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Old 07-02-2009, 12:11 PM   #1
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415 stroker and 10 psi from a supercharger good or bad idea

My tuner wants me to have my engine stroked as well as supercharged at about 10psi.I also have arh headers, getting new heads, new cam, etc. How long will the engine hold stroking it compared to not stroking the engine. I am not looking for a race car, just something that is fast as hell on the street, but also something that im going to struggle for traction. The supercharger is a twin screw too.
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Old 07-02-2009, 12:17 PM   #2
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Use all forged components, select pistons that achieve the desired compression ratio for that boost level, use head studs and a 0.51 gasket...at 10psi it should last a long long time.
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Old 07-02-2009, 12:20 PM   #3
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My tuner wants me to have my engine stroked as well as supercharged at about 10psi.I also have arh headers, getting new heads, new cam, etc. How long will the engine hold stroking it compared to not stroking the engine. I am not looking for a race car, just something that is fast as hell on the street, but also something that im going to struggle for traction. The supercharger is a twin screw too.
By your name, are you using an LS7 block ? The longer stroke is pretty weak at the bottom of the cylinder sleeves on the LS3 & LS7 for FI applications. We have split quite a few blocks...but if you are truly going to limit it to 10 psi you should be OK. Don't over-rev it.
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Old 07-02-2009, 12:22 PM   #4
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no i decided to keep the ls3
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Old 07-02-2009, 12:23 PM   #5
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well i just got the price 12-15,000 dollars to stroke it, forget that, haha, i will stick to the supercharger. He said the stock block is fine at 10psi, but wouldn't it be better to just put new rods, pistons, etc for added reliability?
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Old 07-02-2009, 12:25 PM   #6
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Use all forged components, select pistons that achieve the desired compression ratio for that boost level, use head studs and a 0.51 gasket...at 10psi it should last a long long time.
What he said.
Forged componets.
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Old 07-02-2009, 12:26 PM   #7
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Yes, forge the internals, lower the compression and it should be fun.
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Old 07-02-2009, 12:28 PM   #8
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yea, it should be fun trying to get traction, haha
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Old 07-02-2009, 12:30 PM   #9
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well i just got the price 12-15,000 dollars to stroke it, forget that, haha, i will stick to the supercharger. He said the stock block is fine at 10psi, but wouldn't it be better to just put new rods, pistons, etc for added reliability?
The LS3 is safer with the stock stroke and more boost. Just change the pistons and rods. Good pistons - JE forged blower. Good intermediate rods - Callies Compstar.

Here is the link to your earlier thread on this topic:
http://www.camaro5.com/forums/showthread.php?t=23212

and here:
http://www.camaro5.com/forums/showth...?t=2933&page=5

and supporting data:

"Yes. The LSX block has the same external dimensions as the others, hence the "LS" designation.

Some additional info for you ls7camaro from a post a while back:

To get an LS3 to support 800 crank hp is pretty cheap, but you have to be willing to yank the engine. Change the pistons to a JE (or comparable) forged in the 8.0 to 8.8 range (your preference) and change the rods to Callies Compstar (or comparable). Put it back together and add the boost of your choice. The crank is cast, but like a Scat 9000 undercut and with fillets. Not forged, but tougher than people think. The LS3 is a 6 bolt aluminum block, with 4 bolts per cylinder clamping so past 800 hp, they may "leak" without O-ringing. In addition, pushing it past this level you may run into problems of spliting the sleeves and the material behind the sleeves. [Note: this is a problem with the LS7 also - 5 brand new blocks split this way]

To go bulletproof, an iron LSX block (6 bolts per cylinder) or if you really need aluminum, the new RHS aluminum block. Add Oliver billet rods, change to a Dragonslayer or better crank and use the same JE pistons. Bottom end now good to well beyond 2,000 hp and this has been verified on the dyno. Took the bottom apart with 90 pulls over 1,500 hp on one of these setups and the bearings showed NO signs of wear. Looked like they were just put in."

for your easy reference.
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Old 07-02-2009, 12:32 PM   #10
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but then again, he just said it will cost close to the same to forge the internals, without the stroker, so i may get the stroker. But its not a race car, so that much power might just be a pain. Especially traction wise.
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Old 07-02-2009, 12:35 PM   #11
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yea, they are easy reference, especially because i started those threads, haha i just want it to be very reliable as well as powerful
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Old 07-02-2009, 12:36 PM   #12
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but then again, he just said it will cost close to the same to forge the internals, without the stroker, so i may get the stroker. But its not a race car, so that much power might just be a pain. Especially traction wise.
If he wants to charge you 12 -15K to change the pistons/rings and rods, RUN AWAY.

