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Ready to see some more of the 60-130s and 1/4 passes thing is doing work!
Im picking up some 26x10x17in pro bracket radials tomorrow and likely heading back to the track this weekend.
I know 142mph out of a car that made 680 isn't all that impressive... and i don't expect most to take into consideration what a bias ply does to mph or the fact that i was creeping back up on the fuel and timing. But, it's gonna go a minimum of 145 if we get halfway decent air at its current weight on 26s. I have all the timing back in it as well. No velocity stack out the front to solve the kpa drop, yet. I'll get that on the car for next year along with the diet.
Goals this weekend are an official sub 5.50 60-130, 145mph trap, 9.7s or better on the radial. One last push before winter!
Last edited by Ryans99ls1; Oct 30, 2024 at 12:48 PM.
28" bias plys are definitely not doing you any favors. My silver car trapped 142.5mph on a 26" radial in ~2000DA @ 650ish whp. You should definitely have 145+ in yours
Im picking up some 26x10x17in pro bracket radials tomorrow and likely heading back to the track this weekend.
I know 142mph out of a car that made 680 isn't all that impressive... and i don't expect most to take into consideration what a bias ply does to mph or the fact that i was creeping back up on the fuel and timing. But, it's gonna go a minimum of 145 if we get halfway decent air at its current weight on 26s. I have all the timing back in it as well. No velocity stack out the front to solve the kpa drop, yet. I'll get that on the car for next year along with the diet.
Goals this weekend are an official sub 5.50 60-130, 145mph trap, 9.7s or better on the radial. One last push before winter!
Also remember Logans advice on what McCleod told him on launch rpm. That makes perfect sense as Ben launches his and has the best results at 6500-7k rpm. We still run a 17" DR2 on his car.
(And we need that clutch tamer from Garrett haha.. My buddy had Garrett look at his c5 this past weekend to get some ideas on where and how to mount it, should have something for the c5 and c6 soon it sounds like)
28" bias plys are definitely not doing you any favors. My silver car trapped 142.5mph on a 26" radial in ~2000DA @ 650ish whp. You should definitely have 145+ in yours
For sure. I knew they would show low, but make my life easier getting the 9 I was desperate for. And I'm gonna need them for the local no prep's I would like to enter next year. It's why i was so impressed the car still went 142 since they straight up eat mph. Now i can mess with the 26's and care a lot less about ET. They're going to be far more picky with the launch and track prep. But it'll be a more apples to apples comparison against what most are used to.
Originally Posted by 02EBC5Z06
Also remember Logans advice on what McCleod told him on launch rpm. That makes perfect sense as Ben launches his and has the best results at 6500-7k rpm. We still run a 17" DR2 on his car.
(And we need that clutch tamer from Garrett haha.. My buddy had Garrett look at his c5 this past weekend to get some ideas on where and how to mount it, should have something for the c5 and c6 soon it sounds like)
For sure. I knew they would show low, but make my life easier getting the 9 I was desperate for. And I'm gonna need them for the local no prep's I would like to enter next year. It's why i was so impressed the car still went 142 since they straight up eat mph. Now i can mess with the 26's and care a lot less about ET. They're going to be far more picky with the launch and track prep. But it'll be a more apples to apples comparison against what most are used to.
I don't think I saw the advice on launch rpm?
it was a post I made in some Facebook page under my buddies thread. When I was speaking to McLeod some years ago, they mentioned take your peak torque rpm and add 1000 to it, and should launch from there.
Looking back and realizing in my situation it worked well, my old torque peak was around 5600ish and playing around with launch rpm 6500 was where it liked to be. 7000 was too much and anything under it would really bog.
it was a post I made in some Facebook page under my buddies thread. When I was speaking to McLeod some years ago, they mentioned take your peak torque rpm and add 1000 to it, and should launch from there.
Looking back and realizing in my situation it worked well, my old torque peak was around 5600ish and playing around with launch rpm 6500 was where it liked to be. 7000 was too much and anything under it would really bog.
Just some food for thought
Lol that is definitely the goal but you gotta have the prep for it. I'd love to have a track that could hold it! My car typically bogs 1500ish RPM from launch rpm, so the 6500rpm leave i wanted would have put me around there. my 9.8 pass was a 4600rpm bog, peak torque is 5200ish, i was trying.. track wouldn't allow much more.
Lol that is definitely the goal but you gotta have the prep for it. I'd love to have a track that could hold it! My car typically bogs 1500ish RPM from launch rpm, so the 6500rpm leave i wanted would have put me around there. my 9.8 pass was a 4600rpm bog, peak torque is 5200ish, i was trying.. track wouldn't allow much more.
that’s a pretty solid start! Falling near peak torque for sure. Yeah for sure need the track to be there, fortunately have some of the best prep in the game with TJ at the Texas Motorplex.
Didn't hit my goals. But we ever so slightly improved and I drove it on the trailer running. Cracking into the 1.3 60fts has me excited for next year because the switch to these mickey pro bracket radials made it WAY too easy. It did it with almost 1000 less launch rpm compared to the slicks!
But I am completely surprised that the car didn't pick up more mph, or really any with the switch back to a radial. It consistently went 141-142 all day though and every pass was a 9sec pass. I had to baby the 1-2 shift all day too, logs were showing .5-.6 sec shift time on that one, and i've hit that at .3 pretty regularly. No biggie. I'll take care of it but couldn't take advantage of the quicker 60s.
