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Post by shelbyracing on Jan 19, 2012 10:01:44 GMT -6
I'm not sure anyone on here isn't stand up.. But are you saying you have an extra snake bit book? I would like to read it.
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Post by caleditor on Jan 19, 2012 10:19:00 GMT -6
I'm not sure anyone on here isn't stand up.. But are you saying you have an extra snake bit book? I would like to read it. email me your address. caleditor@pcmcalibrators.com
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Post by shelbyracing on Jan 28, 2012 9:01:41 GMT -6
Just read the chapters I was curious about. They clearly say it is 320 HP, and it is capable of 345 but the loss of torque makes it slower. Also the supercharged engines had no additional modifications, as that would have cost more money.
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Post by caleditor on Jan 28, 2012 9:20:10 GMT -6
I thought that I quoted from the book and gave page numbers. If you have my old book that I read and not the brand new book look for a page near the back that the book will open to easily and read about the guy that dyno'd his car. He look in the back of the book at the glossary for X50
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Post by shelbyracing on Jan 28, 2012 9:36:18 GMT -6
The X50 engine was 370 HP but didn't pass emissions that way, and a customer reported 270 whp.
That suggests 320 HP.
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Post by caleditor on Jan 28, 2012 10:00:27 GMT -6
The X50 engine was 370 HP but didn't pass emissions that way, and a customer reported 270 whp. That suggests 320 HP. The GM guy said he thought it would be 370 And the 320 is with a Super Charger
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Post by shelbyracing on Jan 28, 2012 10:07:02 GMT -6
No, read page 227. And Supercharger was 420. The test model s/c was 455+ Test model ran 11.35 in 1/4.
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Post by caleditor on Jan 28, 2012 10:08:27 GMT -6
No, read page 227. And Supercharger was 420. The test model s/c was 455+ The very upset customer that dyno'd his car?
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Post by shelbyracing on Jan 28, 2012 10:09:25 GMT -6
Yeah, he just had the claimed 370hp.
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Post by shelbyracing on Jan 28, 2012 10:11:13 GMT -6
Mine isn't complying with emissions, lol.
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Post by shelbyracing on Jan 28, 2012 10:15:47 GMT -6
X50 was a special performance package, and had special brakes. It was supposed to be 50 more HP. These cars weren't certified either being post 2000.
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Post by shelbyracing on Jan 28, 2012 10:38:10 GMT -6
Technically his test car was 500 HP with a 45 HP air compressor. And I've had people ask me about those electric s/c's its funny they don't understand him much power they require. That is why turbos result in much more power, while they don't produce more they just use less.
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Post by shelbyracing on Jan 28, 2012 10:57:58 GMT -6
Shelby American paid 4,000 per engine from gm.
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Post by caleditor on Jan 28, 2012 11:15:01 GMT -6
Keep reading Like I said the book has a lot of good information in it. I also have Bean Counters vs Car Guys, but only the audible book
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Post by caleditor on Jan 28, 2012 11:16:05 GMT -6
Sorry I couldn't get back to you sooner I was meeting with the owner of the 66 427 Vette this morning and going over all of the additionals
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Post by shelbyracing on Jan 28, 2012 11:22:23 GMT -6
I wanted to hit the main points first, I have been busy with making a 5' bush hog a self powered, crank height adjusted, pull behind. Mounting a 16,000 lb winch on a tractor. And making the 1/2" steel brackets. Also I started a forum and project on our fuel tank when the fuel pump brackets rust out. I made a new one.
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Post by Aurora40 on Jan 28, 2012 11:42:47 GMT -6
Shelbyracing, what is your point in all of this? Are you trying to convince us the Shelby crate motor is a monster, or yourself?
The Shelby motor is a steal for a factory new crate motor. But that's all it is. If you think you are making some ungodly power, or that the Shelby modifications put it in the same ballpark as the Ferrari F50's 500+hp, 8,500 rpm V12, I think you are on your own.
