onephatz Posted May 31, 2005 Share Posted May 31, 2005 I've just got my car running again with the stock turbo, an intercooler, and dsm 450's. I was doing some data logging on megatune and was wondering what someone else's intake temps were after a 1/4+ mile pull. mine stated out around 85 and ended up around 115 or so. also, i'm having trouble getting a clear tach signal (jumps from 2000->13000 rpm) to my zetroinx wideband controller and my car tach has just decided to start freakin out on my not reading anything or just jumping around. is there a fix for this? I'm running a msd boost timing master for ignition. it has no tach output so I just hooked up off the neg. terminal of the coil. 75 280z any thoughts? jesse Quote Link to comment Share on other sites More sharing options...
HB280ZT Posted May 31, 2005 Share Posted May 31, 2005 Jesse, I am not sure if you have the MSD 6BTM or not if so then you have a tach trigger on this unit. I have one myself and mine does have a tach trigger output. Here is a link to what I have : http://www.msdignition.com/pdf/6462_add_frm23654.pdf I hope this helps. HB280ZT Quote Link to comment Share on other sites More sharing options...
onephatz Posted May 31, 2005 Author Share Posted May 31, 2005 Jesse' date=' I am not sure if you have the MSD 6BTM or not if so then you have a tach trigger on this unit. I have one myself and mine does have a tach trigger output. Here is a link to what I have : http://www.msdignition.com/pdf/6462_add_frm23654.pdf I hope this helps. HB280ZT[/quote'] yea mine is just the btm not the 6. they wanted like $350 for a 6btm and I really want to spend that much. it has the boost timing master but no multi spark discharge. mine is like a 8764 or something like that. jesse Quote Link to comment Share on other sites More sharing options...
HB280ZT Posted May 31, 2005 Share Posted May 31, 2005 Jesse, You may need to look into an MSD Tach adapter 8910, here is a link that explains more about it. http://www.msdignition.com/pdf/8910_tach_adapter.pdf I had to put one on my setup to make the tach read correctly. I hope this helps. Also any info on how you set up your MS? MSnS? would be great I am thinking about putting one in my 77 280Z turbo. If you have pictures that would be great also. Thanks HB280ZT Quote Link to comment Share on other sites More sharing options...
evildky Posted June 1, 2005 Share Posted June 1, 2005 I havn't got an intercooler yet and at 13psi my intake temp tops off around 230.man I need an I/C Quote Link to comment Share on other sites More sharing options...
mobythevan Posted June 1, 2005 Share Posted June 1, 2005 This wasn't 1/4 mile but I was doing 3rd and 4th gear pulls then let off, so similar. This was with the old saab IC. I haven't measured again since the NPR went on. 1st measurement: No intercooler, just j-pipe Ambient air = 55 Boost = 10psi (in manifold) air temp under no boost (cruising) = 100-110 air temp under boost = 170-190 2nd measurement: saab 9000 IC installed Ambient air = 62 (got a little warmer before I could get back out) Boost = 10psi (in manifold) air temp under no boost (cruising) = 70-78 air temp under boost = 80-90 Quote Link to comment Share on other sites More sharing options...
