Stroker Combos
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Pro
Joined: Nov 2003
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From: Peabody Ma.
Stroker Combos
What makes a 406 ? ect My buddy has a 406 that seem to have way more torque than my 350 w/ a TPI. Could I bulid similar set up out of a 350 that would also work with the TPI? Tia
Race Director
Joined: Jun 2000
Posts: 10,039
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From: FL
A 406 has 4.155" bore and 3.75" stroke. A 350 has a 4.00" bore and 3.48" stroke. The 406 will always have more torque than 350 due to the increases stroke. Just a fact of life.
You could build a 383 stroker out of the 350 (.030 overbore and 3.75" stroke) but that involves new crank, rods, pistons. Like saying goes though, there is no replacement for displacement.
You could build a 383 stroker out of the 350 (.030 overbore and 3.75" stroke) but that involves new crank, rods, pistons. Like saying goes though, there is no replacement for displacement.
Race Director
Joined: Apr 1999
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From: CORVETTE 77 385 C.I. TEXAS
406 is a bored 400. Torque depends on C.I., if C.I. is similar then stroke,
for example when Chevy went to a smaller V8 than 350, they could have used 302, 307 or 305 easily & used 305 because it has the longest stroke (from 350).
for example when Chevy went to a smaller V8 than 350, they could have used 302, 307 or 305 easily & used 305 because it has the longest stroke (from 350).
Race Director
Joined: Dec 1999
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From: Forked River NJ
Another 406 combo which is a little more difficult to build is a 350 block with a 4 inch stroke in it. It takes a lot of clearancing and the fit is extremly tight but a 4.030 X 4 inch stroke nets you a 406 also.
Drifting
Joined: Aug 2004
Posts: 1,883
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From: Lubbock TX
I don't think a TPI will feed a 400 with good heads. I understand you can replace the runners with bigger ones and get some more revs, but you'll still be limited on the top end. It would probably be a torque monster, though, with those long intake runners.
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Pro
Joined: Nov 2003
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From: Peabody Ma.
I know the TPI came from 305. FWIW the current set up produces good torque, however that 406 is a real animal! I was hoping that someone had some sugestions to get some torque, and use my existing set up. Am I wrong in saing a 383 is a high rev engine? Cause I know the TPI is done @ 4500ish RPM
Racer
Joined: Dec 2008
Posts: 300
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From: Toms River NJ
how high you can rev depends on your cam and your heads. If you want some more power out of your current setup, pick up a super ram or stealth ram setup. both will give you more rpm and overall power, plug into your existing electronics and fuel system, even use your existing throttle body. you need different fuel rails for the stealth ram tho.
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Racer
Joined: Dec 2008
Posts: 300
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From: Toms River NJ
over a stock tpi, definitly. go onto thirdgen.org and do a search for it. there are lots of builds and even some dyno sheet comparisons. a lot of those guys swap out their stock tpi manifolds for something with shorter runners and a larger plenum. LT1 and LT4 manifold swaps are common too. and TPI Specialties makes a Miniram manifold thats pretty good. there are a good number of options, and that board has a lot of info. try asking on the c4 board too. im sure some of those guys will have some insight for you.
Pro
Joined: Sep 2009
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From: columbus ms
with a stout motor, you would easily gain 75 hp on top end. you will lose some torque but the torque curve will be flat with a mini ram type intake. my 327 tpi is done at 5000. even with good heads and cam (which i have) the 17" long tpi runners are done early. download compcams free engine data system and input your engine specs. then change the tpi to a mini ram type or carb intake and you will see how rpm restrictive the tpi unit is.i love my tpi set up but a mini ram intake is in the not so distant plans. on a big cubic inch motor a tpi would be a stump puller only.
