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Old 08-01-2009, 08:40 PM   #1
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Default 800 HP naturally asperated

Can it be done?

We are trying to make 800+ hp naturally asperated.

Our CI max is 440

We are thinking about using a LS7.

Would like to stay EFI but will go carb if we half to.

Any suggestions
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Old 08-01-2009, 08:47 PM   #2
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I am sure anything can be done. The question is how much money are you willing to spend for a NA setup??
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581hp/537tq..................10.332 @ 135
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Old 08-01-2009, 08:54 PM   #3
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whats your budget? that will be a deciding factor?

your gonna need something a long the lines of this
Click the image to open in full size.

440lsx
HRE sheetmetal intake with twin dominators
GMPP LSX 6 bolt heads (i think DR heads) 2.20 intake valves 1.65 exhaust valves
jesel 1.8 shaft rockers
diamond pistons 14:1 compression
282/304 .970 lift 114LSA cam
custom 2 1/8" to 2 1/4" stepped headers into a 4" collector

830hp at 8200rpm 620tq at 6200rpm on motor 1330hp on a single stage 450 shot of laughing gas
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Old 08-01-2009, 09:49 PM   #4
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^^^^^Holy ****
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Old 08-01-2009, 10:34 PM   #5
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Hey SS Perf,

You won't something that radical. Shoot me an e-mail and will be more than happy to help you with anything you need.
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Old 08-01-2009, 10:34 PM   #6
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I dont think it would take that much... I would have thought that thing would make more than 830 NA..

Just for a idea, 6.0L block, 4.100 crank 13.2 to 1, all pro hurricane heads with some port work, solid roller 27x/27x 7xx/7xx 10xlsa cam, out of the box super victor intake shaft mount rockers and all the other good stuff.... Almost 800 horse NA. but My engine builder is pretty proven with NA setups, or nitrous and just about everything else lol... I dont want to give exact numbers just yet.

and its going into a Nova this winter.. small tire car. should be fun with a 250 shot! lol


so with 440 cubes and the right engine builder, I'd say its easy....
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Old 08-01-2009, 10:43 PM   #7
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Only bad thing is a 4.1 stroke in an iron block is not a good idea. the iron 6.0 has an extremely short skirt.
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Old 08-01-2009, 10:52 PM   #8
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Quote:
Originally Posted by RS_SS69 View Post
^^^^^Holy ****


Yeah, what he said. LOL That thing is nasty.
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581hp/537tq..................10.332 @ 135
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Old 08-01-2009, 10:53 PM   #9
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if it were me i'd do something like this

LS7 block 4.125 bore
eagle ls7 forged 4.1 stroke crank
callies rods
diamond -2cc pistons
prc cnc LS7 heads with ARP studs
custom cam
port matched GMPP EFI single plane with a 4150 style TB
2"-2 1/8" stepped headers into a 4" collector
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Old 08-01-2009, 10:56 PM   #10
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All Pro Hurricane heads on a 416" inch LS3, single 4500 carb, cast P.I. intake, 26X, 27X cam on a 112 and your there.
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Old 08-01-2009, 10:59 PM   #11
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Well that isn't too bad. I thought it would take alot more than that. Good luck to you.
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Old 08-01-2009, 11:14 PM   #12
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Are you wanting 800 rwhp or 800 fwhp? It's not to hard to hit fwhp with all the good LSx parts these days.
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Old 08-01-2009, 11:54 PM   #13
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Quote:
Originally Posted by Cliff View Post
Are you wanting 800 rwhp or 800 fwhp? It's not to hard to hit fwhp with all the good LSx parts these days.
X2....my 454 is pretty mild all thing considered, pump gas, hydraulic roller, NA, 11.4:1...it'll clear 700fwhp, probably 750ish really with a good intake on it.


If money is no option, ET Canted heads and custom everything else around it them...actually i would bet that setup would be closer to 900fwhp...if done right. It's all about the money and who spec's everything out.
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Old 08-02-2009, 12:57 AM   #14
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Quote:
Originally Posted by Pwebbz28 View Post
Only bad thing is a 4.1 stroke in an iron block is not a good idea. the iron 6.0 has an extremely short skirt.
Yeah I know this... but everything worked out just great

eagle 4.100 crank, 6.125 rods, and wiseco pistons.. after all was said and done they said it was better than some of the other setups they have ran (like a 472 small block chevy) and it made upwards of 800 horse and had a 300 hit on it for a very long time..

AGAIN, with the right engine builders, it can be done..
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Old 08-02-2009, 01:42 AM   #15
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Quote:
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All Pro Hurricane heads on a 416" inch LS3, single 4500 carb, cast P.I. intake, 26X, 27X cam on a 112 and your there.
Could you street this motor, not DD but if you really wanted to drive it around how hard would it be to run a 800hp motor?
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Old 08-02-2009, 01:59 AM   #16
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Quote:
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Could you street this motor, not DD but if you really wanted to drive it around how hard would it be to run a 800hp motor?
hard on the pockets for the race gas and valve springs lol...
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Old 08-02-2009, 02:04 AM   #17
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hard on the pockets for the race gas and valve springs lol...
LOL minus the race gas, how often would the springs go?

It would just be fun to take it to the local sonic on friday nights and maybe a cruise for the hell of it
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Old 08-02-2009, 02:18 AM   #18
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Quote:
Originally Posted by ss performance View Post
Can it be done?

We are trying to make 800+ hp naturally asperated.

Our CI max is 440

We are thinking about using a LS7.

Would like to stay EFI but will go carb if we half to.

Any suggestions
Why would it be hard, its been done already. Just can't use a typical plastic intake.

You'll get there easier with an ITB intake like this guy used. He made 750 RWHP on a chassis dyno, yes, RWHP, and he can drive it daily no problem. It is a 454ci with a 650lift 260 duration @50 on a 114ls on 1.7 ratio cam, 372cfm AFR heads...E85 fuel...600 rpm idle. But you can use race gas.

His tranny obviously gives him ALOT less drivetrain loss than us though.

His Harrop intake made 61 hp over his Wilson sheet metal. Totally streetable as a daily driver.

http://www.streetfire.net/video/GTM-...ETC_184408.htm

.
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Last edited by LS6427; 08-02-2009 at 02:27 AM..
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Old 08-02-2009, 03:18 AM   #19
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800 hp is not easy on pump gas but is possible on a big engine with really good heads.

On race gas it's very easy with any number of heads and a moderantely big engine.
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Old 08-02-2009, 12:28 PM   #20
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Quote:
Originally Posted by LS6427 View Post
Why would it be hard, its been done already. Just can't use a typical plastic intake.

You'll get there easier with an ITB intake like this guy used. He made 750 RWHP on a chassis dyno, yes, RWHP, and he can drive it daily no problem. It is a 454ci with a 650lift 260 duration @50 on a 114ls on 1.7 ratio cam, 372cfm AFR heads...E85 fuel...600 rpm idle. But you can use race gas.

His tranny obviously gives him ALOT less drivetrain loss than us though.

His Harrop intake made 61 hp over his Wilson sheet metal. Totally streetable as a daily driver.

http://www.streetfire.net/video/GTM-...ETC_184408.htm

.
I've seen this video before and have heard his calms of make 750 rwhp but I really cannot believe it. I would love to see a dyno graph or something to help back up the numbers. I've had a Harrop intake on my 427 and it did not make the same power a fast 90 did. Granted, we did not mess around with the intake more then a couple weeks as we were getting ready for a race and took it off but I was greatly disappointed with the results and still have a hard time believe the Harrop's make big power as claimed.
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