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72 Nova rear suspension followup

 
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Mon Feb 03, 2003 8:45 pm    Post subject: 72 Nova rear suspension followup Reply with quote

Just some followup information. In the previous post the last thing I was going to try was a Turbo 400 instead of a 200R4 for a different low gear to try to soften up the launch on nitrous. Just like everybody else I was concerned about all of the rumours about the horsepower that a 400 eats. I only changed the transmission and converter and kept everything else the same. Converters are both 10" and very close to the same stall. The 400 is a TCI street fighter and is slightly tighter than the one I had in the 200R4. Yesterday was the first race of the year at Orangeburg and here are the results. Beast motor time with 200R4 was 1.62, 7.61 at 91.75. Best nitrous time was 1.53, 6.98 at 99.83. First pass with 400 was 1.74, 7.73 at 93.03. I hit the rev limiter because the 400 has a delay of about 500 rpm from the time you hit the shifter until it actually shifts only on the 1-2 shift. (Have to work on this) Next pass was 1.70, 7.64 at 93.27 and third pass was 1.68, 7.56 at 93.86. I was really happy with this. Track wasn't in very good shape and didn't really expect a lot on gas. (There were spots of bare concrete at starting line where rubber was peeled up) Shot 150 from home and only got a 1.64, 7.21 at 100.10. (First time to break 100 Smile ) It was still spinning really bad. 400 definately softened launch some, but will have to try again after the track gets better. I made a delay timer to delay the nitrous a few tenths of a second but ran out of nitrous on the next pass. Crying or Very sad Oops, knew I forgot something. Anyway I guess it was a good learning experience because the 400 actually went faster than the 200R4.
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SMOKEmUP
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Joined: 30 May 2002
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65175.84 points


1979 Chevrolet Camaro

PostPosted: Mon Feb 03, 2003 11:22 pm    Post subject: Reply with quote

How many gears are you using?
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clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Feb 04, 2003 7:03 am    Post subject: Reply with quote

Get into high gear in the 400 about 100' before the lights, which I guess would be called third in the 200. Rpm similiar through the traps in both transmissions.
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heavychevys
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Joined: 18 Nov 2002
Posts: 81
Location: South Carolina
754.46 points


1964 Chevrolet Belair

PostPosted: Tue Feb 04, 2003 11:50 am    Post subject: Reply with quote

Clay,that is pretty good Very Happy You said you raced at Orangeburg.Is this Orangeburg,SC?
_________________
1964 Impala 468BBC 6.986 @ 98.69 MPH 1/8 mi

(Bothers) 69 Nova 408 BBC 6.94 @ 96 MPH
96 F250 4X4 PSD 8.24 @ 84 MPH @ 7000 lbs

www.musc.us/drag
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clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Feb 04, 2003 7:22 pm    Post subject: Reply with quote

Yes. I see you are from South Carolina, where do you race? I mostly go to Orangeburg because it is close, but do go to Cooper River occasionally. Haven't tried Elgin yet, but probably will soon. A friend took some digital pictures of my car, but I don't know exactly to add them to a reply or put them under my name in the left hand side of the page.[/img][/url]
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3172

65175.84 points


1979 Chevrolet Camaro

PostPosted: Tue Feb 04, 2003 10:19 pm    Post subject: Reply with quote

clay... if you have a digital picture of your car you need to make a thumbnail of the image (make the picture smaller). The picture can't be bigger than 125 x 125 pixels wide, don't forget to save it in jpg file format. After you log in here click on profile on the top nav bar, scroll down to the bottom click the browse button "Upload Avatar from your machine" and select the thumbnail file you just created.
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heavychevys
Member


Joined: 18 Nov 2002
Posts: 81
Location: South Carolina
754.46 points


1964 Chevrolet Belair

PostPosted: Thu Feb 06, 2003 11:15 am    Post subject: Reply with quote

Clay,I mostly race at Cooper River now.I did race a lot at Florence Darlington when Tom still had it open.Heard rummer it might get reopened.Also.raced at Carolina,Big Darlington,The Rock and Orangeburg.Grieleville,wrong spelling,is another track I go to.I didn't know Elgin was still open?Do you ever go to Greer?
_________________
1964 Impala 468BBC 6.986 @ 98.69 MPH 1/8 mi

