Long-rod BP build underway
2 Attachment(s)
https://www.miataturbo.net/attachmen...ine=1330030904
Long connecting rod 1.9-ish-liter built VVT BP is being done on Edmunds' green hoopty '97 whine and cheese edition. It'll be a little while before all the bits are in place but it's coming together... http://blogs.insideline.com/roadtest...d-nerdery.html |
You appear to have the best job evar.
Keeping the Rotrex? |
compression ratio?
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Getting the longest rod to stroke ratio is a design mantra seriously, though, very cool read. love ---- like this, as it feeds my inner nerd with the stuff that i love understanding but will likely never implement. |
in for cool new stuff
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OO ooo OOOOHHHH. I. LIKE.
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Tasty.
One day. One day I will have a bit of time and money to mildly build a short block. |
EO2K- am ginning up a turbah
y8s- 9:1 |
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Nice job Jason. Ben trying to research this myself. Talked to J&E, they seemed very willing to work with the customer. So, did Mil-spec end up being a custom rod? What kind of pricing did it work out? What bore did you go out to?
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How do you get to 1.9 from 1.8 without changing the crank and without lowering the compression ratio?
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Originally Posted by JKav
(Post 839479)
EO2K- am ginning up a turbah
y8s- 9:1 what order of magnitude for such precious internals kit? Most of us are thinking "supertech and those chinese guys can supply rods and pistons for like 700 for all of it" |
Originally Posted by triple88a
(Post 839520)
How do you get to 1.9 from 1.8 without changing the crank and without lowering the compression ratio?
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http://www.motoiq.com/magazine_artic...th-matter.aspx
What does a rod like that cost? I have a buddy who just popped an engine, it might be cool to get some of these if the price is right. |
What are Honda rod ratios compares to our BP "slugger"? Is the higher rod ratio of the F20 the reason the S2k feels a bit sluggish below 5000rpm?
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Originally Posted by hustler
(Post 839561)
What are Honda rod ratios compares to our BP "slugger"? Is the higher rod ratio of the F20 the reason the S2k feels a bit sluggish below 5000rpm?
BP: 1.56:1 S2000: 1.82:1 Chevy 350: 1.64:1 Ford 4.6L: 1.67:1 Nissan SR20: 1.58:1 |
Originally Posted by hustler
(Post 839561)
What are Honda rod ratios compares to our BP "slugger"? Is the higher rod ratio of the F20 the reason the S2k feels a bit sluggish below 5000rpm?
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Originally Posted by Bryce
(Post 839572)
According to Google...
BP: 1.56:1 S2000: 1.82:1 Chevy 350: 1.64:1 Ford 4.6L: 1.67:1 Nissan SR20: 1.58:1 |
Originally Posted by hustler
(Post 839599)
Thanks. It again appears that we have the worst engine on Earth. Is there an engine from the same era that does worse in than the BP in terms of vibration, rod ratio, head flow, fuel economy, and output?
Forgive my ignorance, but are we talking about "stroking" the BP? If so, then why not see if there is another crank that will work in this engine? In the mopar world for instance, you can drop a 440 crank into a 383 and net a 400CI engine. With a new crank and rods you can get 500+ ci from a 440 (this takes grinding inside the block though) Custom cranks are probably expensive, but if Emelio is approaching 200HP on an NA, then I assume "there is no replacement for displacement" holds true. |
Originally Posted by djp0623
(Post 839608)
Forgive my ignorance, but are we talking about "stroking" the BP?
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