How does this timeslip break down.

[Fat_Robi]

So this is not for a duramax but I figure you might be alble to shed some light on it for me. The car is a 68 camaro with a 454 putting about 525hp to the flywheel. I feel like it should be faster and quicker than this. Here are the numbers.

60' 1.929
330' 5.413
1/8 Mile 8.339
MPH 83.44
1000' 10.890
1/4 Mile 13.058
MPH 103.750

I know I was having traction issues so the 60' is slow but does the rest look right?

 

[duratothemax]

looks about right in my own opinion...auto trans??

ben

 

[Fat_Robi]

It has a 4l80E in it. How much would the ET come down with a better 60' time? and what is a reasonable 60' time with 15" wide tires?

 

[JoshH]

What kind of tires? Are they a drag racing tire like slicks or drag radials, or are they a street tire. Launching a high power car on street tires is gonna be tough. MPH seems kind of soft to me. I had a basically stock '00 Z28 that trapped higher than that. Is it shifting right?

 

[Fat_Robi]

What kind of tires? Are they a drag racing tire like slicks or drag radials, or are they a street tire. Launching a high power car on street tires is gonna be tough. MPH seems kind of soft to me. I had a basically stock '00 Z28 that trapped higher than that. Is it shifting right?

it has 29x18.5x15 mickey thompson sportsman tires that are a bit old and will be getting a new set of the same size sportsman pro tires with the 2ply wrinkle wall sidewall. it is tubbed with a 4 link so I would think hooking up shouldnt be a problem. We just had the trans rebuilt as well so once we get it running I am going to take it out again and hope for the best.

 

[gmduramax]

How much does it weigh?
The MPH seems low

 

[radvans]

are the hp numbers optimistic? has it been dynoed? what kind of rpms is it running?

 

[LT1BRD]

what kind of suspension does the rear have? what size gears? a good pair of slicks would help a lot. what kind of motor is it? you said you have a 4L80E in it...has it been tuned correctly...being electronic?

sorry for all the questions...just need to know what your are working with here. the car seems to have potential, but those numbers are low if you had to post on here questioning them.

 

[Fat_Robi]

THe HP numbers were from an engine dyno before we put it in the car. We have done some port matching and other work on the intake since then so it should have a bit more than that now. I think I was shifting at 6500 RPM or so but I don't remember because it was a while ago. It has a shift computer that all the controls lockup and all the settings and It is set up properly. The rear suspension is a 4 link on koni(I think) coilovers and a narrowed ford 9" rear end with 4.56 gears and a detroit locker. The engine is a 454 with 10:1 compression and a dart tunnel ram intake with a 4 barrel holley carb. I just think it should be doing better. How much is my 60' hurting me and what is reasonable to shoot for?

 

[malibu795]

should be 1.5-1.6 60' .3-.4 tenths faster.

 

[Kat]

The car is a 68 camaro

:nopic:

 

[Fat_Robi]

It needs a good paint job but here it is. And the hood just has a hole cut in it to clear the air filter and carb...

 

[LT1BRD]

nice :coolspot:
i've always wanted a 1st gen camaro.

try tires first. are you spinning a lot?
i've seen 3600 lb cars cut a 1.8 60' and run high 11's with less than 400 hp to the wheels.
do you know how much the car weighs?
what gear are you in at the end of the track?
even though the engine did 525, and you did more work to it, going through an auto and a 9"...you may be in the low to mid 400's at the wheels.
find out the weight and work on hooking up well and you'll gain more.

btw, what goals are you expecting out of the car...time wise?

 

[Fat_Robi]

nice :coolspot:
i've always wanted a 1st gen camaro.

try tires first. are you spinning a lot?
i've seen 3600 lb cars cut a 1.8 60' and run high 11's with less than 400 hp to the wheels.
do you know how much the car weighs?
what gear are you in at the end of the track?
even though the engine did 525, and you did more work to it, going through an auto and a 9"...you may be in the low to mid 400's at the wheels.
find out the weight and work on hooking up well and you'll gain more.

btw, what goals are you expecting out of the car...time wise?

I really have no goals, I was just pissed that I could not get below 13. It has been over a year since I took it down the track so i don't remember what gear I was in at the end of the track. I experimented with running 3rd to the redline and going to 4th as well but there was minimal difference. the tires are several years old so I know that is part of the reason I was spinning a little bit well past the 100' mark even after smoking them thoroughly in the burnout box. I am not sure what the weight of the car is though. and if you always wanted a 1st gen camaro I bet my dad would sell it to you... he always says he is going to sell it then never does. The was about a 10 year project and it still needs paint.:spit:

 

[Kat]

It needs a good paint job but here it is. And the hood just has a hole cut in it to clear the air filter and carb...

Nice Car :coolspot:

 

[LT1BRD]

very tempting...:drool:
i have some projects of my own i got to get out of the way first, or the wife will shoot me.

if you were spinning that bad, then you will be happy with the times once you hook up. i have a friend that couldn't get his supercharged car to do better than a 14.1. his friend lended him a set of slicks and he went 12.9.

 

[McRat]

Trap speeds and weight will indicate HP.

Here's what I do know. A paper-plate 2000 Camaro with 312rwhp and ~3800lb raceweight with a manual on street tires, trapped at 107.44. Automatics of the same year trap about 2-3mph lower. MT's will drop the MPH about 2-3mph. I would venture a guess that the car is losing power somewhere.

 

[LT1BRD]

ok, here's something i've always wondered...
take a 4th gen f-body. give it 350 rwhp and an auto and it runs mid 12's (here anyway). take a 1st gen f-body. give it 350 rwhp and an auto and it runs 13's.
where's the loss at?? aerodynamics? rotational mass? 4th gens are heavy cars, and most 1st gens weigh less than a 4th gen.

does the 4L80E take away more power than a 4L60E? i know they are heavier, so i would assume the rotational mass of the internal parts is greater, right?
at 525 hp, if you take away 20% for an auto and a 9", it'll be at 420 hp. 25% and it's roughly 390 hp. i've seen 390hp and 3600 lbs do 11.7 in the 1/4 through an auto.

anyway, your car has more potential than what the time slip shows for sure. let us know what when you play with it again.

 

[McRat]

Rwhp takes out the trans losses.

So it must be "area under the curve" or weight. Aerodynamics aren't much of an issue in the 12's. The LS1 engines have very good average output, but a SBC with the same power normally needs a peakier cam.

 

[LT1BRD]

Rwhp takes out the trans losses.

i sould have reworded that...sorry. they 4L60E vs 4L80E comment wasn't ment to be in relation to the rwhp topic.

So it must be "area under the curve" or weight. Aerodynamics aren't much of an issue in the 12's. The LS1 engines have very good average output, but a SBC with the same power normally needs a peakier cam.

that would explain it...didn't think about flat curve vs peak hp. thanks. :hug: