built motor?

toner123

Hey guys lately I have been debating to start building my motor to make it more FI friendly. Not wanting to start this tomorrow but maybe next winter is when I am going to want to do it. Well I find myself in unfamiliar water and was wondering what I would need to do. I would like a motor that could handle about 700hp to the wheels just in case I ever want to go up a little more from where i am at now in power. I understand that I would need pistons, rods and a crank to lower the compression, but what about the heads? Would I need to get head work done, new valves, and would a VVEL controller be necessary? Never really did anything like this so any help would be appreciated.
Frank

Scott @ RA

We have done countless motor builds primarily for FI, on a variety of VQ based engines. With that said, you or your motor builder will need a host of parts, including but not limited to new forged rods, lower compression forged pistons, bearings, gaskets, seals, bolts, studs, etc. A crank would not be necessary unless you intend on changing your displacement (which I would advise against), the VQ family of cranks are very hearty and have shown to be capable of withstanding upwards to 800-1000 HP and over 12,000 rpm without a problem.

SPOHN

Best thing to do is contact a reputable shop. Most have package deals that support this amount of power. Pretty straight forward. Except for the cost,lol. Head work with that much HP would have to be done. You really don't need that much HP IMHO. 500 to 550 is more than enough. Saving you more dough. Or to help add with more supporting mods.

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370z TT

There's a 12,000 rpm VQ motor? How do they make it rev that high when the engine can barely make 8k rpm?

SPOHN

That is high. I've seen with stroker kits going alot higher revs, like in the 9's and above. But I wouldn't doubt it can't happen or has.

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toner123

Now I have the walboro 255 fuel pump and 600cc injectors. Would they be able to handle up to the power I asked or would a new system be required. Also would a piggy back system be required? I know I have a lot of questions, would hate to get involved and then get shut down because i was over my head.
Frank

toner123

I understand what your saying and thats where I am at now. I would just like to make the motor more FI friendly where I never have to worry about the boost I am putting in it will one day cause damage. I also look at it if I am going to do it i should give a little more room for growth and just spend the money once because if i ever want to get more it is going to be like paying double.
Frank

SPOHN

Fuel pump will work along with a return fuel system. I would defiantly have bigger injectors (1000). I also would get a stand alone engine management. Which is costly. A rough estimate for a built motor and FI will be 15k plus with supporting mods. Look at GTM website to get a idea of what's needed. Plus nothing is guaranteed with a build and boost.

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Mr.Squeeze

For 700 Whp you would need a twin pump set up ang bigger 800CC should do it and return fuel system.

toner123

I did that already and found it not to be so helpful lol. I know they offer complete engine builds and I only seen one that was a stage 1 VHR the rest were 35HR. Also it didn't tell you what else you would need to make it happen. I don't know what other supporting mods that you mentioned I would need other then fuel return and the piggy back.
Frank

SPOHN

You could need a bigger radiator with fans with those power levels. But maybe not. But it does help to have. Better clutch, oil cooler, LSD (IMO), and some others. Not sure of what you have as of now such as exhaust and such. There's alot to it. Start looking up other people's duild and see what they have. There's such that can be said.

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toner123

I have everything you mentioned already from when I added the turbo kit.
Frank

I know this may seem like a stupid thread but something never really discussed on the forum and one day I am really going to want to do this and it would be nice to have a idea of how it works so some shop doesn't take me for a ride.

Scott @ RA

Yes, the fuel system would have to be addressed as well as the injectors would have to be upgraded significantly again for this sort of power you are talking about. Not to mention a list of other stuff.

Like what was stated previously, 700whp is a LOT of power and overkill for any street car. The amount of money involved in this project as well as the maintenance and upkeep involved on a daily or even a weekend driven 700whp VQ car is painstaking. Might want to re-consider your goals a little. 500-600whp is MORE than enough for a street car and is a more realistic goal as far as maintenance and reliability. I'm sure you are wanting to enjoy your car more, not maintain and worry about it more.... LOL

toner123

Ok I didnt think there was that much more of a head ach if you built the car to take that power level. So if i stayed in the 600 area my injectures and fuel system would be fine except for possibly having to purchase a fuel pressure regualtor or something. Like i said I am not trying to be speed racer and i definatly need no more then 600 to the wheel just figured if I was going to build something for that to maybe spend a little more and give me some wiggle room
Frank

SPOHN

Ok I see what boat your in. Yea defiantly a fuel system(injectors, return system)and engine management for starters. The motor is straight forward for your going to have a certain type of setup for those levels. I agree with Scott also. Plus at the time you get involved you will need to see if the turbo's might need to be rebuilt also while there off the car.

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