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tvis ir no tvis
Posted: Wed Mar 26, 2008 10:53 pm
by ga_goosh
i just got my 86 running and the new motor i put in has the tvis removed does the stock 4age have more power with it on cuz i have every thing and i am wondering if i should put it back on thanx
Posted: Wed Mar 26, 2008 10:56 pm
by CBR_TOY
i've heard it's good to run because it gives the motor the low end torque it's supposed to have.... just hear say though.
is it disconnected or removed?
Posted: Wed Mar 26, 2008 11:13 pm
by ga_goosh
it is removed but i have everything to put it back on and i have heard that same thing so i guess im going to put it back on
Posted: Thu Mar 27, 2008 7:51 am
by nt66
yeah its good to have on a stock or mildly modded 4ag it helps a lot with low end power
Posted: Thu Mar 27, 2008 11:47 am
by dr.occa
essentially, what happens with the tvis plate removed is the runners are all open thereby creating less velocity at lower rpms. power is there but higher up. the tvis plate acts similar to the way primaries and secondaries open on carburetors: progressively
Posted: Thu Mar 27, 2008 7:41 pm
by H8S
Posted: Thu Mar 27, 2008 7:44 pm
by Nasser
you can undo a vaccume line underneath it and plug up the hole and itl leave all the butterfly valves open all the time and try it out for yourself.
Posted: Thu Mar 27, 2008 8:23 pm
by nt66
yeah but that would hurt low end torque and not change top end at all
Posted: Fri Mar 28, 2008 10:37 am
by dr.occa
but no low end rick...
you would have already been making 103 anyway. ima cut you!
Posted: Fri Mar 28, 2008 11:43 am
by nt66
yeah tvis makes no diffrence above 4000 rpms it just makes the curve the top better when I dynoed my car it made a straight line all the way top the top no tvis cars make a really low line untill after 4000 then they climb to to power
Posted: Fri Mar 28, 2008 12:46 pm
by Native
well i took my butterflies completely out. i also took the vacume mechanism out aswell. i never started the engine up to find out what it did, (ran out of money for the car).
but i was anxious to see what would be effected. i also cut the middle wall splitting the runners, that way it wasnt restrictive. How ever i do think this setup would have been better for a turbo app. but i decided to go na for a while seeing how i ran out of funds lol.
i pretty much made it a large port out of a stock motor.... lol
Posted: Fri Mar 28, 2008 2:24 pm
by nt66
stock motor is a large port oh and it wouldnt have done much just hurt acceleration below 4000 rpms
Posted: Fri Mar 28, 2008 4:37 pm
by Native
well i keep it above 4k all the time lol, yeah i launch it at 4k.
Posted: Fri Mar 28, 2008 4:59 pm
by dr.occa
Native wrote:well i keep it above 4k all the time lol, yeah i launch it at 4k.
i lunch at Taco Bell
Posted: Fri Mar 28, 2008 5:21 pm
by Native
lol ^^^^^^^^
F TIVS 103HP ON A STOCK 4AGE NO TIVS