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.

Great numbers!!

Mod list?

Wow, congrats!! You have a graph? Must pull to 7k no problem.

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.

this is exactly why there is NO POINT to building a Small Block Chevy gen-I anymore.

I'd like to see a graph and a mod list on this one !! She must be a screamer.

^very nice ^ Clay has help me out a lot over at TPIS. Where do you live.

nice power

Pretty stout #'s.

Got torque?? Car must be a M6 right? Rev that thing to the moon!

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.

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?

Damn, that's impressive. Would love to see a graph and a full mod list. :nod: Is this thing going to the track at any point?

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.

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.

Over 100 hp lost through the drivetrain, that's a heart breaker.

What kind of exhaust did you have on the headers on the dyno and then in the car?

Congrats on your accomplishments!

Whitch heads had the best port speed?

Small cc that flow large cfm

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.

You know you're going to have to post some pictures.

tell us more, what brand dyno, what does your drivetrain consist of?