Pettit Super Charger Owners - Page 145

Nov 19, 2008 | 01:59 PM

#3601

Kane

Senior Member

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From: PCB

Hell yeah - I used to use it all the time.

My Software button Says "Optimize My Fuel Bitch!!!" on it; so the precedent is there....

Nov 19, 2008 | 03:38 PM

#3602

morkusyambo

Dongbag extrordinare

Joined: Nov 2004

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From: Away from the fruits of my labor

Quote:

Originally Posted by Red Devil

I have documentation on Lysholm units. They typically draw 5hp more than the Autorotor ones. Off the top of my head the RX-8 draw from Lysholm was around 30hp at 8psi.

That is substantially less, IMO, than the 50hp posted earlier.

Nov 19, 2008 | 04:53 PM

#3603

Rotr8

whines all the way home

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From: Towson/Baltimore, MD

Quote:

Originally Posted by Kane

Do Until [Tired of BS] = "yes"
Call SC_is_mo_better_science()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call TC_is_mo_better_science()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call not_ugh()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call uhh_huh()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call various_dyno_proof()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call various_dyno_rebuttals()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call circular_logic()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Call other_poster_is_a_poo_poo_head_and_fanboi()
If Postcount On Subject < 100 Then [Tired of BS] = "no" Else [Tired of BS] = "yes" End If
Loop

There - just run this little program to find out what happens.

lol

sad but true....
Moon I thought you said you were gonna behave.....

Nov 19, 2008 | 05:37 PM

#3604

Moon Assad

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From: Maryland

And if you look at the factory units and the way they configure them for testing your going to see a SPRING loaded bypass valve so 1 1/2 HP isnt going to be the load at idle with the Pettit setup maybe 1/2. As for PSI rating, you have to take flow rate into consideration, if you allow as much airflow that your intake can except your never going to see 30 psi withought overspinning the blower and or engine. Would you like to take a wild guess what your tac would read to see 30 psi and not overspin the 1.7. Not that your overspinning the 1.7, your about 700 RPM short at 9K. Why do you think im trying a bigger blower???? What if its going to make 25 psi and not overspin.

Nov 19, 2008 | 06:13 PM

#3605

olddragger

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From: macon, georgia

what the fella said is true in general terms --any fi system can be set up good or bad. Turbos can develop power at low rpms, s.c can get up top power--just all depends. Its like cooking spaghetti.
OD

Nov 19, 2008 | 06:42 PM

#3606

olddragger

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From: macon, georgia

well winter is really here in Ga--so I have an ignition system to build---the ms coils actually spec out ok and they sure look stout enough--the igniter box may have been the problem--wonder if i could just hook them up without an igniter box? They have 3 pin d type connectors.
Thoughts ?
I also have a fuel starvation/cut fix to work on(stay tuned someone will have to post pics for me!) and I do have a plan!
OD

Nov 19, 2008 | 07:54 PM

#3607

Rote8

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From: Boosted...

More MAF

I made this one this morning, the screen shot number is clearer on this picture.
Almost my best ever MAF reading.

Last edited by Rote8; Oct 16, 2009 at 05:12 PM.

Nov 19, 2008 | 08:25 PM

#3608

Bastage

DEVILMAN

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From: Melbourne, FL

Quote:

Originally Posted by olddragger

well winter is really here in Ga--so I have an ignition system to build---the ms coils actually spec out ok and they sure look stout enough--the igniter box may have been the problem--wonder if i could just hook them up without an igniter box? They have 3 pin d type connectors.
Thoughts ?
I also have a fuel starvation/cut fix to work on(stay tuned someone will have to post pics for me!) and I do have a plan!
OD

I don't think they'll work that way.

Just get the yukon coils, they're cheaper than the OEM ones and are much better. Send Juan a PM about the connectors (4-pin), or give Ray a call and he'll hook you up.

Nov 19, 2008 | 08:25 PM

#3609

Rote8

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From: Boosted...

Quote:

Originally Posted by Bastage

Seriously. I want to see Norm's car on a dyno.

I need the larger injectors, my thought is the stock secondary ones from a four port.
I can also put out the stock coils spark like a candle in a tornado.

It would be fun to "see what it does", before doing the above mods.

Nov 19, 2008 | 08:26 PM

#3610

Bastage

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From: Melbourne, FL

Quote:

Originally Posted by Rote8

I made this one this morning, the screen shot number is clearer on this picture.
Almost my best ever MAF reading.

Nov 19, 2008 | 09:03 PM

#3611

shinka213

Pettit fangurl <3

Joined: Mar 2005

Posts: 5,386

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From: Aston, PA

Quote:

Originally Posted by Rote8

I made this one this morning, the screen shot number is clearer on this picture.
Almost my best ever MAF reading.

shizzle ****!!!

