Another Turbo build up
Another Turbo build up
Today, I'm starting my build.
I've started by doing the hard part - getting out the visa and ordering parts.
GT2871R turbo
Vulcan Turbo exhaust manifold
60lb injectors
SC delete kit from ATP turbo
Hahn Racing oiling kit (feed and return)
My intent is to use the stock intake manifold, and relocate the throttle body on to it. So it will be facing forwards, instead of off to the side as it is on the supercharger. I'm going to have Perrin Performance build me an intercooler, that sits in the same place Bolus' does. So, I will have dual charge cooling - air to air, and then air to water. Should be pretty effective.
I chose the GT2871R turbo after doing some research, and seeing some others results. 20G - too laggy for me. GT3071R - better, but still a little laggy, and I'm not looking for 400whp+. My goal is little to no lag, 350-375whp... and the GT2871R turbo should fit the bill nicely.
This also keeps me from having to do anything too crazy with the fueling. No return fuel line, no change in pump should be needed (I HOPE!), etc... And with any luck, the stock clutch will hold up at that power level as well.
As parts start to arrive over the next couple weeks, I'll be putting up pictures. I'll also have some parts for sale as well, and will be putting them up (2 different sets of injectors, my exhaust setup that's on the car now, supercharger, 2.9" pulley, stock Atom ECU, etc...).
Tentative build date is set at Jan 24th and 25th. The exhaust manifold has to be built, but I've been in contact with Vulcan turbo, and he's going to work with me to make sure I'm happy with his manifold.
I've started by doing the hard part - getting out the visa and ordering parts.
GT2871R turbo
Vulcan Turbo exhaust manifold
60lb injectors
SC delete kit from ATP turbo
Hahn Racing oiling kit (feed and return)
My intent is to use the stock intake manifold, and relocate the throttle body on to it. So it will be facing forwards, instead of off to the side as it is on the supercharger. I'm going to have Perrin Performance build me an intercooler, that sits in the same place Bolus' does. So, I will have dual charge cooling - air to air, and then air to water. Should be pretty effective.
I chose the GT2871R turbo after doing some research, and seeing some others results. 20G - too laggy for me. GT3071R - better, but still a little laggy, and I'm not looking for 400whp+. My goal is little to no lag, 350-375whp... and the GT2871R turbo should fit the bill nicely.
This also keeps me from having to do anything too crazy with the fueling. No return fuel line, no change in pump should be needed (I HOPE!), etc... And with any luck, the stock clutch will hold up at that power level as well.
As parts start to arrive over the next couple weeks, I'll be putting up pictures. I'll also have some parts for sale as well, and will be putting them up (2 different sets of injectors, my exhaust setup that's on the car now, supercharger, 2.9" pulley, stock Atom ECU, etc...).
Tentative build date is set at Jan 24th and 25th. The exhaust manifold has to be built, but I've been in contact with Vulcan turbo, and he's going to work with me to make sure I'm happy with his manifold.
Re: Another Turbo build up
One of the questions I've been asked by a number of people is "why"?
- price for hp. I intend on doing this full buildup for less than $1900. Exhaust work, intercooler work, turbo... everything. Obviously that includes selling some parts off to recoupe some expenses. One of the big pluses for me is that I don't have to pay for labor - just parts (and a case of beer). By my calcs, I'll pick up 80whp, for $1900 = $23.75 per HP.
- I don't believe the Harrop solution is a great solution. I haven't seen any dyno results worth talking about yet. 330whp.. and total cost out the door is close to $3000 (injectors, charger, custom fab work needed to make it work on the atom). I can get 270whp out of my car day in and day out with the stock supercharger - so you're going to pay $50 per horsepower for that upgrade... double the turbo.
Turbos have another great feature - more mid range power. By a superchargers very nature, you're not hitting full boost until redline. The faster you rev the engine, the faster the pulley turns. With a GT2871R turbo, I can hit 20psi of boost by 3500rpm!
- price for hp. I intend on doing this full buildup for less than $1900. Exhaust work, intercooler work, turbo... everything. Obviously that includes selling some parts off to recoupe some expenses. One of the big pluses for me is that I don't have to pay for labor - just parts (and a case of beer). By my calcs, I'll pick up 80whp, for $1900 = $23.75 per HP.
- I don't believe the Harrop solution is a great solution. I haven't seen any dyno results worth talking about yet. 330whp.. and total cost out the door is close to $3000 (injectors, charger, custom fab work needed to make it work on the atom). I can get 270whp out of my car day in and day out with the stock supercharger - so you're going to pay $50 per horsepower for that upgrade... double the turbo.
Turbos have another great feature - more mid range power. By a superchargers very nature, you're not hitting full boost until redline. The faster you rev the engine, the faster the pulley turns. With a GT2871R turbo, I can hit 20psi of boost by 3500rpm!
Re: Another Turbo build up
so is the manifold going to be custom? One issue with mine is getting the turbo to fit in front of the frame components.
Re: Another Turbo build up
I've spoken to the guy who runs Vulcan, and he assures me it'll fit. The turbo flange is angled down at 45 degrees, and after doing some measurements, we figure it'll fit fine. If it doesn't... I'll show him where it doesn't fit, and he'll build me a new one. His words are that its designed to put a turbo in a car with a firewall 9 to 10 inches away from the head of the engine. Well... I meausured the atom, and came in at 9 3/4" from head to frame rail.
Here is a pic of the manifolds.. he also offers an external wastegate option for an additional (minimal cost), but I'm not interested in spending the money on an external wastegate (another $225 or so).
We know there's a possibility it won't fit, but he's willing to work with me, on the short time frame I'm talking about getting this done in, so he's got my business.
Here is a pic of the manifolds.. he also offers an external wastegate option for an additional (minimal cost), but I'm not interested in spending the money on an external wastegate (another $225 or so).
We know there's a possibility it won't fit, but he's willing to work with me, on the short time frame I'm talking about getting this done in, so he's got my business.
Re: Another Turbo build up
Here is the fitting problem the stock hahn cobalt manifold had. It is very similar in shape to the one you are getting.
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Re: Another Turbo build up
Thanks for those pictures Bolus. I've sent them along to Vulcan, so maybe we can head off any problems ahead of time. He's estimating shipment to me on Friday or Monday.
Re: Another Turbo build up
Yeah, it will be hard to know the fit without the turbo right in there
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Re: Another Turbo build up
google images failed me. Looks like the housing is the same shape as mine so it is just a matter of if it fits in that space.
Since you are going to have the intercooler, have you thought about porting the intake manifold wide open to improve airflow? The cobalt guys are seeing some gains by porting suggesting some restrition from the manifold itself.
Since you are going to have the intercooler, have you thought about porting the intake manifold wide open to improve airflow? The cobalt guys are seeing some gains by porting suggesting some restrition from the manifold itself.
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