Pettit Super Charger Owners
07-09-2008, 11:10 PM
#2576
315cc (or ml/min - same thing for water) is only for 250 - 400 HP.
A 630cc nozzle is for about 400 - 600.
The 155cc is only good to 250 HP at best.
You want to shoot high by 25% and dial back the controller.
Technically, I'm topping out the 315cc nozzle, but I don't need it as much as the SC does.
A 630cc nozzle is for about 400 - 600.
The 155cc is only good to 250 HP at best.
You want to shoot high by 25% and dial back the controller.
Technically, I'm topping out the 315cc nozzle, but I don't need it as much as the SC does.
07-09-2008, 11:12 PM
#2577
Registered
175 ml nozzle just after the inter cooler.
I wanted to change over to dual nozzles and get rid of methanol flowing through my throttle body.
Well, I drilled and tapped one.
This is with the 175 ml nozzle right after the inter cooler.
The outside temp is 82 degrees, the intake air temp is 85.
(The A/C is on in this test!)
Ambient air is in the upper right, Intake Air Temp is in the bottom middle.
I did find I can easily quench the engine with this much methanol water mix, so I set the "full" setting to a higher MAF number on my Variable MAF controller, methanol still starts at a low MAF setting, but does not get "full strength" spray till a higher MAF setting.
My method of drilling was with help from several RX8 board members:
I removed the Pettit upper intake manifold.
I cut a paper plate to make a dam to contain the shavings from the drilling and tapping.
I used duct tape to seal the piece of paper plate to the inside of the inter cooler output.
Do not take any chance with shavings getting into the engine.
I also added the finished picture. (I will do the intake side to add the second nozzle another day)
Well, I drilled and tapped one.
This is with the 175 ml nozzle right after the inter cooler.
The outside temp is 82 degrees, the intake air temp is 85.
(The A/C is on in this test!)
Ambient air is in the upper right, Intake Air Temp is in the bottom middle.
I did find I can easily quench the engine with this much methanol water mix, so I set the "full" setting to a higher MAF number on my Variable MAF controller, methanol still starts at a low MAF setting, but does not get "full strength" spray till a higher MAF setting.
My method of drilling was with help from several RX8 board members:
I removed the Pettit upper intake manifold.
I cut a paper plate to make a dam to contain the shavings from the drilling and tapping.
I used duct tape to seal the piece of paper plate to the inside of the inter cooler output.
Do not take any chance with shavings getting into the engine.
I also added the finished picture. (I will do the intake side to add the second nozzle another day)
Last edited by Rote8; 10-16-2009 at 05:12 PM.
07-09-2008, 11:59 PM
#2578
I've put the controller in "test" mode (ramps up to full-on and stays there) with the 315cc nozzle and the motor doesn't even react.
I've emptied 1/4 of my 1/2 gallon bottle like that and there was no change in idle at all.
Maybe its the low humidity here...
07-10-2008, 01:03 AM
#2579
Registered
??? 175cc "quenches" the engine?
I've put the controller in "test" mode (ramps up to full-on and stays there) with the 315cc nozzle and the motor doesn't even react.
I've emptied 1/4 of my 1/2 gallon bottle like that and there was no change in idle at all.
Maybe its the low humidity here...
I've put the controller in "test" mode (ramps up to full-on and stays there) with the 315cc nozzle and the motor doesn't even react.
I've emptied 1/4 of my 1/2 gallon bottle like that and there was no change in idle at all.
Maybe its the low humidity here...
It's sort of strange with the "full on" set low on the variable MAF triggered controller:
The initial take off is fine, full throttle after spin up is fine, but at middle MAF flow I was feeling some quench.
I wound up setting the MAF controller to allow the initial flow starting at 1.0 and full flow coming in at 4.8.
I have no leaks, I no longer have Boost-Juice dripping from the air filter like my old MAF housing injection point.
Next up, I want to try it with no water; just straight methanol with 15% nitromethane!
07-10-2008, 02:46 AM
#2581
Set the "on" point to about 3 PSI and the "off" to just slightly above your maximum boost.
Size your nozzle accordingly.
