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how much psi can the stock block handle

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Old 04-30-2012, 08:15 PM   #1
2006mustanggtowner
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Default how much psi can the stock block handle

i was just curious i have a 2006 mustang gt and i was wondering what the stock block can handle with a superchargerv for psi. thanks all info is much appreciated
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Old 04-30-2012, 08:20 PM   #2
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Supercharger? I think the general consensus is 10psi stock motor, but I also think it depends on what type of supercharger...
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Old 04-30-2012, 08:20 PM   #3
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PSI isnt something you have to watch out for as much as rwhp. In a general sense each PSI is about 10-15 hp. Either way most people say if you really "drive" your car and not like a grandma :P then stay at around 450 rwhp with a stock block. I have about 420 and hoping to get 450-460 soon. Not worried. Wont have to until the 500 rwhp marker then start replacing the rods, pistons, and the other infamous engine components that are weak stock. Again if you dont really drive your car hard you could get away with higher... but it isn't recommended.
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Old 04-30-2012, 08:37 PM   #4
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I have asked brenspeed this very question and they said 450 torque is the magic number but keep n mind people r running with a lot more and a good accurate tune is key
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Old 04-30-2012, 09:48 PM   #5
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Cylinder pressure and the associated pressures on the rods and crank are created by a slew of things. The most important thing to remember is pre-ignition knock pressures can be 100 times stronger more violent than normal combustion pressure. 5 seconds of knock is enough to trash a motor compared to hundreds of hours making 450rwhp.
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Old 04-30-2012, 10:12 PM   #6
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I've been running 500rwhp and 12 psi forever. Even launching on slicks and shifting at 6500 rpms hasn't hurt my stock block with 200ish passes at the drag strip.
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Old 05-01-2012, 01:27 AM   #7
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Quote:
Originally Posted by Diabolical! View Post
I've been running 500rwhp and 12 psi forever. Even launching on slicks and shifting at 6500 rpms hasn't hurt my stock block with 200ish passes at the drag strip.
however every time you mention it im sure you practicaly punch through your desk
<knock on wood>
lol
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Old 05-01-2012, 02:04 AM   #8
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Nah. I keep flogging the nag but she just won't die. If she ever does blow, I'm set to get a B302, but she doesn't even lose oil between changes.
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Old 05-01-2012, 02:41 AM   #9
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....are you magic? haha
wish i had the cash for a SC. but knowing my luck at 400 it would magically throw rods through the block and i would face palm
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Old 05-01-2012, 05:34 AM   #10
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It seems like at 500...

Dollars.

My wallet begins to drain haha

You must have one helluva good job for a college kid (if I got that right) to be looking at superchargers already. Might I recommend the Brenspeed 302 rotating assy. if you're really looking to get up in the numbers?

From what I've heard, it is WELL worth the money.

http://www.brenspeed.com/b302-ra2.html
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Old 05-01-2012, 05:56 AM   #11
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I have an 06 as well. Some believe from a lot of high HP and dyno sessions that the 05's and 06's had more robust internals and did not break nearly as often as the 07's, 08's and 09's. This was varified by many shops on this forum a few years back.

Since you have an 06' as I do, I finally settled on 10 psi since I don't drag race, and it's controllable power coming into and out of turns, and launching when feathering 1st gear properly. On basically stock exhaust I've been at 376rhhp@4 psi, 415rwhp@8psi, 507rwhp@14.5psi, 475rwhp@12 psi, and now 454rwhp@10psi, all tunes basically at 16 ignition timing on my Saleen series VI.

No problems so far. Knock, knock!.......on wood......... Erik
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Old 05-01-2012, 07:25 AM   #12
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thanks for all the info i think ill go with that and just run around 8psi to be safe and just buy a sct programmer and put my cold air back on and just leave my exhaust the way it i. thanks alot
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Old 05-01-2012, 12:18 PM   #13
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What blower are you planning on installing?
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Old 05-01-2012, 07:43 PM   #14
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I have an 06 and I'm pushing 10.5 psi on my with out issues but then again I don't drive my car like a moron either. If you take care of you car it will take care of you and let you run big power without much trouble. I ended up putting down 498RWHP on my auto trans at that psi and that was before we even tried to lean out the AF level. So I was hitting those numbers with an AF of 10.5 which is crazy. In the end we ended up taking out 3 degrees of timing to make it a little safer which took me down to 475RWHP range. But it was really nice knowing that my car could hit over 500RWHP with just leaning out the AF. But I will wait till I have the funds to buy a stroked 302 short block and then punch it up into the 600+ range
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Old 05-08-2012, 11:32 PM   #15
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ive been looking at the vortech superchargers the most . next would probally be a kenne belle does anyone have any other suggestions and thanks for all the help.
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Old 05-08-2012, 11:33 PM   #16
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to everyone
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Old 05-09-2012, 01:45 AM   #17
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Quote:
Originally Posted by Diabolical! View Post
I've been running 500rwhp and 12 psi forever. Even launching on slicks and shifting at 6500 rpms hasn't hurt my stock block with 200ish passes at the drag strip.
You got a good combo working for you. Not everybody else running 500HP can say the same.
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Old 05-09-2012, 05:58 AM   #18
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For me, over the last 4 years, I've been running stock internals with
11 psi, great tune, 94 octane, about 14 degrees timing, shifting at 6500, etc. etc. And, All is well so far !!
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Old 05-09-2012, 06:25 AM   #19
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Cutterwolf, what supercharger do you have?

500rwhp @10.5psi sounds like a centrifugal supercharger to me. On a twin screw with responsible timing you'd need to be on 12psi with very open exhaust to see 500rwhp with a 12.0 air/fuel ratio.
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Old 05-09-2012, 06:25 AM
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