(Bothers) 69 Nova 408 BBC 6.94 @ 96 MPH
96 F250 4X4 PSD 8.24 @ 84 MPH @ 7000 lbs

www.musc.us/drag
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clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Fri Feb 07, 2003 4:58 pm    Post subject: Reply with quote

There was an article in the state paper at the end of November about Elgin is the only way I knew about it. They said to call (803)438-5995 for more info. Rode the bike up there one Sunday morning and it looks o.k. from the gate. About 1/2 mile of dirt road to get there from the main street side is the only thing not so good. I didn't know about Greer, is it a 1/4 or 1/8th? If they have a website, let me know, we might have to check it out. When I get the bugs ironed out, I'll probably go to Darlington. It's a little closer than Jackson. I am planning to go back to Orangeburg next Sunday (16th). Checked out your movie clips, your car looks good and looks like a fun ride, mine is still in the drivetrain development stage. Paint will still be a while on mine.

Later,
Clay
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SMOKEmUP
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Joined: 30 May 2002
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65175.84 points


1979 Chevrolet Camaro

PostPosted: Sat Feb 08, 2003 12:07 pm    Post subject: Reply with quote

You guys are lucky for all the dragstrips you can go to. Up here in the northeast we have a choice of two.
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heavychevys
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Joined: 18 Nov 2002
Posts: 81
Location: South Carolina
754.46 points


1964 Chevrolet Belair

PostPosted: Mon Feb 10, 2003 8:43 pm    Post subject: Reply with quote

I didn't know Orangeburg stayed open all season?Cool!I don't know if Greer has a web site or anything.I beleive it is 1/8?What part of S.C. are you in then?I am in Moncks Corner.

smokemup,that sucks Razz That's how it was in Michigan.Had to drive 2 hrs to get to the track.Then 4hrs to the other one.

_________________
1964 Impala 468BBC 6.986 @ 98.69 MPH 1/8 mi

(Bothers) 69 Nova 408 BBC 6.94 @ 96 MPH
96 F250 4X4 PSD 8.24 @ 84 MPH @ 7000 lbs

www.musc.us/drag
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clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Feb 11, 2003 6:04 am    Post subject: Reply with quote

Well not quite all season. They closed down in the middle of December and opened back up the 2nd of February. I live in a town called Sandy Run. It is about 10 miles on the Columbia side of St. Matthews down Hwy 176. Weather isn't looking good for this Sunday, have to wait and see I guess. This time I'm going to try a slight nitrous delay and 200 lbs. in the trunk which should put weight distribution at 50-50 but will put car weight at about 3850.

I feel for you smokemup, that does stink. Not only do you not have many tracks, but you probably get really shut down for the winter. Still working on the picture.
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3172

65175.84 points


1979 Chevrolet Camaro

PostPosted: Tue Feb 11, 2003 9:16 am    Post subject: Reply with quote

Yeah it does suck. But it makes you appreciate it more when you do go to the track. The real kick in the stones is when you do go to the track and get one or two runs in. Sad .

OK...I'm done complaining.
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Sun Mar 09, 2003 6:45 pm    Post subject: Rear Suspension Reply with quote

Went back to the track and added 160 lbs. in trunk. Car hooked pretty decent and went a 1.53 60' 6.97 at 101.46. Added ballast put weight at about 3780. Ouch. Anyway, this is a tip for anybody running a car with slicks. After this pass, later on in the week was going to check and adjust pinion angle. Noticed it was excessively postive (4 degrees). Also noticed the passenger side spring was kinda warped up and that side of the car was sitting low. Found out it had ripped all of the factory rosette welds loose and spun the center section on the axle tubes. Didn't think I had to worry about this in a footbrake car. Oh well, ain't drag racing fun.
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heavychevys
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Joined: 18 Nov 2002
Posts: 81
Location: South Carolina
754.46 points


1964 Chevrolet Belair

PostPosted: Mon Mar 10, 2003 5:21 pm    Post subject: Reply with quote

Clay,that is a awesome time you ran Very Happy .I should have my brothers 69 Nova out pretty soon.I hope for it to go 6.80's on the gas but I'll see.I changed the heads on my Impala so it should go faster also.Great times you again Very Happy
_________________
1964 Impala 468BBC 6.986 @ 98.69 MPH 1/8 mi

(Bothers) 69 Nova 408 BBC 6.94 @ 96 MPH
96 F250 4X4 PSD 8.24 @ 84 MPH @ 7000 lbs

www.musc.us/drag
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