're seeing 18psi with slight drop to 16.5 - 17psi
Questions:
1- How much do you guys think LPE CAI is killing the setup do we need a bigger/custom intake? Is it possible this is why it's dropping boost since the belt doesn't seem to show any sign of slip.
2- How much do you think the CCW & MT Tires are eating from the power at the dyno?
3- Are the ID1000 injectors big for the setup? we're spraying 200shot.
4- From the look of the graph below how much do you think the car left in it from adjusting the A/F and adding more timing? (4 - 5.2k very rich and curve seems dropping)
5- 780RWTQ Should make a lot more HP with it right??
I'm expecting at least 770+RWHP with this I'm I asking too much?
Graph dyno A/F line is set at 11:5 A/F
The car
Any suggestions or help will be appreciated guys.
Sam
.
We put our ZR1 on the dyno last Sunday the tune is still not done but I was wondering if there is something to check or do before we finish and spray 200shot since it's dropping 1-2psi
Here is setup 10' C6 ZR1:
1.7/8 Kooks headers ORX to Stock catback.
LPE Air Intake system (COULD THIS BE A RESTRICTION & DROPPING BOOST???)
TPiS 102mm TB.
LPE Bigger high flow Snout slightly ported.
Greg Good's fully Ported blower (Thanks KP Racing)
2.3 Upper & 14% Overdrive lower Pulley.
Lethal Performance Custom cam.
WCCH Ported & Slightly milled LS9 heads.
RPS Triple Carbon clutch.
Nitrous Outlet spray bars.
CoolerLogic H/E
ID1000 Injectors.
CCW Wheels MT 345/35/18 Tires.
Running straight 109VP Fuel , Weather is around 92f
We're seeing 18psi with slight drop to 16.5 - 17psi
Questions:
1- How much do you guys think LPE CAI is killing the setup do we need a bigger/custom intake? Is it possible this is why it's dropping boost since the belt doesn't seem to show any sign of slip.
2- How much do you think the CCW & MT Tires are eating from the power at the dyno?
3- Are the ID1000 injectors big for the setup? we're spraying 200shot.
4- From the look of the graph below how much do you think the car left in it from adjusting the A/F and adding more timing? (4 - 5.2k very rich and curve seems dropping)
5- 780RWTQ Should make a lot more HP with it right??
I'm expecting at least 770+RWHP with this I'm I asking too much?
Graph dyno A/F line is set at 11:5 A/F
The car
Any suggestions or help will be appreciated guys.
Sam
.
09-11-2014, 10:39 AM
#2
The wheels and tires aren't really costing you anything in regards to power. I'm sure they are a hell of a lot lighter than stock Vette wheels. Wouldn't the stock catback be a restriction? And in my opinion, you want more injector than you need because it gives you room to grow. Any good tuner can tune the injectors properly.
09-13-2014, 03:05 AM
#3
Do you have a cam in there? You aren't carrying power uptop, which is why you're making big torque and not the corresponding HP - a common trait of positive displacement blowers, especially as they lose efficiency with more internal RPM.
I don't know how far you can realistically push a ported 2.3 to make huge power uptop. But I would think a cam would definitely help... something like this: BTR Stage III Blower Cam
I don't know how far you can realistically push a ported 2.3 to make huge power uptop. But I would think a cam would definitely help... something like this: BTR Stage III Blower Cam
09-14-2014, 12:49 AM
#5
The wheels and tires aren't really costing you anything in regards to power. I'm sure they are a hell of a lot lighter than stock Vette wheels. Wouldn't the stock catback be a restriction? And in my opinion, you want more injector than you need because it gives you room to grow. Any good tuner can tune the injectors properly.
The stock catback on the ZR1 is proven a couple of times it's good for 1100+rwhp.
Yeah I was very sure the injectors wasnt the problem since we'll need with the 200shot.
Thanks man just to make sure we're going to dyno the car again on the 19 stock wheels form C6Z06 to make sure the MT Drag Radials are not taking power.
Do you have a cam in there? You aren't carrying power uptop, which is why you're making big torque and not the corresponding HP - a common trait of positive displacement blowers, especially as they lose efficiency with more internal RPM.
I don't know how far you can realistically push a ported 2.3 to make huge power uptop. But I would think a cam would definitely help... something like this: BTR Stage III Blower Cam
I don't know how far you can realistically push a ported 2.3 to make huge power uptop. But I would think a cam would definitely help... something like this: BTR Stage III Blower Cam
Yes we're ruuning a custom cam from Lethal which I'm sure it's not the problem since lethal tested in a couple of ZR1s with similar setups and all made between 760-810rwhp depends on the boost and fuel.
I'm sure leaning the rich area will gain some good amount of mid range power but the car has some much TQ now I'm more concerned about peak HP power to be honest 66-6800rpm
I'll keep you guys posted what we find.
09-14-2014, 08:17 AM
#7
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Could it be you're just out of blower? I'm no blower expert but common sense would tell me if the boost is laying over at high rpm then it's not pumping enough to feed the engine....thus over working the entire deal.
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09-14-2014, 08:28 AM
#8
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If your working w/ KP racing you're in pretty good hands. They have produced the highest HP ZR1 to date at over 1100 wheel (Rocky's White ZR) on the stock short block. I am with Jake, the Tooley stage 3 ZR1 cam he has would be a great setup as it will deliever continued HP carry throughout the curve. Everything else you've done is pretty spot on, you may find your stock cat back at your HP level is a serious restriction. I know it's not the same platform or power delivery, but on my NA 434 in my C5Z the stock TI cat back was a 50HP (yes that is correct 50HP) restriction during my build.
09-14-2014, 12:06 PM
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Looks like tuning issues to me, the way the run dips at 4000rpm and never recovers. I'd guess the combination of being pig rich in that area and maybe some timing that needs adjustment. Can you log the run and look at timing, KR, etc?
10-06-2014, 02:50 PM
#12
wouldn't a 2.3 blower be a little to small at 18psi on that setup I would imagin it would not be very efficient on a 6.2. could be the reason for the boost drop in higher rpms its just simply sucking in more air than the blower can produce at that rpm
10-06-2014, 02:53 PM
#13
you also got to get that air out of the exhaust and engine also. quick way to rule out the cat is to just disconnect it and do a dyno pull and read boost, it dosnt get mentioned much in the aftermarket world, but a cat is basicly like a furnace and requires certain air fuel ratio to STOKE THE FIRE in a sense. they get damaged with excessive fuel and can clog. not sure how long you been running on the rich tune but its something to consider. IMO I would just remove cats and let it breath, chances of you passing emissions is slim to none anyways
10-15-2014, 10:34 PM
#15
Hey guys
Red Devil C6 ZR1 by VENOM Racing (Check us out on facebook)
998rwhp 1075rwtq on 200shot.
The Nitrous numbers are great very happy with the gains but we're still checking for the issue with blower only numbers it should be between 770-800rwhp with the setup we have.
Full Boltons / Upper/lower / Ported blower H/C 16-18psi on 109VP Fuel.
with Nitrous Outlet spray bars 200shot C16 Fuel
We're still not sure if going to 4.5 will help the setup or not over the LPE CAI.
Huge Thanks to:
Texas Speed and Performance, LTD
Lethal Performance
CCW Forged Wheels
Nitrous Outlet
KP Racing
MC-PERFORMANCE
Too bad my brother & I weren't there but as per the owner the car does 50-150mph :woohoo:
very fast I'm looking forward for the runs in this beast.
:thumbs:
Sam.
.
Red Devil C6 ZR1 by VENOM Racing (Check us out on facebook)
998rwhp 1075rwtq on 200shot.
The Nitrous numbers are great very happy with the gains but we're still checking for the issue with blower only numbers it should be between 770-800rwhp with the setup we have.
Full Boltons / Upper/lower / Ported blower H/C 16-18psi on 109VP Fuel.
with Nitrous Outlet spray bars 200shot C16 Fuel
We're still not sure if going to 4.5 will help the setup or not over the LPE CAI.
Huge Thanks to:
Texas Speed and Performance, LTD
Lethal Performance
CCW Forged Wheels
Nitrous Outlet
KP Racing
MC-PERFORMANCE
Too bad my brother & I weren't there but as per the owner the car does 50-150mph :woohoo:
very fast I'm looking forward for the runs in this beast.
:thumbs:
Sam.
.