I need thoughts on my 1320 times

**Hi-Po** · 09-18-2009, 12:32 AM

Well, Im just now getting my t56 launch down. I just cant figure out why my 1/8 mile times are so bad. Its just easier if I print this out, my camera takes horrible close pictures

Best time

60' - 1.8177
330ft - 5.1889
1.8th ET - 7.9397
1/8 MPH - 90.04
1000' et - 10.3048
1000' mph - 103.91
1/4 et - 12.2760
1/4 mph - 114.70

Now, my best 1/8 MPH was 92.43
Best MPH 1/4 was 115.75

The 1.81 was by best 60' as of yet. I know, its not great

I also know my setup is not perfect either. Its a live and learn thing. Be different in alittle while

What do you guys think about those times? I know im still going slow for my mods, and Im trying to take the FI route to keeping some of the most expensive ones. I cant help but think I have 11's tucked away. Car runs strong, very strong on the street. Have beaten many bikes and cars (or stayed with) that should have wasted me.

6.0
Fast 92/92
5.3 heads, ported mildly
230/236 .573 .580 114 LSA 110 ICL
Kooks 1 7/8's
Custom 4" exhuast, 4" cutout
Moser 9" / 4.11 gears
Tuned in SD

Seems to me, I need to end my 1st gear shift earlier. Shift into 2nd and drag that gear out. I think im spending too much time in 1st, even with the 4.11's. Maybe I need to actually worry about 2nd gear shifting before redline. (6800) Ive tried a few different shifting combos. But when your getting 60' like I was it didnt matter.

dyno'd 416 RWHP 375 RWTQ on a Mustang dyno on my old MAF tune.

Questions / Comments?

**BLKCLOUD** · 09-18-2009, 02:25 AM

At what rpm is your peak HP? Your shift points should be several hundred rpm beyond the peak.

What have you been shifting at?

**Hi-Po** · 09-20-2009, 10:09 PM

Originally Posted by BLKCLOUD

At what rpm is your peak HP? Your shift points should be several hundred rpm beyond the peak.

What have you been shifting at?

on this current tune I dont have an accurate dyno graph.

Heres the video of the 12.2 pass.

[MEDIA]http://s61.photobucket.com/albums/h44/hi-po2/?action=view&current=MVI_1796.flv[/MEDIA]

**Spikito** · 09-20-2009, 10:28 PM

numbers look good to me....but maybe thats just me

**Hi-Po** · 09-20-2009, 10:32 PM

Originally Posted by Spikito

numbers look good to me....but maybe thats just me

Seems im running slow to me. r

**Mr. Luos** · 09-20-2009, 10:37 PM

ET's look damn near like mine when I would bog....

**allbaugh_04** · 09-20-2009, 10:41 PM

The '60 could really improve...

**Hi-Po** · 09-20-2009, 10:52 PM

Yea, these 60' are killing me. But Im getting the hang of launching this pig. I hope to knock off at least another tenth this wednesday. I think my stock shocks and springs are also killing me.

**Hi-Po** · 09-20-2009, 10:53 PM

Dont think that video is working. Heres the link.

http://s61.photobucket.com/albums/h4...t=MVI_1796.flv

**allbaugh_04** · 09-20-2009, 11:10 PM

Think auto + stall

**Hi-Po** · 09-20-2009, 11:48 PM

Originally Posted by allbaugh_04

Think auto + stall

Except im a M6

**tnthub** · 09-23-2009, 12:35 PM

I run between 89-90 in the 1/8 and ET is between 7.4-7.6 depending on weather and track conditions.

My 60 foot times are between 1.5 and 1.6, again depending on whether I stage shallow or deep, and weather...

I hate to say it but I suspect the issue with with the launch and shifting... Practice makes perfect and sometimes it takes years of practice to get there...

Short shifting 1-2 is generally good. Powershifting is truly an art form when done properly.

What type of tires and wheels? I suspect you will get the most benefit with 15" rims and either 26" or 28" Et Streets (not the drag radials), depending on your goals.