Hey whatever you choose, looks like it will be a handful. Enjoy it.

One other thing from GM guys - the rearend should be good for around 650 RWHP. The first thing that will probably let loose is the 2 pinion posi. As long as you don't put on slicks you will be OK.

One other thing - did you order the auto or the manual ?

I like your phrase "struggle for traction". That would be an understatement.
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Old 07-02-2009, 12:37 PM   #13
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but then again, he just said it will cost close to the same to forge the internals, without the stroker, so i may get the stroker. But its not a race car, so that much power might just be a pain. Especially traction wise.
Stroker with the supercharger? Or just stroke the LS3?
I think traction will be a slight problem either way. Keep us posted.
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Old 07-02-2009, 12:39 PM   #14
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stroke the ls3
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Old 07-02-2009, 12:41 PM   #15
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stroke the ls3
Good choice. You will be happy. I'm a N/A guy anyways, so that would be my choice as well. PLUS, without the supercharger, one less thing to go wrong/worry about when building your engine.
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Old 07-02-2009, 12:43 PM   #16
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yea, but im more of a power adder guy, i would choose the supercharger over the stroker, especially because i already ordered it, haha
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Old 07-02-2009, 01:38 PM   #17
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I certainly would not be going with 10psi on a stock LS3....I think 6 or 7 psi will last a long time...but you throw 10psi at it and it will not last nearly as long.

I am doing the forged internal thing over the winter, and I only plan to run 10-12 psi!!
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Old 07-02-2009, 01:48 PM   #18
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thats what i am going to probabaly do as well, just my tuner said, if i do that, i might as well stroke it too.
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Old 07-05-2009, 11:50 PM   #19
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Where are you loacted? Feel free to give me a call if you need any advice of pricing on stuff.
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Old 07-06-2009, 01:06 AM   #20
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when the car gets here, the L99 is getting the maggie that is otw and paid for.
then i wish to aquire another block for some serious fun, and i want to transfer the blower over. i know of a ls7 that got one head warped with almost no miles on it. a customer of mine didnt burp the cooland well enuf, and had to buy his customer a new crate. possibilities are on the horizon with this car.
i asked this in another thread. is the intake compatible?
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Old 07-06-2009, 07:31 AM   #21
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Ditto On The Stroker

Quote:
Originally Posted by ls7camaro View Post
stroke the ls3
Quote:
Originally Posted by tones2SS View Post
Good choice. You will be happy. I'm a N/A guy anyways, so that would be my choice as well. PLUS, without the supercharger, one less thing to go wrong/worry about when building your engine.
Good choice! I am also going with a stroker. A built LS3-427 under construction. Lots & lots of torque. And they sound great! Keep us up to date with your project.
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Old 07-06-2009, 10:23 AM   #22
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i deff will. I am thinking of just running 12psi, instead of a stroker, are you blowing yours?
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Old 07-06-2009, 10:30 AM   #23
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i deff will. I am thinking of just running 12psi, instead of a stroker, are you blowing yours?
dude you can get good 416 stokers built to your specifications for $5000-6000 all day long from sdpc. no need to do heads id do a cam and port throttle body
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Old 07-06-2009, 11:18 AM   #24
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i deff will. I am thinking of just running 12psi, instead of a stroker, are you blowing yours?
All motor on mine. 4.125" stroke & 11.8:1 comp. ratio + water.methanol injection = 650 + HP. So I am about maxed out for a good street car. Complete details in the Members Journal area, under Getting Ready For My 2SS/RS, RJT, part 1 & 2.
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Old 07-06-2009, 12:15 PM   #25
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where do you get the 650, the stroker only adds like 30-50hp and 50-75 torque
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