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Old 06-22-2013, 08:37 PM   #1
2sscamaro11
 
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427 with a new style TVS?

I am looking at swapping a forged 427 LS7 with LS3 heads into my 2011 ss that I already have a new style slp tvs 2300 on. I know the 2300 is not the ideal blower for this engine, but I am really only looking to get 650-700rwhp. This will be a weekend warrior (1/4 mile) and nice weather driver.

So, the main question is, has anyone ran the new style tvs on a 427? Would the older version be better due to multipule pulley options to achieve 10psi of boost? I do have an opportunity to use the older version if I would like, but I really like what I have.

I appreciate your time, and value any and all opionions.

Paul
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Old 06-22-2013, 08:42 PM   #2
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You're going to need an overdriven balancer to do it with a front drive. You might get away without the o/d with a rear drive. I hate the idea of running all of the accessories on the front of the motor faster than they need to be run. Your call.
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Old 06-22-2013, 08:43 PM   #3
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Nope! Front drive version will never support a 427 @ 10 psi!

Last edited by Ray@RDS; 06-22-2013 at 08:44 PM. Reason: Spelling
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Old 06-22-2013, 08:45 PM   #4
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You're going to need an overdriven balancer to do it with a front drive. You might get away without the o/d with a rear drive. I hate the idea of running all of the accessories on the front of the motor faster than they need to be run. Your call.
The SLP has no external rear pulleys so he doesn't have that option. Just the older 2300 have the rear cog option.
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Old 06-22-2013, 08:47 PM   #5
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Wait! 13 to 1 dome top pistons lol!
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Old 06-22-2013, 09:00 PM   #6
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The SLP has no external rear pulleys so he doesn't have that option. Just the older 2300 have the rear cog option.
I think that's what I tried to say...maybe I said something that might not have been what I thought I might have been thinking....or something like that
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Old 06-22-2013, 09:06 PM   #7
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If I am understating everyone correctly, I need to run the old style because of the rear pulley options available to help me achieve to desired boost level and rotor rpm. Correct?

By the way, I appreacite all of the help!
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Old 06-22-2013, 09:07 PM   #8
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I think that's what I tried to say...maybe I said something that might not have been what I thought I might have been thinking....or something like that
I read it both ways so I figured I'd state the obvious. I think the OP already knows what we were trying to say.
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Old 06-22-2013, 09:08 PM   #9
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Originally Posted by 2sscamaro11 View Post
If I am understating everyone correctly, I need to run the old style because of the rear pulley options available to help me achieve to desired boost level and rotor rpm. Correct?

By the way, I appreacite all of the help!
The older 2300 will most likely achieve higher boost but that comes with higher iats which isn't gd.

You'll have to find a happy medium.
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Old 06-22-2013, 09:11 PM   #10
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The older 2300 will most likely achieve higher boost but that comes with higher iats which isn't gd.

You'll have to find a happy medium.
Understood sir. I am looking for 650-700rwhp. I figured it would take around 10psi, but I am not dead set on that.
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Old 06-22-2013, 09:15 PM   #11
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Understood sir. I am only looking for 650-700rwhp. I figured it would take around 10psi, but I am not dead set on that.
May be a bit of a problem. 10 psi on my 376 was 545 rwhp. Figure the 427 has to be worth at least an extra 50 so you'd need about 14-15 psi to see the number you want. Like RDS said you'll have to really spin that blower to make that much boost. If its even possible. You'll most likely need the older blower in order to come close the the boost levels needed.
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Old 06-22-2013, 09:23 PM   #12
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May be a bit of a problem. 10 psi on my 376 was 545 rwhp. Figure the 427 has to be worth at least an extra 50 so you'd need about 14-15 psi to see the number you want. Like RDS said you'll have to really spin that blower to make that much boost. If its even possible. You'll most likely need the older blower in order to come close the the boost levels needed.
Dumb question, you are running through and auto correct? Wouldn't me being an M6 be worth maybe another 50hp which might get me pretty close to 650rwhp. I know there is a lot of speculation here, and I appreciate all of the help.
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Old 06-22-2013, 09:26 PM   #13
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Dumb question, you are running through and auto correct? Wouldn't me being an M6 be worth maybe another 50hp which might get me pretty close to 650rwhp. I know there is a lot of speculation here, and I appreciate all of the help.
Yup. I didn't even consider that. I still think you'll be better off with the older style 2300. With rear overdriven cogs and a 8 rib (min) pulleys up front you'll have much more control of the boost.
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Old 06-22-2013, 09:30 PM   #14
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Yup. I didn't even consider that. I still think you'll be better off with the older style 2300. With rear overdriven cogs and a 8 rib (min) pulleys up front you'll have much more control of the boost.