**BLKCLOUD** · 09-23-2009, 01:24 PM

There are only 2 ways to find the correct shift points:

1) Dozens of trial-and-error runs with good record keeping of the results

2) An accurate HP curve (dyno) plotted against transmission ratios

The idea is to maximize average HP in each gear. Shifting higher or lower will change the average HP of the gear you were in, and the gear you are going into. If you had a printout of HP vs rpm (in 200 rpm increments), there are many online shift point calculators that can figure this up for you in seconds.

Rear-end gearing has no effect on shift points.

**Hi-Po** · 09-23-2009, 01:49 PM

Originally Posted by tnthub

I run between 89-90 in the 1/8 and ET is between 7.4-7.6 depending on weather and track conditions.

My 60 foot times are between 1.5 and 1.6, again depending on whether I stage shallow or deep, and weather...

I hate to say it but I suspect the issue with with the launch and shifting... Practice makes perfect and sometimes it takes years of practice to get there...

Short shifting 1-2 is generally good. Powershifting is truly an art form when done properly.

What type of tires and wheels? I suspect you will get the most benefit with 15" rims and either 26" or 28" Et Streets (not the drag radials), depending on your goals.

Dont feel bad telling me I suck at launching

I know it, and its alot of fun trying to get better. I totally agree with you on the wheels. I just simply do not have the funds that I did a few months ago to dump into the TA. Wheels are stock 17's (WS6) with MT ET Street's radials. I want nothing more than a nice drag wheel setup. I now feel I spent another 3000 dollars on rear end and driveshaft to spin in the first 60'.

I still need lots of practice, yes.

Originally Posted by BLKCLOUD

There are only 2 ways to find the correct shift points:

1) Dozens of trial-and-error runs with good record keeping of the results

2) An accurate HP curve (dyno) plotted against transmission ratios

The idea is to maximize average HP in each gear. Shifting higher or lower will change the average HP of the gear you were in, and the gear you are going into. If you had a printout of HP vs rpm (in 200 rpm increments), there are many online shift point calculators that can figure this up for you in seconds.

Rear-end gearing has no effect on shift points.

I need to get back on a dyno. Just the money is kinda tight. I was supposed to go back tonight, but it was someones b-day today/ that I forgot about

I might try for the friday test and tune, but is can get so busy at Milan on fridays its almost easier to wait till next wednesday.

**BLKCLOUD** · 09-23-2009, 03:06 PM

Good luck.

**35th-ANV-SS** · 09-23-2009, 03:12 PM

Originally Posted by BLKCLOUD

At what rpm is your peak HP? Your shift points should be several hundred rpm beyond the peak.

What have you been shifting at?

Sorry Ron, don't mean to jack your thread, but I have a quick question. Based on my DYNO graph, my peak HP is 330 at 5500RPM and peak TQ is 342 at 4700RPM . So based on this, what should I be shifting at? Also M6. Thanks.

**0rion** · 09-23-2009, 09:43 PM

what psi in the tires? Do you have a line lock to get a nice burnout?

**Hi-Po** · 09-23-2009, 10:31 PM

Originally Posted by 0rion

what psi in the tires? Do you have a line lock to get a nice burnout?

At the end of the night I had the at 17. No line lock. It is next on the list after shocks and springs. I really need to count down in my head from 5-1 for my burn out. I dont think im getting as good as I should.

**BLKCLOUD** · 09-24-2009, 02:38 AM

Originally Posted by 35th-ANV-SS

Sorry Ron, don't mean to jack your thread, but I have a quick question. Based on my DYNO graph, my peak HP is 330 at 5500RPM and peak TQ is 342 at 4700RPM . So based on this, what should I be shifting at? Also M6. Thanks.

Read my reply to Hi-po a few posts up. If you have the complete dyno graph, there are several shift calculators online that can be used to calculate shift points. Use the T56 1st thru 4th gear ratios (2.66, 1.78, 1.3, 1.0) and any one of them will spit out a good first guess.

**35th-ANV-SS** · 09-24-2009, 02:57 AM

Originally Posted by BLKCLOUD

Read my reply to Hi-po a few posts up. If you have the complete dyno graph, there are several shift calculators online that can be used to calculate shift points. Use the T56 1st thru 4th gear ratios (2.66, 1.78, 1.3, 1.0) and any one of them will spit out a good first guess.

Thanks