Wow. That is exactly opposite to what Mike saw on the dyno.

Did you try the headers before you changed gears?

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Official Cookie and Mater Tormentor.

Wow. That is exactly opposite to what Mike saw on the dyno.

Did you try the headers before you changed gears?

_________________
Official Cookie and Mater Tormentor.

I did not expect that either.


Yes I tried those headers about 3 weeks ago, and have not made a run yet with the 4.88's


Greg

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http://www.youtube.com/hyperpack

That is incredibly interesting.

_________________
Official Cookie and Mater Tormentor.

Greg, do the 6 into 1 headers have 1 1/2" OD pipes?

_________________
If you didn't drive it there, it's not a street car.

Check Here Seymour..
http://slantsix.org/forum/viewtopic.php ... &start=780

It's OD tube size, but you get the idea.

Greg

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http://www.youtube.com/hyperpack

Well I got the locking stage 8 bolts for the torque conv. installed.
The underhead length was a bit on the long side so I had to cut them down a bit. - They are just arp Bolts with a Notch cut into the Head for the lock ring to slide into.










We will see if they hold when I head to the track to test out the 4.88's



Greg

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http://www.youtube.com/hyperpack

wondering...

_________________

slant six's RULE!
http://www.usajon.com

No it's Plastic.


Greg

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http://www.youtube.com/hyperpack

Well I went to test n tune lat night and tried out the 4.88 gear set.

I observed no real gain in et or speed on any of the parts of the time slip.

slowest pass was a 12.35@ 106 and best pass was 12.18@ 107

et s are slower by .2 and 2 mph slower at the quatr mile traps


air was cool and barometer was steadily rising the entire night so I believe in those conditions with the 4.56's ruster would have been faster.

So I will be putting the 4.56's back in and install the rear disc kit.. it should shave some weight from the back suspension.

good news was that the stage 8 locking fasteners did not loosen yet.

Greg

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you know the old school thoughts were a bigger foot print would get u down the track quicker.
what is the launch rpm ?
do the 4:88's spin much ?

_________________

slant six's RULE!
http://www.usajon.com

Greg, do you track humidity too? On cool nights it is not unusual for the humidity to go up.

Little motors seem to dislike humidity more than heat.

Rising barometer should have been good.

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Official Cookie and Mater Tormentor.

@ slantzilla:

yes I kept track of the humidity and the car was going faster as the baro went up; at the same time temps went down and the humidity went up.

my car seems to respond to tempature and pressure as primary factors and humidity as a secondary factor. I am not sure if it's my combination or what but thats the trend since I started to log the runs and keep track with my weather station.

so by my expierence the car would have been getting faster as the night went on.. and it did that with the 4.88's....... but still a tenth to two tents off the mark and 2 mph slow through the traps for the air conditions.
If I compared the air conditions to similar runs made with the 4.56's the car would have been quicker.

also the car just didn't feel as aggressive as with the 4.56's. for what is worth...


@ usajon:
bigger footprint? do you mean a taller tire or wider tire?.

no I am keeping the same tire and I connot fit anything bigg than what I haveq now.

I tried launching at 2000, 2500, 3000, and 3500. it did better with the higher launch rpm, and it did hook. no spinning issues.. but it seems that the 488's are too low for the sweet spot in my combo.


Greg

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OK

I reviewed your youtube launch and I did not see any spin, or hear any. I see you use a line lock. Have you ever considered a trans brake ?
Have you ever launched @ 4000 ?

these things will lead to more broken weak parts on the car though.

_________________

slant six's RULE!
http://www.usajon.com

Jon the launch on YouTube was With the 4.56 gears, not the 4.88 gears

I have considered using a trans brake but I have not thoroughly investigated it yet with respect to. cost etc.

the highest launch rpm I can achieve is 3500... any higher and it will push throught the beams.



Greg

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