That said, you should be able to turn the 650cc nozzle on at idle without any "quench" or whatever.
What you are probably feeling is lean misfire.
07-10-2008, 06:39 AM
#2582
Registered
Well, there is your problem. What is the point of using a progressive controller if you are going to set it up like that?
Set the "on" point to about 3 PSI and the "off" to just slightly above your maximum boost.
Size your nozzle accordingly.
That said, you should be able to turn the 650cc nozzle on at idle without any "quench" or whatever.
What you are probably feeling is lean misfire.
Set the "on" point to about 3 PSI and the "off" to just slightly above your maximum boost.
Size your nozzle accordingly.
That said, you should be able to turn the 650cc nozzle on at idle without any "quench" or whatever.
What you are probably feeling is lean misfire.
My lowering the flow was due to my car being daily driven, and there was too much methanol at a low speed part throttle.
07-10-2008, 07:02 AM
#2583
Registered
07-10-2008, 07:31 AM
#2584
Last edited by Bastage; 07-10-2008 at 07:37 AM.
07-10-2008, 10:58 AM
#2586
85% humidity.................OMG how can you breath? Presently our humidity is 8% and dropping with a temp of 106 (8:22am). Expect only 115 today with about a 6% humidity rate. I wonder what it feels like to live in water? - You guys have got to have webbed fingers, feet and gills.
07-10-2008, 11:03 AM
#2587
Surf Hard, Drive Hard
Join Date: Feb 2007
Location: Indialantic, Florida
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Yep, we do........we live in a swamp!
Actually.........85% is about norm, or even low for 9 months out of the year.
Rarely does it break 100 degrees, but it stays at 90-93 with 85% or better humidity for at LEAST 6 months and probably more like 8 months. At least I live one block from the beach on the East Coast of Florida so I get a breeze almost all the time. Bastage doesn't get the same breeze living across on the mainland only 5 miles away.
Actually.........85% is about norm, or even low for 9 months out of the year.
Rarely does it break 100 degrees, but it stays at 90-93 with 85% or better humidity for at LEAST 6 months and probably more like 8 months. At least I live one block from the beach on the East Coast of Florida so I get a breeze almost all the time. Bastage doesn't get the same breeze living across on the mainland only 5 miles away.
07-10-2008, 11:11 AM
#2588
85% humidity.................OMG how can you breath? Presently our humidity is 8% and dropping with a temp of 106 (8:22am). Expect only 115 today with about a 6% humidity rate. I wonder what it feels like to live in water? - You guys have got to have webbed fingers, feet and gills.
One of the reasons I'd like to move up north a bit within the next few years.
Yep, we do........we live in a swamp!
Actually.........85% is about norm, or even low for 9 months out of the year.
Rarely does it break 100 degrees, but it stays at 90-93 with 85% or better humidity for at LEAST 6 months and probably more like 8 months. At least I live one block from the beach on the East Coast of Florida so I get a breeze almost all the time. Bastage doesn't get the same breeze living across on the mainland only 5 miles away.
Actually.........85% is about norm, or even low for 9 months out of the year.
Rarely does it break 100 degrees, but it stays at 90-93 with 85% or better humidity for at LEAST 6 months and probably more like 8 months. At least I live one block from the beach on the East Coast of Florida so I get a breeze almost all the time. Bastage doesn't get the same breeze living across on the mainland only 5 miles away.
Last edited by Bastage; 07-10-2008 at 11:18 AM.
. That way you'll feel at home
07-10-2008, 03:26 PM
#2593
That looks brand new - 1st post also- Welcome to the group. You will find us helpful, argumentative, full of BS and above all fellow Pettit s/c owners. Need questions answered? - just post them and stand back for the onslaught of good information and arguments 
.
WELCOME BRIAN
and arguments .WELCOME BRIAN
Last edited by Phil's 8; 07-10-2008 at 03:45 PM.
07-10-2008, 04:43 PM
#2598
Thank you every 1 lol im located in aventura fl near the mall. Umm im considering going i really want to see what my car can do just call me if ur gonna go maybe well ride out together.