will doing these things help in ET ?

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will doing these things help in ET ?

Post  whitefield on January 16th 2018, 1:39 pm

I have made multiple post about my 8000 rpm 408W , vehicle 3000lbs, with 235lbs driver ,4.10 gear, drag radial 275/60/15, 5000 stall ,950 carb, 1 7/8 primary long tube headers 1.36 60ft , 6.30ET 1/8@109 mph.

Repairing valve spring issues. (valve float)
Locking out distributor.
Going to a 1000cfm carb.
2'' primary long tube headers. Thanks Whitefield

Adding more info !

C4 transmission
Cam is solid roller Vic jr intake 205 AFR heads
276 intake 284 exhaust duration @ .050
Installed on a 103 lobe seperation lift I will add later
Pretty much all of my passes from 6.39 to 6.30 were 1.36 60 ft
10 way adjustable struts and shocks
Coil overs in front  tubular k member and control arms.
Anti roll bar in rear with (new) stock GT replacement rear springs
Solid rear bushings with double adjustable upper and lower control arms
6 point cage  through the floor frame connectors ,returnable fuel system , 16 Gal fuel cell


Last edited by whitefield on January 17th 2018, 11:53 pm; edited 2 times in total
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Re: will doing these things help in ET ?

Post  pmrphil on January 16th 2018, 2:50 pm

Have you had this on a chassis dyno to confirm that you need to spin it that high and still make power? I do a lot of Windsors and rarely see the need for that kind of RPM. Just asking, you may find it might not make as much upstairs as you want, less RPM may also get rid of valve float issues.

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Re: will doing these things help in ET ?

Post  whitefield on January 16th 2018, 3:39 pm

pmrphil wrote:Have you had this on a chassis dyno to confirm that you need to spin it that high and still make power? I do a lot of Windsors and rarely see the need for that kind of RPM. Just asking, you may find it might not make as much upstairs as you want, less RPM may also get rid of valve float issues.

7000 rpm got me 6.39
7500 rpm got me 6.36
8000 rpm got me 6.30
I did not want to twist it past 8000 I really just wanted 7000 rpm but kept going up 500 rpm at a time and it kept getting faster.!

no dyno just track times at the same track all season long.

Thanks for the insight .
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Re: will doing these things help in ET ?

Post  pmrphil on January 16th 2018, 3:45 pm

I'm not saying anything is impossible, but air conditions and/or traction could account for the ET difference. Some time spent on the dyno will give very good info as to HP range, torque range, and best ignition timing, not to mention carb jetting. And it costs about the same as you would spend going to and from the track, plus entry.

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Re: will doing these things help in ET ?

Post  whitefield on January 16th 2018, 4:18 pm

We will try to do that this season. Trying to be more competitive with the list racing I do . Thanks Whitefield
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Re: will doing these things help in ET ?

Post  rmcomprandy on January 16th 2018, 7:43 pm

whitefield wrote:We will try to do that this season. Trying to be more competitive with the list racing I do . Thanks Whitefield

If the lengths of the primary tubes are correct along with the correct size and length collectors ... larger header primary tubes will just hurt your performance.
I don't think it is the peak RPM making the difference but, power or converter lock-up at the lowest RPM shift change.

Use a good "crank" triggered ignition.

Different intake manifold and carb combinations may help.

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Re: will doing these things help in ET ?

Post  Roger Dyess on January 16th 2018, 10:32 pm

I found that at the ETs that your talking about,with the gear you have you are at about the max. that you can expect with a hydraulic cam. At least it sounds like my hydraulic cam problems. If your running a C-4 with a 5000 stall and a 410 gear, the stall may be a little to high . We used a 4500 stall . Your converter guy should be able to help u with the description of the car that you posted and add the gearing of the transmission. Get the set up correct. I. Agree with Dyno recommendation. Borrow some carbs if possible and Dyno them. For your set up I personally think that 1000 cfm is to much.
I had my best luck with a 900 which started life as a 750 on a victor jr intake . Phone calls to a carb builder are free and helpful. Be careful with the header tube size....to big and your other efforts are wasted. You can have lots of horsepower, without being able to put it to the ground it's money wasted.
Didn't notice any discussion on your chassis . What's that rear end set up. You could get to 1.30-1.32 if it's leaf spring? Leave RPM ? As was mentioned before you want to be leaving at the correct RPM with the correct stall and first gear and shift point ,glide or C4.
What shocks are you running? Are you pulling the front tires?
I'm not an expert like others in this group. I spent a few bucks getting the little knowledge I have ...LOL!!! Sorry for the long message. If you covered all of this then can the message please.

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Re: will doing these things help in ET ?

Post  jbozzelle on January 17th 2018, 1:10 pm

I'd try a lower (numerical) gear. I've always preferred my engines to have to work for it. Maybe a 3.90 or a 3.73 and see what it does?

Sometimes loading an engine produces a more efficient outcome...

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Re: will doing these things help in ET ?

Post  whitefield on January 17th 2018, 11:52 pm

Added some more info .

Thanks for all of the replies. Randy and Jon I will do some testing in couple months when the weather starts getting better . The ones I have money to do .
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Re: will doing these things help in ET ?

Post  Roger Dyess on January 30th 2018, 3:15 am

Please keep us up to date. Right combination is the key.

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Re: will doing these things help in ET ?

Post  whitefield on January 31st 2018, 1:29 pm

Roger Dyess wrote:Please keep us up to date. Right combination is the key.

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I will do sir. I would like to post some pics and videos , but since photo bucket has gotten greedy. I am not sure I know how to get them posted ! lol
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Re: will doing these things help in ET ?

Post  stanger68 on February 1st 2018, 12:28 am

I will do sir. I would like to post some pics and videos , but since photo bucket has gotten greedy. I am not sure I know how to get them posted ! lol[/quote]

http://www.429-460.com/t26481-testing-a-picture-upload#300421

There was another thread that was a little shorter read but I couldn't find it.

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