Finally got the Buick out to the track for the first time. First couple runs was a learning curve with lots of spinning thru first. After dropping to MT ET Streets from 25 to 15 lbs and leaving at idle, shifting at 6k I netted these two times. I think I may need converter work because this one was set up for another combination. For those of you with experience reading time slips...what does these tickets tell you?
Looks healthy but definitely need to get your 60 ft time down. What gears are you running and what RPM / gear are you crossing the line at? Dialing in is some trial and error and we always hope for less error.
It's a mover. The 60's seem a bit slow and the mph high for how quick the car is so there looks to be plenty of room for a looser converter. That works out to a 11.52/118.88 which is a high mph for the ET. (For a street car I like a higher MPH because you rarely go from a dead stop.) The ET calculates to 501 HP and the MPH shows 534 HP so that backs up the difference also. I used 3900 lbs. as a weight to figure. Facts and figures for your car would help and the track, day, and time would also help figure things out. If you expected an 11 second car you're doing good, if you figured a 10 second car you've got work to do. I run my MT Drag Radials at 18-20 lbs.
You try short shifting 1st gear? It's stout for the first time out, get the converter restalled and go from there , no sense in wasting time trying to figure out what you have when you k ow the converter isn't optimal
I'm running 4.10 gears and crossing the line at about 5800-6k...still have to review the data log info. I was running here in NC yesterday, during the day...approximately 85-88 degrees. I have not tried short shifting.
Based on the first part of this line, I should refrain from answering. But here goes anyways...you were faster than the lane next to you.
Not a converter issue but not enough stall speed in the converter. Unless you were still spinning your tires on those runs, then it is a traction issue. Of course there could be some timing/carb issues but you seem to be making plenty of HP once you get out of the hole.
Try getting up on the converter and shifting to 2nd around 5500 see what happens, if it was hooking on those 2 runs you need more stall speed, bases on your mph you have enough for low 1.50 60's which would put you around 6.90's
Leave on the last yellow bulb.(sleeping) For a street car its doing great. You are turning in faster ET and MPH than my last build in the Regal @ 2900lbs.
If your rear tires have been on the street for more then 2 years then they have little oil left in them and you will never get to the 60 times your able to have !
First couple passes with radials you gotta be mean to them ha, most tracks are definitely prepped for slicks tho radial prep is completely different. And test and tune days are a wasted trip all the tards out there on street tires, mud tires and who knows what boogerin up the track its impossible to get any real data
OK Just came back from the track...This time we replaced the converter with one my friend thought would work better. In addition, we opened the dumps, removed the front sway bar and mounted on a set of slicks (15lbs). We made 4 passes but leaving the line at 2K gave us the best results, lifting the front left tire about 4-6 inches off the ground. But each time, the engine ran up to the 6200 rpm rev limit almost instantly. I did not have my Fitech handheld controller with me so I was unable to change the rev limit at the track. We intend to increase the rev limit to about 6500 rpm and go back a try it again with the same converter. The engine seems to rev up very quickly and I'm making my 5500 rpm shift pretty quick. I think its still a converter issue and wanted to know what you guys thought....I'll try to post the video when I get it. thanks Mike
455 block bored to 4.36 inches, 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 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
Either having traction issues or serious converter problems. Whats the rear end gearing? You should be hitting 1.4's 60'
according to this post he is running a 4.10 gear. I would move down to a 3.73 or even 3.42 and load that converter up. Engine makes plenty of torque and a tall tire would do the same. 28-29" if you can fit em. looks like you are doing plenty well for a street car
With head flow like you have on hand and what I am guessing is your accompanied port volume I would say you will have better track times shifting at 6600.
