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Old 09-12-2010, 03:28 PM   #1
Fiftydriver

 
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Three options to more power, help me decide....

TO all, I am looking to upgrade the performance of my L99 and have settled on three options. My goal is to get into that 550-600 WRHP range but still be able to use the car as an everyday driver, at least in the summer in clear weather!!! LOL

I already have Roto-Fab CAI, Dynatech 1 7/8" LT headers, Dynatech HF cats and Corsa Cat back exhaust with Jannetty tune.

Look over the options and tell me what you would do:

Option 1
Leave engine stock, add on
Magnacharger 2300 kit
Water/meth kit
Protorque 2600 torque converter
Jannetty custom tune
Pros:
-Should get me to that 545-550 WRHP range with great streetability
-Relatively affordable
-No messing with engine
Cons:
-Will my bottom end handle this long term
-No warrantee at all on engine and no back up

Option 2
Pull the L99 and replace it with the LSX376 which is built specifically for forced air systems.
Add same supercharger, same water meth, same TC and Jannetty tune
Pros:
-Could easily get to that 600 WRHP level
-VERY stout bottom end for power level
-More aggressive sound
-Still quite streetable
-2 year/50K warrantee
-Have fresh L99 sitting here as back up if needed
Cons:
-Extra $5500 + cost to pull and install new engine
-Possible issues with engine conversion

Option 3
Pull the L99 and replace with LSX454
F.A.S.T. 102mm intake manifold
Pros:
-Would get me into that 550-575 WRHP range with no supercharger or water/meth.
-No SC cost
-MEAN ASS sounding motor
-2 year warrantee with L99 as backup
Cons:
-Aggressive cam and higher compression makes it less streetable for an everyday driver.
-Fuel milage for an everyday driver???? Not sure what it would be.
-Issues with engine conversion
-Nearly $10,000 in engine cost alone.....

Option 1 would certainly be the most afforable but I am worried about the L99 being able to handle this added stress years down the road. Option 2 maybe the best of both worlds but certainly adds some to the cost and not sure how easy the conversion to the LSX would be for the L99. Sure it would not be a huge problem but little problems tend to add alot of cost to a project.

If I go with option 2 or 3 it will likely be a 3 year project, with the added cost so I am not overly worried about cost as I will just save up until I can afford whatever option would be bet, obviously sooner is better but reality means waiting until I can afford it. I would rather wait three years, make the right choice instead of pushing the L99 harder then it can handle and still needing to get a replacement engine down the road.

Anyway, let me know what you would do or recommend, just looking for opinions from those that have been there and done this!!! Thanks.
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Old 09-12-2010, 04:07 PM   #2
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I say option one and it has nothing to do with money. That setup works flawlessly! And more importantly, it meets your outlined goals to a t. Better than the other two do.

Last edited by Supercharged SS; 09-12-2010 at 04:20 PM.
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Old 09-12-2010, 04:08 PM   #3
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I say option one and it has nothing to do with money. That setup works flawlessly!
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Old 09-12-2010, 04:18 PM   #4
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I say option one and it has nothing to do with money. That setup works flawlessly!
this question is for the 8 cylinder guys, dont you have a four cylinder in your camaro.
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Old 09-12-2010, 04:19 PM   #5
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You forgot:

Option 4
Pull the L99 and replace with LSX454
F.A.S.T. 102mm intake manifold
Magnacharger 2300 kit
Water/meth kit
Protorque 2600 torque converter
Jannetty custom tune

That'll put you over the top for sure!! Go Big or Go Home isn't that what they say? (Of course this means I will just STAY home).

Keeping mine stock until the warranty runs out.
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Old 09-12-2010, 04:24 PM   #6
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this question is for the 8 cylinder guys, dont you have a four cylinder in your camaro.


Shhhhh! Don't let my secret out.
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Old 09-12-2010, 04:48 PM   #7
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You aren't going to hit the stock bottom end limits with option one. Guy up here in Pittsburgh has all of that done on his, plus heads and a blower cam and he's doing just fine. imo, the stock bottom end limit tends to be around the 700-750 rwhp mark.

option two.... well why would you stop at 376 ci? you could get a forged 416 for the same price? Do you not want the extra cubic inches?

option three... if you are only getting 550 rwhp out of a 454 lsx, you need a new engine builder or you did a very mild build. lol. Once you hit that 4.125 bore, power numbers go through the roof.

A big question is, how long do you think you will be happy at the 550 rwhp mark? The mod bug is very addicting. The other two options give you room to grow on, the first one, not so much. If you think will be content with the 550-600 rwhp mark... I'd say go with option 1, and add a cam in there. That way you get that "mean sound" that you want from the lsx454, but keep the costs relatively down.
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Old 09-12-2010, 05:07 PM   #8
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Have you considered a twin turbo kit?
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Old 09-12-2010, 05:28 PM   #9
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Have you considered a twin turbo kit?
I have!! I want one and am currently awaiting the arrival of my first born child to use as payment towards a twin turbo kit!
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Old 09-12-2010, 05:31 PM   #10
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You have way to big of a spread. What is your END goal. If you get a Magna then still not happy then move to the 454 your throwing money after money.

Do it right and do it the first time.
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Old 09-12-2010, 05:37 PM   #11
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I have!! I want one and am currently awaiting the arrival of my first born child to use as payment towards a twin turbo kit!

I recently got quotes for both a Magnacharger and a twin turbo kit. There is not a huge difference between the cost. A TT kit is a couple of thousand dollars more than a supercharger. So, I figured if the OP had not considered a TT, perhaps he should for the kind of hp gains he's looking for.
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Old 09-12-2010, 06:10 PM   #12
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option 1
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Old 09-12-2010, 06:13 PM   #13
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option 3.
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Old 09-12-2010, 11:04 PM   #14
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Supercharged SS,

Your care is actually the inspiration that got me thinking about what I wanted to do next. After reading about your results its hard not to do exactly what you had done. My ONLY concern is in the long term. I plan to own this car forever and I do drive it a fair amount on a daily basis in the summer, just want something that will take the continued use with a SC.
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2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages.

