Gutting upper vics manifold
#22
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One was completely closed, the other was completely open. I'm using virtual dyno to plot them... I'd love a real dyno but money is running low so i gotta settle. I think before i made more power up top with the vics in tact. I'll do few more pulls once i start tunning on E85 (just switched)
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Feel free to donate some credits to my paypal account and i'll go real dyno it at sound performance the next day they are open
My plots were done back to back... did one pull, then pressed the button to open it, did the other pull, same stretch of road 10 seconds apart. Of course there could have been some more wind the 2nd pull or ----...since this is the windy city.
My plots were done back to back... did one pull, then pressed the button to open it, did the other pull, same stretch of road 10 seconds apart. Of course there could have been some more wind the 2nd pull or ----...since this is the windy city.
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Similar to this one but mine isnt this clean to the wall.
https://www.miataturbo.net/diy-turbo-discussion-14/intake-manifold-modification-more-29501/
#30
Thought I'd put this here. You'd think this would help. While I had it off, I measured the length of the intake runners. From the start of the lower half to the top of the intake valve it's 18.5 inches (470mm) measured around the outside radius of the manifold and the head. Wow, that's a long way to travel. It seems to make sense now why the honda manifold makes better flow on the top end. I still went ahead and cut mine while I had it out, what the hell....
But from what I understand about 250-300 mm is a better option.
But from what I understand about 250-300 mm is a better option.
#32
It's called a die grinder. I bought it at Harbor Freight for about $30 a couple years ago. Beat the ---- outta it. Still runs great. Uses 1/4 in shank attachments. The lower took about three hours and beer. Use plenty of WD-40. The aluminum won't stick to the carbide cutter-win. Final clean/polish with 60 grit flap wheel. Car wash clean-up. Bolt back in. Beer.
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