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Title: cam/compression options for semi hemi heads Post by: axam48ida on December 17, 2009, 10:06:07 am I am looking for some suggestions, 69x88 with semi hemi cut heads
which cams? engle 110 or web cam 111 or 118. then how much compression with either caM Street use as daily driver and stop light runner carbs are dual 40 webers and maybe NOS down the road Title: Re: cam/compression options for semi hemi heads Post by: GreenTom on December 17, 2009, 10:28:58 am Hi I run typical 043 (35,5x32) with hemi cuted chambers. They were aprox 53cc per chamber (don't remember the DH correctly) but at the moment with 1mm head down I got aprox 9,08:1 on my 1776ccm engine (acording to 1,26mm DH as I remember). I run W110 and STS (1,1:1) rockers, The valves are STD (not stainless) old shiters from my old engine. I ported the intake and exhaust chanels a little bit. The car runs smooth and sound nice. today is snowing and -7C :D (-13C in the night it was) and in the mornig it started frome first go :)
The car runs constantly 15,201 with no belt and 15,7's with belt. I runn DellOrto's DRLA 40. Chemi shape chamber is a pretty oldie :) modern chamber shapes seams to be more efficient. But Hemi is a Hemi :) its nice to have it :D Title: Re: cam/compression options for semi hemi heads Post by: Jesus on December 17, 2009, 10:55:08 am I run 044 heads on my 1776cc which ended up heavily worked into a semi hemi pattern,
running msd, 44 weber's, engle 140, compression of approx 9.5:1 has given me a PB of 16.7 @ just over 80mph in my FULL WEIGHT bay window microbus. Mark and Matt from Autotechniks Built it for me and would know more about the spec. the engine was built end of 2003 beginning of 2004, I've prob done a good 50 to 60,000 miles and over 100 passes down the 1/4mile, I achieved my PB after driving the whole way from England to Norway for SCC this year. The engine is still on the original push rods tubed from the time of building it has never been apart. Title: Re: cam/compression options for semi hemi heads Post by: bugnut68 on December 17, 2009, 19:09:03 pm My 1776 with dual Kadrons is running 7.8:1... cool running, no issues, and I've got 1.25's and an Engle 100 cam. Nice lil motor, I just want more beans! The hot rodding sickness is truly infectious...;D
Title: Re: cam/compression options for semi hemi heads Post by: Jim Ratto on December 17, 2009, 19:17:46 pm SODA's street motor in late 1990's was semi-hemi chambers, 35 x 32 s/s valves, all work done @ Heads Up. We ran 8.4:1, Web Cam # 110 (similar to W120), same carbs as you, 1-5/8 merged. Car was very docile as a driver, ran 14.70's on radials with bumpers, seats, blah blah blah.
So I think Web 110 would make for a spritely engine. Title: Re: cam/compression options for semi hemi heads Post by: stealth67vw on December 18, 2009, 03:04:31 am SODA's street motor in late 1990's was semi-hemi chambers, 35 x 32 s/s valves, all work done @ Heads Up. We ran 8.4:1, Web Cam # 110 (similar to W120), same carbs as you, 1-5/8 merged. Car was very docile as a driver, ran 14.70's on radials with bumpers, seats, blah blah blah. So I think Web 110 would make for a spritely engine. |