High CR, 382cid, and 500HP of nitrous ... Need a cam
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Gold Phoenix, not sure I am tracking with you...You want a 382 stroker, one that has the ring lands relatively close to the rod pin, and then you want to nail it with a FIVE HUNDRED shot of N2O? WTF, dont bogart that shishi man, puff puff pass.
For real, I know I am a little crazy, throwing 200shots on a stock engine w/cam only, and want to build a small 347 with a 300shot DP. Maybe its just me, but I am thinking 500shot, DP, even if it Progressively Controlled is going to kill you. You might invest in a C5R block, and I would say stay away from having the ring lands into the Rod pin area, low is good for this setup, but 382 stroker pushes your strength too much.
For real, I know I am a little crazy, throwing 200shots on a stock engine w/cam only, and want to build a small 347 with a 300shot DP. Maybe its just me, but I am thinking 500shot, DP, even if it Progressively Controlled is going to kill you. You might invest in a C5R block, and I would say stay away from having the ring lands into the Rod pin area, low is good for this setup, but 382 stroker pushes your strength too much.
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500 DP shot? your engine is gonna go. What do you expect to run with that thing? My buddy has a Chevy II that runs 8.20s and hes got a two stage 150 and 400 shot on a sbc 383. You plan on running sevens? I think your nuts the most ive heard on a LS1 is 300 DP. But hey its your engine just make sure to invest in a shovel for pick up the parts at the track.
#7
Most ring lands for nitrous are .300" below the top of the piston. That leaves .835" from the top ring to the center of the wrist pin. That is alot of room in my opinion. Besides, what is Agostino Racing throwing at their 427cid motor. To get their kind of trap speeds they need about 1000HP with a 3700lb car. The compression height on their motor is the same as what I am looking at on my 382. As for the block, all they did to a re-sleeve is just that. Bore out the old cylinder and then some, then install a BIGGER sleeve. The block isn't any stronger that before. And of course, I am going to build the motor with all forged internals, ARP studs, and billet main caps. I am sure the motor will handle the power. As far as how fast I want to go, as fast as it will take me.
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#8
The Bull
The most ARE has sprayed, or claimed to have sprayed, was 400. The car weighs in at the bottom end of 3200 or so. 500 HP on any of our motors is going to certainly squirt out the cylinder head. You could run 1/2" head studs, if you could fit them, and still have that problem. Let alone the fact that you are going to spit your six speed right out the *** end of the car. Don't think I don't know that either, I've done it with the same setup your proposing.
Honestly, a little work on your suspension is probably in order. For every dollar spent on the motor you'll need another dollar in the chassis and driveline of the car. So get your checkbook ready. You can certainly go fast, but if you want to do it repeatedly or only once will ultimately dictate how much you spend.
Let me know if you have any questions, I'll gladly tell you what it took.
Honestly, a little work on your suspension is probably in order. For every dollar spent on the motor you'll need another dollar in the chassis and driveline of the car. So get your checkbook ready. You can certainly go fast, but if you want to do it repeatedly or only once will ultimately dictate how much you spend.
Let me know if you have any questions, I'll gladly tell you what it took.
#9
Well, at that kind of power level a built TH400 will be in order as well as suspension mods. I checked out your website. How much are you spraying with your setup? I assume that your crank is a forged piece. What are your cam specs? What is the idle quality like? Do you have a sound bite of the new motor? What does your engine dyno at? Any other bolt-on?
#10
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honestly, if you what to spray a 500 shot, you will need atleast 560-600hp NA in order for it to work. i am not saying it is impossible but it is just pure phisics. this will ofcoarse put you at 1100-1200hp and you will be one of the fastest LS1s in the world. if you are like most of use on the board, after all the bolt ons and a good heads and cam combo you will be around 400-450hp. that with a 300 shot will put you into the 9s easy. once you start spraying over 75% of what you make on motor, you are going to start having problems but will good tunning it can be done. once you start getting to 100% you will just start to lose power the more you spray it. this is due to the fact that you motor will not flow enough air to phisically get more nitrous in it. this is, of coarse, just a rule of thum not a exact fact but is a very dependable theory. i have seen plenty of 500 shot cars before, but most of them are 7 second big block nitrous kings. i wish i can have one of those cars.
