IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: trashmechlv on August 15 2015, 12:56:09 PM
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Went to the track last night here in Las Vegas. Air temp was 90' at midnight and DA was about 4450. Ran 3 passes. Best of 11.46 @115mph. was fighting with my PTC 10" converter and ended up going with 9.5. My slip at traps went from 15% to 5% at only 5000rpm. Dusty nailed the converter. Car should pick up more time with some good cooler air and if I can straighten out my boost creep. I havent posted for a while but appreciate the help on here from several people over the last few years Ive had my GN. :cheers:
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Nice work :)
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Great run in the desert heat! What boost and timing are you running? Also what snail do you have? :cheers:
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Thanks! Its a TA52 (59mm). Boost starts around 24 and creeps to 27-28 by top of 3rd. Timing was 27/22. Stock unopened longblock on E85.
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That is even more impressive with an unopen motor! :rock:
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If anybody looks at my PL log, I just noticed on the MAF graph it looks like it cut out twice for a split second. Its also happened once on my other log. Does that mean my stock MAF is taking a dump?
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You are running really well now. You have done a great job!
Sent from my LG-H810 using Tapatalk
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I'm a dummy...didn't see the 2nd WOT blast. Yeah...the MAF went low. Good RPM drop at the shift points. Slight KR in high gear...1.8.... you were getting fairly lean...tho it went away...it may have heard something. You could pull a little low gear fuel. Once again...nice run. :)
19 PSI launch at 4300...hell yeah! :rock:
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Thanks.! I started logging before my burnout so I dont forget :) I posted a screenshot on the fb tb.com page about the MAF and Dusty responded the MAF is ok, just resetting because Im flowing more air than it could read. It should pick up some more time with a few tweaks and better air. I would also like to fix the boost creep so I can run 27-28 across the board from the start. Its nice when they are running well!
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That's a damn good run in that heat and DA! Congrats!
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Any of you guys compare the AF and 02's at the top of high gear on Mikes run? Steve...stop grinning. :)
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Since I went with the wideband tracking chip I havent paid much attention to the O2s. I just watch the BLM and see if the chip is either adding fuel or taking it away and watch for knock. Now that you mentioned it Im going to have to look at my logs again lol.
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Mike...what volt booster are you using?
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Volt booster is from Caspers 102027
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Scoobum. I looked at my log again. I see the O2s get to about .740 or so at the traps, but I looked at WB and it was actually a little fat for my 11.30 target and the BLM isnt really throwing fuel at it. I will try to lean out low gear a little and see if it will pick up in the 1/8th next time. I need some 1/8 times like yours!! I think the car has a low 11 in it with some better air and tune. Vegas elev is 2100 and our DA is almost always shitty like 4500+. Not sure exactly how much DA has an effect on turbo cars though. I also would like to get my boost a steady 27-28 through the entire run instead of starting at 25 and creeping up to 28.
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It has plenty....
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As Steve says...it has plenty to do with it. Our southern Ontario summers are hot and humid. The jetstream goes into an omega pattern and draws air from the Gulf of Mexico. Pretty much like the Caribbean up here during the summer months. :rock: The car is a pig in this heat...so I leave it at 20 pounds and Erics chip on the default settings. Whatever it does it does when I bracket race it. Now when the cool 'clean' air arrives in October...is when I turn the wick up. Temps are about 55 degrees with about 50ish humidity...per fect for making silly HP. :rock:
The heads on my car have been worked on...and I run a CEA 6262 and use race gas. If I told you how much low gear timing I throw at it you'd shit. :)
I've got the Caspers V Plus volt booster...prol ly the same one you have.
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You can tell me how much timing.. I wont tell anyone!
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It is definitely moving. Good work!
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You can tell me how much timing.. I wont tell anyone!
Nothing for me to go 6 degrees over Erics low gear timing default in clean air with the low gear 02's in the 760 range. I'll pull the high gear 02's around 750 and leave the high gear timing on default. From the reading I've done on the other board the heavy hitters are using lots of boost...north of 30...and mild high gear timing. I tested last fall with more high gear timing. The car didn't pick up any MPH and the ET stayed the same. I haven't seen a hint of KR with race gas. I'm gonna try to get to 28 to 30 PSI in the fall. Just read a post by Bison...and he's telling one guy that the wastegate hole should be 1 inch for the 60 series turbo he has to hit 28 to 30...as he can't get past 25. Figures the wastegate hole may be too big to drive the pressure up. I'll have to take a measurement on mine...not sure how far I ported it. It's gonna be close...