All The attached photos show runs from two different days and tracks. Does my et's align with my 60' and 330'? I feel like the car accelerates quick to the 1-2 shift point but is a bit slower from 2-3. I recently changed to an spx intake and will see if that helps next time out. Thanks Mike
Its the opposite,...your 60 is high for high 90mph car,...your making enough power for 6.80s with a 1.45 60ft,...your either spinning or the converter is way to tight
there is 4mph difference between the two outings,...thats ALOT what was weather? Tune up changes? The 1.55 60ft and 92~93 mph is about rite
I find this calculator to be fairly close....your et is slow for your best 60ft time http://www.wallaceracing.com/etcalc.php
I was told I should be around 6.80s but the cars not there. Is there a way to verify the converters too tight?
6.80s would be about 1.50 60ft, when my car does 1.45 it goes low 6.60s maybe crack into 6.50 at high102/low103.......if we have lesser condition it will do 1.47/8 and run low 6.70s at upper101/low102......real shitty air and track will fall to 1.50s with the 6.80 at barely 100. Last time I raced last year we have great air and tight trip........DA was like 400ft went 6.52@104.......same tune a dew weeks ago with DA 4200ish car went 6.80 at 99.9 On my car every 100ft in day comes close to aveaging about. 007 in et change. My weather station have verified this many times........ithe weather can change especially around sunset several hundred feet in DA in just a few minutes...
My best 60' is 1.54 but still only ran 7.20s. Coan built the converter based on the specs I gave them but I may need to send it back. .4 is a lot to leave on the table.
What is your fuel system? I think it would be a good idea if you listed your engine/car combination. I tried looking at some of your threads, but didn't see anything.
Any idea how much power you are making......when i was running 12.0s my car would go 1.58. Which was way fast for the time but didn't gave a good top end...my heads were holding me back
1.55~1.60 in a 3900lbs gs is 11.30 to 60s 1.42~1.50 is high 10s The 60ft time is often just as accurate as mph in determining potential performance
464", partial fill hard block, wiseco forged dished pistons hung on 7.1 inch long alum rods. TA alum stg1 heads with 2.26 intake and 1.75 exhaust valves, ported to 350 cfm intake , 250 exhaust, @ .600 lift. Ta hydraulic roller cam with 4 - 7 firing order swap 248 duration @.050 intake .253 @ .050 exhaust and .620 intake lift and .617 exhaust lift with TA 1.65 roller rockers. Compression is right at 10.5 to 1. The engine made 608 horsepower and 580 torque. TH400 w/ custom Coan converter. The intake was a custom made one using intake using an SP1 and a Poston S-Divider. FITECH 1200hp efi,...BFG Drag Radials I have to find out the converter specifics.
Just spoke with a Rep from Coan....mine is a 9.5" converter built to stall 4000-4500 rpm...flashing at 4700-4800. I have to check my data logs to see what its actually flashing to. He said that is about the best he can do for me if I want to drive the car on the street. If I want to go any faster he'd have to build me an 8" stalling around 5k.
If its flashing that high you're spinning They haven't made BFG drag radials in years,...if that's what you're running they were garbage tires when they were new let alone old If you are running 275 60s go to a MT Pro 275 Or a pro bracket 28in radial
That should help.....you really shouldn't need more than 4200-4500 stall...it's not a Chevy! I like a tight 8in conv flashing to 4200. Streetable, lighter reciprocating weight, and you can feel shifts rather than driving thru the converter which a 5K conv will cause with a motor that you shift at 6000......
