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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 01-21-2006, 06:15 PM   #21
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Originally Posted by big_news_1
Does somebody happen to know the tap and plug sizes necessary to fill the outer EGR hole in the LIM?
Anybody? Bueller?
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Old 01-22-2006, 12:51 AM   #22
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Sorry man I don't know. Just measure it. It'* not that hard to get to.
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Old 01-22-2006, 04:39 AM   #23
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Actually, it'* funny you say that, because you reminded me that there'* an old LIM sitting in Doug'* garage that can be easily measured. Duh!
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Old 01-27-2006, 03:08 AM   #24
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Will simply disconnecting the EGR from the LIM cause a check engine light, or will the PCM still be happy as long as all the electronics are hooked up? I was told by a GP guy that disconnecting the EGR from the intake manifold will trip the light, no matter if the electronics are plugged in or not. What'* the story?
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Old 01-27-2006, 02:47 PM   #25
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Honestly I'm not 100% that just leaving the electronics hooked up will not trip a ses light.
If the egr valve can some how sence flow then yes it will. But seeing that it'* just a valve I don't see how that'* possible. I know that I had my charcoal canister mechanically disconnected for a while and left the electrical plugged in and it didn't set a ses.
Wether is sets an ses or not, you should stop it from sucking in un metered air.
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Old 01-27-2006, 06:51 PM   #26
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The guy I was talking to thought the EGR could sense whether there was any vacuum on it, and would thus set a CEL if it were not hooked to the LIM. I'll just try it.
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Old 01-30-2006, 05:13 PM   #27
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Well, we forgot to take pics, but it we did the job in Bill Buttermore'* driveway while getting drenched with big, fat snowflakes. It was cold and wet, but we got the new injectors, PCM, and EGR modifications installed with no problem.

We ended up using a rubber stopper for the EGR hole. If fit nice and tight, and it'* not going to dislodge any time soon. I don't think heat will be an issue, since there is no longer any hot exhaust gas in the area. I think the rubber will stand up to the temps experienced in the LIM, especially since there are coolant passages on either side of it.

I'm still running a little rich, but the AFC has been roughly adjusted for the 25# injectors. We're going to give the PCM a few days to learn a little bit, then do more adjustments. I should come pretty close when all is said and done.

The Intense Standard definitely gives the car more 'pep' than the stock PCM. The effects are made all the more noticeable because of my cam and heads. The car still won't roast tires on dry road, but it sure hits the powerband in the upper revs. It pulls harder and harder as you reach the shift point, which is pretty fun on the open road but has little use in stoplight racing, lol.

Dyno day with the Iowa Club GP pretty soon. I'll let you guys know if this whole ordeal paid off or not!
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Old 01-30-2006, 05:14 PM   #28
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Also, I'm getting a few degress of KR under load and part throttle. Never under WOT, just under light/medium acceleration. Not sure if the resonance at those RPMs is making something vibrate, but it'* a little irritating. I'll take any and all suggestions.
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Old 01-30-2006, 08:43 PM   #29
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I know your going to hate this but.. as for getting knock at partial throttle.. It may be the hotter combustion temps due to no exhaust gasses being burnt AND your higher compression ratio.
One thing you mentioned right after you buttoned everything up was that you werent sure if you had an exhaust leak from your pems? Thoroughly check them for carbon deposits from leaks. If air is getting into your exhaust before the O2, it will create a false reading and lean you out.
I know you have ported manifolds soo you may want to get a larger mandrel bent downpipe. While the bonnie'* dp is better than the gp'*, it'* not the greatest. Kind of hard to get one for a good price at an exhuast shop though..
When/if you have your pcm done, you might want to ask to back the timing down a couple degrees partial throttle and also try rasing the timing a degree or two up top since your not seeing any knock wot.
I'd really like to see a scan on this thing and I'd like to see it running 110% before you hit the dyno.
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Old 01-30-2006, 10:21 PM   #30
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What'* sad about the whole thing is, we have this engine with a built in zipper. We can pull the upper and probably the lower just like Billwren and his superchargers

Quote:
Originally Posted by Billwren
Blindfolded and a beer in each hand.
What needs to happen, if possible, is that the PCM needs to be reprogrammed for a NON-EGR engine. That would eliminate excessive cruise EGT'*. So something to the tune of making it think the EGR is closed full time? Like under WOT. I don't know if that is possible though.
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