3 rotor on Barrett Jackson
#30
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Originally Posted by thewird
Something has confused me here, i know its a late post and all but isn't twin turbo only capable of producing like 350-400 HP or less, I can't remember? Thanks.
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#32
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Originally Posted by NissanConvert
12lbs in a 3 rotor will yield more power than 12lbs in a 2 rotor won't it? that might account for the extra bump the 20b gets. I'd like to see the cosmo flow maps.
#33
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Originally Posted by David Hayes
Mosty definately. The 3 rotor will generate much more torque (at lower RPM ranges) and HP. The cosmo flow maps are not impressive though, at least not mine. The turbos reach max efficiency at about 5,000 RPM and run out of air from 5,500 RPM forward. The 20B should peak at about 7,000 - 7,500 RPM. The twins definately restrict the engine's performance. Would be interesting to see if the BNRs would work on the 20B.
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Originally Posted by NissanConvert
That's something i was thinking. I see a lot of the 20b's are running single turbos so i'd like to compare the 20b flow map to the 13b. change one or both of my stock twins out for its 20b counterpart. maybe bnr would do a rebuild/upgrade on the 20b stockers?
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Originally Posted by David Hayes
If you are thinking of doing this on a 13B, I wouldn't do it. I'm pretty sure about this - the 20B turbos are actually smaller (at least the secondary unit) than the 13B turbos. I also don't think the turbos would be a direct swap for your 13B. There are better ways to go (the BNRs) if you want to stay with the twins.
Given the availability of stock twin assy's you shouldn't have much trouble finding a core, and i bet the bolt patterns are the same too.
#36
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Back when I first got my 20B (about 5 years ago) I gave my stock turbos to Byran to see what he could do with them, but back then the 20b market was still somewhat new and everbody that was doing the conversion then wanted single turbos.
Originally Posted by David Hayes
Mosty definately. The 3 rotor will generate much more torque (at lower RPM ranges) and HP. The cosmo flow maps are not impressive though, at least not mine. The turbos reach max efficiency at about 5,000 RPM and run out of air from 5,500 RPM forward. The 20B should peak at about 7,000 - 7,500 RPM. The twins definately restrict the engine's performance. Would be interesting to see if the BNRs would work on the 20B.
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stickmantijuana
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09-22-15 07:39 PM