Nov 20, 2008 | 03:42 AM

#3612

california style

Londons Yellow Peril

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From: North London

Hesus Christos! That's a lot of MAF!

Is yours just a stock setup, or what else have you done. With that much flow you must be getting into the fuel / spark / injectors issues no?

Nov 20, 2008 | 06:21 AM

#3613

Rote8

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From: Boosted...

Quote:

Originally Posted by california style

Hesus Christos! That's a lot of MAF!

Is yours just a stock setup, or what else have you done. With that much flow you must be getting into the fuel / spark / injectors issues no?

I am hopeful it's not the "fuel", I am planning on changing secondary injectors and going with LS1 coils.

I am itching to get a dyno reading.

Nov 20, 2008 | 09:28 AM

#3614

olddragger

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From: macon, georgia

may also look at fuel pressure issues!
what gear was that pull?
you on oem ignition?
OD

Nov 20, 2008 | 06:26 PM

#3615

MazdaManiac

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From: Under my car

Just for your edification, this is what the MAF/Load values are for my turbo car at 9 PSI:

This is just a casual rip through second and third on my street. Didn't even take it to redline.

As you can see, the MAF is pegged at its maximum value (369 g/sec) so, who knows what its actual flow is.
ABSLoad hits 2 in some spots (also pegged) - all at considerably fewer RPM than the S/C.
Fortunately, the fuel calculations continue to stretch until the end of the available injector flow or this would all end very badly.

So, take your understanding of power and how it relates to MAF flow with a grain of salt.

Data is below.

Attached Thumbnails

Last edited by MazdaManiac; Nov 20, 2008 at 06:40 PM.

Nov 20, 2008 | 07:01 PM

#3616

olddragger

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From: macon, georgia

nice MM, Nice

OD

Nov 20, 2008 | 07:16 PM

#3617

Rote8

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From: Boosted...

Quote:

Originally Posted by olddragger

may also look at fuel pressure issues!
what gear was that pull?
you on oem ignition?
OD

I think it was second, and yes, "fresh" OEM coils

Nov 20, 2008 | 07:20 PM

#3618

MazdaManiac

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From: Under my car

For basic reference:

370 g/sec = 49 lbs/min = 426 crank HP

Give or take a few.

Nov 20, 2008 | 08:54 PM

#3619

Brettus

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From: Y-cat-o NZ

Quote:

Originally Posted by MazdaManiac

This is just a casual rip through second and third on my street. .

They must lurve you !

at only 9psi - holy carp - i'm at only 314g/s at 8 psi and 7500 !!!!

Nov 20, 2008 | 09:09 PM

#3620

MazdaManiac

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From: Under my car

Quote:

Originally Posted by Brettus

They must lurve you !

Well, not actually my street. Kinda the next one over.
The big one with 4 lanes and no houses.
I'm here.
My personal dragstrip is here.

Quote:

Originally Posted by Brettus

at only 9psi - holy carp - i'm at only 314g/s at 8 psi and 7500 !!!!

Well, bigger turbo!

Last edited by MazdaManiac; Nov 20, 2008 at 09:16 PM.

Nov 20, 2008 | 09:26 PM

#3621

Brettus

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From: Y-cat-o NZ

have you counted up how many swimming pools in your area ? looks like you have a choice for your back yard - cactus or a swimming pool

Nov 20, 2008 | 09:34 PM

#3622

MazdaManiac

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From: Under my car

Quote:

Originally Posted by Brettus

have you counted up how many swimming pools in your area ? looks like you have a choice for your back yard - cactus or a swimming pool

Well, it is the desert!
You can knock $20k USD off the value of your house if you don't have a pool.
I've got both. And a mountain.

Nov 21, 2008 | 01:44 AM

#3623

Hymee

Race Steward

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From: Brisbane, Australia

Quote:

Originally Posted by MazdaManiac

Well, it is the desert!
You can knock $20k USD off the value of your house if you don't have a pool.

Wouldn't that take the value of the house into the negative given all the housing market crash :0 j/k

Cheers,
Hymee.

Nov 21, 2008 | 02:49 AM

#3624

Brettus

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From: Y-cat-o NZ

/\ nice one hymee

Nov 21, 2008 | 09:42 AM

#3625

olddragger

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From: macon, georgia

get readings in 6th gear over approx 12 second pull

--mine was at approx 132.3 mph
you should have felt the G's as my carbotec xp8's clamped down( on 275 nittos)!!
You can see God sometimes in a braking zone.
OD