Th350, th400 or powerglide?
Th350, th400 or powerglide? I'm swapping my 6 speed over to an auto and I'm trying to decide what way to go. I have a track only 99 Z28, weighs 3350 with me in it, has spooled 4.30's with 28" Hoosier QTP's. It is currently a cam only stock heads and shortblock car with all the bolt ons. Cam is a TSP 228/228/581/581 112lsa. Currently has run a best of 11.29@121
I have heard that a glide is better in a lighter car and takes the least amount of power, the 350 is good but the 400 is better, will handle more power but takes more to run. I really do not care what trans I go with I just want the one that best for my setup but I just do not know how to figure out which is a better fit for my setup or what stall I need. I tried the search but couldn't really find what I was looking for.
This is a cam only NA car that is 99.999% track use only. Any help or advice would be appreciated.
I have heard that a glide is better in a lighter car and takes the least amount of power, the 350 is good but the 400 is better, will handle more power but takes more to run. I really do not care what trans I go with I just want the one that best for my setup but I just do not know how to figure out which is a better fit for my setup or what stall I need. I tried the search but couldn't really find what I was looking for.
This is a cam only NA car that is 99.999% track use only. Any help or advice would be appreciated.
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Joined: Aug 2007
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4l80e same as a 400 except for the 4th gear and lockup
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400 then to get a pproperly built glide you will spend just as much for a 80
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th350 is the best choice for an NA setup. The 4l80/400 are unnecessary, they'll just use extra power. If you get a powerglide, you'll be kicking yourself in the *** the first time you look at your 60'.
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I'm swapping my 6 speed over to an auto and I'm trying to decide what way to go. I have a track only 99 Z28, weighs 3350 with me in it, has spooled 4.30's with 28" Hoosier QTP's. It is currently a cam only stock heads and shortblock car with all the bolt ons. Cam is a TSP 228/228/581/581 112lsa. Currently has run a best of 11.29@121
I have heard that a glide is better in a lighter car and takes the least amount of power, the 350 is good but the 400 is better, will handle more power but takes more to run. I really do not care what trans I go with I just want the one that best for my setup but I just do not know how to figure out which is a better fit for my setup or what stall I need. I tried the search but couldn't really find what I was looking for.
This is a cam only NA car that is 99.999% track use only. Any help or advice would be appreciated.
I have heard that a glide is better in a lighter car and takes the least amount of power, the 350 is good but the 400 is better, will handle more power but takes more to run. I really do not care what trans I go with I just want the one that best for my setup but I just do not know how to figure out which is a better fit for my setup or what stall I need. I tried the search but couldn't really find what I was looking for.
This is a cam only NA car that is 99.999% track use only. Any help or advice would be appreciated.
Your car weighs about the same as a go-cart, lol. I wish mine were so light.
A properly assembled 350 is little more than a 400 with the 36 element sprag and drum assy. The 400 has a true center support and will take punishment for alot longer, but will cost a tenth. The 350 is lighter and uses less power. It has a 2.52 1rst gear-400 2.48. If you spend a little more, you can get the gear reductions. They take the same converters. Since your ride is so light, a 350 would work great! If it won't hold your power, the 400 is a good back-up. You can still use the converter! Good luck.
It was already light but I've since pulled the ac compressor, PS and the seats. It'll be getting a K member, manual rack and brakes as soon as I get this trans swap over with. I've got 3100# race weight in mind.I talked to Craig at Coan to see what he would suggest and he said either a PG or a th350 with an 8" 5000 stall. He says a pg will probably give up .1-.15 but would be a bit more consistent but not really a huge difference in the two.
Any of you guys run an 8" converter? Do you have to have a special flywheel or will the 98 model still work? Too many pros and cons. You think a 5000 is too much?
Last edited by cainsw; May 21, 2008 at 04:49 PM.
Hard to say on the 5000 stall. If the Coan rep was up to date with your whole setup, then he would probably no best. I think a 5000 stall would rock on your car personally, as long as you stay N/A. Did he rate the stall based on a trans-brake setup?
BTW, I gained a ton going from 4l60/4000 stall to a TH400/4800 stall, in the tune of .7 in ET (from 11.4 to a 10.7) and 7 mph (from 119 to 126) with the only other difference being I went from an LS6 intake to a FAST 90/90. I don't know why I gained so much, but I won't complain
.
Dan
BTW, I gained a ton going from 4l60/4000 stall to a TH400/4800 stall, in the tune of .7 in ET (from 11.4 to a 10.7) and 7 mph (from 119 to 126) with the only other difference being I went from an LS6 intake to a FAST 90/90. I don't know why I gained so much, but I won't complain
.Dan
Lol, yea it does but it will be lighter very soon. It was a factory stripper with only 3 options: Hurst shifter, GSC tires and a CD player It was already light but I've since pulled the ac compressor, PS and the seats. It'll be getting a K member, manual rack and brakes as soon as I get this trans swap over with. I've got 3100# race weight in mind.
I talked to Craig at Coan to see what he would suggest and he said either a PG or a th350 with an 8" 5000 stall. He says a pg will probably give up .1-.15 but would be a bit more consistent but not really a huge difference in the two.
Any of you guys run an 8" converter? Do you have to have a special flywheel or will the 98 model still work? Too many pros and cons. You think a 5000 is too much?
It was already light but I've since pulled the ac compressor, PS and the seats. It'll be getting a K member, manual rack and brakes as soon as I get this trans swap over with. I've got 3100# race weight in mind.I talked to Craig at Coan to see what he would suggest and he said either a PG or a th350 with an 8" 5000 stall. He says a pg will probably give up .1-.15 but would be a bit more consistent but not really a huge difference in the two.
Any of you guys run an 8" converter? Do you have to have a special flywheel or will the 98 model still work? Too many pros and cons. You think a 5000 is too much?
btw i went 1.52 on motor (~375hp) with the glide last night. That was footbraking to about 4k. Any more and the rear tires were starting to spin on the line. I have a 4500 stall so that makes since.
what are your raceweight goals? I had a 400 in my car before I built my glide and I love the glide WAY more.
FormerVendor
Joined: Oct 2006
Posts: 3,123
Likes: 3
From: D-F/W
Lot's of good advice here. The 400 and the Glide would be the units I would choose from. A 350 is just going to prove to be high maintenance in the long run, especially if and when you stroke it.
A well built Glide for that application would include 4340 straight cut gears and a 9310 output shaft. That is just under $1000 at most any supplier. Then you'll want to have at least 8 clutches in the drum, rear piston cut down to accept at least one and maybe 2 additional clutches, a billet steel dual ring servo, MVB with a brake, deep pan and hardened input shaft. That unit would ordinarilly run around $2,500 or so.
A well built 400 would run around $1,500 - $2,100 depending on how it is loaded out.
Hope that helps.
g
A well built Glide for that application would include 4340 straight cut gears and a 9310 output shaft. That is just under $1000 at most any supplier. Then you'll want to have at least 8 clutches in the drum, rear piston cut down to accept at least one and maybe 2 additional clutches, a billet steel dual ring servo, MVB with a brake, deep pan and hardened input shaft. That unit would ordinarilly run around $2,500 or so.
A well built 400 would run around $1,500 - $2,100 depending on how it is loaded out.
Hope that helps.
g