Shifting too early ?
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Shifting too early ?
This test was made with the selector on "Drive" position , i have a SuperRam ,58mm TB,AFR195, 3200 Stall, B&M Shift Kit, 3.07 gears
Should i push the TVCable inside a bit , safely, without cooking the trans ? Thanks
Should i push the TVCable inside a bit , safely, without cooking the trans ? Thanks
Race Director
Joined: Apr 2003
Posts: 17,698
Likes: 1,667
From: moraga ca
Caleb, you would want to change your wide open shift points by lightening up the governor weights, not changing the tv cable. Since you are pretty close, and your part throttle points I assume are good, take off the cap and remove the governor. You can shave a little of the outside edges of the 2 weights (use a dremel or grinder). Clean, replace and test drive. You should be able to raise your wot points to where you want them to be. Willie
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Sammy,
Adjust the TV cable on your 1987 Vette exactly as the 1987 FSM shows & directs you to.
No other way.
Change shift points like 383 Vette said to.
Changing governor weights & springs or with a Sonnex Blue governor gear assembly.
B&M 700R4 & Turbo 400 Governor recalibration kit is what many recommend here.
Adjust the TV cable on your 1987 Vette exactly as the 1987 FSM shows & directs you to.
No other way.
Change shift points like 383 Vette said to.
Changing governor weights & springs or with a Sonnex Blue governor gear assembly.
B&M 700R4 & Turbo 400 Governor recalibration kit is what many recommend here.
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
I've read about it and i don't want to shave them because it might affect low rpm shift points maybe ...i saw this "Superior Shift point Package" pack, any of you have use this?
http://cgi.ebay.com/ebaymotors/330352037720
http://cgi.ebay.com/ebaymotors/330352037720
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Sammy,
Adjust the TV cable on your 1987 Vette exactly as the 1987 FSM shows & directs you to.
No other way.
Change shift points like 383 Vette said to.
Changing governor weights & springs or with a Sonnex Blue governor gear assembly.
B&M 700R4 & Turbo 400 Governor recalibration kit is what many recommend here.
Adjust the TV cable on your 1987 Vette exactly as the 1987 FSM shows & directs you to.
No other way.
Change shift points like 383 Vette said to.
Changing governor weights & springs or with a Sonnex Blue governor gear assembly.
B&M 700R4 & Turbo 400 Governor recalibration kit is what many recommend here.
Thank you Brian !
This is the one then !
http://www.summitracing.com/parts/BMM-20248/
Race Director
Joined: Apr 2003
Posts: 17,698
Likes: 1,667
From: moraga ca
I've read about it and i don't want to shave them because it might affect low rpm shift points maybe ...i saw this "Superior Shift point Package" pack, any of you have use this?
http://cgi.ebay.com/ebaymotors/330352037720
http://cgi.ebay.com/ebaymotors/330352037720
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Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Yes.
Its a good idea to check TV cable adjustment as part of your routine maintenance such as during oil changes or setting overhead valves.
Improperly adjusted TV cable & your C4 700R4 will protest badly & die an early death on you.
TV cable & plunger inside of valvebody is the brain that determines light throttle driving & WOT full line pressure for fast full power driving & racing.
Millions of 700R4's have died early on because of improperly adjusted TV cables.
Brian
Its a good idea to check TV cable adjustment as part of your routine maintenance such as during oil changes or setting overhead valves.
Improperly adjusted TV cable & your C4 700R4 will protest badly & die an early death on you.
TV cable & plunger inside of valvebody is the brain that determines light throttle driving & WOT full line pressure for fast full power driving & racing.
Millions of 700R4's have died early on because of improperly adjusted TV cables.
Brian
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
For the most part, wot is determined by weights, part throttle by springs. The kits have weights that are a lot lighter than stock. You'll have to mess with both springs and weights. It takes a lot of time. Been there, done that. I would still recommend shaving the weights. It'll affect wot much more than part throttle.
ouch sounds like a long project !
i didn't want to shave them since some chip might get in or so...
Yes.
Its a good idea to check TV cable adjustment as part of your routine maintenance such as during oil changes or setting overhead valves.
Improperly adjusted TV cable & your C4 700R4 will protest badly & die an early death on you.
TV cable & plunger inside of valvebody is the brain that determines light throttle driving & WOT full line pressure for fast full power driving & racing.
Millions of 700R4's have died early on because of improperly adjusted TV cables.
Brian
Its a good idea to check TV cable adjustment as part of your routine maintenance such as during oil changes or setting overhead valves.
Improperly adjusted TV cable & your C4 700R4 will protest badly & die an early death on you.
TV cable & plunger inside of valvebody is the brain that determines light throttle driving & WOT full line pressure for fast full power driving & racing.
Millions of 700R4's have died early on because of improperly adjusted TV cables.
Brian
I'm pretty sure its fine but i will double check it , i believe its fine because i'm always shifting very hard on it , it has taken a lot of abuse
since i overhauled it 3 years ago.
On "2" seems to get higher RPM's
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Btw ...i posted another thread about my Tach, seems to work fine ?
bypassed tach filter :
http://forums.corvetteforum.com/c4-t...ash-video.html
bypassed tach filter :
http://forums.corvetteforum.com/c4-t...ash-video.html
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
ouch sounds like a long project !
i didn't want to shave them since some chip might get in or so...
Yes i know , i've seen a couple die !
I'm pretty sure its fine but i will double check it , i believe its fine because i'm always shifting very hard on it , it has taken a lot of abuse
since i overhauled it 3 years ago.
i didn't want to shave them since some chip might get in or so...
Yes i know , i've seen a couple die !
I'm pretty sure its fine but i will double check it , i believe its fine because i'm always shifting very hard on it , it has taken a lot of abuse
since i overhauled it 3 years ago.
I recheck mine every time I change oil at 3,000 miles.
I check it not once but 3 times to be sure.
I took a hacksaw blade & scribed a permanent line along the protruding adjustment nose to always know where it was at when I installed my freshly rebuilt 700R4 by me.
If the TV cable is out adjustment badly,
Your 700R4 will die within 50 miles driving fast.
Likely 1 or 2 1/4-mile full power passes.
You drive fast like me too I know.
Better safe than sorry I say.
Recheck TV anyway.
You will sleep better at night that way.
BR
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
holding my son nicholas right now sammy.
i will write/ post later to you on c4 on your unaswered thread.
have 1st hand experience with tachometer read out problems on my 87 vert too.
its in the lcd - liquid crystel display itself.
seen a static discharge high kv voltage spike shorting out internal wiring invisible to your eye.
removed, present under lighting with a magnifying glass & sharp eyes.
have to go be a father for now.
later sammy,
brian
i will write/ post later to you on c4 on your unaswered thread.
have 1st hand experience with tachometer read out problems on my 87 vert too.
its in the lcd - liquid crystel display itself.
seen a static discharge high kv voltage spike shorting out internal wiring invisible to your eye.
removed, present under lighting with a magnifying glass & sharp eyes.
have to go be a father for now.
later sammy,
brian
