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Post  51Custom on June 25th 2012, 5:44 am

Hi from New Zealand
Had my first taste of drag racing over Easter and I'm interested in what I can do to the car to possibly get an 11 second E.T.
I've had a look at the sticky on horsepower levels depending on modifications, and I reckon its somewhere between 500 and 575 horspower. A bit vague I guess but theres a lot of variables.
A few details: 466 cubic inch, dove heads 310 and 176 cfm@ .600, 2.07 and 1.71 valves. 11.25 compression. crower cam: 300/310 adv 574/591 lift, forged pistons, H-beam rods, balanced, weiiand stealth with 780 vac sec quickfuel, roller rockers etc.
2800 stall, turbo 400, I used a 3.7:1 ratio 9 inch with a mini spool and 28 inch tyres.
Im gonna use 4.11:1 next time.
Also will post a video of the 12.6 pass soon, because I'm a new member it won't let me post the link
Cheers

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Post  dfree383 on June 25th 2012, 5:49 am

Whats the car and how much does it weigh?

Is it spinning the tires?
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Post  51Custom on June 26th 2012, 3:17 am

ok the car is a 1951 Ford Custom and from factory the car weighs 3188 pounds, probably a bit more with the 460 motor plus driver, maybe allow 3500 pound. I was only using street tyres but the track had been prepped with VHT and was super sticky, so I didn't notice any wheelspin. I had considered a larger carb but don't know if the heads flow enough and the valves aint as big as they could be to gain any advantage.


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Post  dfree383 on June 26th 2012, 3:54 am

Post more about the Engine.

Have you tuned it?
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Post  51Custom on June 26th 2012, 6:32 am

Its a 2 bolt mains block bored 60 thou over. pop up Denco pistons with spirolocks, Eagle H-beam rods, stock crank, bottom end stud kit with windage tray, stock oil pump, stock Motorcraft distributor with MSD6AL- 34 degrees in by 3000 rpm-vacuum advance left off, 3/8th pushrods, guide plates, cam is solid, roller rockers, valve springs and cam followers came as a kit with the cam. the heads have had a 3 angle vavle job and some porting on the exhaust side and the intakes cleaned up. the valves are Ferrea severe duty, headers are 1 7/8th about 34 inches long with a 3 inch collector.
Not sure what other info you may be after, but any help appreciated

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Post  dfree383 on June 26th 2012, 7:51 am

Can you post the full Race Time sheet Specs?

60' times, 1/8 mile times and MPH & 1/4 mile times and MPH?
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Post  51Custom on June 27th 2012, 2:12 am

I've found one of the time slips: 60" 1.946
: 330 5.382
:1/8th 8.193
: mph 87.85
: 1000 10.623
: 1/4 12.681
: 109.71 mph

Lower gear ratios should improve 1/8 mile times, but if you can see something else I can do, I'm keen to try it.
Thanks

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Post  dfree383 on June 27th 2012, 2:44 am

Couple of things I see.

#1 its not making anywhere near 500-575hp, more in the range of 400-450ish and the actual weight with you in it is probably leaning towards 3800-4000ish.

#2 The cams a little big for a heavy car

#3 It needs more convertor (if you want to go fast)

#4 Need's more gear, the 4.11:1 will help, 4.30s are probably better.

#5 The bigger carb will help with more gear and a better convertor.

#6 I'm betting some tuning will get you some ET (timing and carb tuning)

#7 If you get gears and a convertor, your probably going to start having traction issues and will need some drag radials and suspension work at that point.
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Post  51Custom on June 27th 2012, 4:13 am

hey thanks for your input; I based the engines output on what i've read on the sticky on this site about horsepower levels depending on the modifications done to the motor. from what I've read, 400 to 450 seems a bit light but I guess the only way to find out properly is to get it dynoed.What size carb and convertor would you recommend? What do you think of the sticky? The other thing is the car is street driven 95% of the time so the whole thing is a bit of a compromise.


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Post  dfree383 on June 27th 2012, 5:35 am

4.11's, a 10" 3500 and a little bit smaller cam.

A 850 DP or 950hp will also get you some ET.
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Post  51Custom on June 27th 2012, 6:08 am

Ok sounds good,low 12s might be a bit more realistic though, with an 850 dp what jet sizes would be a good base to start? with only a carb change and play with the ignition timing, what horsepower increase would be expected, bearing in mind it would probably make the whole package more efficient?