Car was also MUCH richer on the top end compared to last outing and airflow appeared to be significantly less in the logs. The DA was nothing special at +350ish during my best. I just go back to the log from the 60-130 above.. nothing has come close to the night it made that pull when i compare logs. Car was rolling with that air. Some investigation to do but nothing obvious.
Velocity stack and some weight reduction for next year. Can't complain about a strong ending to the year!
1.38.... incredible! I am going to be that guy... what is your launch ritual or suspension settings that you think are helping? Also surprised between the air density, radial tires, etc that the mph is not up more. The shift time could be killing all of your gain but just speculating. Still awesome considering everything! Congrats!
1.38.... incredible! I am going to be that guy... what is your launch ritual or suspension settings that you think are helping? Also surprised between the air density, radial tires, etc that the mph is not up more. The shift time could be killing all of your gain but just speculating. Still awesome considering everything! Congrats!
Aside from the standard answer of seat time, treat your clutch like the most hated thing in your life. Slip the ever living **** out of it and slip it some more. Also, my secret is that I race barefoot. Can't feel **** with shoes on, always been that way since high school lol.
Suspension is totally stock other than the AMT mounts which have been a godsend in killing all the drivetrain movements.
I'm convinced i have an airflow issue going on somewhere that i haven't pinpointed. I'm going to figure it out but the fuel data varying that much is telling of airflow being pissed off or disturbed somewhere. I've got some ideas but won't know until spring, unfortunately.
Better 60ft plus the longer shifts explain most of the reason there wasn't much or any MPH gain. Assuming DA was worse too?
DA was much better but water grains were similar. I haven't really been able to pinpoint why the car varies between 110-112 to the 8th or why it goes faster et/mph wise to the 8th and slows down up top. My 2,3 shifts are very consistent. My most recent pass was the fastest 60 (1.38 vs 1.44) and 1/8 ( 6.32 vs 6.331) and it didnt translate to really anything up top (0.005). The slower 1-2 kind of explains the 8th mile part, but only gaining .005 et up top points to something else, and all i can see so far is that i was shifting later by a few hundred rpm. No timing issues.
The only thing I have found that seemed to show difference with the 142 passes was shifting earlier in every gear, especially on the 1-2. Which is kind of surprising but now that i am lashing it correctly and i moved the merge in the mid pipe closer to the header collectors, i think it picked more mid range than what i dyno'd with and is starving up top more, because i have had to re-shape that middle part of the VE table the most. It was pretty lean in the 6000-7000 range compared to original file.
It's a long winded answer, but i want to fix the intake vacuum with the velocity stack first. Gotta hold 100kpa through the entire rpm range, then i will figure out where it actually wants shifted when it's getting the amount of air it needs.
Best 60-130 I could muster this year. Couldn't get it to dead hook at the cold temps, but this was the run that spun the least. Confident it had 5.5's in it but sadly nothing official. 2nd and 3rd gear pull on the 28s pulling to 8k.
Spring is in the air so why not post an update. Should be getting some quality time in the garage soon enough.
1. Build the velocity stack out of the front bumper to solve kpa issue. If that doesn't solve it, I will build a sealed box/plenum where the air filter sits now.
2. Install lighter brakes i've had sitting on the shelf forever now.
3. Remove driver and passenger seats and mounts. Install AMT seat mounts and Tillett (if i can get the seat in a reasonable time. otherwise kirkey it is)
4. Install clutch tamer (hitmaster) - and adjust master to hopefully help speed back up the 1-2 shift.
5. Re-wire my rpm based controllers so that they work above 7500rpm - had some bandaids in place for last year
6. Get the full exhaust fab'd and back on the car.
7. Improve crankcase ventilation
8. Switch to some hoosier bias ply front runners
9. Race the July drag and drive event i missed last year
10. Continue the chase for 9.50s in fall
I did buy an oem faceplated t56 gearset in January. No plans to take the transmission out this year but those will go in eventually. Also hard not to consider experimenting with some better fuels at some point. The c85/m5/nitro mix for the track would make for some nice gains and glory passes!
Spring is in the air so why not post an update. Should be getting some quality time in the garage soon enough.
1. Build the velocity stack out of the front bumper to solve kpa issue. If that doesn't solve it, I will build a sealed box/plenum where the air filter sits now.
2. Install lighter brakes i've had sitting on the shelf forever now.
3. Remove driver and passenger seats and mounts. Install AMT seat mounts and Tillett (if i can get the seat in a reasonable time. otherwise kirkey it is)
4. Install clutch tamer (hitmaster) - and adjust master to hopefully help speed back up the 1-2 shift.
5. Re-wire my rpm based controllers so that they work above 7500rpm - had some bandaids in place for last year
6. Get the full exhaust fab'd and back on the car.
7. Improve crankcase ventilation
8. Switch to some hoosier bias ply front runners
9. Race the July drag and drive event i missed last year
10. Continue the chase for 9.50s in fall
I did buy an oem faceplated t56 gearset in January. No plans to take the transmission out this year but those will go in eventually. Also hard not to consider experimenting with some better fuels at some point. The c85/m5/nitro mix for the track would make for some nice gains and glory passes!
Sounds like some good improvements to come. What are your plans for the crankcase ventilation? Curious about that hitmaster too, I have not heard of anyone using that before.
Sounds like some good improvements to come. What are your plans for the crankcase ventilation? Curious about that hitmaster too, I have not heard of anyone using that before.
Probably just another catch can for the driver side. I still go back and forth on adding a vac pump, even if just for the track.
Hitmaster install is very straight forward. Already plumbed it in, just need to fine tune the engagement point when it's on the ground.
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