Wasn't the gains I was hoping but gains are gains. Previous best, 13.53 @ 101.57 with a 1.92 60' and the new best right off the trailer was 13.42 @ 102.03 with a 1.93 60'. After that the times stayed around the 13.58 to 13.53 times except for one back to back run where the times were horrible. The bog I had last time out is gone now which is good but didn't change my 60' much at all, best one was a 1.91. Here's a list of things I've done since the last time.

Locked timing at 36*
Fixed the over-travel on secondary pump arm
Switched to #35 squirter on primary side from a #31
Jetting was 78/83 now is 78/85 but might drop it back to where I had it.
Air temps were higher this time hovering around 95 when I made the first run down to 80 at night compaired to 90 and 75 the last time out.

All in all, another freakin fun night at the drag strip One nervous moment when a 67-68 Camaro was getting sideways in the other lane in front of me Only lost one race that was against a Mustang GT on the bottle running 12.70's. The owner of that was the tech guy who looked at my car lol Says it runs 13.70's on the motor and ran 15.30's when he first got it. Here's a video from tonight that shows him and another GT. Yes I fooked up staging the car in the first run.Click here

 

What elevation is that track at? from the list of mods in your signature I would think you should be in the 12s. I also think you would be faster with 4.10s.

 

Got a little cocky there with the video editing huh (about beating the Mustang, lol) JK...

Nice runs, and I should have some in car videos next weekend if all goes well., but doubt id be able to post them on here!

 

Hehe well, one beat me so I had to beat a different one All in good fun.

84firebird383, I know this thing should be running better but so far I don't know why it's not. I'm probably going to change the exhaust to see if that helps any. It just sucks having put so much freakin money into this it's not performing that great. Oh and the track is at 500 feet.

 

Try bumping the timing to 38. Aluminum heads can normally take another 2 degrees. I have no experience with the spintech muffler but on my single 3 in system i picked up 2.5 mph going from flowmaster to a dynomax bullet. This wednesday I'm trying duals. Hopefully i will pick up even more. Also you could be starving for fuel at the top end. I really think your combination has the ability to hit 110 mph.

 

Next time out I'll try bumping up the timing. The spintech I'm running is their race muffler and flows really good but, my exhaust isn't mandral bent so it probably gets squeezed down to 2.5 in areas It was fine for the 305 but not this engine. Might be slapping on an 850 to see what changes that makes too.

 

You have a similar combo to my old 83Z. Never got past 13.5 @ 102. AFR 190 heads, comp 236 flat tappet cam, 10:1 comp, weiand intake, 3310 carb, 4.10's, 3000 stall, slicks. My problem was tuning and combo.

My headers were way too small, they were either 1 1/2 or 1/5/8 shorty's, can't remember right now. The exhaust was some crappy local shop made with like 2 1/4 pipes.

Try some hooker 2210 headers and run dual 3" pipes back to 2 mufflers and see if that helps. I got rid of that car, and it still haunts me to this day that I never figured out what was wrong.

 

Might give those headers a shot. Just going to be a pain in the **** to do exhaust with the Spohn crossmember. That thing is so huge and in the way I might end up having one made at a friend's fab shop.

 

Nice run , not bad at all.You have the same cam i have in my car(294s).My personal best was 12.73@107.Do u run open header?
if not u could try that.I also have a currie 9 inch rearend but with only 4.11 gears.How much gain did u get by going to 4.56 gear???because im thinking of going to 4.56 or maybe 4.88 .

 

Unless you have very tall tires,shift well over 7000 rpm , or only race 1/8 mile you will most likey go slower with those gears. I went from 4.10 to 4.56 in my old car and lost 1 tenth and 1 mph. I had 28" tires and shifted at 7200 rpm. The motor was a 350 with ported dart II heads and a big solid cam.

 

I had my motor dynod it reaches peak hp at 6600 rpms.I cross the finish line at about 5800ish rpms.

 

If you want to pm me with your dyno results from the beginning rpm to ending rpm, your car weight and tire type and diameter I can simulate 4.11 vs 4.56 and 4.88 on my drag strip analizer program

 

i posted my dyno results some time ago.

https://www.thirdgen.org/techbb2/sho...hreadid=141609

 

I ran what your engine combo said in the other thread on my engine anylizer program and WOW! guess what .The program said 449hp@6600 rpm Running it on the dragstrip analyzer was a bit tougher not knowing your exact set up but i put enough info into it to have it read 12.56 with 4.11's,12.38 with 4.56s, and 12.30 with 4.88s. MPH started to drop with the 4.88s. Oh yea it had you shifting around 7600 rpm!

 

thanks for the info.im amazed that your program predicted my engines power.I cant say much for DD2000 as it predicted 525 hp .
i shift my car at about 6600-6800 ish rpms.as far as shifting at 7600 rpms, i wouldnt know how it would do cause i never pulled my motor past 6800 on the dyno.

i dont know how much my car weighs,so id guess it would be around 3600 with me in it. The drivetrain on my car consist of
TH350 with 10 inch coan converter(3500 rpm stall) and a 4.11 9 inch.

 

I did some more playng with the drag program . It had you starting at 12.7@107 with the 4.11s shifting around 7300. 12.5@108 with 4.56 shifting at 7200 and 12.4@109 shifting @7100 with 4.88's

 

Ok last time I'm switching pcs tonight . Going by your 3600 weight and 6800 rpm shift point it has you at 12.73@107.26, shifting at 7100 gets you to 12.64@108.17 and shfting @7300 gets you 12.604@108.65. I think that has to be pretty close to your dialed in combo right now. Going to 4.56 will get you roughly .2, and 4.88 should get you .3 more

 

Didn't run open headers, got those shorties on there plus everything is welded from the y-pipe back. I want to though dangit lol. I'm not sure how much it gained with the rear swap. Never made it to the track before swapping in the 9" because I broke the locker in the 10 bolt. Wasn't about to do a peg leg run. The only time I have to go by is a g-tech run which was a 14.21.

With the setup now, 4.56 gears and 26x11.50x15 Hoosier quick time pros, I'm crossing the line at 6,000 - 6,100 rpm. Part of what's going on is probably the converter too, might be too tight for my engine since it was set up for a blown big block making 1000 hp. I'm not going to change it though since I'm sticking in a different engine probably during the winter months.

 

Well, I just might be changing out the converter after all lol. Priced a custom one out today matched to my combo, 425 bucks I'll put aside the good converter for the big block. Dunno when the swap is going to happen though, probably within the next couple months. Converter change and new exhaust will hopefully put me into the 12's After that, it's time for the bottle

 

How much stall are we talking here and how many inches? I would go with a Hughes 4000 pro street if I were you and never look back

 

Not sure of the diameter but the guy said he wouldn't go over a 3500 stall with the cam I have. Told him it would be mostly street driven but still want it loose for the track so maybe he's being conservative. The Hughes unit and this one I got quoted are about the same price from what I saw. More chit to think about LOL thanks