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ARE ran the c5r heads with a custom intake and a 400 dp shot. That motor made like 589 hp and 660lbft na. Look at the article in this months chevy high performance. This is definately not a street car, so idle quality should not even factor. It just doesn't seem like this would be cost feasible with all the fabrication, suspension, and cage. You would need a total frame off update to make this work. If you need to ask questions like what cam to buy then you are definately not ready for an 8 second car build up. Just my .02 though from experience.
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Well...hopefully in a months time ill be spraying a 400 shot in three stages rpm based.
If you plan to even approach a 500 shot your gonna have to think long and hard about how that shot is delivered to have any chance of making it work.
As far as only being able to spray an equal amount of HP that you are making NA...We tested that to a degree.
If you have EFI live or similiar you can log MAF flow rate on motor. Then spray a wet shot behind the MAF and measure the difference in airflow due to the nitrous and fuel displacing the air that would normally be making its way through the MAF. At some point you will reach 100% nitrous/fuel and no air will be being sucked into the intake.
But from looking at what we recorded so far..it looks like that theoretical limit is HUGE. Like a 400 hp motor should be able to ingest like three times that in nitrous. I think the smaller gains in superhigh shots is probably more a tuning issue.
If you plan to even approach a 500 shot your gonna have to think long and hard about how that shot is delivered to have any chance of making it work.
As far as only being able to spray an equal amount of HP that you are making NA...We tested that to a degree.
If you have EFI live or similiar you can log MAF flow rate on motor. Then spray a wet shot behind the MAF and measure the difference in airflow due to the nitrous and fuel displacing the air that would normally be making its way through the MAF. At some point you will reach 100% nitrous/fuel and no air will be being sucked into the intake.
But from looking at what we recorded so far..it looks like that theoretical limit is HUGE. Like a 400 hp motor should be able to ingest like three times that in nitrous. I think the smaller gains in superhigh shots is probably more a tuning issue.
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No, Derty doesn't have a forged crank, yet. He is running the stock crank. You'll be fine with it, unless you have the extra $$ to throw at a forged crank.
The stock one seems to be holding up just fine in mine, so far.
The stock one seems to be holding up just fine in mine, so far.
#15
The Bull
Originally Posted by Gold Phoenix
Well, at that kind of power level a built TH400 will be in order as well as suspension mods. I checked out your website. How much are you spraying with your setup? I assume that your crank is a forged piece. What are your cam specs? What is the idle quality like? Do you have a sound bite of the new motor? What does your engine dyno at? Any other bolt-on?
Here's a video of me getting the car off the trailer. Video. On motor the car only made 410 RWHP on a Mustang dyno through the turbo 400. But if you do the math with a raceweight of 3500 and 9.51 @ 145 or even 147 MPH you'll see what it actually takes. I hope you have a very deep wallet. This big of a jump definitely was not cheap by any stretch of the imagination. You'd be better off starting with a $2k V6 junker camaro off from e-bay to save yourself some heartaches with a daily driver and lower your cost of the vehicle a bit.
#16
Well, I know there are some turbo/supercharged LS1 motors out there pushing to the 1000HP range (btw I am not saying RWHP.) If you figure a 20% power loss in the drivetrain, I might see 800RWHP. There are turbo cars putting 750RWHP to the ground. I didn't want to goto big stroker due to the medium flow of the heads by comparision. I am not going just jump to the 500HP shot, but I would like to get there. So with that all out, let's get back to my original question. What are some cam suggestions for this kind of setup with Stage 3 LS6 heads, 12.5 CR, 382cid, and heavy nitrous?
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Damn, all this nitrous talk is getting me excited.
I wonder what my car is gonna run with a dual stage 300 on it at full weight.
Any guesses??????
I'm dropping it off at Norris Motorsports first week in January to get started on the re-ringing. FINALLY!!!!!!!!
I wonder what my car is gonna run with a dual stage 300 on it at full weight.
Any guesses??????
I'm dropping it off at Norris Motorsports first week in January to get started on the re-ringing. FINALLY!!!!!!!!