recurving governor on th350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluzman2004 · 05-22-2002, 10:21 PM

I saw this on another post and thought i would ask. When re-curving the governor, what makes is shift later. Less weight or more.
Thanks,

------------------
69 Chevy ProStreet, Low and wild. Check it out http://y42.photos.yahoo.com/bluzman2004

Sinister · 05-23-2002, 06:39 PM

try an adjustable modulator first...
less work, dial those shift points right in...

------------------
beat it to fit,
paint it to match...
http://www.geocities.com/maggotspawn/gearhead.html

69 longhorn · 05-23-2002, 07:41 PM

Lighter weight should make it shift later,usually if the gearset is changed(ratio change),or a trans is used from another app the shift points will be off. if you are only off a little bit, the adjustable modulator will probably take care of the problem. In my case ,I had a set of 4.10 gears, & the trans came out of something with 2.73 gears. I curved the gov,& then used modulator adjustment to fine tune the shift points. it took 2 or 3 trys to get the gov where i wanted it,but the hardest part was jacking the truck up! You will only loose about a quart of fluid when you pop the cover to pull the gov. good luck......69longhorn.

bluzman2004 · 05-23-2002, 09:21 PM

Thanks for the info. I think I will try the modulator first. If I don't have any luck with that, I'll go to the next step.

------------------
69 Chevy ProStreet, Low and wild. Check it out http://y42.photos.yahoo.com/bluzman2004

LT-102 · 05-23-2002, 09:44 PM

I just changed my TH-350's shift points using a B&M Shift Point kit. I also have 4.10 gears. Where are your shift points now, and where do you want them to be? I will help you all I can if you let me know this information.

bigjimzlll · 05-23-2002, 10:34 PM

hi..my shift points now are @4000.....i would like 5200

------------------
67 lwb fleetside...first hotrod in 25 years...355..186 bowl ported heads..268h comp cam 600 1405...stealth intake..HEI..th350 with 2500 rpm stall..3:73 POSI
god I love to go fast

Anderson,CA....and boy does it get hot here....

LT-102 · 05-24-2002, 07:01 AM

You will need a shift point kit to make this change. I used the B&M brand. Don't know if anybody else makes one or not. If you can determine the weight of your stock weights it would help. I was luckey enough to have access to a grams scale. To make the rpm change that you want requires very small change in weight. I went from 4500 to 5600 on my rpm change.

If you can get the weight of the stock weights you first test should be with changing one (1) of the stock weights to the next lighter custom weights and make a test run. Let me know what rpm' you get. Remember it's trial and error. Good luck.

**MikeB** · 05-24-2002, 08:28 AM

Hey, LT-102. Where did you get your B&M shift point kit and what's the part number? A few years ago, Summit Racing told me it was no longer available. By the way, for everyone reading this, there's a good section on modifying governors in the "Turbo Hydra-matic 350 Handbook" by HP Books. I lightened my inner weights following their instructions which increased my wide-open throttle shift points. And I think it might have changed the RPM range of the modulator adjustment. I do know that the modulator is totally bypassed at WOT.

------------------
MikeB
69 C-10 Fleetside, mild 383, Dart Iron Eagle heads, Crane Energizer 266 cam and 1.6 roller rockers, Edelbrock Performer manifold and 600cfm carb, HEI w/ MSD components, 1986 front spindles/disc brakes, Vintage Air in-dash.

[This message has been edited by MikeB (edited May 24, 2002).]

69 longhorn · 05-24-2002, 09:18 AM

Here you go... http://store.summitracing.com/partdetail.asp?part=10100

05-22-2002, 10:21 PM	#1
bluzman2004 Registered User Join Date: Jan 2001 Location: OliveBranch, MS Posts: 154	recurving governor on th350 I saw this on another post and thought i would ask. When re-curving the governor, what makes is shift later. Less weight or more. Thanks, ------------------ 69 Chevy ProStreet, Low and wild. Check it out http://y42.photos.yahoo.com/bluzman2004 __________________ 69 Chevy ProStreet, Low and wild. 78 Corvette rturnpaugh@compcams.com

05-23-2002, 06:39 PM	#2
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	try an adjustable modulator first... less work, dial those shift points right in... ------------------ beat it to fit, paint it to match... http://www.geocities.com/maggotspawn/gearhead.html __________________ Beat it to fit, Paint it to match...

