et vs mph
10-09-2004, 08:58 AM
#1
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,730
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
et vs mph
Been running my newish setup at the track. I'm having some traction problems intermitantly. Heres a run from last night:
60 foot: 3.00
1/9th et: 9.1
8th mph: 90.93
1/4 et: 12.40
1/4 mph: 119
Now, the 119mph in the 1/4 leads me to believe with better traction out i'd be running 11s.. Any opinions?
I was cutting 1.80 60 foots on these drag radials wednesday, but 2 of my intake rockers backed off and bent the pushrods, so I ended up with a sorta complete pass. The weird thing was, the car, after the pass skipping studdering and running on 6 cyls (both intake pushrods were off hte rocker) still ran 12.40 @ 114mph.
-- Joe
60 foot: 3.00
1/9th et: 9.1
8th mph: 90.93
1/4 et: 12.40
1/4 mph: 119
Now, the 119mph in the 1/4 leads me to believe with better traction out i'd be running 11s.. Any opinions?
I was cutting 1.80 60 foots on these drag radials wednesday, but 2 of my intake rockers backed off and bent the pushrods, so I ended up with a sorta complete pass. The weird thing was, the car, after the pass skipping studdering and running on 6 cyls (both intake pushrods were off hte rocker) still ran 12.40 @ 114mph.
-- Joe
10-09-2004, 10:52 AM
#2
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,114
Likes: 0
Received 121 Likes
on
102 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
A Neon could get a better 60' time than that. 3 seconds is total tire spin. Buy some slicks!!
119 mph is good for mid 11's but it will depend on the diff gear ratio. If it's matched so the the engine hits the shift point at or just before the finish line then mid 11's could be had.
When I had a 383 SBC in my car I ran 118 mph but only at 12.0. I had 3.27 gears and 26" tall tires. I was starting to pull in the powerband at about the 1000 foot mark. When I crossed the finish line I still had a lot of rpm to go before topping out. Switching to 4.10 gears dropped me easily into the 11's but then I also switched engines.
119 mph is good for mid 11's but it will depend on the diff gear ratio. If it's matched so the the engine hits the shift point at or just before the finish line then mid 11's could be had.
When I had a 383 SBC in my car I ran 118 mph but only at 12.0. I had 3.27 gears and 26" tall tires. I was starting to pull in the powerband at about the 1000 foot mark. When I crossed the finish line I still had a lot of rpm to go before topping out. Switching to 4.10 gears dropped me easily into the 11's but then I also switched engines.
10-10-2004, 09:50 PM
#3
TGO Supporter
Join Date: Dec 2001
Location: ELIZABETH,PA,USA
Posts: 2,308
Likes: 0
Received 0 Likes
on
0 Posts
Re: et vs mph
Originally posted by anesthes
Been running my newish setup at the track. I'm having some traction problems intermitantly. Heres a run from last night:
60 foot: 3.00
1/9th et: 9.1
8th mph: 90.93
1/4 et: 12.40
1/4 mph: 119
Now, the 119mph in the 1/4 leads me to believe with better traction out i'd be running 11s.. Any opinions?
I was cutting 1.80 60 foots on these drag radials wednesday, but 2 of my intake rockers backed off and bent the pushrods, so I ended up with a sorta complete pass. The weird thing was, the car, after the pass skipping studdering and running on 6 cyls (both intake pushrods were off hte rocker) still ran 12.40 @ 114mph.
-- Joe
Been running my newish setup at the track. I'm having some traction problems intermitantly. Heres a run from last night:
60 foot: 3.00
1/9th et: 9.1
8th mph: 90.93
1/4 et: 12.40
1/4 mph: 119
Now, the 119mph in the 1/4 leads me to believe with better traction out i'd be running 11s.. Any opinions?
I was cutting 1.80 60 foots on these drag radials wednesday, but 2 of my intake rockers backed off and bent the pushrods, so I ended up with a sorta complete pass. The weird thing was, the car, after the pass skipping studdering and running on 6 cyls (both intake pushrods were off hte rocker) still ran 12.40 @ 114mph.
