427-593 rwhp
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Teching In
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From: mn.
427-593 rwhp This is a 98 SS with a 427 wet sump, hydraulic cam engine with a 12 bolt that I have been working with the help of TPIS, High Tech, and Dyno tune USA for some time. After lots of R+D and tuning from Andy, this weekend Andy made 592.6 rwhp with no dyno tricks and 485 rwtq. This is a street engine not a race engine. Thanks to everyone that helped out.
Very nice, Andy is the man.....on that note, is it safe to assume these are E85 numbers?
I thought Andy wont touch it unless it runs on Corn, lol.
I thought Andy wont touch it unless it runs on Corn, lol.
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Thread Starter
Teching In
Joined: Dec 2006
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From: mn.
The engine is a few years of ideas that worked and ideas that didn't work. This engine "I would say" has 80-100 dyno pulls trying heads, intakes, and cams to end up making 701 engine dyno HP. It has a hand made sheetmetal intake filled with epoxy and L92 filled with matching epoxy. The biggest thing we all learned was "PORT SPEED" is how you make big HP. Yes this car has been on corn for 4-5 years and yes it's a 6 speed. The car is still at Andy's shop, I'll call him about the graph.
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From: Western Burbs of Detroit
Port speed is exactly the reason I reused my afr 205's on the 402. Port velocity went up quite a bit, but not so much that the engine was choking. I think we hit a near perfect happy medium. Throttle response is instantaneous from what I am told, as I have not driven it yet.
Huge airflow is great, but if the intake port is so large that the port velocity goes down substantially then it is too large and will lose a lot of under curve and feel weak down low. Should most likely still make amazing peak hp, but who wants a "supra like" power curve?
Huge airflow is great, but if the intake port is so large that the port velocity goes down substantially then it is too large and will lose a lot of under curve and feel weak down low. Should most likely still make amazing peak hp, but who wants a "supra like" power curve?
Is this thing going to the track at any point? Thread Starter
Teching In
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From: mn.
allngnC5, You are 100% correct. Before we filled the intake and heads up, it still made if I remember correct about 670hp, but the engine made low TQ. and had a poor power curve, would not have been a good street engine. Bigger isn't always better, being correct is always better. There is nothing super crazy about this engine, just a alot of thought and time.
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Thanks for the compliment, I was afraid I might not get it right, sometimes its easier to think it in your mind then put it in writing.
You definately did your homework. I can't wait to see a video of your monster leaving the line, or cruising around town, or stalking the expressways.
You definately did your homework. I can't wait to see a video of your monster leaving the line, or cruising around town, or stalking the expressways.
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I agree. Got to look around and see how other peoples combo's played out too so you can have an educated basis for your head choice. Also need to consider you application. Street going to focus on the low end, strip you'll want a larger runner head for more top end. On the street you'll be in lower rpms most of the time, and at the strip you'll never have to worry about low rpms.
