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TurboCharged 2.5
Posted: Tue Dec 14, 2004 2:56 pm
by nvenuto
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.
Posted: Tue Dec 14, 2004 9:55 pm
by junglejustice
Single turbo, 8.5:1
GoTech or other....
Posted: Wed Dec 15, 2004 12:56 am
by Mats
What kind of Mitsu turbos?
Posted: Wed Dec 15, 2004 5:54 am
by nvenuto
not sure the numbers but they came out of a 3000gt vr4
Posted: Wed Dec 15, 2004 5:55 am
by nvenuto
twin turbo setup
Posted: Wed Dec 15, 2004 5:59 am
by 4SFED4
Nvenuto,
What is your goal for the car and have you thought of a budget?
-Brian
Posted: Wed Dec 15, 2004 7:36 am
by enzo
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...
Posted: Wed Dec 15, 2004 9:42 am
by 81GTV6
I like turbos for aircraft, not so much cars.
Superchargers are much better suited for cars.
Posted: Wed Dec 15, 2004 1:55 pm
by otter
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
Posted: Wed Dec 15, 2004 2:19 pm
by nvenuto
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.
Posted: Wed Dec 15, 2004 2:29 pm
by Mats
2k??
Can you even do a proper rebuild for under 2k?
Posted: Wed Dec 15, 2004 2:34 pm
by 4SFED4
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
Posted: Wed Dec 15, 2004 3:11 pm
by nvenuto
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?
Posted: Wed Dec 15, 2004 3:12 pm
by nvenuto
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?
Posted: Wed Dec 15, 2004 4:41 pm
by Zamani
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.