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TC78 + 390ci..........will it make 900 RWHP....?

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Old 12-18-2012, 10:07 PM
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You need to learn about turbos befor you drive a car with 1k whp. For even thinking of the words aes 390, tc78 and 900+whp. But you say your 390 is only to hold you off till you get your lsx 402 built means you have more money then brains or BIG dreams.

Search for the turbo 390 fire halk build on here from my buddy dischmitie (sp?) He's got one of FI's S88 and with 15lbs boost its all most traped 160 in the 1/4. Look in to some thing of that range
Old 12-18-2012, 10:52 PM
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Originally Posted by bad6as
You need to learn about turbos befor you drive a car with 1k whp. For even thinking of the words aes 390, tc78 and 900+whp. But you say your 390 is only to hold you off till you get your lsx 402 built means you have more money then brains or BIG dreams.

Search for the turbo 390 fire halk build on here from my buddy dischmitie (sp?) He's got one of FI's S88 and with 15lbs boost its all most traped 160 in the 1/4. Look in to some thing of that range
My ~500 RWHP car is utterly pathetic.........its no more exciting to drive than a mini van.

And I've driven 700-800 RWHP cars....not gonna have a problem.

1,000 will be fine.

If it wasn't for people with money to spend....every sponsor on this site would be out of business. NRE, LPE, Katech, etc......all out of business. I buy speed, I don't have to be an expert about every aspect of it. I fly jets worth $50 million with more systems and more power than any car will ever have......I only know what I have to know to fly it safely. Not how to build it or repair it or explain exactly how an individual component operates. Thats what those specialists are there for.

Dozens of cheeseballs said I was gonna kill myself in my ~500 RWHP car.

(((Just need help picking the proper turbo for my goals/needs....I'll handle the driving.....thanks..... )))

.

Last edited by LS6427; 12-18-2012 at 11:10 PM.
Old 12-19-2012, 10:40 AM
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Originally Posted by LS6427
My ~500 RWHP car is utterly pathetic.........its no more exciting to drive than a mini van.

And I've driven 700-800 RWHP cars....not gonna have a problem.

1,000 will be fine.

If it wasn't for people with money to spend....every sponsor on this site would be out of business. NRE, LPE, Katech, etc......all out of business. I buy speed, I don't have to be an expert about every aspect of it. I fly jets worth $50 million with more systems and more power than any car will ever have......I only know what I have to know to fly it safely. Not how to build it or repair it or explain exactly how an individual component operates. Thats what those specialists are there for.

Dozens of cheeseballs said I was gonna kill myself in my ~500 RWHP car.

(((Just need help picking the proper turbo for my goals/needs....I'll handle the driving.....thanks..... )))

.
Well said! Sounds like you have a fun job. Flying around jets is cool but probably stressful at the same time.
Old 12-19-2012, 11:45 AM
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I though the TC78 was "rated" for around 1000hp? Not wheel.
Old 12-19-2012, 11:56 AM
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A GT50 is a HUGE turbo and will not fit like you want it to. The only option you have is a PT88 based unit, and the PT8847 is exactly what I would use in your situation
Old 12-19-2012, 05:18 PM
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Based on your physical size limits a pt88 looks like your best bet. I'm actually going to be testing comp turbo version of a pt88 on Friday at speed inc. Il post up results on my 370.
Old 12-19-2012, 05:59 PM
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Originally Posted by engineermike
Furthermore, a rwhp number is absolutely no guarantee of actual performance.
Originally Posted by LS6427
...It is actually.
I can't even begin to describe how wrong your response is. It actually indicates you're kinda in over your head on this build.

Originally Posted by LS6427
I'm just saying...with my 390ci...E85....street car....A/C.....and with a single turbo-------I want to use a turbo that will make my car as fast as possible
If that's your goal, then the biggest turbo you can physically fit is the answer. That may be the TC78, but it won't make 900 rwhp through a 4L80E. Get rid of the space constraint and the answer quickly turns to a "thumper" T6 91mm or bigger. It takes some serious power to put 900-1000 to the wheels through that transmission. And, generally speaking, people who buy T6 turbos don't ask forums which turbo to buy.
Old 12-20-2012, 01:06 AM
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So.... you want to use the smallest compressor possible... push it all the way to the right on the map at max shaft speed... create a **** ton of heat...run NO intercooler and no meth....

You sir need to get a grip on reality and come back to earth with your unreasonable expectations of what its going to take to reach your goal.

No Ic, No meth... Fine....as long as you have a compressor big enough to move enough air mass without the shaft speed and heat getting stupid. This thing isnt going to be hapoy with 200-300 degree inlet temps. Yes they can get that high.