-- Joe
http://www.corral.net/tech/brakehp.html
Almost always within 1/10 on my car,
It has yours @ 11.37
10-17-2004, 03:12 PM
#4
Supreme Member
iTrader: (1)
Join Date: Jun 2003
Location: Elgin, IL
Posts: 3,085
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1997 Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73 IRS
That's a cool calculator. A bit different from others I've seen.
Pretty accurate for my car too, assuming flywheel HP numbers. Would those numbers be RWHP or flywheel HP? Since it mentions fuel stuff (not sure how accurate that is, as there are many variables affecting air/fuel mix), I would assume it is crank HP.
My stock times, it has me at 189HP vs. the "rated" 195HP (my car had very worn and poorly gapped plugs that run too, so I'm sure some power loss), and for the times I took yesterday with my laptop, it has me at 217HP, which I'd guess is about right with what I've done to it so far.
Says for a 100MPH trap speed, my 3500lb car will need 280HP..
Pretty accurate for my car too, assuming flywheel HP numbers. Would those numbers be RWHP or flywheel HP? Since it mentions fuel stuff (not sure how accurate that is, as there are many variables affecting air/fuel mix), I would assume it is crank HP.
My stock times, it has me at 189HP vs. the "rated" 195HP (my car had very worn and poorly gapped plugs that run too, so I'm sure some power loss), and for the times I took yesterday with my laptop, it has me at 217HP, which I'd guess is about right with what I've done to it so far.
Says for a 100MPH trap speed, my 3500lb car will need 280HP..
Last edited by DuronClocker; 10-17-2004 at 03:19 PM.
10-18-2004, 09:19 AM
#5
TGO Supporter
Join Date: Dec 2001
Location: ELIZABETH,PA,USA
Posts: 2,308
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by DuronClocker
That's a cool calculator. A bit different from others I've seen.
Pretty accurate for my car too, assuming flywheel HP numbers. Would those numbers be RWHP or flywheel HP? Since it mentions fuel stuff (not sure how accurate that is, as there are many variables affecting air/fuel mix), I would assume it is crank HP.
My stock times, it has me at 189HP vs. the "rated" 195HP (my car had very worn and poorly gapped plugs that run too, so I'm sure some power loss), and for the times I took yesterday with my laptop, it has me at 217HP, which I'd guess is about right with what I've done to it so far.
Says for a 100MPH trap speed, my 3500lb car will need 280HP..
That's a cool calculator. A bit different from others I've seen.
Pretty accurate for my car too, assuming flywheel HP numbers. Would those numbers be RWHP or flywheel HP? Since it mentions fuel stuff (not sure how accurate that is, as there are many variables affecting air/fuel mix), I would assume it is crank HP.
My stock times, it has me at 189HP vs. the "rated" 195HP (my car had very worn and poorly gapped plugs that run too, so I'm sure some power loss), and for the times I took yesterday with my laptop, it has me at 217HP, which I'd guess is about right with what I've done to it so far.
Says for a 100MPH trap speed, my 3500lb car will need 280HP..
It is always very accurate for me and it does give flywheel HP.
Glad you like it!
10-18-2004, 12:58 PM
#6
Supreme Member
Join Date: Jul 1999
Location: out of my mind; be back in 5 minutes....
Posts: 1,593
Likes: 0
Received 3 Likes
on
2 Posts
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
Initial Readings
READING | OUTPUT | UNITS
WEIGHT | 3400 | pounds
TRAP SPEED | 98.7 | mph
E/T | 14.494 | seconds
Dyno Readings
READING | OUTPUT | UNITS
Total Horsepower | 260 | bhp
Horsepower Used | 220 | bhp
Best E/T | 13.71 | seconds
This is for the LG4 from my (late) 83 SC...
Trending Topics
10-18-2004, 04:28 PM
#8
TGO Supporter
Join Date: Dec 2001
Location: ELIZABETH,PA,USA
Posts: 2,308
Likes: 0
Received 0 Likes
on
0 Posts
Its giving your ideal ET vs HP from trap speed..
I think 14.09 as opposed to 14.02 is pretty dam close..
You also can not blame the calculator for you driving errors!
It says best ET according to 98 MPH should and can better than 13.7 - its telling you you could run the same time with less power given you or your car was more effecient..
You cannot blame the calc for you mistakes.
So there for you are not using all available power.
