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Old Oct 3, 2007 | 06:55 PM
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Default Twin turbo

hi everyone,

I am looking into installing a twin turbo and intercooler in my 78. looking for anyone that may have done this or any info that may help.
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Old Oct 3, 2007 | 09:45 PM
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Do a search of posts from Monty, he did one of these a while back.

Last edited by shafrs3; Oct 3, 2007 at 09:48 PM.
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Old Oct 3, 2007 | 09:47 PM
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Hope you're handy with fabrication, tig welding, and have barrels full of cash
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Old Oct 3, 2007 | 09:53 PM
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Like G daina said....Welcome
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Old Oct 3, 2007 | 11:28 PM
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I have the turbos and all the piping, just need to find the best place to mount the turbos with the least modefictions to the hood and or engine compartment. Then can start fabricating the pipes and find a place to put the intercooler so the engine will not overheat. Thanks for the feed-back. Keep it coming!!
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Old Oct 4, 2007 | 01:03 AM
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Originally Posted by shafrs3
Do a search of posts from Monty, he did one of these a while back.
Molobo, I can't remember Monty's web page, do a search in the archives....lots of good info with tons of photos
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Old Oct 4, 2007 | 03:03 AM
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Here is one thread. You can start here. . http://forums.corvetteforum.com/show...ighlight=Turbo Here is another. http://www.twinturbocorvettes.com/ Search is your friend. And after you look do you really wish to do that lol. Things are a tad tight in there.

Last edited by SHAKERATTLEROLL; Oct 4, 2007 at 03:06 AM.
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Old Oct 4, 2007 | 08:59 AM
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You might consider a rear mount configuration, you should be able to keep your A/C with rear mounts if that's a priority.
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Old Oct 4, 2007 | 09:13 AM
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Here is one some guy did.

http://s73.photobucket.com/albums/i2...ngthevette.flv
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Old Oct 4, 2007 | 11:22 AM
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Originally Posted by molobo
...find a place to put the intercooler so the engine will not overheat.
Curious about this statement... Intercoolers have nothing to do with engine temps.
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Old Oct 4, 2007 | 11:32 AM
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Originally Posted by JoeRags
Curious about this statement... Intercoolers have nothing to do with engine temps.
Caught by a keen eye. This is true, the intercooler works to lower the temperature of the charge going into the engine. Its especially important in turbocharged applications, due to the extreme heat involved in driving the turbos. Although, I bet there is some sort of implication to having a cooler, denser charge, related to the overall engine temps.

Other than that, good luck, I actually came across a twin turbo 350 locally recently and was really interested until they started talking about the hole that was blown in the block. Obviously, built it for the boost you're looking to run and remember the bottom end will be the tell-all to a successful turbo project.
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Old Oct 4, 2007 | 12:06 PM
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oops sorry.

Last edited by Stewart's74; Oct 4, 2007 at 12:21 PM.
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Old Oct 4, 2007 | 02:24 PM
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Originally Posted by JoeRags
Curious about this statement... Intercoolers have nothing to do with engine temps.
Yes and no. A proper installation should allow lower exhaust temps via lower intake charge temps, but a poor installation location in front of the radiator may cause higher coolant temps if radiator airflow is substantially degraded.
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Old Oct 4, 2007 | 03:16 PM
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Originally Posted by 69427
Yes and no. A proper installation should allow lower exhaust temps via lower intake charge temps, but a poor installation location in front of the radiator may cause higher coolant temps if radiator airflow is substantially degraded.
Agreed.. but in the sense of the original post, he/she was implying that an intercooler will help lower engine temp and prevent overheating. EGT and coolant temp are two totally different beasts here...
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Old Oct 4, 2007 | 03:19 PM
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Originally Posted by my72vette454

I would like to see a pic of the front wheel wells above the wire where the air intake tube is routed and what it looks like. Does the tire ever rub on it when actuated fully?
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Old Oct 4, 2007 | 06:25 PM
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What I was referring to as far as intercooler and engine temps, is that C3's and for the most part vetts in general have more limited ram air for radiator cooling and in my case would like to keep my A/C condenser in place. So if installing an intercooler in front or behind the radiator it stands to reason there would more restriction of this ram cooling air plus the added heat from the heat exchange process and increased HP might cause the engine to run hot. Thanks again for all your help gents.

Mo
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Old Oct 7, 2007 | 10:43 AM
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Just saw an episode of Hotrod TV featuring a Gale Banks bolt on system for SB that looks like it could fit in a C3 nicely. The displayed system was shown with a front mount serpentine setup.
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Last edited by shafrs3; Oct 7, 2007 at 10:50 AM.
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Old Oct 7, 2007 | 10:47 AM
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Originally Posted by shafrs3
Just saw an episode of Hotrod TV featuring a Gale Banks bolt on system for SB that looks like it could fit in a C3 nicely. The displayed system was shown with a front mount serpentine setup.

Was it a stock GM serpentine system or an after market like March or Zoops?

I'll have to do some searching for that setup.
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Old Oct 7, 2007 | 10:52 AM
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DB, the site states it's a CNC machined package so it must be his own design.

http://bankspower.com/twin-turbo-system.cfm
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Old Oct 7, 2007 | 06:01 PM
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Originally Posted by JoeRags
Agreed.. but in the sense of the original post, he/she was implying that an intercooler will help lower engine temp and prevent overheating. EGT and coolant temp are two totally different beasts here...
I've been running a turbo engine for the last dozen years. Trust me, I know the difference between EGT and ECT. However, you are neglecting the difference in thermal loading on the cooling system between an intercooled and a non-intercooled engine. An intercooled engine will have a lower intake mixture temperature, which, for a set number of fuel BTUs added during combustion, will result in lower combustion temps (and a smaller thermal gradient and resulting heat flow from the cylinder through the walls into the coolant), and also the heat transfer through the exhaust port walls into the coolant.
Yes, they are two totally different beasts, but they are not independent in their interaction.
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