Cog driven maggy question? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2SS\RS · 08-26-2011, 10:06 AM

So I am currently running an overdriven rear pulley setup on my maggy 2300. What are the pros/cons of cog driving it?

pyr0b0y · 08-26-2011, 10:21 AM

you're going to be making higher boost, so be sure you dont go with a really small pulley size on the front on a stock engine or you could run into problems. The cog drives also whine more FYI.

Can you explain your question more; or what you are trying to do?

2SS\RS · 08-26-2011, 10:31 AM

i would like to get more whine out of the charger!! i like it! My motor is stock but im not running too small of a pully on the maggy. I will find out what sizes im running exactly later today.

Supercharged SS · 08-26-2011, 10:39 AM

Seems like you need the 1:1 cog drive. Jessika at Maggie should be able to hook you up. If you OD the rear cog you will gain a few lbs. of boost. Which on a stock engine may not be wanted.

You can OD the rear cog and the pulley up (going to a bigger pulley) the fron to compensate and bring the boost back down.

HumanWiki · 08-26-2011, 11:25 AM

3.8" pulley up front and OD in the rear with 1&3/4 LTs on mine ran me at 11PSI.

2SS\RS · 08-26-2011, 03:24 PM

mine is an overdrive in the rear and a 3.6 in the front. and my car is a L99

HumanWiki · 08-26-2011, 03:35 PM

How are you running 3.6 up front an OD Cog Drive in the back and getting 9PSI without running a cam, lower compression, etc?

2SS\RS · 08-26-2011, 04:19 PM

Mines not cog, just overdriven pulleys in the rear. It's at 9 psi, is that really low? Im not sure how much differences there are between the auto and manual motors, but mine is the auto. What is the max psi a stock motor can handle (L99)?

HumanWiki · 08-26-2011, 04:21 PM

Quote:

Originally Posted by 2SS\RS

Mines not cog, just overdriven pulleys in the rear. It's at 9 psi, is that really low? What is the max psi a stock motor can handle?

Oh...... I got you now.. I was thinking you were making that PSI on the OD cogs for the Maggie and were asking what's the benefit of the part you already had.... Just misunderstood your wording there...

I can't speak to the stock boost safety thing other than to say it's more complicated than a simple PSI number... you can kill a motor on low boost with bad tune, fuel, etc..

2SS\RS · 08-26-2011, 04:31 PM

Quote:

Originally Posted by HumanWiki

Oh...... I got you now.. I was thinking you were making that PSI on the OD cogs for the Maggie and were asking what's the benefit of the part you already had.... Just misunderstood your wording there...

I can't speak to the stock boost safety thing other than to say it's more complicated than a simple PSI number... you can kill a motor on low boost with bad tune, fuel, etc..

I Understand that it is more than just numbers, I was gonna try and get it to 11-13 when I get fuel system, etc.. I just was looking at overdriven cogs and wasn't sure if it would be worth going from overdriven pulleys to cogs? Any input? Thanks for your help bud!

HumanWiki · 08-26-2011, 04:36 PM

I have a set a vendor sold me and told me I'd be fine with.. I wasn't.. It made 11 PSI (was told about 9.5) with all my mods even on a 3.8" stock front TVS pulley. So, now I have a 375.00 paper weight that I can't use due to too much boost on a stock internal LS3. I can't seem to sell them either..

I can't tell you how they'd work on your car and I don't want to steer you in the wrong direction by giving you the wrong data and you end up blowing something up.. Just telling you what I dealt with.. The two people I talked to over at Magnuson were surprised I was trying to run them on a stock block as they don't really recommend that for the reasons I saw.

The 1:1 cogs are what you want for just sound and more belt grip, but at your boost level I doubt you're seeing slippage in the first place...

But, if you do want to go with the OD cogs.. I will sell you my set for 300.00 shipped to you. They don't come with the new machined fuel rail for clearance as I bought them before that was resolved, but your local shop shouldn't' have any issues clearancing your passenger side fuel rail. Mine were only on the car for the 1 dyno pull where the engine start pinging and pulling timing..

I personally wouldn't run 11-13 PSI even with a good fuel system on a stock set of pistons.. I'm sure you could do it and it would live for a while, but that's a lot of boost on a stock motor, even the slightly lower compression L99. One little thing goes wrong at that rating and your engine will most likely fail.

2SS\RS · 08-26-2011, 04:55 PM

Does it take a lot of time to remove the and put the cogs on or does the blower have to be removed?

HumanWiki · 08-26-2011, 04:59 PM

I believe on our cars they can be changed out while the s/c is still on the car. I can't give a time estimate. There are a couple threads on the topic in the FI area that could better answer that.

2SS\RS · 08-26-2011, 05:12 PM

But if I have over drive and I go to 1:1 cogs it would be a step back wouldnt it?

