modified shift points - track result.
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
modified shift points - track result.
I'm right now at the Corvette Challenge in Bradenton...
After my new governor refused to shift last Sunday, I replaced the spring in it with the spring from my old governor.
Just made my first pass with the modified governor. It shifts a little lower then I'd like the tranny to shift but 1000 rpm higher than it used to shift with the old governor. The tranny shifts now exactly at 6000 RPM (5000 with the stock governor).
I picked up over a tenth at the 1/8 mile and .15 at the 1/4 mile compared to runs in the same conditions. (88 degrees with high humidity)
Ran 7.11 1/8 mile and 11.23 1/4 mile @118.56 mph. That's great for a hot summer day.. With another 500 RPM higher shift points and the new intake which I'll install soon, I could hit 10's in summer...and mid 10's in winter
After my new governor refused to shift last Sunday, I replaced the spring in it with the spring from my old governor.
Just made my first pass with the modified governor. It shifts a little lower then I'd like the tranny to shift but 1000 rpm higher than it used to shift with the old governor. The tranny shifts now exactly at 6000 RPM (5000 with the stock governor).
I picked up over a tenth at the 1/8 mile and .15 at the 1/4 mile compared to runs in the same conditions. (88 degrees with high humidity)
Ran 7.11 1/8 mile and 11.23 1/4 mile @118.56 mph. That's great for a hot summer day.. With another 500 RPM higher shift points and the new intake which I'll install soon, I could hit 10's in summer...and mid 10's in winter
Last edited by GrandSportC3; Jun 26, 2005 at 02:27 AM.
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St. Jude Donor '03, '06, '17
Well, I knew that the 5000 rpm shift point cost me big time... I still have no plans of shifting at 8000 RPM 
but 7000 seems like an option... I could pick up another tenth...
but 7000 seems like an option... I could pick up another tenth...
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St. Jude Donor '03, '06, '17
Ran my 2nd pass...
I spun, so my ET was only in the 11.30 range. However, my mph was at 120 mph which is incredible for a hot and humid day...
I spun, so my ET was only in the 11.30 range. However, my mph was at 120 mph which is incredible for a hot and humid day...
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Good work....get it up just over 7000 rpm where it really wants to be!!
JIM
JIM
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
Originally Posted by 427Hotrod
Good work....get it up just over 7000 rpm where it really wants to be!!
JIM
JIM
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From: Not Correctly Restored Stingray Fla.
If you originally went with a TH400 with a manual valve body you would have been in the 10's a long time ago. You have a tranny out of a 6 cylinder with overdrive. You have mentioned numerous times (since the "new set-up" is in) that you only drive to local cruise-ins and you do not drive the car long distances. What the hell are you doing with a tranny with O.D. I know your original intentions were different but now that things have changed get a TH400 (with a REAL trans-brake). BUT if you eat before your first run (with the TH400) you better be wearing a diaper.
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St. Jude Donor '03, '06, '17
Originally Posted by tallgirl
Do you have a dyno sheet you could post?
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St. Jude Donor '03, '06, '17
Originally Posted by LOTAHP
If you originally went with a TH400 with a manual valve body you would have been in the 10's a long time ago. You have a tranny out of a 6 cylinder with overdrive. You have mentioned numerous times (since the "new set-up" is in) that you only drive to local cruise-ins and you do not drive the car long distances. What the hell are you doing with a tranny with O.D. I know your original intentions were different but now that things have changed get a TH400 (with a REAL trans-brake). BUT if you eat before your first run (with the TH400) you better be wearing a diaper.
1) lighter
2) eats less HP
3) better gear ratios
I'm not under time pressure to hit 10's.. There's no doubt at all that I'll hit 10's.. maybe even this summer. It will be possible to get the shift points where I want them and still will have a automatic valve body.
I also finally got some decent R/T's with my setup: .012, .061 and .077..
For the next months, I'll be tweaking engine and transmission..and I predict high 10's in summer and mid 10's in winter
.I'm extremely satisfied with my engine.. It's a real beast with a great power band
. Except the shift point which I will get where I want it, I'm also very pleased with the TH200R4... Other than the shift point, the tranny is excellent. Love those gear ratios..BTW, the new governor was modified for the spring not to pop out, so I won't have to worry about it to pop out
.So far, I have close to 40 passes on the 200R4 and it holds up excellent..
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St. Jude Donor '03, '06, '17
Originally Posted by Skid*MARK
If you want to see it move, slap a glide with a 5500 stall and a brake in it and hold on for a ride.
If I would go with over 800 HP, the glide would be my choice... For my current setup, the TH200R4 is adequate.. It has held up good and should last for the rest of the seasn... It would be great if it would hold up for 2 seasons...
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
The glide is a great transmission. However, the 1st gear ratio would cost me .1 - .2 at launch, even with the big converter.
If I would go with over 800 HP, the glide would be my choice... For my current setup, the TH200R4 is adequate.. It has held up good and should last for the rest of the seasn... It would be great if it would hold up for 2 seasons...
If I would go with over 800 HP, the glide would be my choice... For my current setup, the TH200R4 is adequate.. It has held up good and should last for the rest of the seasn... It would be great if it would hold up for 2 seasons...
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
Originally Posted by 69 N.O.X. RATT
Ya, right now you are too heavy without enough power for a glide.
That would bring the weight down to 2000 lbs or so.. I've got a friend with a '78 tube chassis Vette that weights about 2000 lbs
He is running a glide and gets 1.40 60' times and low 10's on engine with about the same horsepower that I have...
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you must not have been looking hard enough, there was a tube chassis on ebay not long ago and I tihnk it was on racing junk also ('t was a red car), why swap the body if you can find a tube chassis w/ roll cage and all, which would make swapping bodies extremely difficult. I'd just swap the driveline and be done with it.
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St. Jude Donor '03,'11
Originally Posted by GrandSportC3
hopefully I'll run into a nice tubed chassis for my Vette
That would bring the weight down to 2000 lbs or so.....
That would bring the weight down to 2000 lbs or so.....
Why didn't you get an aluminum block?
