Turbo 250 or 350

FED 387 · 03-27-2010, 09:01 AM

It is my understanding that a 350 has almost the same external dimensions as the Glide, uses 15-17 more HP just to turn the transmission than a Glide and a 350 weighs a little bit more than a glide(maybe 15-20 pounds) and you cannot use a 350 with an engine that revs over like 7000 rpm( they want to self destruct). BUT you do get that extra gear in there!!!
Now a Metric 200 has the lite weight of a Glide, you can spin the engine well over 7000 RPM like a glide , it takes about the same amount of HP to turn the trans as a Glide AND you get the benefit of the extra gear. Its weak point is UNLESS it is really beefed up it will self destruct on its own at low RPM , in a heavy vehicle, in normal everyday street use that's why GM stopped using them.
Unless you are looking to extract the last thousandth out of your car--you do not either want the hassle of the maintainence or have the ability to do trans work you might be better to go with a 350 til you hit that plateau in your level of performance where you feel you could use the extra gear that both transmissions over---Comp 387

Bill Grubbs · 03-27-2010, 09:12 AM

Quote:

Originally Posted by FED 387

you cannot use a 350 with an engine that revs over like 7000 rpm( they want to self destruct).

We routinely hit 7800-8200 with a TuboAction T-350, and have not had any problems in 8+ years of using them. We do however freshen them up every 200-300 runs.

FED 387 · 03-27-2010, 09:29 AM

Bill---every one has their success story---yours is one of them---I'm by no means any kind of an expert on 200 vs 350 transmissions---Only that not very many if any of the Comp guys are using a 350----lotsa proflites /glides and some 200 but only ony guy I know of is/has been using a 350 and he is doing the R&D as a test vehicle for a racing trans company we all know---Comp 387

Kenny Wigington · 03-27-2010, 10:40 AM

I have been very pleased with my TurboAction 200. Paul, in my opinion, is the man for those !

Alan Roehrich · 03-27-2010, 12:04 PM

Nope, a 350 will not explode at RPM in excess of 7000. I've built them since 1984, and never seen one explode, and that includes a lot of race transmissions.

Nothing explodes like a TorqueFlite!!!!!!!

Caperat · 03-27-2010, 03:34 PM

Didn't Keith Lynch Run A Metric 200 or 250 something behind his 375 -- 396 B/SA with a steady diet of Royal Purple and it worked like a swiss watch? I think that it might have been a Scott McClay piece.

Chipper Chapman · 03-27-2010, 03:42 PM

350 with 250 shafts and drums, lightens them up almost 10 pounds, cut some off thepump so its a little less volume, cheap and effective. Told it can be worth over 10hp at the wheels with a small block, but haven't yet tested it myself. Don't worry about rpm.

03-27-2010, 09:01 AM	#1
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,424 Likes: 547 Liked 334 Times in 181 Posts	Re: Turbo 250 or 350 It is my understanding that a 350 has almost the same external dimensions as the Glide, uses 15-17 more HP just to turn the transmission than a Glide and a 350 weighs a little bit more than a glide(maybe 15-20 pounds) and you cannot use a 350 with an engine that revs over like 7000 rpm( they want to self destruct). BUT you do get that extra gear in there!!! Now a Metric 200 has the lite weight of a Glide, you can spin the engine well over 7000 RPM like a glide , it takes about the same amount of HP to turn the trans as a Glide AND you get the benefit of the extra gear. Its weak point is UNLESS it is really beefed up it will self destruct on its own at low RPM , in a heavy vehicle, in normal everyday street use that's why GM stopped using them. Unless you are looking to extract the last thousandth out of your car--you do not either want the hassle of the maintainence or have the ability to do trans work you might be better to go with a 350 til you hit that plateau in your level of performance where you feel you could use the extra gear that both transmissions over---Comp 387

03-27-2010, 09:29 AM	#3
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,424 Likes: 547 Liked 334 Times in 181 Posts	Re: Turbo 250 or 350 Bill---every one has their success story---yours is one of them---I'm by no means any kind of an expert on 200 vs 350 transmissions---Only that not very many if any of the Comp guys are using a 350----lotsa proflites /glides and some 200 but only ony guy I know of is/has been using a 350 and he is doing the R&D as a test vehicle for a racing trans company we all know---Comp 387

03-27-2010, 10:40 AM	#4
Kenny Wigington Senior Member Join Date: Sep 2004 Location: Cumming,Ga. USA Posts: 967 Likes: 36 Liked 60 Times in 12 Posts	Re: Turbo 250 or 350 I have been very pleased with my TurboAction 200. Paul, in my opinion, is the man for those ! __________________ 2894 STK

03-27-2010, 12:04 PM	#5
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,132 Likes: 1,596 Liked 1,909 Times in 427 Posts	Re: Turbo 250 or 350 Nope, a 350 will not explode at RPM in excess of 7000. I've built them since 1984, and never seen one explode, and that includes a lot of race transmissions. Nothing explodes like a TorqueFlite!!!!!!! __________________ Alan Roehrich 212A G/S

03-27-2010, 03:34 PM	#6
Caperat Junior Member Join Date: Jun 2006 Location: CANADA Posts: 76 Likes: 0 Liked 0 Times in 0 Posts	Re: Turbo 250 or 350 Didn't Keith Lynch Run A Metric 200 or 250 something behind his 375 -- 396 B/SA with a steady diet of Royal Purple and it worked like a swiss watch? I think that it might have been a Scott McClay piece.

03-27-2010, 03:42 PM	#7
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	Re: Turbo 250 or 350 350 with 250 shafts and drums, lightens them up almost 10 pounds, cut some off thepump so its a little less volume, cheap and effective. Told it can be worth over 10hp at the wheels with a small block, but haven't yet tested it myself. Don't worry about rpm. Last edited by Chipper Chapman; 03-27-2010 at 03:44 PM.