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loose 750lb et change? #1549674
12/18/13 02:26 AM 12/18/13 02:26 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
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71RTC  Offline OP
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middle tennessee
got a new car with more tire and 4.88 gears any idea of what kind of et change can I get, old car has 4.10s and 750lbs heaver and runs 6.50 to 6.40 on motor??????
Re: loose 750lb et change? [Re: 71RTC] #1549675
12/18/13 02:28 AM 12/18/13 02:28 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
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71RTC  Offline OP
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middle tennessee

Re: loose 750lb et change? [Re: 71RTC] #1549676
12/18/13 02:31 AM 12/18/13 02:31 AM
Joined: Feb 2005
Posts: 20,180
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

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PA.
You will get a lot better info if you include transmission and engine combo in your post. Going by the book with the info you gave if you ran 10.75 before a guess-ta-ment would be 10.00's. More info better guess-ta-ment.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time
Re: loose 750lb et change? [Re: pittsburghracer] #1549677
12/18/13 02:54 AM 12/18/13 02:54 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
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71RTC  Offline OP
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middle tennessee
sorry it has a 727, 511 with indy -1cnc, engine made 766hp on motor and has a two stage plate with 150hp on each shot but those times were on motor (kept breaking the trans even on one shot), the engine is in my 71 challenger but the car is too nice to tear up so was gunna pull the 511 and put in this stealth, thanks it ran 6.40 at 108

7962624-032.JPG (81 downloads)
Last edited by 71RTC; 12/18/13 02:57 AM.
Re: loose 750lb et change? [Re: 71RTC] #1549678
12/18/13 02:57 AM 12/18/13 02:57 AM
Joined: Jun 2004
Posts: 6,780
Alabama
Mopar-Al Offline
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Mopar-Al  Offline
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Alabama
I saw that car forsale on CL FT Payne area. Looked heavey in the pics. Good luck with it
Re: loose 750lb et change? [Re: 71RTC] #1549679
12/18/13 03:00 AM 12/18/13 03:00 AM
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Sport440 Offline
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Canton, Ohio
Id say 5.8s to 5.9,s You could bust in the 5.7,s but I doubt it with a new combo. Heck you may not get down the track at all. How good are you at putting new combos together.

Re: loose 750lb et change? [Re: Mopar-Al] #1549680
12/18/13 03:01 AM 12/18/13 03:01 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
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71RTC  Offline OP
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middle tennessee
yeah I weighed it last night 2100lb as a roller but my car now is 3850lb so it will be a lot lighter and still has a lot that I will take out of it, I traded a 4wd truck for it so im not hurt in the trade
Re: loose 750lb et change? [Re: Sport440] #1549681
12/18/13 03:03 AM 12/18/13 03:03 AM
Joined: Feb 2005
Posts: 20,180
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pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

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4:88 gears will probably have to go. I ran a 4:30 gear in my NA Daytona but even that may be to deep for you with the NOS.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time
Re: loose 750lb et change? [Re: pittsburghracer] #1549682
12/18/13 03:06 AM 12/18/13 03:06 AM
Joined: Feb 2005
Posts: 20,180
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

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PA.
What is the cage cert legal to?

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time
Re: loose 750lb et change? [Re: pittsburghracer] #1549683
12/18/13 03:07 AM 12/18/13 03:07 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
member
71RTC  Offline OP
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Joined: Mar 2008
Posts: 62
middle tennessee
Quote:

4:88 gears will probably have to go. I ran a 4:30 gear in my NA Daytona but even that may be to deep for you with the NOS.

thanks I have a 4.10 I can try, never ran anything lower than that!!!
Re: loose 750lb et change? [Re: pittsburghracer] #1549684
12/18/13 03:09 AM 12/18/13 03:09 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
member
71RTC  Offline OP
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Posts: 62
middle tennessee
Quote:

What is the cage cert legal to?

i don't know! lol I think it was a grudge race car
Re: loose 750lb et change? [Re: pittsburghracer] #1549685
12/18/13 08:59 AM 12/18/13 08:59 AM
Joined: Mar 2007
Posts: 1,608
Rudolph, Ohio
moparguy7074 Offline
top fuel
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Rudolph, Ohio
Quote:

4:88 gears will probably have to go. I ran a 4:30 gear in my NA Daytona but even that may be to deep for you with the NOS.



For 1/8 mile racing?
Re: loose 750lb et change? [Re: moparguy7074] #1549686
12/18/13 10:34 AM 12/18/13 10:34 AM
Joined: Feb 2005
Posts: 20,180
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

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Posts: 20,180
PA.
Quote:

Quote:

4:88 gears will probably have to go. I ran a 4:30 gear in my NA Daytona but even that may be to deep for you with the NOS.



For 1/8 mile racing?



If he's locking himself into 1/8 mile he may be fine but from the little I read on power-adders they head for a higher gear for some reason. I would guess to soften the hit and let her eat.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time
Re: loose 750lb et change? [Re: pittsburghracer] #1549687
12/18/13 06:06 PM 12/18/13 06:06 PM
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
J
jamesc Offline
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jamesc  Offline
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communist bloc of new jersey
if you stage that car @ 3000# which might be on the heavy side depending on things and it works decent it should run low 9s and high 5s (5.80ish) or maybe even crack 5.70s as mentioned

in a race car weight is king, if you don't need it get rid of it.

personally depending on what you're doing and what you want i would be seriously considering a glide
Re: loose 750lb et change? [Re: jamesc] #1549688
12/18/13 09:22 PM 12/18/13 09:22 PM
Joined: Jan 2003
Posts: 9,116
Falconer, NY
KatFysh Offline
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KatFysh  Offline
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Falconer, NY
isn't the "rule of thumb" 100lbs= 1/10 of a second? You are changing to a totally new ride though. You may be starting from scratch..


When you decide to quit, THAT is the moment when you would've succeeded..
Re: loose 750lb et change? [Re: KatFysh] #1549689
12/18/13 09:33 PM 12/18/13 09:33 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Quote:

isn't the "rule of thumb" 100lbs= 1/10 of a second? You are changing to a totally new ride though. You may be starting from scratch..



In a slower car thats true... but faster you get it takes
more power... in his case starting with 2100# and
add 700# then the driver thats 3000# or better so
in the end it COULD be a 9.0 car
But the car looks good

Re: loose 750lb et change? [Re: 71RTC] #1549690
12/18/13 10:02 PM 12/18/13 10:02 PM
Joined: Nov 2005
Posts: 656
Kokomo, IN
540dust Offline
mopar
540dust  Offline
mopar

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Kokomo, IN
100 - 110 lbs per tenth in the quarter would equate to 5.93-6.08 et in the eighth mile. That's my guess.
Re: loose 750lb et change? [Re: 540dust] #1549691
12/18/13 11:15 PM 12/18/13 11:15 PM
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
Eric Offline
top fuel
Eric  Offline
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Pittsburgh PA
Went 6.70's in my Duster at 3250#....bought the Arrow at 2300# with a similar motor I went 6.00. Now with some more power (approx. 675-700hp) I have been 5.62. If you are really making 750 I would think the car should run in the 5.90 range at 3000#

5.53 @ 125 1/8th on the launch control..more left in her!

Re: loose 750lb et change? [Re: Eric] #1549692
12/19/13 01:04 AM 12/19/13 01:04 AM
Joined: Mar 2008
Posts: 62
middle tennessee
7
71RTC Offline OP
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71RTC  Offline OP
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middle tennessee
thanks for the input, I was thinking about the same (5.80,.90), just checking! hoping for low 5s on the hit

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