The first Caveat you need to make is meth. 1 precompressor nozzle would be enough to keep your IAT's in check with no IC.

2nd is turbo size. Theres no way in hell your doing this with a T4 framed turbo. PT88 included. You might as well buck up and get ready to fit a GT55 sized unit because i wouldnt even reccomend an S480 or S482 for this. Too many cubes. Easiest way would be a GT5518r.

Or go twins.
Old 12-20-2012, 01:31 AM
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Originally Posted by LilJohn
So.... you want to use the smallest compressor possible... push it all the way to the right on the map at max shaft speed... create a **** ton of heat...run NO intercooler and no meth....

You sir need to get a grip on reality and come back to earth with your unreasonable expectations of what its going to take to reach your goal.

No Ic, No meth... Fine....as long as you have a compressor big enough to move enough air mass without the shaft speed and heat getting stupid. This thing isnt going to be hapoy with 200-300 degree inlet temps. Yes they can get that high.

The first Caveat you need to make is meth. 1 precompressor nozzle would be enough to keep your IAT's in check with no IC.

2nd is turbo size. Theres no way in hell your doing this with a T4 framed turbo. PT88 included. You might as well buck up and get ready to fit a GT55 sized unit because i wouldnt even reccomend an S480 or S482 for this. Too many cubes. Easiest way would be a GT5518r.

Or go twins.
I always said WITH a FMIC and E85 fuel.


BUT.........I appreciate all your responses and input. I realized tonight after speaking with Robert (Modular Turbo) for a good 20 minutes on the phone.......his TT kit is the thing for me.....period.

5 months......it should be at his place in Miami getting started.

What an easy decision after having things put in perspective as far as cost verse performance.....vs DONE RIGHT.

.
Old 12-20-2012, 02:04 AM
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My apologies on the fmic part... for some reason i thought it said no fmic no meth.

Tell him to fit ya up with a pair of 6566's... and then go make 1200-1300 at the tire.

2000rata's car made awesome power with that kit. The best designed fbody kit on the market hands down. And to be honest you dont have to look much past the intercooler to make that determination. Everything past that is just icing on the cake.

Id love to see his kit with a 410+ inch motor and a pair of 7675's.... itd be sick.
Old 12-20-2012, 03:17 AM
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Originally Posted by LilJohn
My apologies on the fmic part... for some reason i thought it said no fmic no meth.

Tell him to fit ya up with a pair of 6566's... and then go make 1200-1300 at the tire.

2000rata's car made awesome power with that kit. The best designed fbody kit on the market hands down. And to be honest you dont have to look much past the intercooler to make that determination. Everything past that is just icing on the cake.

Id love to see his kit with a 410+ inch motor and a pair of 7675's.... itd be sick.
I'm hoping to do it soon.....its good that he's local to me.

.
Old 12-20-2012, 05:04 PM
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You mean the 10k kit? That's awesome and all but damn you have gone a long way in 3 pages. From a tc78 to a crazy twin kit. Good luck
Old 12-20-2012, 06:06 PM
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Originally Posted by SPRAYED 01
You mean the 10k kit? That's awesome and all but damn you have gone a long way in 3 pages. From a tc78 to a crazy twin kit. Good luck
Well, a single kit is what I wanted because everyone has always said its easier to package into our engine bays and keep A/C.......so that was my goal. But its been getting to sound like a larger and larger pain in the *** to find a proper sized turbo to meet my power goals and then to realize its gonna barely fit and a lot of fabbing and customizing has to be done. 25-30 hours of install costs alone......$3,000 for install alone.

And you know what......its gonna cost more than $10,000 in the end beyond the install costs.....A LOT MORE from what I hear.......

So for $10,000...which INCLUDES complete installation by them, why on earth would I not go for the Modular TT Kit. Why on earth would anyone not do it that wants to go BOOST.

I'm gonna do it........5-6 months and they can take the car.

.
Old 12-20-2012, 06:21 PM
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good call
Old 12-20-2012, 11:32 PM
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Ya good point. Good for you, hope it all works out. Make sure to post up results.
Old 12-21-2012, 09:40 AM
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I agree turbine is way to small for the CI, If your on a budget get look at the forcedinductions GT91 with the 97mm turbine wheel.
Old 11-19-2013, 10:06 PM
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this guy ever follow through with the TT kit?
Old 11-22-2013, 11:24 AM
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After reading this whole thread I would like to know too.
Old 11-22-2013, 11:52 AM
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Bummer to come to end and no results; Got allot of good info and scrappy replies.



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