I agree about the older style sir. I appreciate all of the help!

Thank you,

Paul
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Old 06-22-2013, 09:42 PM   #15
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I'm a little over 9psi with M6, LS3, bolt ons and mild blower cam. 650ish at the wheels. Stingy dyno too. 3.3 front with 1:1 rears. You could do a front drive with tiny pulley (belt slip). Or rear drive with o/d pulleys and 3.6 front pulley (little or no slip). Other option is o/d crank pulley with front drive. Still need a pretty small front pulley to get you where you want to be. And all or your accessories on the front of the motor are spinning too fast. By far, the best option is the rear drive with o/d pulleys.
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Old 06-22-2013, 09:53 PM   #16
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The Magnason style will give you the most hp and some room to grow,we never stop lol.
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Old 06-23-2013, 10:53 AM   #17
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Old style TVS gets you the numbers you're looking for on a 427. I know of one that just put up 678/770 ft lbs @8psi .
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Old 06-23-2013, 11:40 AM   #18
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Whipple makes a kit for Z06 (LS7) vettes. Don't know if there are any challenges going to a C5. You might have a little more head room with the bigger blower. That's if you don't want to get on to the "adding ribs" treadmill that gradually sucks your wallet dry. You don't notice it, but you get talked into 8 ribs, then 10 ribs, then o/d balancers.....then, you wake up one day and go, "sheeeeeeeiat, money's gone". Then it's, "Honey, you have a little spare time. Any chance of you working a second job?"
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Old 06-24-2013, 09:21 AM   #19
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You can make 10psi with a front drive TVS2300 and a 427. Mine does 8.5psi but its only like this because I didn't want to turn it up, you need to run an 8" OD balancer and a 3.0 pulley, but will need an 8-rib drive and about 10:1 static compression.

Use the jackshaft version and risk breaking the jackshaft at higher blower speeds.
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Old 06-24-2013, 09:38 AM   #20
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You can make 10psi with a front drive TVS2300 and a 427. Mine does 8.5psi but its only like this because I didn't want to turn it up, you need to run an 8" OD balancer and a 3.0 pulley, but will need an 8-rib drive and about 10:1 static compression.

Use the jackshaft version and risk breaking the jackshaft at higher blower speeds.
How much are you pulling? RWHP and Torq
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Old 06-24-2013, 10:51 AM   #21
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Thought about swapping to a centri or turbos? Easy 650-1000rwhp with a forged 427. Turbos would make more torque and be adjustable for boost/power at the turn of a dial.
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Old 06-24-2013, 11:12 AM   #22
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Quote:
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Whipple makes a kit for Z06 (LS7) vettes. Don't know if there are any challenges going to a C5. You might have a little more head room with the bigger blower. That's if you don't want to get on to the "adding ribs" treadmill that gradually sucks your wallet dry. You don't notice it, but you get talked into 8 ribs, then 10 ribs, then o/d balancers.....then, you wake up one day and go, "sheeeeeeeiat, money's gone". Then it's, "Honey, you have a little spare time. Any chance of you working a second job?"
Brother Im working a second job for all my mods now LMAO!
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