Well I'd like to avoid using a tach adapter if I can. I want to keep things as simple as possible. I've found a guy localy that programs PCMs so what signal would I have to have it changed to for a 95 guage cluster tach?
Well I'd like to avoid using a tach adapter if I can. I want to keep things as simple as possible. I've found a guy localy that programs PCMs so what signal would I have to have it changed to for a 95 guage cluster tach?
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.
Originally Posted by low91
Ok so I checked it out today and damn do I ever feel stupid.The linkage couldn't move all the way forward because it was hitting the header flange. I don't know how I could have missed that, but it shouldn't be a hard fix I just gotta pull the header find a new flange to weld on and cut the collector down a bit.
So does anyone know how to make the tachometer work on one of these swaps or what?
Where did you get those flanges for the headers????
89' GMC RCSB 6.0L LQ4, T56, 4.56 Gears
I got them from a local peformance/exhaust shop. Its a pretty standard item any good exhaust shop should have a few laying around. A 3" flange slips over the collector and welds in place then the pipe side is just flared to match up. If you ask me these headers should come with flanges, there the first set of headers I've had that didn't. If you can't get them localy i think summitracing has the flared side w/flanges
Summit SUM-G4754 - Summit® Exhaust Reducer Kits - summitracing.com
Thes should work nice to clear the trans crossmember
Hedman Hedders 18804 - Hedman Universal Header X-Tensions - summitracing.com
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.
After you fix your header interference problem...You should somehow get a heat barrier between the exhaust & the transmission/linkage, etc. Its way too close in my opinion.
Yeah It is pretty close. I've been driving it for about a week now so I should probably check the boot out to make sure its not melted. I'm going to pull the exhaist and paint it in the next few weeks whenever I get the new exhaust welded up, I was planing on wraping a few feet back with header wrap.
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.
Found this when I was cruising the net. May be your answer for a cheap easy fix on your tach...
72 C10 5.3 4L60E
72 C10 5.3 4L60E
Good info. I was thinking about switching to all aftermarket gauges anyway so this would be an easy fix. It states that the pcms tac signal wasn't strong enough, but I though the problem was that the pcm put out a different signal?
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.
Sorry to dig this back up, but did you ever get your tach working? I know how to fix it if you didn't.
LMK.
Thanks,
Cody B.
-Slow Is Not An Option-
93 Stepside - Forged 347 - LS6 intake - Stage II LS6 Heads - MTI X1 Cam - Vigilante 2800 Stall - HP Tuners - Schoenfeld Headers - 4.11's w/Powertrax - Caltrac's - 430/400
02 Trans Am - Forged 408 - Single Plane GMPP - 96lb/hr Injectors - HPT 3 Bar - Twin 67mm Turbonetics - Huge FMIC - Moser 9" - 4L80E - Alky Control Meth - Jesel J2K - Eboost2 - waiting dyno
Posting Permissions
Reply With Quote