I am usually about 1/10 faster than my ideal because my car is effecient for its HP.
I think 14.09 as opposed to 14.02 is pretty dam close..
You also can not blame the calculator for you driving errors!
It says best ET according to 98 MPH should and can better than 13.7 - its telling you you could run the same time with less power given you or your car was more effecient..
You cannot blame the calc for you mistakes.
So there for you are not using all available power.
I am usually about 1/10 faster than my ideal because my car is effecient for its HP.
10-18-2004, 05:44 PM
#9
You also can not blame the calculator for you driving errors!
It says best ET according to 98 MPH should and can better than 13.7 - its telling you you could run the same time with less power given you or your car was more effecient..
You cannot blame the calc for you mistakes.
So there for you are not using all available power.
I am usually about 1/10 faster than my ideal because my car is effecient for its HP.
It says best ET according to 98 MPH should and can better than 13.7 - its telling you you could run the same time with less power given you or your car was more effecient..
You cannot blame the calc for you mistakes.
So there for you are not using all available power.
I am usually about 1/10 faster than my ideal because my car is effecient for its HP.
What are you saying? that the calc shows 14.09 to my 14.02 and should be high 13's cuz i do feel more is in it. Especially with radials. Does it mean that I should have ran no faster than 14.09? it said, i used more hp than total. hows that possible? And what about the fuel delivery stats? just curious. LOL
89 Iroc L98 leather, A/C, 3 inch catback and rest mods in my sig. i wiegh 140 lbs so the car and me wieghs about 3500. is that about right? How much does a camaro weigh in at? figured around 3400lbs.
10-18-2004, 08:03 PM
#10
TGO Supporter
Join Date: Dec 2001
Location: ELIZABETH,PA,USA
Posts: 2,308
Likes: 0
Received 0 Likes
on
0 Posts
I can't believe you are being that ****?
14.02 to 14.09 is a very good guess from what I think...
I am sure you can run 13.s but that just means you are using your HP very effeciently! What the problem with that? Its a math calculator man!
give it a break..
You really don't think thats pretty accurate?
As for the fuel consumption, its only calcualting a BSFC which is hard for anyone to do.. But I would say its pretty close! Stock injectors = 22 lbs per hr. now multiply that x 80% duty cycle which is all your inj. should really need. Guess what that gives you
Bingo! 17.6 lbs per hr. of fuel flow at max HP/TQ.
BUt it can only give a rough guess from HP alone.. Even the best BSFC calculators can only give you what it thinks you need.. Only you and your engine can determine how effeciently it uses its fuel and with what a/f the car runs best.
14.02 to 14.09 is a very good guess from what I think...
I am sure you can run 13.s but that just means you are using your HP very effeciently! What the problem with that? Its a math calculator man!
give it a break..You really don't think thats pretty accurate?
As for the fuel consumption, its only calcualting a BSFC which is hard for anyone to do.. But I would say its pretty close! Stock injectors = 22 lbs per hr. now multiply that x 80% duty cycle which is all your inj. should really need. Guess what that gives you
Bingo! 17.6 lbs per hr. of fuel flow at max HP/TQ.
BUt it can only give a rough guess from HP alone.. Even the best BSFC calculators can only give you what it thinks you need.. Only you and your engine can determine how effeciently it uses its fuel and with what a/f the car runs best.
10-18-2004, 08:19 PM
#11
oh man, i am sorrybut i sounded alot more **** about that. i aint real **** about it, it just doesnt seem accurate to me at first. I can car less. LOL Just asking about how it works. LOL
I just curious as to how it worked. LOL it seems accurate enough, but i was hoping it would tell me what my car is capable of. LOL i hope to hit 13's. I posted awhile back about what you all might think i could hit, and high 13's like 13.90 seems possible. LOL thanks for some clarification as to that calculator.!
I just curious as to how it worked. LOL it seems accurate enough, but i was hoping it would tell me what my car is capable of. LOL i hope to hit 13's. I posted awhile back about what you all might think i could hit, and high 13's like 13.90 seems possible. LOL thanks for some clarification as to that calculator.!
Thread
Thread Starter
Forum
Replies
Last Post
darwinprice
Organized Drag Racing and Autocross
17
10-11-2015 11:51 PM
