do these dyno numbers seem low?
Thread Starter
Instructor
Joined: Apr 2011
Posts: 132
Likes: 0
From: Indianapolis IN
do these dyno numbers seem low?
I have a 2001 Z06 with the following mods:
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
Procharged F1X 7.18 @ 197
Joined: Feb 2002
Posts: 2,322
Likes: 8
From: Staten Island NY
St. Jude Donor '09-'10-'11
I have a 2001 Z06 with the following mods:
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
You are not that far off with 525. You mentioned a no-name IC. Is it a cheap or poorly constructed unit? Could be causing restriction.
Thread Starter
Instructor
Joined: Apr 2011
Posts: 132
Likes: 0
From: Indianapolis IN
On a side note, I was happy with the torque numbers (512.4).
Pro
Joined: Sep 2004
Posts: 524
Likes: 0
From: (<---~ NOVA ~--->) E \ LUCK F
I have a 2001 Z06 with the following mods:
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
stock z06 cam and heads, forged flat top pistons and aftermarket rods
Procharger P1SC-1 (8 rib pulley) running 10lbs boost, with a (non-name brand) large single intercooler
70lb fast injectors and boost a pump
Methanol injection (running 50% meth/50% water
LG Long tubes with X-pipe and stock z06 titanium rear exhaust
3:90 gear set
I initially had the car dyno'ed at 498 hp/485 tq. After I added meth I had it redyno tuned and it is now reading 524.4 hp/512 Tq.
Do these numbers seem low to you guys--as I was honestly expecting around 600hp with 10lbs boost. I didn't know if I should be looking at seeing if there is a boost leak or some other problem or if these numbers seem OK for the components that I am using?
I take it you had the motor recently rebuilt (forged flat tops and after market rods) Compression ratio could be a bit lower or the heavier rotating assembly causing lower numbers.
Lower gear ratios will also yield lower HP numbers, Dyno pulls are done at a 1:1 ratio and this achieved in 4th gear with your stock 3.42s (so your 3.90s will bring down the numbers).
A D1SC @ 10lbs will move air more efficiently than a P1SC @10lbs = more HP. There have been a few articles about P1SC’s performance limitations @ 10lbs, mostly due to belt slippage.
The type of dyno is another factor. Depends on what you’re comparing your numbers to!
Thread Starter
Instructor
Joined: Apr 2011
Posts: 132
Likes: 0
From: Indianapolis IN
The numbers seem about right considering all the variables here!
I take it you had the motor recently rebuilt (forged flat tops and after market rods) Compression ratio could be a bit lower or the heavier rotating assembly causing lower numbers.
Lower gear ratios will also yield lower HP numbers, Dyno pulls are done at a 1:1 ratio and this achieved in 4th gear with your stock 3.42s (so your 3.90s will bring down the numbers).
A D1SC @ 10lbs will move air more efficiently than a P1SC @10lbs = more HP. There have been a few articles about P1SC’s performance limitations @ 10lbs, mostly due to belt slippage.
The type of dyno is another factor. Depends on what you’re comparing your numbers to!
I take it you had the motor recently rebuilt (forged flat tops and after market rods) Compression ratio could be a bit lower or the heavier rotating assembly causing lower numbers.
Lower gear ratios will also yield lower HP numbers, Dyno pulls are done at a 1:1 ratio and this achieved in 4th gear with your stock 3.42s (so your 3.90s will bring down the numbers).
A D1SC @ 10lbs will move air more efficiently than a P1SC @10lbs = more HP. There have been a few articles about P1SC’s performance limitations @ 10lbs, mostly due to belt slippage.
The type of dyno is another factor. Depends on what you’re comparing your numbers to!
Drifting
Joined: Feb 2010
Posts: 1,310
Likes: 99
From: Arlington Texas
On a P1 and your mods you are about in right spot. Some guy with a similar setup might have made more and some guy might make less. No car with the same setup makes the same numbers.
You really have a bolt and blower car. I know you have a forged bottom end but you arent taking advantage of it. 10lbs on a small blower, stock heads, stock cam.
Do some upgrades like a d1, heads, cam then you will make the power you want.
You really have a bolt and blower car. I know you have a forged bottom end but you arent taking advantage of it. 10lbs on a small blower, stock heads, stock cam.
Do some upgrades like a d1, heads, cam then you will make the power you want.
Pro
Joined: Sep 2004
Posts: 524
Likes: 0
From: (<---~ NOVA ~--->) E \ LUCK F
the dyno was a dynojet. Yes, the motor was recently rebuilt. I think the compression ratio might be a little lower than stock (definately no higher). The shop that originally built the engine won't tell me the exact model of mahle piston that they used--only that it was a forged flat top. The guy that recently dyno tuned the car said that the crank compression seemed a little low at 165 - 170 psi? How much do you think the numbers are skewed due to the 3:90 gearing? What would the increase be with the original 3:42's?
The gear install could show you somewhere around 5-8 HP….they don’t actually cost you HP they just skew the numbers.
If the motor pulls hard, doesn’t use oil and gets decent MPG (considering driving habits) JUST go have fun with it and put a D1SC on it when you want more
…..Chasing DYNO numbers is silly 
....too many variables!!!
Melting Slicks
Joined: Aug 2008
Posts: 3,451
Likes: 27
From: Bay Area CA
with 165-170 cranking psi - it sounds to me like you're rebuild is a low compression motor. With the same boost, you'll make less power than a stock compression (10.5:1) motor. However, you can run a lot more boost....so - pulley it down and crank up the boost.
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Pro
Joined: Sep 2004
Posts: 524
Likes: 0
From: (<---~ NOVA ~--->) E \ LUCK F
He but he is running a P1SC @10lbs already...A D1SC would be the better way to go.
