Advice?

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cuda620

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advice from someone that knows... How much trouble and what size to run twin turbos on a blow thru carbed 360?
 
cuda620 said:
advice from someone that knows... How much trouble and what size to run twin turbos on a blow thru carbed 360?
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Lots of fabrication, lots of money if you want it to be built to handle the boost, not to mention the trans, rear etc.
 
dukeboy_318 said:
Lots of fabrication, lots of money if you want it to be built to handle the boost, not to mention the trans, rear etc.
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I gotta do a rear anyway,7.25 now. Tranny I knew. Not first forged engine I've built. Same stuff as if I put a Bigblock in it. Just no turbos.
 
cuda620 said:
advice from someone that knows...
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Just read some of the other threads... just pick your flavour.
Some have beefed up the engine, some basically run stock internals mit MODERATE amounts of boost.
Too much boost, wrong ignition timing, not enough fuel and your motor goes into shrapnel mode.
 
cuda620 said:
I gotta do a rear anyway,7.25 now. Tranny I knew. Not first forged engine I've built. Same stuff as if I put a Bigblock in it. Just no turbos.
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sweet, where in Indiana are you located?
 
My thoughts too. I thought it would be easier with 2 smaller twins..?
 
cuda620 said:
My thoughts too. I thought it would be easier with 2 smaller twins..?
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Add oversize heads, forward struts to handle more power, at least 2" headers, oversize radiator, w/ a shroud ! it gets tight. for you that don`t know, a hemi is way easier to work on than a big wedge.
 
I had a 68 notchback with a 440 that I put in it 30 years ago. Back then we did it the hard way. It's easier now. Back then it required a new K member unless you could fabricate. Which I did. I made my own mounts.
 
Im all for it but why twins? Adds more expense and plumbing. Lots of efficient single turbos out there.
 
In some areas it may be easier but you'll have twice the turbo oil feed and return lines, a Y pipe for the intake/intercooler that will merge the compressor pipes, exhaust plumbing for both turbos discharge, two turbo mounts that bolt to the block, two wastegates and the boost lines for those, two intake filters and cold air intake pipes for them, all the added exhaust flex couplings if you need them.

The only real thing that makes it simpler is not having to do a crossover pipe and merger for a single turbo and the passenger side header is a pain in general. I liked a single setup on fabo where he put the turbo right in front of the water pump and had the compressor face the intake. Looked pretty slick. Lots of different styles of doing things and your ride is a blank canvas. Browse around a lot and get the best game plan for your time and money.

My single turbo won't beat twins but I build boost around 2500 rpm in a 318 with a 62-1 turbonetics .84 a/r at high altitude.

If you're set on it, go for it, there's lots of folks here to help you out.
 
T56MaxTorq said:
In some areas it may be easier but you'll have twice the turbo oil feed and return lines, a Y pipe for the intake/intercooler that will merge the compressor pipes, exhaust plumbing for both turbos discharge, two turbo mounts that bolt to the block, two wastegates and the boost lines for those, two intake filters and cold air intake pipes for them, all the added exhaust flex couplings if you need them.

The only real thing that makes it simpler is not having to do a crossover pipe and merger for a single turbo and the passenger side header is a pain in general. I liked a single setup on fabo where he put the turbo right in front of the water pump and had the compressor face the intake. Looked pretty slick. Lots of different styles of doing things and your ride is a blank canvas. Browse around a lot and get the best game plan for your time and money.

My single turbo won't beat twins but I build boost around 2500 rpm in a 318 with a 62-1 turbonetics .84 a/r at high altitude.

If you're set on it, go for it, there's lots of folks here to help you out.
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Thanks! What do you think about a blower setup like Paxton or others like it? Any opinions?
 
Super chargers are cool. They're more basic which helps. Power comes on quick. High flow exhaust and an intercooler helps. They're a different breed however. They put a lot of strain on the crank snout so a quality forged crankshaft is a requirement. Preferably a crank designed for a supercharger if that exists. You could probably squeak by on <5 psi on a cast piece.
 
Hey T56MT,
Is there a picture of the single turbo set up that places the turbo in front of water pump?
Thanks!
 
clementine said:
Hey T56MT,
Is there a picture of the single turbo set up that places the turbo in front of water pump?
Thanks!
Click to expand...

Couldn't find it but it's in the forced induction back pages. I want to say it was a 408 or a 340.
 
Ok. Thanks. Im not to that point yet in project. Just scoping out ideas. Yknow...space....the final frontier.
 
The "turbo header pics" threads are really helpful. Also all the build threads because most go way in depth with lots of in-progress photos.
 
Ya those are super helpful. Im pretty sure the way you have a big single on passenger side is the way to go. Im still verifying compression ratio on an unknown rebuilt and changing cam. Hydraulic roller. Im thinkin 75-80mm with a 1.00-1.05 A/R for this street machine...Oh and its a BB. Have I gone out of the parameters of this thread? It does say "advice". Anyway, Im far away from this phase, this is an amazing place for information.

Thanks for reply.
 
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