08-26-2011, 10:06 AM	#1
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	Cog driven maggy question? So I am currently running an overdriven rear pulley setup on my maggy 2300. What are the pros/cons of cog driving it?
$2SS\RS is offline$

08-26-2011, 10:21 AM	#2
pyr0b0y need....more....hp Drives: The Neighbor Hater Join Date: Dec 2010 Location: San Mateo, CA Posts: 4,091	you're going to be making higher boost, so be sure you dont go with a really small pulley size on the front on a stock engine or you could run into problems. The cog drives also whine more FYI. Can you explain your question more; or what you are trying to do? __________________ BUILD THREAD BUILT AND MAINTAINED BY BLU808 Mast Motorsports Built LS3 Stroker 418, IPS GT35R Twin Turbos, Exedy GTO4XD Twin Disc Clutch, Aeromotive A1000 Eliminator Stealth Fuel Pump, AEM Meth Injection, DSS 1400hp Axels, BC Coilovers, Pfadt & BMR Suspension, Hawk HPS Pads, Drilled/Slotted Rotors, Hurst Shifter, Custom Roll Cage by Blu808, T3 Ports, 22" Custom Concave Mesh Rims

08-26-2011, 10:31 AM	#3
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	i would like to get more whine out of the charger!! i like it! My motor is stock but im not running too small of a pully on the maggy. I will find out what sizes im running exactly later today.
$2SS\RS is offline$

08-26-2011, 03:24 PM	#6
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	mine is an overdrive in the rear and a 3.6 in the front. and my car is a L99
$2SS\RS is offline$

08-26-2011, 04:19 PM	#8
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	Mines not cog, just overdriven pulleys in the rear. It's at 9 psi, is that really low? Im not sure how much differences there are between the auto and manual motors, but mine is the auto. What is the max psi a stock motor can handle (L99)?
$2SS\RS is offline$

08-26-2011, 10:39 AM	#4
Supercharged SS Account Suspended Drives: 2010 Camaro Join Date: Feb 2010 Location: Sandy Hook, CT Posts: 11,927	Seems like you need the 1:1 cog drive. Jessika at Maggie should be able to hook you up. If you OD the rear cog you will gain a few lbs. of boost. Which on a stock engine may not be wanted. You can OD the rear cog and the pulley up (going to a bigger pulley) the fron to compensate and bring the boost back down.

08-26-2011, 11:25 AM	#5
HumanWiki Drives: Car Join Date: Jun 2010 Location: Place Posts: 3,361	3.8" pulley up front and OD in the rear with 1&3/4 LTs on mine ran me at 11PSI.

08-26-2011, 03:35 PM	#7
HumanWiki Drives: Car Join Date: Jun 2010 Location: Place Posts: 3,361	How are you running 3.6 up front an OD Cog Drive in the back and getting 9PSI without running a cam, lower compression, etc?

08-26-2011, 04:36 PM	#11
HumanWiki Drives: Car Join Date: Jun 2010 Location: Place Posts: 3,361	I have a set a vendor sold me and told me I'd be fine with.. I wasn't.. It made 11 PSI (was told about 9.5) with all my mods even on a 3.8" stock front TVS pulley. So, now I have a 375.00 paper weight that I can't use due to too much boost on a stock internal LS3. I can't seem to sell them either.. I can't tell you how they'd work on your car and I don't want to steer you in the wrong direction by giving you the wrong data and you end up blowing something up.. Just telling you what I dealt with.. The two people I talked to over at Magnuson were surprised I was trying to run them on a stock block as they don't really recommend that for the reasons I saw. The 1:1 cogs are what you want for just sound and more belt grip, but at your boost level I doubt you're seeing slippage in the first place... But, if you do want to go with the OD cogs.. I will sell you my set for 300.00 shipped to you. They don't come with the new machined fuel rail for clearance as I bought them before that was resolved, but your local shop shouldn't' have any issues clearancing your passenger side fuel rail. Mine were only on the car for the 1 dyno pull where the engine start pinging and pulling timing.. I personally wouldn't run 11-13 PSI even with a good fuel system on a stock set of pistons.. I'm sure you could do it and it would live for a while, but that's a lot of boost on a stock motor, even the slightly lower compression L99. One little thing goes wrong at that rating and your engine will most likely fail.

08-26-2011, 04:55 PM	#12
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	Does it take a lot of time to remove the and put the cogs on or does the blower have to be removed?
$2SS\RS is offline$

08-26-2011, 04:59 PM	#13
HumanWiki Drives: Car Join Date: Jun 2010 Location: Place Posts: 3,361	I believe on our cars they can be changed out while the s/c is still on the car. I can't give a time estimate. There are a couple threads on the topic in the FI area that could better answer that.

08-26-2011, 05:12 PM	#14
2SS\RS Drives: 2010 Camaro 2ss/rs Join Date: Apr 2011 Location: Las Vega Posts: 131 View My Garage	But if I have over drive and I go to 1:1 cogs it would be a step back wouldnt it?
$2SS\RS is offline$

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