DIY_EFI Digest Saturday, June 26 1999 Volume 04 : Number 379 In this issue: GM coilpacks for V6? HELP! Re: GM Map sensor info. Re: Todd's sure fire blower sale - Fred, See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 25 Jun 1999 12:06:26 -0700 From: Jason_Leone@xxx.com Subject: GM coilpacks for V6? HELP! I need to know what GM make, model, and years come with the GM coilpacks on a V6. Should have three coils, one per two cylinders. I'm planning on splitting up my Electromotive TEC II due to heat soak problems (used on a VW VR6 engine). I'm moving the ECU into the car, but leaving the coilpacks mounted to the cylinder head. The older TEC I unit was this way (seperate coils and ECU)...but not the newer TEC II. I already talked to the guys at Electromotive about having a TEC II in the older TEC I housings, but it's way to pricey and tey really don't want to do it. So, I'm investigating if a GM coilpack mounting base will work just fine....get the idea? Otherwise, I have to fabricate a custom mounting plate and route the three pairs of male spades/wires through the plate and into the three coils. Can anybody help me here? Maybe a wrecker will sell me the GM V6 coilpacks with mounting base... Jason '93 SLC (money pit!) ------------------------------ Date: Fri, 25 Jun 1999 21:09:04 -0500 (CDT) From: Robert Wilkinson Subject: Re: GM Map sensor info. >I'm building a waste gate controller using a GM Map sensor. I found what >I >beleive is a 2 bar map sensor but the sensor was damaged, so I want to >buy a >new one from GM. I can't read the part number and the parts guy wants >either a part number or the year and car that the sensor is from. The syty.org website has a few GM MAP sensor part numbers for boosted applications. Or you could go to an Autozone (or any Wells parts supplier) and ask for Part number SU129 which is a 2 bar for an '87 turbo regal. It will cost you the sum of $28.99 + tax. Rob ------------------------------ Date: Sat, 26 Jun 1999 03:42:09 EDT From: EFISYSTEMS@xxx.com Subject: Re: Todd's sure fire blower sale - Fred, Hi Mike, Output temps vary from supercharger types (ie. roots, screw, or centrifugal),,,,but in regards to the roots,,most "street" blowers are not teflon stripped as they will make alot of heat just from the friction of the teflon and the fact at part throttle there is very little fuel or air moving through the charger.....a good example of this is the $2000 Weiand 6-71's which are a glorified Detroit rebuild(a little tighter clearance).....but they still look pretty cool sticking out of the hood of a street car on saturday night..........but you'll never see a good blown gas anything with nozzles in the ports as the blower will create too much intake air temp and lose efficiency, or in effect, pumping losses..........the more boost the higher the heat,,,,,the higher the helix in the rotors the more efficient the charge as it is not "batting" the air as much as it is moving it,,,,but again higher helix causes transient problems as it is effectivly rolling the air forward and a screw is harder yet as it internally compresses before release with built in pressure ratios decided by the size and shape of the "pie" output.........but once it is in a boost above 5 lbs I have seen mixtures between cylinders to even out......and above 30 lbs to be almost even............even with the fuel entirely dumped above the rotors.........as for an example of temps.......572 BBC with an 8-71 making 12 lbs of boost and 1050hp having and Intake air temp of 315F and a screw type making the same hp on the same engine at 9 lbs of boost with only a 170F air temp.......which one do you think is going to require less octane??????.....anyway hope that helps.. - -Carl Summers In a message dated 6/20/99 7:07:12 AM Pacific Daylight Time, ECMnut@xxx.COM writes: << Subj: Re: Todd's sure fire blower sale - Fred, Date: 6/20/99 7:07:12 AM Pacific Daylight Time From: ECMnut@xxx.COM Sender: owner-diy_efi@xxx.edu Reply-to: diy_efi@xxx.edu To: diy_efi@xxx.edu Hi Todd, Leaving out the issue of "HP req to run the blower", If you pump 15 lbs of boost (at 400+ deg F) into a 440, she she prolly won't live long at all, on pump gas. Check with BDS or other old timers for some helpful temp/flow boost curve data. The old GMC design makes lots of heat. I've been digging for some old docs on the above for a "prepped" 671, and can't find it anywhere. BETTER YET, Carl Summers, (AKA the Whipplecharger man) are you out there? He is likely to have data from output temps for different blowers. Mike V > Hpwdy Bill, > > Just wanted to mention that if you pumped 15 lbs. of boost into say, a > 440, you will DEFINITELY be pushin WAY more than 100 hp, more like 400+ > additional....depending on the type of fuel being used.... > > Later.... > ----------------------- Headers -------------------------------- Return-Path: Received: from rly-yc05.mx.aol.com (rly-yc05.mail.aol.com [172.18.149.37]) by air-yc04.mail.aol.com (v59.51) with SMTP; Sun, 20 Jun 1999 10:07:12 -0400 Received: from esl.eng.ohio-state.edu (esl.eng.ohio-state.edu [128.146.90.233]) by rly-yc05.mx.aol.com (vx) with SMTP; Sun, 20 Jun 1999 10:06:56 -0400 Received: (from root@localhost) by esl.eng.ohio-state.edu (8.8.7/8.8.7) id JAA30298 for diy_efi-outgoing; Sun, 20 Jun 1999 09:35:28 -0400 Receiv >> ------------------------------ End of DIY_EFI Digest V4 #379 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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