how to build a strong th350
#21
Originally Posted by TopspeedLowet
Originally Posted by BEAST477
Originally Posted by ARUSSELL
I have a Pro Trans 350, all billet internals, spragless hub, kevlar clutches, reybestos bands, not sure who makes the transbreak valve body, but running in is a 565 Dynoed at 1150 hp and 3400lb car. NEVER missed a lick
Then again this engine my have dual carbs with a small NO2 plate Beast?
Bruce
#22
Senior Member
DYNO OPERATOR
Join Date: Apr 2008
Posts: 504
Horsepower shmorsepower, This is what mine made
I have ran the 556" combo myself with similar results that your friend had Beast477. As a comparison of power, my 582"tall deck,12 degree Profiler headed, cast ported profiler intake with near 15 1/2 to 1 comp using a 6 cc dished piston ( due to the small comb chamber) and Jesel 1.75 ratio rockers and .922" lift at the valve with Pac #1349 springs with 1064# on the nose and 375# on the seat requiring 7/16" push rods. I run a single 1400cfm Dominator on gasoline that makes 1170 uncorrected HP at 7450 RPM and 924 # torque from 5600 RPM to 7100+ rpm. Steve Schmidt & company ported the heads and gave me the valve train combo ( I would have never arrived at this answer on my own or budget) a few years ago. We run real fast with our TH 400 trans with a 2.10 first gear ratio. The stock 400 2.41 ratio is too much ratio at this power level on the starting line to hook it up easily.
Bruce
Bruce
#23
Senior Member
RACING JUNKIE
Join Date: Feb 2004
Location: san antonio, texas
Posts: 1,233
i upgraded to a 400 and sent it to hughes transmissions and they
installed a race kit w/transbrake for $1,250., the guy told me it
would handle up to 1000hspwr, i'll be lucky to push out 800,
but they cleaned it painted it and it arrived looking brand new :wink:
installed a race kit w/transbrake for $1,250., the guy told me it
would handle up to 1000hspwr, i'll be lucky to push out 800,
but they cleaned it painted it and it arrived looking brand new :wink:
#25
Senior Member
RACING JUNKIE
Join Date: May 2006
Posts: 2,044
Originally Posted by JEFF69Z28
Why not,they are lighter,and i was told they build rpm faster than a 400.if it works it works no reason to switch.
The only people who run T400's instead of T350's have never ran a glide before, well maybe a few but not many.
#27
Senior Member
RACING JUNKIE
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,391
Well.... I have a confession to make.
I have a TH350 behind my BBC (hey, it came w/the car). Fact is, it has served me well so far. I have been concerned with constant abuse however. I like that it is lighter & easier to spin, but I do believe I need TH400 & I am exceeding the HP for my application by 50HP according to my trans guy. I figure I will see how she does, then go 400 after that. I wonder if I will need to modify/change my x-member & drive line for the TH400???
I have a TH350 behind my BBC (hey, it came w/the car). Fact is, it has served me well so far. I have been concerned with constant abuse however. I like that it is lighter & easier to spin, but I do believe I need TH400 & I am exceeding the HP for my application by 50HP according to my trans guy. I figure I will see how she does, then go 400 after that. I wonder if I will need to modify/change my x-member & drive line for the TH400???
#28
Senior Member
RACING JUNKIE
Join Date: May 2006
Posts: 2,044
Originally Posted by Rigsby
I wonder if I will need to modify/change my x-member & drive line for the TH400???
The output shaft is bigger too so you'll need to swap yokes out on the drive shaft.
Goodluck, Cp
#29
Senior Member
DYNO OPERATOR
Join Date: Aug 2005
Location: Rifle Colorado
Posts: 585
A 400 is longer overall so you have to get the driveshaft shortened and a 400 slip yoke. Also, you'll need to move the crossmember back to mount it up. Personally, I'd go with a glide.
Johnny
Johnny
#30
Senior Member
RACING JUNKIE
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,391
Thanks John & CP.
For pure bracket racing, I agree.... the PG is best. I just love to be busy & shift a little more... as it is a street car more than a drag car.
I have notched the X-member already for a larger pan... so it may work already. The driveline change, yoke, & new x-member placement sounds like all I need according to what you guys said. I just had the driveline re-done too!! I swear these things are bottomless pits!!! Should have switched the 350 then.... oh well.
For pure bracket racing, I agree.... the PG is best. I just love to be busy & shift a little more... as it is a street car more than a drag car.
I have notched the X-member already for a larger pan... so it may work already. The driveline change, yoke, & new x-member placement sounds like all I need according to what you guys said. I just had the driveline re-done too!! I swear these things are bottomless pits!!! Should have switched the 350 then.... oh well.