05-23-2002, 07:41 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	Lighter weight should make it shift later,usually if the gearset is changed(ratio change),or a trans is used from another app the shift points will be off. if you are only off a little bit, the adjustable modulator will probably take care of the problem. In my case ,I had a set of 4.10 gears, & the trans came out of something with 2.73 gears. I curved the gov,& then used modulator adjustment to fine tune the shift points. it took 2 or 3 trys to get the gov where i wanted it,but the hardest part was jacking the truck up! You will only loose about a quart of fluid when you pop the cover to pull the gov. good luck......69longhorn. __________________ http://community.webshots.com/user/hotrodhorn

05-23-2002, 09:21 PM	#4
bluzman2004 Registered User Join Date: Jan 2001 Location: OliveBranch, MS Posts: 154	Thanks for the info. I think I will try the modulator first. If I don't have any luck with that, I'll go to the next step. ------------------ 69 Chevy ProStreet, Low and wild. Check it out http://y42.photos.yahoo.com/bluzman2004 __________________ 69 Chevy ProStreet, Low and wild. 78 Corvette rturnpaugh@compcams.com

05-23-2002, 10:34 PM	#6
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	hi..my shift points now are @4000.....i would like 5200 ------------------ 67 lwb fleetside...first hotrod in 25 years...355..186 bowl ported heads..268h comp cam 600 1405...stealth intake..HEI..th350 with 2500 rpm stall..3:73 POSI god I love to go fast Anderson,CA....and boy does it get hot here.... __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

05-23-2002, 09:44 PM	#5
LT-102 Registered User Join Date: Nov 2000 Location: Greenville, Oh USA Posts: 166	I just changed my TH-350's shift points using a B&M Shift Point kit. I also have 4.10 gears. Where are your shift points now, and where do you want them to be? I will help you all I can if you let me know this information.

05-24-2002, 07:01 AM	#7
LT-102 Registered User Join Date: Nov 2000 Location: Greenville, Oh USA Posts: 166	You will need a shift point kit to make this change. I used the B&M brand. Don't know if anybody else makes one or not. If you can determine the weight of your stock weights it would help. I was luckey enough to have access to a grams scale. To make the rpm change that you want requires very small change in weight. I went from 4500 to 5600 on my rpm change. If you can get the weight of the stock weights you first test should be with changing one (1) of the stock weights to the next lighter custom weights and make a test run. Let me know what rpm' you get. Remember it's trial and error. Good luck.

05-24-2002, 08:28 AM	#8
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Hey, LT-102. Where did you get your B&M shift point kit and what's the part number? A few years ago, Summit Racing told me it was no longer available. By the way, for everyone reading this, there's a good section on modifying governors in the "Turbo Hydra-matic 350 Handbook" by HP Books. I lightened my inner weights following their instructions which increased my wide-open throttle shift points. And I think it might have changed the RPM range of the modulator adjustment. I do know that the modulator is totally bypassed at WOT. ------------------ MikeB 69 C-10 Fleetside, mild 383, Dart Iron Eagle heads, Crane Energizer 266 cam and 1.6 roller rockers, Edelbrock Performer manifold and 600cfm carb, HEI w/ MSD components, 1986 front spindles/disc brakes, Vintage Air in-dash. [This message has been edited by MikeB (edited May 24, 2002).] __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

05-24-2002, 09:18 AM	#9
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	Here you go... http://store.summitracing.com/partdetail.asp?part=10100 __________________ http://community.webshots.com/user/hotrodhorn

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