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I might have posted on this awhile back but I've been doing some work getting the car ready to run so it looks quite a bit more tidy. Has been sitting since it last ran but I'll get it running this year.
427 dart little M block
AFR 210 eliminator heads
solid roller comp cans. .630 lift, 245 duration at .05
comp cams roller rockers and afr stud girdles
ported Motown efi intake. Fits under stock L82 hood
Mahle forged pistons 10.3:1 compression
scat crank
scat polished I beam rods
Fast efi. Just rewired whole car
MSD crank trigger
hooker headers , side pipes and uncapped sts spiral baffles
Last edited by Corvettedave02; Feb 10, 2023 at 12:05 PM.
Nice truck! but to push nearly 4,000 lbs,,, lot of weight..
maybe you can do it... been wrong before.
I would like to hear back from you after your first run.
My son wants one of those trucks..
I remember a 427 AC Cobra met up with me one day, I was with my 383, about the same power as you are stating... and all I could do is watch his tail light fade away in front of me...
saw him 30 minutes later at the car show we were going to, he told me he was around 500hp 427, and 2300 lbs! I was at the time 800 lbs heavier, about same power.... .......weight, I learned a lesson that day... about every 5 lbs equals 1 hp. = 160 more hp needed to keep up with him. good lesson I learned that day, long ago,,
seriously would love to see you pull a low 11. That would set back a lot of people including me.
You'd be seeing my trucks tail lights too........................
under 3000 lbs
540hp to 550 TQ at the rear wheels
427 sbc power band from 2k on up past 6500
When you can post some time slips then we can put a real HP number on it. Chassis dyno numbers mean nothing-there good for one thing and one thing only, tuning and thats it.
When you can post some time slips then we can put a real HP number on it. Chassis dyno numbers mean nothing-there good for one thing and one thing only, tuning and thats it.
I own my own in-ground dyno:-)
and there is no 1/4 in my area, but i do road race, as willow springs is down the street:-)
i friggen SMOKE dodge Demons:-). last time i dropped the clutch at 70 to 3rd. i twisted both spindles in half:-)
Are you sure? And please theres no issue with your skepticism with me, I welcome it.
"Wow... those are big block numbers...." Not my big blocks
Cam specs: 264/264/.528/.528/108/104
Head flow what I remember. @ 28 Inches .300 201
.500. 250s
I will try and find the dyno sheet.
So lets get back to my 1979 long bed C-10 Big 10 truck, is there anyone on this forum that believes this truck weighs 3600 pounds with a person in it? By the way my 327 ran 12.0s in this same truck. Keep in mind this was not tested on my dyno, but independently tested on another shops dyno.
I was wondering how you were making that power and thought it may be just math and RPM…..but should have known….you are at 103% VE up to 5600rpm…..very nice.
I own my own in-ground dyno:-)
and there is no 1/4 in my area, but i do road race, as willow springs is down the street:-)
i friggen SMOKE dodge Demons:-). last time i dropped the clutch at 70 to 3rd. i twisted both spindles in half:-)
I'm sure you do. Have you ever considered getting a engine dyno? Whats the barometer right now where your at?
I was wondering how you were making that power and thought it may be just math and RPM…..but should have known….you are at 103% VE up to 5600rpm…..very nice.
Jebby
I don't trust the numbers off this dyno (RPM numbers), all my engines peak low (RPM) on this dyno for some reason, I know my HP peak is around 6400 RPM, although the TQ peak seems reasonable. I had 499 observed HP @ 900 feet elevation, I can't remember the conditions. I show roughly the observed HP going down the track in street trim, but you'll never show corrected HP in a truck, to many loses. My truck runs 11.20s in race trim, and 11.40 in street trim. Good enough for a daily driver shop truck with a production 350. A shorten of the bed and a carbon fibre drive shaft, and Lamb front brakes-I got a 10 sec truck.
Last edited by Vortecpro; Feb 11, 2023 at 08:18 AM.
Nice truck! but to push nearly 4,000 lbs,,, lot of weight..
maybe you can do it... been wrong before.
I would like to hear back from you after your first run.
Attach a huge helium "balloon" to truck's bed to "lighten" the weight... but of course that may effect rear wheel traction!!
Paul, Steve Barker has proven his chassis dyno is accurate with 1/4 mile runs to back the numbers. He makes the effort to ensure his testing simulates the runs at the track. I believe his latest best is a 9:15 et at 147 mph. This is the 67 with tri power not his son's 69 with the 632.
Paul, Steve Barker has proven his chassis dyno is accurate with 1/4 mile runs to back the numbers. He makes the effort to ensure his testing simulates the runs at the track. I believe his latest best is a 9:15 et at 147 mph. This is the 67 with tri power not his son's 69 with the 632.
Paul, Steve Barker has proven his chassis dyno is accurate with 1/4 mile runs to back the numbers. He makes the effort to ensure his testing simulates the runs at the track. I believe his latest best is a 9:15 et at 147 mph. This is the 67 with tri power not his son's 69 with the 632.
I've never looked at Steve Barkers data, but I can tell you EVERY TIME I'VE ASKED a chassis dyno operator what the baro was they looked at me like I was from outer space, this is one of the main data points that sets the correction factor. Theres always a lot of variances between chassis dyno data, thats not to say its all wrong, just a lot of variances.
In my case, I knew I had 537 corrected HP, I also knew I had 499 observed HP before the correction factor was applied, I also knew the dyno I tested on was very close to my dyno in HP data even though it was a different brand of dyno, so I had a "very good" idea of what my 3970 pound truck would run in a 1425 DA conditions. So I took the truck too the drag strip, the ultimate truth teller of HP, the very first pass down the track it went:
1st pass. 7.28 @ 92.6 MPH
2. pass 7.33 @ 93 MPH rolled the light, foot brake wouldn't hold it
3. pass. 7.22 @ 93.15 MPH hurt a leaf spring ended testing
All 1/8 mile runs, all though the mufflers with power steering in street trim, remember the dyno testing was in race trim. So heres the math:
93.15 MPH in 660 feet = 499 cranshaft HP
7.22 X 1.57 = 11.33 in street trim with 3 passes on a new combination. When I get it dialed in and put it on kill it will be a couple tenths quicker in 1/4.
Last edited by Vortecpro; Feb 11, 2023 at 08:17 AM.
I might have posted on this awhile back but I've been doing some work getting the car ready to run so it looks quite a bit more tidy. Has been sitting since it last ran but I'll get it running this year.
427 dart little M block
AFR 210 eliminator heads
solid roller comp cans. .630 lift, 245 duration at .05
comp cams roller rockers and afr stud girdles
ported Motown efi intake. Fits under stock L82 hood
Mahle forged pistons 10.3:1 compression
scat crank
scat polished I beam rods
Fast efi. Just rewired whole car
MSD crank trigger
hooker headers , side pipes and uncapped sts spiral baffles
What were your dyno numbers should be close to 650 hp .
For the record , time slips and mph are fact and not subject to creative input. Mark, I have seen you back up dyno numbers with et slips many times. Total respect from my end here.
Yes thats something there, can you post pictures of it finished, I'd like to see that. You know where I live now I'm not sure where you'd find someone to do that kind of work, or even if you could. The city of Thousand Oaks did not want to give me the building permit to build the garage, me wife got to them and explained it: "If he doesn't get his garage, I don't get my house"
Yes thats something there, can you post pictures of it finished, I'd like to see that. You know where I live now I'm not sure where you'd find someone to do that kind of work, or even if you could. The city of Thousand Oaks did not want to give me the building permit to build the garage, me wife got to them and explained it: "If he doesn't get his garage, I don't get my house"
