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Old 12-28-2007, 07:28 PM   #151 (permalink)
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PLus tube and fins flow like crap internally. THey use them for diesels because cooling it off completley is not nessecary, its cheap, and diesels don't flow a lot of air, due to rpm constraints.

Not all Diesel truck intercoolers flow like crap. CFM wise, my 6.6l turning 2500 rpms at 28 psi of boost is moving air and cooling. The inlet temp rises to ~300*F and outlet in the 145* F range, under the above conditions.

A 2.0 turning 6300 at 18 PSI isnt close to the cfm of my diesel truck when towing hard. The additional rpm does not offset the additional boost and displacement of the truck.

By the way, the IC in my truck would look funny sticking out of the hood of the Solstice.

Of course 900 ft.lbs and 500 hp at the rear wheels would be more fun in the Solstice.
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Old 12-28-2007, 07:47 PM   #152 (permalink)
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A little diesel in our car would kick beans! If it was well thought out, revved to say 4500 (not easy to do,diesel flamefronts propagate slower) and made 260hp/500tq/50mpg cruise it would be a seriously fun alternative to gas.
The chassis would be a great flagship for it.

GM lurker's Give us half a Duramax to choose from as well! Use literally half the components, saves alot of development and help you sell it to the bossman.

Could you guys imagine double the torque @2200rpm?

Last edited by BaldTurboFreak : 12-28-2007 at 07:50 PM.
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Old 12-28-2007, 10:06 PM   #153 (permalink)
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260hp/500tq/50mpg cruise it would be a seriously fun alternative to gas.
As long as I can put in a 5" exhaust and have it sound like a semi, I'm all in.
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Old 12-29-2007, 04:58 AM   #154 (permalink)
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There seems to be about a THOUSAND different tubos out there. What turbo did you end up using, and why?
We haven't had this car even a month yet, and I all ready know that I want to go to a larger turbo and beefier engine parts. You said something about a different intake manifold, also?
Where is the best place to get aftermarket parts for these cars, like the valve springs, pistonies, etc?
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Old 12-29-2007, 09:42 AM   #155 (permalink)
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I plan on using a least 4 different turbos (Wife allowing,lol) The one that is currently on there is a GT3076R with a .63 a/r Tial SS housing that has been cut up and refabricated to work with the stock turbomanifold and a Tial 38mm external gate. I also have welded a flange to the compressor housing to allow the stock elbow to bolt back on. The heat shield fits as well and hides the inverted gate.

I chose this as the starter for to 500hp and up crowd, as it's a proven performer on 2.0's for street/strip. I have faith that this turbo is going to shock even me with it's boost threshold in this app.
The GT35R is "outline interchangable" that is physically bolts in the place of the externally gated GT30's. But it too will require a reworked TialSS housing to bolt on to the ecotec turbomanifold.
The 35R has put 2.0's into the 10's and with more than 600hp on tap you'll be thinkin of forged pistons and Darton kit when you get to the limit of this turbo. But mind you it's just as happy making 300, so dont think a bigger turbo isnt going to have great low boost performance as well.

Rounding out my insanity I'll tig a 16ga 321stainless tri-Y and stick a GT4094R on there. That one I wanna try in two configs
- Tial SS housing in small A/R
-Garrett split tangential and Im going to shut half of it (the exhaust housing) off with a Tial 44 set @8psi with a master Tial set @22psi. I've done this before on a rearmount and it's functional for at least 3-400rpm off the boost threshold.


Going back the other way I plan on putting a internallygated Gt3071R with a 2.75" inlet.
It appears that the top 2 studs of the KO4 flange arn't that far off T-28. There is a strong possibility of an single plate adapter solution, but I make no promises until I put it together. That would garuntee the stock DP would work. at least from a concentric point of view.
If I can pull the singleplate adapters off, any t-28 flanged turbo can be used.
The internally gated turbos will have a Bosch bypass valve built into the compressor housing and the flange welded to the compressor for the stock elbow as well. I want the internally gated turbo's to be a turbo only swap. No maf swapping,exhaust changin' none of that. These biggest of the T-28 flanged turbo's, the GT3071R-WG,will max out @475hp and will make a low 12 second car, other hardware permitting.


As far as the intake manifold goes there are plenty out there, you'll just have to either plug the fuel rail or use them for alky injection (megasquirtanyone?)

But Ive got a hankerin' to try a dissolving buck (no not $$ but Ironically that too) mold.
Thus far to make 3D parts,we have used the CNC to make 2 piece molds from MDF and either lay them up in 2 pieces or roll the carbon around the inside and blow a bag up inside it. It's very time consuming.
A dissolving buck mold uses either styro (messy) or plaster to do your layup over the top of. Then vacuumbag,postcure and use either MEK,Acetone (for styro) or plain old water for plaster (prefered,more greeen friendly )
The results,if done correctly can be stunning. Superior runner dimentions, finish and a 7lb manifold that can take 50psi and 400deg. (it's all in the epoxy used)
like this one i found on the web

Thats the kind of manifold I tentivly have cookin on the back burner. I beleive it will have the 1000hp garret WIC core inside the plenum. It's very effective at resolving cyl/cyl issues @ high flow rates.