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Post  quick 52 on June 27th 2012, 6:29 pm

51Custom wrote:Hi from New Zealand
Had my first taste of drag racing over Easter and I'm interested in what I can do to the car to possibly get an 11 second E.T.
I've had a look at the sticky on horsepower levels depending on modifications, and I reckon its somewhere between 500 and 575 horspower. A bit vague I guess but theres a lot of variables.
A few details: 466 cubic inch, dove heads 310 and 176 cfm@ .600, 2.07 and 1.71 valves. 11.25 compression. crower cam: 300/310 adv 574/591 lift, forged pistons, H-beam rods, balanced, weiiand stealth with 780 vac sec quickfuel, roller rockers etc.
2800 stall, turbo 400, I used a 3.7:1 ratio 9 inch with a mini spool and 28 inch tyres.
Im gonna use 4.11:1 next time.
Also will post a video of the 12.6 pass soon, because I'm a new member it won't let me post the link
Cheers
i have a 52 f1 with 480hp it runs 11.50s with a best of 11.43 here my converter and gear tires and suppension 4000 9 1/2" converter 3.89 truetrac posi mickey thompson drag radial 275x60x15 cal trac with S10 leaf springs

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Post  51Custom on June 28th 2012, 2:20 am

Thats pretty quick. how does your engine stack up against mine as far as modifications and carb size etc go? Is it a street driven truck? drfee suggested a bigger stall but 4000 sounds a lot for a street car, is it pretty sluggish under 4000 rpm?

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Post  dfree383 on June 28th 2012, 6:59 am

if its sluggish under 4000 you either need alot more convertor or put a smaller cam in it.
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Post  quick 52 on June 28th 2012, 8:38 am

51Custom wrote:Thats pretty quick. how does your engine stack up against mine as far as modifications and carb size etc go? Is it a street driven truck? drfee suggested a bigger stall but 4000 sounds a lot for a street car, is it pretty sluggish under 4000 rpm?
here's my engine stock block .060 over 472 ci. stock crank,stock rods with arp bolts,kb pistons 22cc dish cast hyper, solid flat tappet cam 258 258 @ .050 .615 .615,ford cj a429 heads, ford victor style intake,stock dist. recurved, 950 proform carb. 1 3/4 header 3" ex. summit turbo muffer the cheap ones. trans. is a 700r4 overdrive 4000 stall with lockup 9" ford 3.89 true trac posi 31 spine moser axles tire MT DR 275x60 x15 s10 leafs and caltracs 9 way rancho shocks. truck weight is 3870 with driver has ran a best of 11.43 at 117mph my 60' are in the 1.5s with a best of 1.51 most are 1.55 to 1.60. the truck is my street rod and i drive it a lot about 3000 miles a summer and take it to the track acouple times a year
12's to 11's DSC05568

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Post  51Custom on June 29th 2012, 8:41 pm

That truck must look awesome cutting those times. Is your horsepower figure dynoed or guesstimated? Either way its obviously a better combo than mine





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Post  quick 52 on June 30th 2012, 10:35 pm

that using wallace racing calulator for 1/4 mile mph you can google it. ive been using it it seem to be real world

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Post  51Custom on July 1st 2012, 5:56 am

Long term I'll have to upgrade to better cylinder heads and look at cam and intake. Its winter over here, next 18th mile drags is in November so will try bigger carb and I may be able to get some 4.40: 1 gears. Dfree when you talk about a smaller cam do you refer to the duration or lift. Quick 52 appears to have less duration but more lift, is this what you mean. Also TFS heads seem to be good value for money, , if you've had anything to do with them which ones would you recommend, bearing in mind I don't really want to build a new set of headers etc.

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Post  dfree383 on July 1st 2012, 7:05 am

Yes shorter duration, You need to bring the torque and HP down in the RPM range where you can use it.

The TFS Street heads are an excellent choice for a heave vehical.
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Post  51Custom on July 3rd 2012, 2:59 am

A vid of me sled at this years Nostalgia drags
https://www.youtube.com/watch?v=euehB2GJ-bU&feature=plcp

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Post  51Custom on July 5th 2012, 2:29 am

finally figured out how to post a video. check out previous post if you want. might check with the guy on this forum who is the cam guru about what grind would work best for my motor

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Post  dfree383 on July 5th 2012, 5:33 am

a Plate system with a progressive controller would be a cheap way to go alot faster at the track and still keep it streetable.
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Post  51Custom on July 5th 2012, 6:45 am

you've completely lost me there mate haha, what are you talking about?

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Post  51Custom on July 5th 2012, 6:47 am

are you talkin bout nitrous?

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Post  dfree383 on July 5th 2012, 7:26 am

51Custom wrote:are you talkin bout nitrous?

Yep..... It will take care of the Convertor being to tight and the cam being to big, without taking anything apart............
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