More to come!!
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Old 09-12-2010, 11:06 PM   #15
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kn4hey,

If I went with the LSX454 and a magnacharger, I would not need the FAST 102mm intake manifold as the SC would replace that. Maybe you ment 102mm throttle body???

Anyway, that combo would give me alot more power then I feel would be streetable on a daily basis. I may be wrong, I have never driven a car with this engine.
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2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages.

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Old 09-12-2010, 11:11 PM   #16
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Danhr,

The GMPP web site lists the LSX454 crate motor at 620 HP and 590 ft/lbs with a stock LS3 intake and tune. The FAST intake is supposed to add around That comes out to around 500 RWHP with stock intake and tune. With my add ons and a FAST 102 intake, I figured I would easily get into the 550 RWHP range.

Certainly you can build these up to be much meaner machines but I am just quoting the stock numbers offered by GMPP.

Do you have a link to a company selling the 416 forged engines just so I can do some research on them. I am not opposed to more Cubic Inches, just want to make sure the car stays streetable in the long term as its driven alot, nearly daily.
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2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages.

More to come!!
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Old 09-12-2010, 11:15 PM   #17
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Darth_emma,

I have not really considered a turbo for one reason. I have a built 2004 Duramax GMC. It is running right at 600 HP and 1000 ft/lbs of torque. Fun as hell to drive on top power setting and almost scary when launching in 4 wheel drive.

That said, I HATE the turbo lag. I have put alot of money into this truck to get rid of the turbo lag and its still there. Much better then before but its still there.

I have not driven a gas fueled car with a turbo, at least not a high performance one, maybe they have less turbo lag but I do not like it. I have driven several supercharged vettes and that is the feel I want, instant power!!

Plus, I do not belive my Roto Fab intake and Dynatech Headers would work with the Turbo system, just wasted money on those parts as I want to reuse them if I can.
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2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages.

More to come!!
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Old 09-13-2010, 07:52 AM   #18
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Darth_emma,

I have not really considered a turbo for one reason. I have a built 2004 Duramax GMC. It is running right at 600 HP and 1000 ft/lbs of torque. Fun as hell to drive on top power setting and almost scary when launching in 4 wheel drive.

That said, I HATE the turbo lag. I have put alot of money into this truck to get rid of the turbo lag and its still there. Much better then before but its still there.

I have not driven a gas fueled car with a turbo, at least not a high performance one, maybe they have less turbo lag but I do not like it. I have driven several supercharged vettes and that is the feel I want, instant power!!

Plus, I do not belive my Roto Fab intake and Dynatech Headers would work with the Turbo system, just wasted money on those parts as I want to reuse them if I can.

I went with a Maggie for the same reasons. I just wanted to make sure you had considered TT for the hp range you were looking at. I have just recently been through the exact same set of decisions you are trying to make (supercharger vs TT vs new motor, etc.). My car had a maggie installed in it last week. Good luck with your decisions!
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Old 09-13-2010, 08:09 AM   #19
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You forgot:

Option 4
Pull the L99 and replace with LSX454
102mm T.B.
Magnacharger 2300 kit
Water/meth kit
Protorque 2600 torque converter
custom tune


That'll put you over the top for sure!! Go Big or Go Home isn't that what they say? (Of course this means I will just STAY home).

Keeping mine stock until the warranty runs out.
I concur with your option and add to it a custom cam and new 1000hp axles, Lets see this happen.
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Old 09-13-2010, 08:20 AM   #20
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For option 2 and 3 you will gain some cash from selling the L99.

My say is option 1. I hate to see you burn through cash doing 2, 3 ,4 and the car isnt streetable to your likings. I have done it a few times as I have seen many others and in the end either wasted cash or started a rebuild process all over again.

You may have to view or start chatting with others in that HP range on the pro's and con's of a streetable car with that HP marks.
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Old 09-13-2010, 12:09 PM   #21
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What to do for more power?

Quote:
Originally Posted by danhr View Post
You aren't going to hit the stock bottom end limits with option one. Guy up here in Pittsburgh has all of that done on his, plus heads and a blower cam and he's doing just fine. imo, the stock bottom end limit tends to be around the 700-750 rwhp mark.

option two.... well why would you stop at 376 ci? you could get a forged 416 for the same price? Do you not want the extra cubic inches?

option three... if you are only getting 550 rwhp out of a 454 lsx, you need a new engine builder or you did a very mild build. lol. Once you hit that 4.125 bore, power numbers go through the roof.

A big question is, how long do you think you will be happy at the 550 rwhp mark? The mod bug is very addicting. The other two options give you room to grow on, the first one, not so much. If you think will be content with the 550-600 rwhp mark... I'd say go with option 1, and add a cam in there. That way you get that "mean sound" that you want from the lsx454, but keep the costs relatively down.
I say option one. Then when the L99 gets tired someday move to a 416 stroker with 9:1 or 10:1 compression, a ZR-1 cam, and 14psi of boost (just guessing).

Option one is the easiest and cheapest.


Quote:
Originally Posted by Indpowr View Post
You have way to big of a spread. What is your END goal. If you get a Magna then still not happy then move to the 454 your throwing money after money.

Do it right and do it the first time.
This is the big question, start from the top and work down or from the bottom and work up???

How easy does the LSX454 bolt in? Do all the factory accessories bolt up to the front of the motor just fine?
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