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JoeMag's Avatar
 
Join Date: Jul 2005
Location: Cleveland, OH
Posts: 987
adaomakin -- not to answer for Don, but I think he was saying he got the DELTA between heads down to 75F from 275.
Old 11-18-2005, 08:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
Me like track days
 
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Join Date: Sep 2003
Location: Kirkland, WA
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I like it when a GT3 is reeled in easily, and a GT2 can be caught and passed.
That is pure track driving satisfaction...
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 11-18-2005, 09:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
Wo ist die Rennstrecke?
 
DonE's Avatar
 
Join Date: Mar 2004
Location: Brooks, GA
Posts: 1,211
Quote:
Originally posted by JoeMag
Thanks Don. ...I am actually looking into the electromotive XDI. What did you end up setting your timing at in your crankfire setup?

What type of mods did you do to get A/F? Did you do the IA fuel head mod, play with WUR, etc...

btw -- where did A/F go above 6k?
The timing is really hard to compare considering the mods I did. But to answer your question, here is my timing from idle to full boost and red line (linear):

54 kpa 1000 rpm - 11
65 kpa 1300 rpm - 11
76 kpa 1756 rpm - 16
88 kpa 2193 rpm - 32
99 kpa 2630 rpm - 30
110 kpa 3067 rpm - 30
121 kpa 3504 rpm - 28
132 kpa 3941 rpm - 28
143 kpa 4378 rpm - 27
154 kpa 4815 rpm - 24
165 kpa 5252 rpm - 24
176 kpa 5689 rpm - 22
187 kpa 6126 rpm - 18
208 kpa 6563 rpm - 16

I think the timing is actually the weak link in a well tuned CIS motor. I had the fuel head mod (17% more fuel, shaved the fuel pin stop, tuned my WUR (early model) to provide enough cold pressure to start, warm pressure to start and cruise at 14.0:1, and enrichment to provide 12.0:1 at 4 lbs of boost. At idle I had 0% CO. I had 12.0:1 all the way to red line.

With the proper timing, you could bring the turbo to life a bit quicker and back it off on top.
Old 11-18-2005, 02:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
Wo ist die Rennstrecke?
 
DonE's Avatar
 
Join Date: Mar 2004
Location: Brooks, GA
Posts: 1,211
Quote:
Originally posted by JoeMag
adaomakin -- not to answer for Don, but I think he was saying he got the DELTA between heads down to 75F from 275.
Correct.
Old 11-18-2005, 02:44 PM
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Location: Essex UK
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Garage
thanks!
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1980 SC soon to be big hp 3.3t powered 73RSR Replica (well, I'm keeping the engine but everything else is going )
Old 11-18-2005, 02:51 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #25 (permalink)
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