Raixhu Posted May 31, 2015 Share Posted May 31, 2015 Update Quote Link to comment Share on other sites More sharing options...
azcarbum Posted May 31, 2015 Share Posted May 31, 2015 I stumble for words... incredible! Quote Link to comment Share on other sites More sharing options...
Derek Posted May 31, 2015 Author Share Posted May 31, 2015 Not much to report. Waiting on the cam core castings. I got in a hurry when I was reaming the intake valve guide bores so the stock sized guides are too small. Fortunately SI Valves sells universal pre bored valve guides. They are manganese bronze. I have to machine the exterior to the correct size. After that the head is ready to go to Mazworks for the head work. I'm hoping to have it ready to go next week. When I have the head back I can determine if the cam bores are still aligned. At that point if they are good the cams will ground. The intake manifold printed cores are done and on their way to the foundry. I'm about a third of the way done with the manifold pattern. Should have it done next week as well. I was sick for a week so that kind of screwed up production. Quote Link to comment Share on other sites More sharing options...
azcarbum Posted June 1, 2015 Share Posted June 1, 2015 Pardon if I missed it, but is your initial build using what lower end to get these HP estimates? What crank and rods?... I saw it was 89mm pistons. Quote Link to comment Share on other sites More sharing options...
Tony D Posted June 1, 2015 Share Posted June 1, 2015 What's a Honda K20 make stock? Add 50%... That would be a benchmark I guess... Quote Link to comment Share on other sites More sharing options...
rooger82 Posted June 1, 2015 Share Posted June 1, 2015 That's a pretty big range of HP. The US K20 motors range from 148-210hp Hopefully this is on the higher end and somewhere near 300hp. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 1, 2015 Share Posted June 1, 2015 If the motor doesn't produce 400 HP +, then there is something wrong. I have 300 RWHP out of my stock headed 3.1 liter....... Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 1, 2015 Share Posted June 1, 2015 Header design should support 400+... Any headway on the header bits? I am fixing to cut another set of header flanges for a 3.4l GM V6 but it won't bump this down the list. Quote Link to comment Share on other sites More sharing options...
Derek Posted June 1, 2015 Author Share Posted June 1, 2015 Header design should support 400+... Any headway on the header bits? I am fixing to cut another set of header flanges for a 3.4l GM V6 but it won't bump this down the list. Finishing up a pattern today and I'll be able to work on the stubs tomorrow. Should be able to ship the flange, adapter and stubs tomorrow. Quote Link to comment Share on other sites More sharing options...
texis30O Posted June 1, 2015 Share Posted June 1, 2015 This thread update so saves my Monday..... Quote Link to comment Share on other sites More sharing options...
Derek Posted June 2, 2015 Author Share Posted June 2, 2015 (edited) They call him "Stubby" Very happy with the fit. Made a mandrel to form the ovals. Should make for a nice looking header. Remember kids good fabrication is all about joinery. The better the fit the smaller the weld. The smaller the weld the less the warp. The flange and header will be mill finish. Going out today to Xnke for fabrication. Edited July 7, 2017 by Derek Quote Link to comment Share on other sites More sharing options...
azcarbum Posted June 2, 2015 Share Posted June 2, 2015 looks perfect. Quote Link to comment Share on other sites More sharing options...
garvice Posted June 2, 2015 Share Posted June 2, 2015 Exhaust done! No need for any me pipe work. Well ok, maybe a little to get the gas out the side of the engine bay. Quote Link to comment Share on other sites More sharing options...
madkaw Posted June 2, 2015 Share Posted June 2, 2015 Loving this Hybridz team project. Not enough skills to contribute though-lol Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 2, 2015 Share Posted June 2, 2015 Ah, well we can just turn 'em straight up out the hood....Zoomies! Quote Link to comment Share on other sites More sharing options...
rooger82 Posted June 3, 2015 Share Posted June 3, 2015 Oh yes, Zoomies please!!!!! Quote Link to comment Share on other sites More sharing options...
budgy Posted June 4, 2015 Share Posted June 4, 2015 I too would think 300 horsepower would be on the low side of things. K24 engines with K20 heads (and obviously high compression and bigger cams) are making over 300 WHP. Not sure how the K20 bottom end compares to an L-series... Quote Link to comment Share on other sites More sharing options...
seattlejester Posted June 4, 2015 Share Posted June 4, 2015 K20 motors can make a bit of hp, but struggle in the torque realm, the k20 base model and the k20 type-s/r models actually make a similar amount of torque despite the varied valve train/v-tec engagement point/compression ratio/etc. Would be very cool to see if the L - K combo yields the nice torque of the L-6 and the higher hp generating numbers the heads are known for. Keep up the fantastic work sir. Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 7, 2015 Share Posted June 7, 2015 Header materials showed up friday, they're in the shop waiting on me to get back from work this week. Will start stripping my Z's manifolds off thursday to allow for the test fitting the header for the KN20 head. Going to try to fit the headers such that the engine can be leaned either direction and they still clear the floor. May wind up with a removable collector, would be a better way to go in any case. Will allow for a header that can be tuned from 6000 to 9000RPM, which is the only place that I believe we'll see gains over a well-prepped 2-valve head. Quote Link to comment Share on other sites More sharing options...
Tony D Posted June 8, 2015 Share Posted June 8, 2015 I think it will help as low as 3,500 on up, and really shine after torque peak... Quote Link to comment Share on other sites More sharing options...
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