What would cause This - help please?
Teching In
Joined: Apr 2004
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From: All over(Arlington)
Originally Posted by Navy David SS
Goober35 .. yep same dyno - almost same weather - 40's and light spratic rain..
David
David
Joined: Nov 2001
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From: Texas and Qatar
Was this still with the 28" ET Drags? I remember you posted you run like you race, and we always forget to check tire pressure ourselves before dynoing. I would start off looking at simple stuff like MAF and O2 sensors, before blaming anything else. From there maybe do a complete compression test and leakdown test, remember when you do a leakdown the pistons have to be at TDC and both valves closed or your results will be off. Its very strange that you did dyno well at first and now your off quite a bit.
Thread Starter
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Joined: Nov 2001
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From: Sioux Falls, SD
Joseph. Yep 28'ers were used. I did not check the tire pressure. The SS was "borrow" the shop for a couple days to show off to some ricer's.
MAF has got most people's vote. I have put the stock MAF back on. Also a new SLP 85MM is due in on Tuesday.
O2's are almost new, but will check them out - A-tap numbers 'seemed' to be ok.
Doubt that it is the heads. The last pull on the 1st dyno was on nitrous and everything went very well (512/563). No hesitation, no smoke, no engine noise.
Well I guess we'll see. I'll head back to the dyno 1 last time before our track finally opens on the 24th of April. I will have them do a leak-down and compression test first.
Thanks
David
MAF has got most people's vote. I have put the stock MAF back on. Also a new SLP 85MM is due in on Tuesday.
O2's are almost new, but will check them out - A-tap numbers 'seemed' to be ok.
Doubt that it is the heads. The last pull on the 1st dyno was on nitrous and everything went very well (512/563). No hesitation, no smoke, no engine noise.
Well I guess we'll see. I'll head back to the dyno 1 last time before our track finally opens on the 24th of April. I will have them do a leak-down and compression test first.
Thanks
David
