j_eremy Posted March 28, 2007 Share Posted March 28, 2007 Ok to recap I have purchased a 355 with a supposed 9-1 comp. offy 360 manifold and schnieder stage 2 cam. I am buying the tri power manifold from edelrock, where would I get my rodchester carbs, and linkage. their is no information on where to obtain them from on the website. also, the previous owner said the comp was a 9-1 but when I did a comp check on it today, I pulled 232-234 out of it. also edelbrock only offers a torquer cam, and performer plus cam, what high performance cam would work well with this engine. I want it to sound lumpy, like a 3/4 race cam. kind of a upper rpm cam, but nothing that comes on above 2500. thanks for the help. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 28, 2007 Share Posted March 28, 2007 your FIRST need is to find out WHAT your actually running as to ENGINE parts, compression etc. MOST cams that sound excessively LOPEY at idle are designed to operate in the 3500-7500 rpm range and will be complete TOTAL DOGS in a 9:1 cpr engine COMP CAMS sells THUMPER cams that will give the lopey idle in your application but they are NOT designed for making POWER, just a LOPEY IDLE for CRUISE/SHOW CARS http://www.compcams.com/information/whatsnew/NewsDetails.asp?ListHistoryID=1172529887 230 psi IS not the reading youll get from a 9:1 cpr engine http://victorylibrary.com/mopar/cam-tech.htm you may want to go DUAL QUADS vs TRIPS as GOOD rodchester carbs are BOTH expensive and RESTRICTIVE http://store.summitracing.com/partdetail.asp?part=EDL%2D20254&autoview=sku Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted March 29, 2007 Share Posted March 29, 2007 230 psi IS not the reading youll get from a 9:1 cpr engine http://victorylibrary.com/mopar/cam-tech.htm I'm sorry grumpy but that post was just too long . I scrolled down to look for a java type calculator as to what it should be and no dice. Would you mind explaining roughly where it should be? Quote Link to comment Share on other sites More sharing options...
Ledphoot Posted March 29, 2007 Share Posted March 29, 2007 Grumpy is right. Tri power = big bucks to make it work right these days. I had a set on a Pontiac that I had to do alot of work to get right and had alot of money in them 20 yrs ago when parts were still plentiful.... If your going for looks you'll need to go dual quad. Just know the power will suffer BADLY under 3500 rpm and torque will be practically non existent. Even with dual 390 Holleys you'll have to match carefully to get it to do anything less than embarass you off the line... Build a street motor for torque.. 2500-6000 rpm. Run a dual plane high rise manifold and hide the single carb under a trick breather setup and dress it all up for WOW factor. Then when its time to put up or shut up your not accused of being a NO GO SHOWBOAT!... Just my opinion... Stick the tri power on Ebay for the Rat Rod boys. They will stick 2 junk carbs on each end blocked off and a good 2bbl in the middle... just for looks... and you can too if you really want the look.... Make sure that middle carb is an old high CFM 2 bbl like the 455 Buicks or Pontiacs... I think you can get 450cfm out of some of them... but thats still shy for a small block chebbie.... Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 29, 2007 Share Posted March 29, 2007 I'm sorry grumpy but that post was just too long . I scrolled down to look for a java type calculator as to what it should be and no dice. Would you mind explaining roughly where it should be? YOU really need to read thru the whole post to understand the concepts, a 9:1 cpr engine in good condition,would normally produce compression test readings in the 140-150 psi range, 230 psi puts you about in the 12:1 plus cpr range heres more info (yeah it might be borring but without knowing what your doing your results will always be less than optimal http://www.chevytalk.org/fusionbb/showtopic.php?tid/92966/ Quote Link to comment Share on other sites More sharing options...
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