95' Junker Drag Truck

Big Blue24 said:
The Moog 7390's I installed are for a Ram 2500 V8 or 1500 V8 Extended Cab 155" 6400 GVW. I was afraid the 1500 V6 springs would be too small for the heavy diesel. Lesson learned, if I were to spend $80 on another set of springs, I would definitely go with a lighter duty spring such as the Moog CC792 for Ram 1500 Standard Cab 135" 6400 GVW, or even lighter duty RAYBESTOS Part # 5871121 Inside Diameter=4.87" Wire Diameter=.781" Free Height=13.44" Driver Side/13.16" Pass.



By the way, the track is open tonight!!!! Weather looks good, and the Junker is ready to try out the new springs!!!
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Where did you get them for 80 bucks?

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madmikeismad said:
Where did you get them for 80 bucks?

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I bought them from an online vendor like Ebay or Amazon. I think I paid $76 shipped or something like that.

RockAuto.com has a large selection of coil springs, the pricing looks good, just unsure how much you'd have to pay in freight.
 
YOUNG GUNS15 said:
Alright! lets bust into the 11's!!
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Spence, I wish it had a chance to break into the 11's......

Street Legal night, cold track, lots of beater cars dripping oil everywhere.....

Not even a remote chance that it'll break into the 11's.

With a 2.1 60' time (good for street tires on this truck) it would have to run 127 MPH to scratch out an 11.95.

127 MPH in my "street trim" setup of 5500 lbs equates to roughly 760 average HP throughout the run. I'm confident this truck doesn't make that much power.
 
Big Blue24 said:
The Moog 7390's I installed are for a Ram 2500 V8 or 1500 V8 Extended Cab 155" 6400 GVW. I was afraid the 1500 V6 springs would be too small for the heavy diesel. Lesson learned, if I were to spend $80 on another set of springs, I would definitely go with a lighter duty spring such as the Moog CC792 for Ram 1500 Standard Cab 135" 6400 GVW, or even lighter duty RAYBESTOS Part # 5871121 Inside Diameter=4.87" Wire Diameter=.781" Free Height=13.44" Driver Side/13.16" Pass.



By the way, the track is open tonight!!!! Weather looks good, and the Junker is ready to try out the new springs!!!
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Thanks for the part #'s. Do you think the lighter springs would help with the ride?
 
Big Blue24 said:
I bought them from an online vendor like Ebay or Amazon. I think I paid $76 shipped or something like that.

RockAuto.com has a large selection of coil springs, the pricing looks good, just unsure how much you'd have to pay in freight.
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Rockauto is out of stock on all the raybestos, and the moogs are over 100. Can find any on ebay that look trustworthy either lol.

Also, the ones I can find are way less than the stock 16in loaded. Im looking for only 14 or 15in loaded LOL

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I got out the moog book at oreillys, you can compare height vs rate and coil diameter etc installed loaded etc.
Gm b body cars use the same size spring, just less rate (lb/inch)
The lower the rate the more comfortable of a ride, if it's free height is enough to support the front end of the truck while compressed, (lb/inch again)
But there is literally 500 different springs in that book, it will also give you original application so you can junk yard it.
 
I made 9 passes at the track last night. I was having major traction problems:

1st pass 13.89 @ 116.27 MPH I swear it I lifted 4 times during the pass trying to maintain traction.

[ame="http://www.youtube.com/watch?v=Szqs-wp2p3Y"]http://www.youtube.com/watch?v=Szqs-wp2p3Y[/ame]

Second pass I did a longer burnout to get the tires warm and left with a little bit of boost. I still had to lift after the 1-2 and 2-3 shift to regain traction but it didn't seem to spin on the 3-4 shift and ran much better overall: 12.80 @ 117.5 MPH It was a nice kill on a newer Mustang.

The third pass is also shown, it had a lot more lifting due to traction issues.
Timeslip210121280.jpg


[ame="http://www.youtube.com/watch?v=GWzMSUyrz2g"]http://www.youtube.com/watch?v=GWzMSUyrz2g[/ame]



As the night progressed, I played with the traction bar pre-load and dropped rear tire pressure to 21 psi. I managed to cut a personal best 60' time for street tires 2.002!. I left kind of soft and it didn't start to spin till about 65-70' out, hence the great 60' time and marginal ET/MPH of 12.77 @ 116.

