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Nice, 6-7% slip allowing for a bit of tire growth, that's what I am looking for.

Sounds pretty good, what is your trap RPM and MPH, and what size tire?

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Outstanding, very impressive.

Thanks for the replies, great to get first hand experiences and results 0.4 is outstanding. Jim, how did it effect your trap RPM? What was the cost? Gunner, with my set up the 11" will flash to 3200 stock stroke 4.10 gear 3860lbs. here's a clip of a launch I'm at 17.33 NOSTALGIA DRAGS 2024 -...

Looking to drop my ET, the first half of the run is a little off, I am currently using a B&M holeshot 2400 that flashes to 3200 behind my 448ci 440. Car and driver go 3860lbs. Currently running around 11.3 120mph with a best of 11.27 @ 121mph. Like to drop my ET into the 11.0 range. I hear all...

Sounds fair to me.

Yes, using the extensions in place of the exhaust saves around 55lbs. I have 2.5" pipes to turbo mufflers and dropping the exhaust I pick up 5-6 mph.

Here's my stock stroke build - 448/727-11" converter/8.75-4.10. SRP's in at zero deck, K1 H beams, 84cc eddy's - stock valve job with backcut intakes, I opened up the runners to 218cc's and skinnyd the bosses.. XE282S/1.6 mancini arms. Eddy RPM intake- port match, 850 quick fuel DP, 1 7/8"...

Wow, that's light, I'm at around 3610lbs (3860lbs with me at the track) with aluminium heads and just header extensions in my 71 R/T. What have you done for weight reduction?

OK, thanks for the advice, I'm not overly worried. It does give a couple of revolutions on the wheel depending on the track temp and prep, but mostly it hooks up, It is likely I could get away with a tighter rebound. Would having the lighter T bars allow for a tighter rear?

I set it up at 3 1/2, I have not re-measured since I have had a few runs at the track to see if anything has changed. It has a slight vibration at around 30 mph since I added a 3 degree shim to bring it down to the 3 1/2. No vibration at the track to 120mph though.

There are a few variables, not the least as said with cam events but also elevation, engine temp, quench, even weight of car comes into it etc. But 10:1 with a cranking compression of 165psi at sea level 35 degrees total timing and 180 degree temps is safe with a quench motor - presuming 84cc...

I am concerned about the pinion rise and the angle it may be exerting on the universal. I am unsure of what is going on under the car, that is why I fitted the camera. From what I have seen of other mopars at my track they don't seem to get that amount of rise but I am unsure of their set ups...

I am concerned about the amount of rear rise in the car as to how it is effecting the pinion angle, I did fit a camera under the car but I didn't have it set up correct to record. Stock XHD springs with one extra leaf, front clamped, one clamp on the rear, pinion snubber. I have DA shocks, I...

Yep, it should do, I recon the car has the balls to sneak into the 16 second zone under the right conditions though.

You wont get a lot of separation without traction, the car needs to hook up fairly well to load the suspension. It's a case of trying what works but if you have a prepped track I would be starting with a tighter rebound (12-14) on the rear and if it breaks free loosen it up a couple of clicks...

I think you have potential to run a lot quicker, you have better flowing heads than I do. I have a similar combo and was running about what you are. I swapped out my street tires and 3.23's for drag radials and a 4.10 gear, went to a 1.6 ratio arm, DA shocks on 4 corners and a little head work...

Yep, can be hard on the trans if your in 1st, I use the original valve body but with a TF2 shift kit minus the high gear restrictor as I run 15 springs in the high gear clutch. The valve body has low band apply and I fitted a 16 roller 6 bolt sprag and billet front drum. I start in first (no...

Yes, was running 12.3's with a 1.95 60ft, the last run I let the tires heat up more so that it dragged the engine down on the burn out. Just getting a feel for the car at the moment.