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Old 03-10-2010, 09:56 AM   #1
JProberts

 
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Safe PSI on L99 with TVS2300

What is considered a safe PSI level for a L99 with no other mods except for the TVS2300 and maybe a roto fab CAI?

I would like to get to 500rwhp and figure I would need to run at least 7psi or
8psi to get to 500rwhp.

From what I understand the recommended and standard set-up with the TVS2300 is 6psi but I do not think I would get to 500rwhp on the L99 at 6psi and wanted to know if i am asking for trouble if I have to run 8psi to achieve the 500rwhp.

Also this is a daily driver in the city and was wondereing how street friendly the car would ride at 8psi

Any insight you guys could give regarding these qustions would be greatly appreciated.

Thanks
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Old 03-10-2010, 10:04 AM   #2
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The nice thing about the TVS2300 is you will never know its on the car untill you punch it. So as far as street driveabilty, it will remain the same. IMO You should be fine with the 3.6 pulley (3.8 comes with the kit) and it should put you over the 500hp marker and you will be in the 7-8lbs area. I have not heard of anybody with any problems running 8lbs max.
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Old 03-10-2010, 10:10 AM   #3
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The nice thing about the TVS2300 is you will never know its on the car untill you punch it. So as far as street driveabilty, it will remain the same. IMO You should be fine with the 3.6 pulley (3.8 comes with the kit) and it should put you over the 500hp marker and you will be in the 7-8lbs area. I have not heard of anybody with any problems running 8lbs max.
Enlighten me a bit, why the need to change the pulley from what comes standard with the kit? What is the cost to upgrade the pulley? Is that an option you can ask for when you order the kit?

Thanks for the insight.
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Old 03-10-2010, 10:12 AM   #4
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Weird! I am getting this exact setup done in May! Though I may not reach 500whp as we only get 91 octane in Kali... My guy says it will be 480+ at 8psi, plus I don't wanna have to run it at the ragged edge of the tune just to get to 500...

Hey Barton, how are the pulleys marked to identify them? Are they stamped with the 3.6 or whatever on them? Just wanna be able to verify it was installed and am able run up to 8psi...
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Old 03-10-2010, 10:16 AM   #5
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The pulley is what increases the boost. The smaller you go the more boost you make. The stock pulley is a 3.8 and then they go down from there. 3.6, 3.4 etc.. The pulley's are about $100. A lot of tuners will have the pulleys at thier facility and will change the pulley to get you to the #'s you want to be at. I highly recomend getting it Dyno tuned. The Maggie tune leaves alot of hp on the table.
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Old 03-10-2010, 10:24 AM   #6
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Quote:
Originally Posted by hypurone View Post
Weird! I am getting this exact setup done in May! Though I may not reach 500whp as we only get 91 octane in Kali... My guy says it will be 480+ at 8psi, plus I don't wanna have to run it at the ragged edge of the tune just to get to 500...

Hey Barton, how are the pulleys marked to identify them? Are they stamped with the 3.6 or whatever on them? Just wanna be able to verify it was installed and am able run up to 8psi...
Yes, The pulley size is engraved right on the front of the pulley.
I would highly recomend Headers and a CAI (if you can) to allow for better air flow.

Keep in mind. I AM NOT A TUNNER. Just a very happy Maggie customer.
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Old 03-10-2010, 10:26 AM   #7
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Correct, a dyno tune will really bring the power out of the stock tune that comes with the blower.
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Old 03-10-2010, 10:28 AM   #8
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500+ RWHP,
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Old 03-10-2010, 10:34 AM   #9
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Quote:
Originally Posted by Barton Industries View Post
Yes, The pulley size is engraved right on the front of the pulley. perfect thanks
I would highly recomend Headers and a CAI (if you can) to allow for better air flow. I have DT's (gotta pass smog here in Kali) and the C.A.I Intake already on a canned Predator tune, so they will carry over

Keep in mind. I AM NOT A TUNNER. Just a very happy Maggie customer. I know, that is why I was asking, as I knew you had gone to the darkside!
...
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Old 03-18-2010, 05:55 PM   #10
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WIth the stock tune from Magnuson I am only pulling 415 hp and 402 tq. the only addition at this point is a Magna flow axle back exhaust. It is hard for me to believe that you can get that much more HP from a tune. Can you explain the difference or why the tune is soooooo conservative anybody??
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Old 03-18-2010, 06:03 PM   #11
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I'm at 10.5 psi on my l99 with the stock internals and it's fine. You'll be ok at 8 psi. Don't worry.
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Old 03-18-2010, 06:05 PM   #12
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526 RWHP from my TVS2300 when LPE tuned my car with only a CAI and NO headers...

