ALFAGTV6.COM

nvenuto · Post by **nvenuto** » Tue Dec 14, 2004 2:56 pm

OK I have my engine completely in pieces and finished inspecting all the bottom end components and now I'm suddenly thinking of turbocharging. I have to replace my pistons anyway so what I was thinking was to lower the compression to around 7.5:1, keep the existing rods, bigger valves, same cams (any ideas???), Bigger injectors, I currently have two mitsu turbos, megasquirt. Just wanted to get an idea from everyone what they think before I go in face first. Thanks Alfisti.

junglejustice · Post by **junglejustice** » Tue Dec 14, 2004 9:55 pm

Single turbo, 8.5:1
GoTech or other....

Mats · Post by **Mats** » Wed Dec 15, 2004 12:56 am

What kind of Mitsu turbos?

nvenuto · Post by **nvenuto** » Wed Dec 15, 2004 5:54 am

not sure the numbers but they came out of a 3000gt vr4

nvenuto · Post by **nvenuto** » Wed Dec 15, 2004 5:55 am

twin turbo setup

4SFED4 · Post by **4SFED4** » Wed Dec 15, 2004 5:59 am

Nvenuto,

What is your goal for the car and have you thought of a budget?

-Brian

enzo · Post by **enzo** » Wed Dec 15, 2004 7:36 am

if someone of you want, I can post the callaway user manual for the GTV6....the quality of the images is not very good, but you can make an idea...

81GTV6 · Post by **81GTV6** » Wed Dec 15, 2004 9:42 am

I like turbos for aircraft, not so much cars.
Superchargers are much better suited for cars.

otter · Post by **otter** » Wed Dec 15, 2004 1:55 pm

there is a massive amount of really good info on this in the old forum, look in performance, the subjects called turbocharging and v6 twin turbo are the best ones, IMHO

nvenuto · Post by **nvenuto** » Wed Dec 15, 2004 2:19 pm

My goal for the car is 300 Hp and budget is around 2K if I choose to go down this route. I have been looking for a 24v 164 engine but have had no luck. I figured since I already have 2 turbos and am in the midst of building a megasquirt, that a setup is not going to be that bad but since I have never done it before it sounds like a challege. Please post the manual enzo I would love to see it. Thanks all.

Mats · Post by **Mats** » Wed Dec 15, 2004 2:29 pm

2k??

Can you even do a proper rebuild for under 2k?

4SFED4 · Post by **4SFED4** » Wed Dec 15, 2004 2:34 pm

Nvenuto,

I agree with Mats... while it could be done... I am not sure I would want it when it was.

By no means do I want to take any wind from your sails... best of luck to you. Knowing you options before you start is a good approach.

-Brian

nvenuto · Post by **nvenuto** » Wed Dec 15, 2004 3:11 pm

Mats-
you make a good point. I neglected to say that I have already done the cylinder heads and done all new bearings. Since I can make my own manifolding I figured 2k was a good figure for pistons, rings, any machine work etc... What do you think?

nvenuto · Post by **nvenuto** » Wed Dec 15, 2004 3:12 pm

Mats-
you make a good point. I neglected to say that I have already done the cylinder heads and done all new bearings. Since I can make my own manifolding I figured 2k was a good figure for pistons, rings, any machine work etc... What do you think?

Post by **Zamani** » Wed Dec 15, 2004 4:41 pm

I think that is not adequate for 300bhp with good power curve.

I haven't turbocharged anything before but from what I've read, to get the most power per lb of boost, you need to spend a lot of time building a good exhaust manifold (the details like, length, collector shape, etc are important), cams to match, intercooling, fuel and ignition mapping. You have MS, but you still need a better way to control spark advance besides the stock BOSCH ignition module.

The pistons alone may cost you $800. My J&E pistons cost $890 after discount (with rings, pins, clips etc).

I think with a log manifold and basic intercooling and if you just turn the dissy (retarding), 225 bhp should be achievable. I could be wrong though.

TurboCharged 2.5