One thing I'd like to add for eveyone to consider. ALL of these turbos, even the 800hp GT4094 is within the realm of the factory PCM.
It's opsystem recognizes up to 912g/sec stock! For those of us that have had FI gm cars before and werent aware of that fact go ahead and do a around the laptop.
Everyone else: that means the MAF wont "maxout" and cause a code when the mods get crazy, and the PCM is capable of understanding and properly fueling the 80lbs/min are going thru the motor.

Now with that statement goes this disclaimer - It needs to be fully unlocked by HPT to take it to the limit and I am, so far, unaware of the true limitations of the stock fuel system. I bet the Gt30 or 35 is going to reveal what that is.
I do know that step 1 to solve it will require a MSD BAP..

Last edited by BaldTurboFreak : 12-29-2007 at 09:48 AM.
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Old 12-29-2007, 11:02 AM   #156 (permalink)
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"But Ive got a hankerin' to try a dissolving buck (no not $$ but Ironically that too) mold."

hahah Lol, now THAT's! humor!

Thats some nice postin there m8.

Stock fuel limits? I theorize 320-340 whp.

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Old 12-30-2007, 05:26 PM   #157 (permalink)
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That looks like big bucks Bald. I take it you have to vacumm bag. Will you make a mold or a one off?
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Old 12-30-2007, 06:15 PM   #158 (permalink)
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The prototype will be a one-off. If it works the way it's designed I will make a MDF master to make the Plaster bucks for production.

I ahve also been contemplating Carbon fiber endtanks for Intercoolers. I had built a prototype CAC that didnt survive the thermal cycling. Turns out the laminating resin I was using wasnt ideal for that temp range. I think Im ready to try again, this time armed with a resin specifically for bonding to aluminum in high stress/thermal loads.
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Old 12-30-2007, 08:06 PM   #159 (permalink)
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Murphy's Law eats it. No way around it you'll be getting a new oil feed line.
But I guess 3 out of 4 isnt bad.
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Old 12-31-2007, 06:58 PM   #160 (permalink)
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Okay,
moving right along turbo is back on the car, all lines except the oil feed are in place. Charge pipes are all hooked up, havent decided where to put the MAF element just yet.
Upper part of downpipe is installed, I need a ballsocket flange to finish the job out on the hotside.(no cat for now).
As soon as I make up the -4 line and change the oil I can fire it up and hear it bark.
I think Im just gonna put the Bosch BOV on it for now. The godzilla just looks so rediculous no matter where I put it. I should stick it in the nose of the car,hidden.
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Old 01-02-2008, 12:54 PM   #161 (permalink)
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BLow through. That is all.
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Old 01-02-2008, 03:16 PM   #162 (permalink)
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Stock fuel limits? I theorize 320-340 whp.
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Ill guess 336 HP
Not that I understand the math and physics BTF and Beau know but I thought that 93 Octane would cap this out quicker than other variables...Nice to see I am not crazy!
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Old 01-02-2008, 11:21 PM   #163 (permalink)
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I'm basing my estimation on several things. However I HOPE my speculation is wrong, and that the limitation will not be the rail pump.

The technical papers that i've read stated it is possible I am wrong. If this is typical GM fashion the fuling should be adequate to +75% of the original output. But, in this case its possible the mechanical pump since it is NOT made by GM could be the limiting factor.

But I've said this from the beginning, this car eas designed to be modified from the factory. Don't let the ECU fool you, Gms intention wasn't to have this thing make our lives miserable, they just needed a control unit that was sophisticated enough to control their beast.

The good news about having a ECU like this is that it prevents people from doing stupid things to the motor, and blowing them up and making the vehicle seem unreliable.

Like we were with the Grand Prixs back in the day. People were machining the snout to put smaller pullies on it, with an Air filter, colder plugs and a cat back, and were wondering why we were grenading motors left and right.

Now with the right work done, by people who do things right, the stock bottom end made it into 9.0X Pretty impressive.
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Old 01-03-2008, 08:47 PM   #164 (permalink)
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Have you looked into the wastegates? I believe you were going external? Any manufacturers in mind?
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Old 01-04-2008, 12:31 AM   #165 (permalink)
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I know you already have the Gozilla bov, but have you ever looked at the bov's offered from HKS, Apexi, or Blitz? I wouldn't use Greddy, I've heard of too many problems with those.
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