If you want to convince others, you'll need more than cherry-picking quotes from a book (I read the book, the message in it is clear) or speculating about magazine 1/4 mile times. Post up some scorching 1/4 mile times of your car or something. The argument is getting old.
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Post by caleditor on Jan 28, 2012 11:48:48 GMT -6
Enjoy the book Send the $5 when you have time.
And call me when you have a chance please
It cost $17 to ship and that was my mistake I was at the UPS store and I should have just waited to mail it.
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Post by shelbyracing on Jan 28, 2012 12:01:36 GMT -6
Not my point at all, people are discrediting what they have proved it can do. This engine is not some piece of garbage in comparison to modern v8's. Mine is probably 275-290@ the crank, I believe it is anyway. The only thing Shelby did was headers and intake cams. Probably timing on the cams too.
All I want is to get the most out of what I have, this forum says it is not 320 HP at 6,500 rpms. Yet a dyno graph is posted showing about 320 HP at 5,600. I just want to know the facts. And yes with the right amount of money and will power obviously you can build a monster. It would destroy the trans, and you would have a lot to figure out but I wanted to answer the question everyone wants to know. Which is yes you can get a substantial amount of power out of these engines.
I will never see it I'm sure. I just wanna get the most out of what I've got. I don't know what it is, and if I can't get a tune I never will know. It will be a while before I know what I can do, I am not rich. It will not be a monster, but I will not be slow. Ninefivefour's build will probably be faster than mine, but a few others act serious about wanting to apply boost figured that question wad answered too.
I am being completely misunderstood, there is potential and that is all I'm saying.
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Post by shelbyracing on Jan 28, 2012 12:05:29 GMT -6
I wish I had made my username different, I feel it makes me sound obnoxious and I am not.
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Post by caleditor on Jan 28, 2012 12:18:41 GMT -6
Not my point at all, people are discrediting what they have proved it can do. This engine is not some piece of garbage in comparison to modern v8's. Mine is probably 275-290@ the crank, I believe it is anyway. The only thing Shelby did was headers and intake cams. Probably timing on the cams too. All I want is to get the most out of what I have, this forum says it is not 320 HP at 6,500 rpms. Yet a dyno graph is posted showing about 320 HP at 5,600. I just want to know the facts. And yes with the right amount of money and will power obviously you can build a monster. It would destroy the trans, and you would have a lot to figure out but I wanted to answer the question everyone wants to know. Which is yes you can get a substantial amount of power out of these engines. I will never see it I'm sure. I just wanna get the most out of what I've got. I don't know what it is, and if I can't get a tune I never will know. It will be a while before I know what I can do, I am not rich. It will not be a monster, but I will not be slow. Ninefivefour's build will probably be faster than mine, but a few others act serious about wanting to apply boost figured that question wad answered too. I am being completely misunderstood, there is potential and that is all I'm saying. Sorry if I made you think that I thought they are garbage. I used to be a huge Northstar supporter. I am a GM world Class certified Tech and I worked at a Caddy dealer for 6 years and then went to a Chevy Caddy dealer. I will look for the link that shows when I turned the page on Northstar's, but I have a Northstar in one of my cars and I have 2 more in the garage. I have a lot of parts -- I mean a lot of parts. I have brand new cranks and heads. Very sorry about that.