onephatz Posted June 1, 2005 Author Share Posted June 1, 2005 Jesse' date='Also any info on how you set up your MS? MSnS? would be great I am thinking about putting one in my 77 280Z turbo. If you have pictures that would be great also. Thanks HB280ZT[/quote'] I am in the process of putting up a web page with all the details and pictures. I'll give ya a little rundown of what I have and did. 75 280z stock zxt motor (arp rod bolts) p90 head n-42 intake 280zxt throttle body msd 8762 (boost timing master) stock 280z distributor megasquirt efi v. 2.2 1g dsm 450cc fuel injectors stock fuel rail two stock fuel pumps poor man's front mount intercooler 1g dsm blow off valve home made boost controller moved the battery to the rear hatch. nissan clt temp sensor 16" puller electric fan It acctually went more smoothly than I had anticipated. I used a stock distributor to fire the msd which fires the coil. the tach and megasquirt are hooked up off the neg. post of a 12v zxt coil. at the moment the boost is retarded 2 degress for every pound of boost starting from zero lbs. for me the stock distributor mechanical advance gives about 15 degress of advacement around 1400 rpm. I run about 15-20 degress of static advancement. I was supposed to reflash the ecu with the new values for the coolant temp sensor but am lazy and didn't want to pull the computer out to make the nessasary mods to do so. since it uses that info for warm up enrichment I didn't really car what it said. it's close enoungh to the gm sensor that I didn't need to reflash the ecu to make it work. I used dsm 450's with modified plastic injector holder thingy's(that's the technical term). they had to be a little shorter to squeeze the injector into the lower o-ring. I then used on3go's idea of just pushing a hose over injector inlet(minus o-ring) and using the stock fuel rail. actually worked quite well. had to use 3/8" fuel line though. it will clamp down on the rail. I also used the resistor pack from a zxt (a z will work also) since the injectors are 2.5 ohms each. the intercooler is made from taking two dsm side mount intercoolers cutting off the end tanks and welding them together. not the most efficent but i'm not running 200 degrees either. oh and the greatest thing thus far the I found out about my car, it weights 2480 lbs(1240 front 1240 rear). course that's with no a/c and a gutted interior, but.... . all in all I'd say I am very pleased with how well it is working. I have to give mad props to Moby for posting his fuel and timing maps. almost perfect. I think if I were to do it again i'd proubly do a ms&s. can't wait for ultra megasquirt. this site has also been a tremendous help in getting good technical data. if anyone wants my fuel map or needs some help on setup send me a pm or just e-mail me at onephatz@hotmail.com good luck jesse Quote Link to comment Share on other sites More sharing options...
Guest Loose_Screws Posted June 1, 2005 Share Posted June 1, 2005 I made a couple of logs as well at the 1/4 track. With 80F ambient, by the end of the 1/4 I saw 120F temps, running 13psi of boost. I also have a 18"x8"x3" w/ 2.5" inlet Spearco. I have also noticed that under boost, the air must be extremely turbulent around the sensor as my temp gauge swings quickly and widely. Anyone else do this? At idle, it reads fine. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted June 2, 2005 Share Posted June 2, 2005 In the logs my air temps rise slow and steady. My sensor is still located right in front of the TB. Quote Link to comment Share on other sites More sharing options...
onephatz Posted June 2, 2005 Author Share Posted June 2, 2005 In the logs my air temps rise slow and steady. My sensor is still located right in front of the TB. same with me, has a slow and steady rise when I'm heavy on the throttle. no wild fluctations Quote Link to comment Share on other sites More sharing options...
Guest Loose_Screws Posted June 2, 2005 Share Posted June 2, 2005 The fluctuations I am seeing could be due to some refresh rate. When I look at the logs, the temps recorded are fairly steady. Quote Link to comment Share on other sites More sharing options...
dj paul Posted June 24, 2005 Share Posted June 24, 2005 I've just got my car running again with the stock turbo' date=' an intercooler, and dsm 450's. I was doing some data logging on megatune and was wondering what someone else's intake temps were after a 1/4+ mile pull. mine stated out around 85 and ended up around 115 or so. also, i'm having trouble getting a clear tach signal (jumps from 2000->13000 rpm) to my zetroinx wideband controller and my car tach has just decided to start freakin out on my not reading anything or just jumping around. is there a fix for this? I'm running a msd boost timing master for ignition. it has no tach output so I just hooked up off the neg. terminal of the coil. 75 280z any thoughts? jesse[/quote'] about the tach jumping it sounds like you need an inline resister. i cant remember what value. look on zcar.com for a thread. or go on google and look for it. it should not be hard to find. lots of people have had that problem especially on the early zs.or you could also get an autometer gauge and be done with it =) Quote Link to comment Share on other sites More sharing options...
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