I am located about 80 miles from St. Louis, Missouri. Dale, I have been on your website and have played with the calculator. I think a 3.42 put me at 2200 RPM's at 70 MPH. I have P255-60-15 tires. Is this too low of RPM's with the overdrive? I do not intend to do any drag racing just want it to be a nice cruiser. Our kids live in St. Louis so I would love to cruise up the interstate to visit them in the Chevelle. (Guess I kinda gave my age away) I don't think it could get much better than that!
Thanks for all your help so far and hope to hear more good advice, Russ From: a396...@fidnet.com To: chevelle-list@chevelles.net Date: Thu, 18 Mar 2010 08:52:36 -0500 Subject: Re: [Chevelle-list] I need advice Depends on where you are as to what shop I'd recommend for a 700R4 - or any transmission. I've heard good things about Phoenix Transmission in Weatherford, TX. and had them install one in my old 67 SS396. Their high horsepower unit (up to 450hp is just under $1800 - http://www.phoenixtrans.com/html/gmtrans.html. Naturally if you're nowhere close by Texas, I'm sure there are other shops just as capable. There are a lot of aftermarket disc brake companies as well and most are pretty good. Building a high horsepower engine, you shouldn't skimp on brakes. Expect a good disc brake setup to run anywhere from $700 to $1500 depending on company. Don't settle for some $395 eBay special. Baer is on the higher end but have excellent products. MP Brakes (mpbrakes.com), Classic Performance (classicperform.com), Inline Tube (inlinetube.com), and I'm sure there are more offer basic kits from around $700 up or a bit more if you want power disc. Your tire size will have some effect on the rear end gear you might want to choose. A page at my site, http://chevellestuff.com/tools/rpm_calculator.htm, will let you play around with tire sizes and rear end ratios based on your transmission selection. Transmission gear ratios are shown for the most popular GM transmissions; just plug in your rear tire size (such as 235x60x15), a rear axle ratio (like 3.55), a highway speed (like 75mph) and it'll calculate your RPM. Be aware there will some slippage with an automatic so numbers won't be exact but they'll be relative regardless of ratio, tire size, etc. selected. Taking my car for example, TH350, 3.36 rear end, 235x60x15 tires and at 75mph it calculates to 3245 rpm where my tach shows about 3500. Changing to a 700R4 (and nothing else) with the overdrive ratio the rpms drop calculates to 2270 at 75mph. I could run as low as a 4.56 gear and still only be turning 3100 at 75mph with the o/d. Dale Admin - ChevelleStuff.com/forums From: chevelle-list-boun...@chevelles.net [mailto:chevelle-list-boun...@chevelles.net] On Behalf Of Russ Miesner Sent: Wednesday, March 17, 2010 10:08 PM To: chevelle-list@chevelles.net Subject: [Chevelle-list] I need advice Hello everyone, I am a reading person on the list and not so much of a contributer but I would like your opinions. I have a 65 Chevelle and it currently has a 350 with a powerglide. Everything is getting tired. I want to overhaul and stroke the engine by a local engine builder. Plans are to do the rebuild this summer because he builds alot of racing engines and winter is his busy time. He said it will have between 425 to 450 horsepower. I want to put in a 700R4 transmission for better highway cruising. I have looked at many different transmission companies. Has anyone ever used Monster transmission? They seem to have decent prices and kits to complete the conversion. I would also like to upgrade to front disc brakes. Brakes really confuse me. I see a really big range of prices. I do not need the high end brakes just better than drums can offer. I am also thinking about a March serpentine belt system. Of course, next comes the rear end rebuild with a posi-unit. Any suggestions on gear ratio? Any and all advice would be greatly appreciated, Russ Hotmail is redefining busy with tools for the New Busy. Get more from your inbox. Sign up now. _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. http://clk.atdmt.com/GBL/go/210850553/direct/01/