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Post by caleditor on Jan 28, 2012 12:22:45 GMT -6
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Post by caleditor on Jan 28, 2012 14:10:42 GMT -6
X50 was a special performance package, and had special brakes. It was supposed to be 50 more HP. These cars weren't certified either being post 2000. I am wrong. I thought the X50 was a supercharger kit, but it looks like it was not. Shelby or GM claimed Base claimed 320 hp X50 Performance package claimed 370 hp The customer that dyno'd the car had a X50 performance package and the car dyno'd at 270 rwhp When I grabbed the book last week I just looked up the X50 dyno information. I am getting old and my memory could be better. For some reason I had it in my head that the X50 was the supercharger package. I never even looked at what the X50 was this time. It had been years since I picked up this book
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Post by Aurora40 on Jan 29, 2012 8:54:30 GMT -6
Not my point at all, people are discrediting what they have proved it can do. This engine is not some piece of garbage in comparison to modern v8's. Mine is probably 275-290@ the crank, I believe it is anyway. The only thing Shelby did was headers and intake cams. Probably timing on the cams too. All I want is to get the most out of what I have, this forum says it is not 320 HP at 6,500 rpms. Yet a dyno graph is posted showing about 320 HP at 5,600. I just want to know the facts. And yes with the right amount of money and will power obviously you can build a monster. It would destroy the trans, and you would have a lot to figure out but I wanted to answer the question everyone wants to know. Which is yes you can get a substantial amount of power out of these engines. Who said anything about garbage? It's a nice smooth 250chp V8 with great sound. Shelby did everything to the engine to reach a claimed 320hp. GM sold them 250hp crate motors. Which is what Shelby American sold off in bankruptcy. Who thought you couldn't make power from anything given enough time and money? How have you answered that for anyone? This company has been making big power from Northstar motors for at least 10 years: chrfab.com/ I think most of us have been aware of it. So I don't think anyone doubted that.
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Post by shelbyracing on Jan 29, 2012 9:21:32 GMT -6
It just seems like no one seems to believe these motors can put out over 300 hp. Some of the engines did have the cams, I am going to check mine. I thought this thread was about the performance shelby series 1 engine. What they had done to it. And if it actually had the hp, or about how much it had.
I was pretty sure the supercharged model was greater than 320 as well. The car dyno'd in the book wasn't sae certified, it was supposed to have had additional mods to get 50 more horse and it had 0 more if the base model was certified.
So if it was true the supercharged version was 320 who in their right mind would go through so much work to get a forced induction engine with such little gain. I know I wouldn't waste anymore thought on it.
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Post by Aurora40 on Jan 29, 2012 9:48:40 GMT -6
None of us own a Series 1. So no one here can say what kind of power they put down in real life. I think the Shelby part has been pretty established. Most of the info is in the book you have, and the stuff that isn't (like how/if they modified an S/C engine), no one seems to know. The base engine was a claimed 320hp. That somehow happened through L37 cams, custom tuning, a higher redline, and a much less restrictive exhaust. They claimed 450hp for the supercharged motors. It seems few were produced, and the reliability is certainly questionable. Car and Driver popped pistons on their test of one. Then the X50 claimed 370hp, apparently solely through tuning. As stated, one customer was quite irate at the actual output of his X50 car. However, these cars were sold over a period of years, and eventually as "kit" cars. Shelby was literally engineering the car even as they were delivering them. So getting details about exactly what they did, or exactly what they were claiming at any given time, is difficult. Plus it was incredibly low volume. They sold like 250 total cars. So they were exempt from most normal regulations and whatnot. They were pretty desperate to sell cars, so I think they'd claim just about anything if it would get you to write a check. You are right, most of us don't believe that the Shelby crate motors make over 300hp. Because they were just GM crate motors, and GM was pretty clear on the power they make. If you want to prove your Shelby motor makes more than 250, you're going to need some empirical evidence.
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Post by shelbyracing on Jan 29, 2012 10:20:07 GMT -6
Okay, I agree with that. Only I was talking about 300 crank HP through exhaust/ intake mods, and tuning. That's 228 whp assuming 24% reduction. I'll just have to wait and see. I'm going to try and get this done before my bday in March.
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RCA1186
Administrator
Rob
Go Pack Go!
Posts: 4,837
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Post by RCA1186 on Sept 22, 2017 13:31:55 GMT -6
Dredging up this old thread with this : www.shelbyengines.com/collections/complete-engines/products/shelby-series-1-aurora-crate-engineI've been skeptical that these motors were ever anything more than crate motors bought by Shelby with the intent to go into the Series 1 (i/e untouched to this point) This link seems to claim modified to 320hp, although with the stock intake as shown I'd really doubt that number. I wonder if you could dyno the motor.... There seems to be 5 available (according to eBay where they are also listed). I'd never pay that much for one not knowing the history or if anything was ever even done to it.
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