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{poll?}--et guess from you guys

 
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hemistudegasser
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Joined: 22 Apr 2004
Posts: 10
Location: Latham,NY
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PostPosted: Thu Apr 22, 2004 9:24 pm    Post subject: {poll?}--et guess from you guys Reply with quote

hi,this my first day on the board. i am fairly new to racing,have a ton to learn. i was wondering what your guesstimates for my et would be with new gears[[4:56's]]??? my car is a 41 studebaker champion coupe 60's gasser style,drilled econoline straight axle,leaf spring rear w/36" ladder bars, it is a street/strip car. just finished it in the middle of last summer, engine is a fairly mild 426 hemi, 10:1, stage v aluminum heads, 850 aed single 4 top an indy spider intake,.572 solid cam. manual valve body th400 w/ 9inch 4500 convertor,rear is 9" ford,full spool 35 spline w/3:89 gears---putting 4:56 in in a few weeks,the gears should really make the car come alive i hope. best run last year was 11.96 @110.5 mph, problem is i'm only going through the traps at 5000 rpm w/ the 3:89 gears using 30" m/t et streets. car has no electronics,only line lock and msd box w/over rev chip so i dont cook the motor. my clubs site is www.eastcoastgassers.com has our cars,rules,schedule etc.

best et-11.96 @ 110.5 mph
best 1/8th--7.45
best 60ft.--1.63

best et w/4:56's???

thanks guys, scott
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2x4
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Joined: 25 May 2003
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PostPosted: Fri Apr 23, 2004 10:21 am    Post subject: Reply with quote

Welcome! I love the old school gasser cars!
I know nothing about Hemi's (unfortunately!) so I'll just throw out a guess of 11.70.

It looks to me like the mph is down quite a bit for those times, sure your not running out camshaft? Just judging by how last year I was stuck at 12.80 but the mph was 108. Granted I was spinning like mad. That thing must be hooking something fierce (1.63 60'). Like I said, I'm Hemi impared, so its very possible I dont have a clue what I'm takling about Wink

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osmiumfoot
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PostPosted: Fri Apr 23, 2004 12:48 pm    Post subject: Reply with quote

What are your current shift points?
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hemistudegasser
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Joined: 22 Apr 2004
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Location: Latham,NY
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PostPosted: Fri Apr 23, 2004 3:12 pm    Post subject: Reply with quote

thanks for the responses. it hooks real good i think for not even using slicks,we only leave at about 1500. the cam is enough im sure,errr i hope,lol. the cam makes its power from 3500-7100. i'm shifting @6200 , with the 3;90's in once we are in the early/middle of third 3rd gear it just stays pretty flat i'm think it has to be the gears. i'd take 11.70 but i think it will do much better, the hemis are known to keep pulling. my novice guess would be 11.40/50's.
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ABIGBRAIN
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Joined: 22 Jun 2003
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Location: Upstate New York
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1968 Chevrolet Chevelle

PostPosted: Fri Apr 23, 2004 5:35 pm    Post subject: Reply with quote

Is this a trick question? NEVER knew a hemi to be "mild" 7100 RPM cam, but shifting at 6200? Street tires??? w/ 1.6 60 FT? are you kidding us? I can't make a prediction on this one. I pleed the 5th lol
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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Fri Apr 23, 2004 5:41 pm    Post subject: Reply with quote

ABIGBRAIN wrote:
Is this a trick question? NEVER knew a hemi to be "mild" 7100 RPM cam, but shifting at 6200? Street tires??? w/ 1.6 60 FT? are you kidding us? I can't make a prediction on this one. I pleed the 5th lol

Like everything else. It's all relative.
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hemistudegasser
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Joined: 22 Apr 2004
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Location: Latham,NY
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PostPosted: Fri Apr 23, 2004 6:07 pm    Post subject: Reply with quote

maybe i should of clarified "mild",lol. the stock hemis of the 60's were 12.5 comp. monsters w/dual quads and a lot of guys today are going the 500+ stroker/crate hemis. lets just call mine compressionally challenged Very Happy . but im dead serious those are my best times,i'll even post the timeslips. i wanted a big cam and solid(love how they sound) as far as the shift points ,doin 6200 b'cuz it sounds like its really screaming then (have custom made fenderwell headers,3 1/2" collectors) dumping out right b4 the door and i have sooooo much $ tied up in this car i would rather start off easy. im younger,30, and very new into racing, so im just trying to learn as much as i can.
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MaxRaceSoftware
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Joined: 05 Feb 2004
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PostPosted: Fri Apr 23, 2004 8:27 pm    Post subject: Reply with quote

60= 1.6300 39.7049
330= 4.7951 73.9615
660= 7.4500 90.0655
1000= 9.9154 100.9617
1320= 11.9600 111.3475

0 to 30 mph= 0.997
0 to 60 mph= 3.326
0 to 80 mph= 5.266
0 to 100 mph= 9.742
0 to 120 mph= 12.763

Ft ET MPH
-1 -.2311 0.0000
0 0.0000 5.8995 1.1635

looks like you leaving at between 1.1635 and 1.1922 GForce


the "ideal" acceleration rate for a 11.96 ET run would be ;
60= 1.6139 39.9099
330= 4.7951 72.7347
660= 7.5271 89.4922
1000= 9.9154 102.6666
1320= 11.9600 109.7413
so you are very close at 60 Ft
a little faster at 660 Ft
again accelerating very well at 1320 Ft where your 110.5 MPH beats
the ideal MPH of 109.7413 for a 11.96 ET

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Mopar_O_Nocar
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Joined: 18 Apr 2004
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Location: WA
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PostPosted: Sat Apr 24, 2004 12:19 am    Post subject: Reply with quote

The Hemi's were designed for Nascar and are designed for VERY high RPM'S. I'd say shift at 6500-6600 RPM's and w/ your gears you should be in the sub 11.50's. Just my .02.

What's your Exhaust? Size of header? Tubes? Sorry if I missed it before, can't think very good right now. I'm sure you have plenty of cam.

Look at the picture, read the specs. This was where Mopar was heading before the emissions restrictions and the end of the Muscle Car Era.

Michael

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hemistudegasser
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Joined: 22 Apr 2004
Posts: 10
Location: Latham,NY
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PostPosted: Sat Apr 24, 2004 12:54 am    Post subject: headers Reply with quote

thanks for the pic mopar, i am going by memory her but my headers are 38 inches long, i believe 1 7/8 tubes going into 3 1/2" collectors. i have always run the car with open headers but the exhaust is 3" exhaust going into 3" two chamber flow masters that exit right in front of the back tires. ill try attaching a pic but i am not sure if it will work. scott
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pro60chevy
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Joined: 01 Jan 2004
Posts: 406

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PostPosted: Sat Apr 24, 2004 6:31 am    Post subject: Reply with quote

Hey Scott, How long have you been a member of the East Coast Gassers. I was thinking of joining that group, but my car has a few issues with some of the rules. I'm like a lost soul, looking for a group to race with. My first pass with this car has yet to happen, so I have no idea what to expect other than having no trouble with the 12.50 time requirement.
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