Got my TH350.. Now what
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Staging Lane
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From: Ocean Springs, MS (Gulf Coast)
Got my TH350.. Now what Ok well I ended up getting a TH350 from my buddy today. Its brand new 0 miles and built with all kinds of B&M stuff, Shift kit etc. I am going to most likely send it in and get it built a lil more extreme with a trans brake and stuff. Well now my question is what else do I need to get. What flywheel is the best to go with for a 750-800hp motor (N20), Will my orginal starter I have now still work with this tranny, its a jegs mini torque starter with universial pattern.. I know I need a different driveshaft now, and obvisiously its gonna be shorter right? Anyone know what length I need, or what brand would be best for my setup? Also do they make any aftermarket crossmembers that will bolt up to my car (93 Bird) and the th350? And what do I do about mounting the torque arm now?
Staging Lane
Joined: Apr 2004
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From: Rockingham, NC
Originally Posted by 93 4mula
Ok well I ended up getting a TH350 from my buddy today. Its brand new 0 miles and built with all kinds of B&M stuff, Shift kit etc. I am going to most likely send it in and get it built a lil more extreme with a trans brake and stuff. Well now my question is what else do I need to get. What flywheel is the best to go with for a 750-800hp motor (N20), Will my orginal starter I have now still work with this tranny, its a jegs mini torque starter with universial pattern.. I know I need a different driveshaft now, and obvisiously its gonna be shorter right? Anyone know what length I need, or what brand would be best for my setup? Also do they make any aftermarket crossmembers that will bolt up to my car (93 Bird) and the th350? And what do I do about mounting the torque arm now?
TCI makes an SFI approved LT1 flexplate that works with the stock starter. LT1's have a different tooth count from std SBC's and also have a counterweighted flexplate. I see youve built a 383 so depending on how your engine was balanced will determine if you use a LT1 specific or SBC flexplate.
The starter bolts to the engine and I see no reason it wouldnt work. Im using a stock starter with my th350.
DO you need a new DS? my stocker worked fine, but there are different Th350 with different tailshaft lengths. I have a short tailshaft th350 which is most desirable for using in an F car.
Dunno about the crossmemeber, mines a modded stock.
Buy a short Torque arm like spohn's.
Matt
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Joined: Jan 2006
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From: ringgold,ga
i used the same starter when i changed mine over. also the same flywheel. i also used the stock crossmember. i moved it up and only used two bolts instead of four, with no other modification to it. i did have to have a torque arm bracket made. although, if you use a diff. type torque arm that doesnt attach to the trans. then you wouldnt have to buy the bracket. i run a jeg's adjustable that bolts to the trans. tunnel of the floor pan. i also use an aftermarket shifter( b&m proratchet). i dont remeber my driveshaft lenth but it is diff. with a short tailshaft turbo350.
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Staging Lane
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From: Ocean Springs, MS (Gulf Coast)
I think I have the short tailshaft on mine. Does anyone know the measurement of the short tail? BMR makes and aftermarket tranny cross member with a torque arm relocation mount for a th350. So this crossmember will eliminate my crossmember issure right? Heres a link to it..
Also my bottem end was internally balanaced from Eagle. So which flexplate do I need to get internal or external?
http://www.bmrfabrication.com/misc/TCC013.jpg
Also my bottem end was internally balanaced from Eagle. So which flexplate do I need to get internal or external?
http://www.bmrfabrication.com/misc/TCC013.jpg
Last edited by 93 4mula; Dec 4, 2006 at 07:39 AM.
First, Lt1 flexplates are no different from any other SBC. They are 153tooth stock... A 168tooth will work with the appropriate starter,
For the fewest issues, stay with the stock type starter/flexplate combination (153tooth). You need an SFI certified 153 tooth flexplate setup for a 1pc rear main seal engine, internally balanced.
Yes, that BMR crossmember will solve your mounting problems.
Short tail Th350 or not, they are slightly different in length than a 4L60 or T56, you will need a different driveshaft. Spohn.net sells them setup for your trans and rear end choices.
For the fewest issues, stay with the stock type starter/flexplate combination (153tooth). You need an SFI certified 153 tooth flexplate setup for a 1pc rear main seal engine, internally balanced.
Yes, that BMR crossmember will solve your mounting problems.
Short tail Th350 or not, they are slightly different in length than a 4L60 or T56, you will need a different driveshaft. Spohn.net sells them setup for your trans and rear end choices.
There are 3 different style tail shafts that th350s were made with: 6in, 9n, and 12in . If you have the 9in tailshaft and the stock rearend you can use a stock driveshaft. I bought a LS1 drive shaft and put it in during my TH350 swap.
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Staging Lane
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From: Ocean Springs, MS (Gulf Coast)
Sweet. I appreciate the help. So since my bottom end is internally balanced straight from Eagle then Ill want an Internally balanced flywheel? Someone told me that I needed to get a Nuetral Balanced flywheel??
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Thread Starter
Staging Lane
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From: Ocean Springs, MS (Gulf Coast)
Well I know that when I bought my kit that it was internally balanaced from Eagle. You could tell cause the crank had been drilled into in some spots etc.. So then I need a Neutral Balanced flywheel? So I basically just get a flywheel and cut the weights off of it right?