Stock pulley...

mine is a 6 speed standard trans.
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Old 03-18-2010, 06:13 PM   #13
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I'm at 10.5 psi on my l99 with the stock internals and it's fine. You'll be ok at 8 psi. Don't worry.
what is your RWHP at 10 pounds ? any other mods ? thanks.
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Old 03-18-2010, 06:15 PM   #14
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Quote:
Originally Posted by racer778 View Post
WIth the stock tune from Magnuson I am only pulling 415 hp and 402 tq. the only addition at this point is a Magna flow axle back exhaust. It is hard for me to believe that you can get that much more HP from a tune. Can you explain the difference or why the tune is soooooo conservative anybody??
You'll get an easy 20 RWHP with CAI; I'd consider that too Also, know that different dynos' will give different numbers. What tranny do you have? What dyno' was it on? What was the baseline? It seems like most people are getting almost 500 RWHP on a stock LS3 and something like 20-40 RWHP less for L99 cars.

As far as for why so conservative, I'm no employee, nor will I speak for anyone, but I'm sure those canned tunes are there to run safely on our sh*tty Cali' 91 gas. In many other places, one can get 93 at the pump, but not our glorious state. Having said that, they also offer an extra cost warranty so that tune will make sure you're going to have years of trouble-free tire-burning. I'm sure you can get more aggressive fuel and spark tables with a good dyno' tuner and eek even more power out of that car.

JMHO.
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Old 03-18-2010, 06:16 PM   #15
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what is your RWHP at 10 pounds ? any other mods ? thanks.
I think he was close to 600+ RWHP with some more bolt-ons.
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Old 03-18-2010, 06:19 PM   #16
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3.4 pulley, CAI cold air kit, Kooks 1 3/4 LT's, cooling mist meth kit, 550 rwhp / 560 rwtq. I also have a 3.0 pulley but I'm afraid to put it on!
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Old 03-18-2010, 06:42 PM   #17
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3.4 pulley, CAI cold air kit, Kooks 1 3/4 LT's, cooling mist meth kit, 550 rwhp / 560 rwtq. I also have a 3.0 pulley but I'm afraid to put it on!
My bad - sorry
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Old 03-18-2010, 08:31 PM   #18
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I wish it was 600 rwhp. Thats what the 3.0 pulley is for but I'm afraid to put it on. I think that is def pushing it.
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Old 03-18-2010, 08:37 PM   #19
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I wish it was 600 rwhp. Thats what the 3.0 pulley is for but I'm afraid to put it on. I think that is def pushing it.
10.5 psi is pretty impressive. I think you are wise in holding off on that 3.0 pulley. That is pretty tough on a motor with a static compression of 10.4.
Hate to see the ring lands break...or worse.
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Old 03-18-2010, 08:58 PM   #20
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I'm going to wait for a track outing or two and see if I want to try the 3.0 or maybe a 3.2. I', hoping the 3.4 will keep me happy. I think over a 3.4 is taking a chance, at least that what everyone says.
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Old 03-18-2010, 09:03 PM   #21
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I'm going to wait for a track outing or two and see if I want to try the 3.0 or maybe a 3.2. I', hoping the 3.4 will keep me happy. I think over a 3.4 is taking a chance, at least that what everyone says.

When you go to the track, if you just have to try for more boost, add some race fuel to your tank and make sure it is going through the engine before making a hard pass. For a more permanent solution, add a water/methanol injection unit like a Snow Performance. But be forewarned, if you push the stock internals too hard they may break. The tricky part is no one knows on any given car what that point really is...

Enjoy it first with what you have. Traction will probably be your toughest challenge, not HP.
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Old 03-18-2010, 09:44 PM   #22
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Check out East texas muscle cars multiple builds with 8psi headers CAi and axelback with ported throttle body. 500-510rwhp on safe tune.
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Old 03-18-2010, 09:56 PM   #23
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Quote:
Originally Posted by Barton Industries View Post
Yes, The pulley size is engraved right on the front of the pulley.
I would highly recomend Headers and a CAI (if you can) to allow for better air flow.

Keep in mind. I AM NOT A TUNNER. Just a very happy Maggie customer.
how much does a CAI actualy help on an FI car? I understand headers, but I'm just not that sure about a CAI
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Old 03-18-2010, 10:45 PM   #24
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Thanks for the info everyone
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Old 03-18-2010, 10:52 PM   #25
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Maggie with 3.6 (I ordered with it because I knew I was adding headers, no extra costs) Rotafab, Kook's headers. Running the stock Magnuson tune it put down 563 HP and 543 Torque. I have richened it now during WOT as it was lean. It drives the same as stock unless you push too hard on the accelerator
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