Thank you Robertf. From the partial dyno chart, the gems system is slightly inferior to the Bosch (marginally). But,yes there is a but, those indicate 2 completely different engine management systems. None the less, this is the most “real” data posted.

 

For all you Landy folks interested still or subinterested or just want something to read, I got some progress done to the intake manifolds. Fuel rail is 100% fabricated and bolted up, purge valve set up is done as well, next is the IACV(idle air control valve). I didn’t know how I was going to have this routed or fabbed due to a completely different IACV system, but I did have some progress. I removed the gems control valve, took some measurements, I removed the nipple from the Bosch manifold(heat and slide hammer) and compared. Looks like I can press the Bosch nipple into the gems IACV slot (sounds a bit weird). I would have to fill the other side of the gems IACV tract to get it working as the gems IACV pressure differences is right at the throttle body(as opposed to before the throttle body and at the plenum (Bosch style). I had the filler set over night, maybe today or Monday I could press the Bosch nipple into place. Second to last and lastly, the throttle pot and throttle cable. I have to get the Bosch TPS bolted to the throttle plate butterfly (completely different as well). The Bosch throttle plate spindle is a half moon shows shaft, while the gems is a flat bar (circular shaft with upper and bottom shaved so it looks like a —). I kinda have an idea how this is going to get fabricated but not 100% on the thought of it. Both gems and Bosch throttle body is the same operation, just rotated 180*. This is a fairly longer post but I am asking for some thought and idea. Question 1, could I use the gems tps on the Bosch (I don’t think so as I believe the reference signal is different)?. Question 2, for the sake of safety, should I get a gems proprietary throttle cable, or maybe modify the d2 to for the gems(maybe with cable crimps I may be able to work something out)? What do you guys/gals think? Pictures will be posted today/Monday.

 

D1 cable end is very different

 

Thanks again Robertf, both ends are indeed very different. Let’s see what I can do, I only have maybe 2 shots at getting it right/functional. Depending on the amount of slack in the line, what do you think about cutting the end off right at the drum end of the cable, routing it through the eye of the throttle linkage and secure it with a wire crimp?

 

Pictures as promised, the “filler” didnt set 100% properly as I would have wanted it to but it does seal between the ports like I need it to. Pulled the nipple(lol) off the Bosch manifold, I haven’t installed on the gems yet though. I’ve just been busy on other clients rovers. Let’s see if I can get something done this week.

IACV and purge valve nipples removed

Filler material in original gems IACV tract

Waiting to press the Bosch IACV nipple into gems socket

Filler material in throttle body side

 

Bosch/Thor IACV nipple installed into upper manifold. A little thermal action got the 2 peices joint together, added some “sealer” to the joints as well. No real progress yet, although, the TPS may/may not be resolved tomorrow. Have to wait for the filler material to cure, then machine down.

 

-Bosch tps on gems throttle body; check
-IACV nipple pressed into gems manifold; check
-Purge valve nipple; check
-Injector body and fuel rail installed; check
-New bolts for upper and lower plenum;check
-Coil pack installation with bracketry; check
-Front accessory drive not interfering with coolant tube; partial check,(have to pressure test cooling system to confirm)
-Throttle cable to linkage; partial check( I have the idea, now I have to finalize)
-IACV body hose connections;partial check(I need to elongate hoses and set up near original location)
Some pictures for your eyes, did some cleaning up and paint as well. Minus well make it look good since I’m taking the little time I have after work for it. For obvious reasons, the upper section of the engine is not gasketed or bolted up, I am having an epiphany of fabbing up a rear coolant cross over pipe/tube.

 

Performance implications aside, that is a more handsome package.

 

The GEMS intake was a thing of beauty! Then the Germans got involved ruined it with a very ugly intake IMHO vs the GEMS unit.