track times with ls1

[1FAST68]

I made it to the track finnally.
Ran 3 back to back 1/4 mile passes.
all 3 were 12.41 at 106.5, my 60ft was a soft 1.85.

I would take some more pics of the truck but my wifes camera died. There is some on the board somewhere though.

Engine is a 6.0L iron block, L92 heads, and thorley headers. I copied the 6.0L that carcraft did. I just used a proform 750 instead of a 850.
Transmission is a turbo 350 with a PTC street fighter convertor, it needs to be looser. Rear gear is a 3.73 (needs lower gear) and a 315/60 drag radial.

[Marv D]

That's looking good. What happend in the first 60' will compound down track,, so I see closer to 12.oh's in your future once you get it hooking.
Good job.

[djracer]

That's very impressive with the soft 60ft. I went almost that 60ft with a 13.554 1/4 in my old 71 street truck on a 28.5 12.5 Sportsman Pro

[1FAST68]

Thanks,

I know it would pick up alot with more gear or higher stall. I am still tuning on the carb right now.

[Super73]

First time at the track, my truck bested a 12.44@110mph with a 1.87 60'. This was 3,900lbs with me in it (57/43 weight bias), 3.73 gears, 26" tire and a 3,200 rpm stall. You have a few more cubes than me starting with a 6.0 block, but I would bet you have more weight as well it being an iron block.

Dropping down to 3,840 (53/47 weight bias), going to a 4,400 verter (flashes to 4,900), running a 30" tall tire, adding a crank pulley and adjusting the tune slightly I ran the numbers in my sig.

You definately have more in it.

What size verter is in it now?
What about weight?
Also, how is your tune?

[1FAST68]

Originally Posted by Super73

First time at the track, my truck bested a 12.44@110mph with a 1.87 60'. This was 3,900lbs with me in it (57/43 weight bias), 3.73 gears, 26" tire and a 3,200 rpm stall. You have a few more cubes than me starting with a 6.0 block, but I would bet you have more weight as well it being an iron block.

Dropping down to 3,840 (53/47 weight bias), going to a 4,400 verter (flashes to 4,900), running a 30" tall tire, adding a crank pulley and adjusting the tune slightly I ran the numbers in my sig.

You definately have more in it.

What size verter is in it now?
What about weight?
Also, how is your tune?

converter is a ptc super street fighter, I think it is a 3400-3600.

I have an idea on weight, probably 3900 with me. I have not weighed it yet the scales at the track were not working.

I tried the timing from 32-36 and it still ran the same. The air/fuel ratio was 12.2 at the track, also it didn't act right transitioning to wot.
I have been working on that tonight and have it figured out.

[Super73]

Also, curious to know what the part number is on the headers you bought.

[1FAST68]

Originally Posted by Super73

Also, curious to know what the part number is on the headers you bought.

I bought the headers from doug thorely, they said I was like the 3rd or 4th person to get them.
I will have to try and find the part #.

[1FAST68]

I have some new pics if someone wants to resize them so they will post.

[djracer]

Originally Posted by 1FAST68

I have some new pics if someone wants to resize them so they will post.

send them to me ktolliver@montgomeryal.gov

[1FAST68]

emailed you 2 pics
thanks for posting them.

[djracer]

try ktolliver@elmore.rr.com

[djracer]

here ya go.

[pcmcobra]

looks sick!
Hoping to have my 6.0 on the road Thursday!
Those times are pretty good

[Captkaos]

Should be thy324y-c for the 67-72's. Jamie posted the info here and posted a board price also.
http://67-72chevytrucks.com/vboard/s...d.php?t=287231

[1FAST68]

Updated..

I worked on the tuneup,,jetting and pumpshots.
1.81 60ft
12.24 at 108mph.

I have not taken the powersteering loose or waterpump, also have full exhaust. I now have some better mufflers for it.
I sent my convertor off to PTC to get it loosened up 500, maybe that will help the most to get it in the 11's..

Anybody know how much a electric water pump will help?

[ripdog28]

Electric Water pump may give you 12-15HP @6000+

Love the truck

[1FAST68]

Originally Posted by ripdog28

Electric Water pump may give you 12-15HP @6000+

Love the truck

I want one bad but they are pricey.

[Super73]

Improvements are good. Any idea where your making peak TQ? you might be better with a 4,400 verter.

[1FAST68]

Originally Posted by Super73

Improvements are good. Any idea where your making peak TQ? you might be better with a 4,400 verter.

Don't know about the tq, but it doesnt have any down low. The truck doesn't start really moving till 5k. I shift at 7000 and it drops to 5100-5200. I can footbrake this convertor to 3000, if I am rolling in high gear and floor it, it seems like it goes to 3800-4000.

I did weigh it. With me in it, it weighs 3800 on the dot.

[Super73]

Are you looking for a street or race pump? I have two Mezeires, one street and one race. Been thinking about selling the race one but I probably should keep it for the car.

I'd say go with the 4,400 verter. Going from a 3,200 to a 4,400 (flashes to 4,900 at the track) I dropped a solid .2 in my 60'.

[1FAST68]

Originally Posted by Super73

Are you looking for a street or race pump? I have two Mezeires, one street and one race. Been thinking about selling the race one but I probably should keep it for the car.

I'd say go with the 4,400 verter. Going from a 3,200 to a 4,400 (flashes to 4,900 at the track) I dropped a solid .2 in my 60'.

I want the street pump, I am eventually going to put heat and a/c in the truck, plus I need to keep the powersteering.

If I could just drop a .1 on 60' I think it would run 11's.
How far does yours drop back on the shift change?

[Super73]

The old converter was about 2k rpm. This one is about 1,600 rpm.

[1FAST68]

Mine drops from 7k to 5000 on the shift change.

[Super73]

That was my old converter.. 7,400 to 5,400.. The added stall speed will help both the 60' and shift extension. It will get you in your power band faster and keep you there.

I noticed that with the old converter, shifting at 7,400 netted the best ET and the new one 7,100 netted the best ET. Both would have come in to the next gear at 5,400-5,500.