Timeslip21012127720.jpg


Finally I tried adding a passenger for more weight. This did the trick and ran the lowest ET of night:

12.530 @ 118.25 MPH

Timeslip210121253.jpg


I then made another couple of passes in the 12.7's with a passenger and even got an in-cab video to show what the ride's like.

Timeslip210121271.jpg



12.71 @ 118.5 In-Cab Video
[ame="http://www.youtube.com/watch?v=86u-SxMUc0c"]http://www.youtube.com/watch?v=86u-SxMUc0c[/ame]

And finally, I made a solo pass with the camera pinned against the steering wheel with my left hand to show how much steering input it takes to keep the Junker driving straight down the drag strip along with how much the tires chirp and spin on the gear shifts. ***Warning very shaky video***

[ame="http://www.youtube.com/watch?v=-LWr35z6uSw"]http://www.youtube.com/watch?v=-LWr35z6uSw[/ame]


Anyway, I scaled the truck with me and my passenger and it came in at 5670 lbs. Combine that with 118.5 MPH trap speed and my new average rear wheel horsepower total comes out to 640! My best prior to racking the pump barrels was 580 HP so that shows a solid 60 RWHP gain from racking the barrels. Another key thing to note is that since I was having so much trouble hooking up in the first part of the track, I was only able to get a best 1/8th MPH of 92.6 with a passenger. This truck is very capable of 95 MPH in the 1/8th so I feel that the 640 RWHP estimate is conservative.

After cutting (2) 2.0 60' times on such a slick track, I'm convinced that the front spring traction modifications were beneficial.
 
Maybe the wieght of the passenger hung in the back bumper would help alot. Have you thought about getting the rearend down some so it can tranfer wieght better. We flipped the front hanger and put longer shackles on a shortbed lowered it about 5 inches. I bet the hook would change a bunch. Free also. Right up your alley.

What size exhaust housing you running on the big turbo, without going threw pages of stuff I was thinking it's a 26. I found one of those turbos, thinking about building a set of twins with it and swapping the ht60 out this summer.
 
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gwhammy said:
Maybe the wieght of the passenger hung in the back bumper would help alot. Have you thought about getting the rearend down some so it can tranfer wieght better. We flipped the front hanger and put longer shackles on a shortbed lowered it about 5 inches. I bet the hook would change a bunch. Free also. Right up your alley.

What size exhaust housing you running on the big turbo, without going threw pages of stuff I was thinking it's a 26. I found one of those turbos, thinking about building a set of twins with it and swapping the ht60 out this summer.
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The exhaust housing on the HT4B is 28 cm.

As far as rear ride height, it is a little too high with the 33" mud tires. With the 27" Nascar slicks, it's about perfect. I plan to test out the 29.5" ET Drag Slicks next time, so I'll probably have to see how the ride height looks and go from there. I think you're right, it's probably still too high in the rear with anything but the 27" slicks.
 
I'm loving the progress you have been making.

I think the right rubber under it would be the best thing you could possibly do at this point. It runs good but getting out of the hole is tough.

I've been shopping for slicks and new rims...just can't get that price tag past the wife. LOL
 
i have some 34 inch tall and damn near 15-16 wide for a 16 inch wheel in tha garage. they were on the dually when i bought it, supposed to have very few passes on them. ill take 200 for them if someone wants to pick them up!
 
Ha ha, those timeslips look like mine!

rb-track.jpg


I thought Vegas hooked better than that....you need to get to a test and tune. And some real tires ;)
 
I have a set of Mickey Thompson ET Drag 29.5 x 11.5 x 15 slicks and 15x10 8-lug steel wheels sitting in my garage ready to be mounted. Last night was street-legal night and they only allow DOT tires. Plus the fact that there is no track prep, no VHT, 100+ street cars dripping oil, sand, and gravel all over the track, even guys with cheater slicks had a difficult time getting traction. If you watch closely on the 13.89 ET video, at the end of the burnout sparks fly, probably due to gravel or some other foreign debris in the water box.

At the NHRDA race in March, I'll be running slicks and hopefully I'll have enough traction and power to run competitively in the 11.90 index class.
 
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Cool, good luck! I'd love to see an 1.7 or 1.8 60ft ;) I know you would too....
 
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