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Originally Posted by KarTek
Sounds ambitious! You're doing it right with all the extra attention to detail. I'm too lazy at this point to put all the extra stuff into the engine since I'm not going all out on the power.
I hear you on the cold. I just kind of hibernate in the winter and it's just getting warm enough now for me to get interested in doing stuff out in the shop again.
I'm very disappointed that the outlet is only 1.5"... I was hoping it was up around 2" with room to hog it out a little more. I'm trying to get about 3.5 Sq in. area out of it so I can avoid building a manifold from scratch. does it look like there's enough room to hog it out an extra 1/4 " all around? Probably not since it's a factory piece made to pretty tight tolerances. Wonder if I could hog it out and then get it extrude honed? I just really want this project finished since I've been working on it for years now.  |
Well, as this car is, errr....was, my daily driver, I'd like to have it back under that moniker asap. There is some urgency besides my desire to turn the key the first time! I really want to get all the major internal engine work done so that I hopefully don't even need to open the engine up again. Exterior parts I might give passage to for the sake of getting it going. Like sticking the stock 603 pump on it for temporary. If I can, it'll go to Sweden to visit Goran before the first start
I was thinking about trying to use the stock exhaust manifold as an interim part but the outlet is so pitifully small and I'm going to use a 60mm inducer Turbonetics T60-1 with a T4 flange. So it would require a goofy adaptor tube, plus adding a wastegate port, etc, etc. And all that when I want to replace it with a proper pulse tuned header down the road.... I'll just save the delay and build the header now. More work and money but such is life...
I don't think theres nearly enough room to cut 1/4" out of it. I was rather disappointed by how dinky it was and the non-standard 3-bolt pattern. You might be able to improve it a little bit, get a porting kit, some flapwheels, etc. Not going to get to all of it. I don't know what a manifold would cost but I had ExtrudeHone do my Duramax injector nozzles, honed 50% over stock, and it cost me north of $600
It's not cheap, its a really good service but yeah. I would guess about $300-400 to hone one of those. About 1/3 to 1/2 the cost of a header if you bought one. I did a little reading on the STD forum and supposedly the max seen made with a stock manifold was about 450hp. I wonder what the EGT's were! Thats all hearsay. I did also have the idea of cutting off the stock 3-bolt flange about flush with the tubes and buying a cast iron T3 or T4 adaptor off fleabay and cutting one end of it off and match fit the holes. Either me or someone experienced with welding cast weld it up. Need a proper preheat and post heat which the best I could do is my shop stove