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I am pleased to be part of the Corvette forum. The membership seems to have a keen interest in high-performance engine's, to say the least.
If you are planning to upgrade the performance of your engine, you will find great value in a subscription to HeaderDesign.com . A header-based exhaust system can be designed to exactly match your Corvette's engine specs and operating requirements.
If you have questions about headers and collectors in general, or the interaction between headers and the rest of your engine, just post it and I will try to answer it.
HeaderDesign.com is an engineering company. We currently support naturally aspirated gasoline engines. I wrote the header design program primarily with performance engines in mind, but the program is flexible enough to handle huge displacement engines with peak horsepower down at 2500RPM, race engines and little engines with peak horsepower up to 10500RPM, and everything in between. That covers about 200million engines in this country, and as far as I'm concerned every one of 'em needs a good set of headers.
I will add header designs for turbocharged applications if the interest warrants. Maybe supercharged, nitrous, and alcohol too.
The reason I ask is that there is a shortage of skilled shops/companies that do this. Though limited in application, it's a highly profitable design/manufacture/build process. People pay thousands and thousands of dollars getting header/turbo/intercooler systems built...
Hi Rodney! Really glad to have you on the forum! I look forward to seeing what you can offer.
I have a set of Exotic Muscle headers for my LT4 that I have yet to install. You've got my attention. What can you do to customize them for my setup? Do you complete the work yourself, or do you simply sell the plans?
Sometimes I pretend I can use all the welding equipent in the shop, but Header
Design.com is actually an engineering company. Use the Header Design Program, included with your $25 year subsription, to check the applicability of your headers to your engine and operating RPM range. If you have changed the stroke of your engine, the header will definitely change from the 350 configuration. Make sure you get the collector diameter and length to the crossover right too.
Tubular headers are the one part of the engine that you can make exactly right in length, and to a lesser extent in diameter. Intake manifolds tend to go up in big performance steps, unless you make them yourself. Camshafts go up in medium performance steps. If your headers are way off, the money you spend on HeaderDesign.com will be well spent. Changing to good headers can make you think you've changed the whole engine, but I doubt any headers made specifically for Corvettes are too far off in size.
Welcome aboard Rodney :cheers:
I have a question for you. I am building a 350 TPI, using TPIS Big Mouth intake, ported plenum, LPE large tube runners, I will eventually upgrade to a 52mm Throttle Body, K&N filter w/ cut lid, cam w/ about a .500 lift (still waiting on cam specs), 24 lb Lucas injectors, and AFR 190 street heads. I currently have Flowmaster mufflers (not sure of the series) with stock LT-1 tips welded on, and I have SLP LT-1 1 3/4" shorty headers w/ 3" collectors.
I want to run a true dual exhaust to the existing mufflers. What diameter pipe should I run, where would be the best spot for a crossover pipe (H, X ???) and where would a good location for cutouts be?
Sounds like your car is really going to fly. Those AFR heads flow 260I/190E, which combined with a roller cam should put your horsepower well up over 400. Can you estimate your horsepower and peak horsepower RPM for me?
Although you can work in some favorable gas dynamics with manifolds and shorty headers, combined with a chamber or crossover(h-pipe,y-pipe,x-pipe), I recommend long-tube headers for performance engines. Also the 3" collectors sound huge. If a street-driven v8 performance car actually needs 3" collectors to work its best, it is a seriously scary car indeed.