putting together a tt

[ontherun300zx]

i need sum help putting together a 3.0l to a twin turbo and still looking for all the right s***. i found the exhaust, the manifolds and front mount intercooler. all of'em kits to peice togeter but still looking for a tt kit for close to 400hp+, thats the part ima need the help on. looking for a kit less than 4 grand or all together with an intercooler and pipeing. thz for the help.

[car nut]

Do you mean you're trying to bolt on turbos to an NA motor?

[labcoatmonkey]

\

Do you mean you're trying to bolt on turbos to an NA motor?

I think it would be easier to make 400 hp on a turboed NA motor because of it's higher compression. It means running at about 10 PSI id say... with the stock 25's. Then again turboing a stock motor is a risky way to go that might set u back more money than intended.

[evildky]

there si nothgin wrong wiht tueboign the n/a motor but it needs to be tuned properly, the problem is that 99% of the tt's otu there are runing stock or off the shelf chips, that beibng said, sell the n/a and buy a tt, you'll thank me later

[vulcanrush]

\ I think it would be easier to make 400 hp on a turboed NA motor because of it's higher compression. It means running at about 10 PSI id say... with the stock 25's. Then again turboing a stock motor is a risky way to go that might set u back more money than intended.

i don't think this is true.

higher compression is bad for boosting, that's why the 300zx tt is 8.5:1 instead of the 10.5:1 for the na.

if you have a 350z, for example, just using the vq35de as an na engine and would like to turbo it, you'll see that the turbo pistons are 8.5:1 also.

[car nut]

i don't think this is true.

higher compression is bad for boosting, that's why the 300zx tt is 8.5:1 instead of the 10.5:1 for the na.

if you have a 350z, for example, just using the vq35de as an na engine and would like to turbo it, you'll see that the turbo pistons are 8.5:1 also.

It's not bad, it is just less stable. Like evildky said, the most important part is the tune.

And I don't really see what you're saying with the VQ35DE. People boost them all the time, and the stock compression ratio is 10.3:1 in a 350z.

[vulcanrush]

how much boost do they run on vq35de's?

i don't think too much, right?

i was looking at some turbo pistons for them, cp's for example.

"Made in 96mm or .020 overbore and 8.5:1 Compression which works best for Turbo and Supercharged 350z's."

i'm sure people boost their stock z's...but 3-5 psi?

[car nut]

i'm sure people boost their stock z's...but 3-5 psi?

They're probably good to 12 pounds with excellent tuning and fuel management. 3-5 pounds doesn't make forced induction worth it.

[vulcanrush]

They're probably good to 12 pounds with excellent tuning and fuel management. 3-5 pounds doesn't make forced induction worth it.

first, full disclosure, i'm no expert.

understood, which is what i meant, it's not worth it to throw a turbo onto an engine unless you're going to turn up the boost.

i have a vq35de, and i wouldn't run 12 lbs with stock internals. i've heard of some guys who run like 10 lbs, though --- but i'm pretty sure they have more of a budget than i do.

maybe i'm just conservative, but i would get a new set of pistons first.

Modified by vulcanrush at 8:16 AM 3/26/2010
Modified by vulcanrush at 8:17 AM 3/26/2010

[car nut]

Haha me neither, I just try and read as much as I can to make sense of things. That VQ thing was just an estimate (I'd say 10 pounds sounds like a reasonable boost ceiling for a car with that c/r).

I agree with you on the boost thing, but I don't think you really need to build the motor to make high horsepower before you turbo it. These days, Z's are very unique in that they come from the factory with the ability of making 600hp on the stock block. Most other guys boost their motors until the reach the limit before ripping them apart.