G35 Forced Induction questions

[stealthy]

I'll start off by saying, this is my first post and Ive enjoyed what I've read on here thus far. I've got a pretty good knowledge for turbo hondas ( I own a boosted/built Integra GSR that will soon be tuned for about 450whp), however I would like to get a G35 towards the end of the year after I sell my current car.

My main questions are:

1. What mileage is too high?2. What rwhp is a SAFE and RELIABLE stopping point on a stock VX353. Single or twin turbo?

Im a turbo guy, so no supercharging for me. I would like to have about 400whp for a daily driver, so reliability is a must. I would also like to keep the motor stock. Is this feasable? What are the limits on these motors and what is considered "high" milage, or a point of I-shouldnt-boost?

I did indeed search around, but came upon nothing of help. Thanks in advance!

[superchargedg]

The safe limit with a good quality tune done by someone who knows the vq35 well is about 400rwhp and it depends on what trans you have with the rwt.I can rec you a real good shop in your neck of the woods if you want.

[stealthy]

The safe limit with a good quality tune done by someone who knows the vq35 well is about 400rwhp and it depends on what trans you have with the rwt.I can rec you a real good shop in your neck of the woods if you want.

ok great, so 400rwhp is safe. im looking for a manual trans. and im sorry, but what is rwt?

what shop do you have in mind?

[superchargedg]

Rwt is rear wheel torque.

[stealthy]

i should have known that, haha.

thanks for the email, ill be looking into performance factory.

im still trying to see the pros/cons to single/twin turbo setups

[joe603]

A single turbo and a centrifugal supercharger are basically the same, just driven by different forces. A twin turbo setup will build boost much faster, which will give you max TQ/HP early in the powerband. Single compressors will need time to spool to build max TQ/HP.

I've heard good things about performance factory in Orlando.

[CYO44Baseball32]

I've heard good things about performance factory in Orlando.

+1

[C-Kwik]

A twin turbo setup will build boost much faster, which will give you max TQ/HP early in the powerband. Single compressors will need time to spool to build max TQ/HP.

A twin is not that much better at spool than a single. At least not conceptually. Turbo sizing and overall set-up will have a much more profound effect on the shape of a boost curve. It may be that in the kits provided for the VQ, the twins may offer better spool, but it is not inherent of being twin or single that is as much the issue.

Here's an article that really doesn't have much technical info, but shows a dyno comparison of a twin vs single with similar engine set-ups:

http://www.turbomagazine.com/t....html

For those too lazy to read through it, here's a photo of the dyno:

[stealthy]

the way i see it, a PROPER sized single turbo can be nearly as effective as smaller twins, and still retain power up top. that dyno chart is pretty close, i doubt you would notice much of a difference between the two setups.

in my past honda experience, ive built my own kits and is what i also plan to do for the G. until convinced otherwise, i will probably do a single turbo, as it seems it may be a bit easier to piece together, however i will still be doing more research on this.

[C-Kwik]

A single turbo would simplify some of the hardware aspects. I'm not a huge fan of having to run 2 wastegates, let alone 2 turbos, especially when the intake manifold isn't separated for each bank of cylinders. Presents more difficulty when troubleshooting. Of course, the challenge in a VQ for a single turbo set-up is the plumbing.

Without much serious thought into it, I have thought about the possibility of swapping the factory manifolds to the opposite sides of the motor (the ports look symmetrical but I'm not sure if it would fit correctly). If space were to allow (accessories like the PS pump or A/C compressor might be too close), it could simplify some of the plumbing in a single turbo set-up and reduce the distance of piping between the exhaust ports and the turbo. Doing so could allow one to retain use of the factory cats as well.

If there was enough space, which I don't think there is, I'd shove the turbo between the radiator and the motor as well. Especially down low where a police officer or even a smog tech might miss it.

[MUNNNJEE]

there is no real guide line in terms of what mileage you should apply FI to your car...there are some who do it even at 70,000+ miles

for a stock block i would say keep it 400hp or lower with low boost just because you run the risk of putting a hole in your engine. there are ppl who are running big numbers but its just a time bomb before something happens.

its encourage to build your engine if you want to make bigger numbers

read this...this will tell you everything you need to know

http://g35driver.com/forums/fo....html

happy boosting