Hey, i've done a "light" search but didn't come up with a definative answer. I'm pretty intimadated by the stock sequeal setup (vaccum hoses, etc.). If i were to get a small turbo and keep it at 10psi would there be a need to upgrade the fuel system? I'd just like to make the engine bay a little simpler. Thanks- Clayton T.

 

There really is no way of knowing without using an wideband O2, an A/F gauge and some testing.

Basically, *IF* the single you pick can flow the same CFM as the stock twins at 10 PSI, then there is no need for a fuel upgrade. However, that's a huge *IF* and the only way to know would be to use tools just for that to find out what's going on.

If all you want to do is make the engine bay simpler like a single setup, just conver to non-seq on the stock twins. Pretty much the same thing with a much smaller hit on your wallet.

 

sequential is intimidating, but you have some good mechanics around you to fix it don't you?

by going single and running low boost like that you'd also make the car slower and less responsive (less torque) by only boosting 10psi.

from what i understand, you'll at least want to do upgade the primary injectors using the secondary 850cc injectors.

 

Thanks guys.

 

Looked at your SIGs..
No mention of a ECU or standalone fuelmanagement.
Before you start doing the suspension and etc.. I would
1st. get a PFC w/commander 2nd a FUEL pump, with the
current MODS that you have.

to answer your SINGLE turbo questions:
first of all, I would get the BIGGEST turbo you can afford.
IE: bigger turbos work more efficient at any PSI level.
which means less heat. and Wouldn't worry about LAG.
Unless you drive like Grandmom, and if so.. SINGLE not for you.

and yes you would have to upgrade your fuel system.
FUELPUMP, FUEL pressure regulator, Fuel Rail and Secondary Injectors.

goodluck
BTW.. Go NON sequential

 

Huh?? If I'm not mistaken, the larger the turbo, the more air it takes to spool it, the greater the lag... That's why a smaller turbo like a T04 is quick spooling, but doesn't produce huge hp #s. A huge single like a T-78 would take a long *** time to spool, but could produce huge numbers.

 

No need for and ECU because the the psi stays at 10 and i haven't had a spike or boost creep yet (and this is after several WOT). I was going to buy a boost controller but Pettit assured me it wasn't neccasary. I trust Pettit's advice over anyone elses. Thanks for the concern though; hehe i'd hate to have you say "i told you so"

From what i understand a larger turbo takes longer to spool . . . . i'll do somemore reading, it's pretty much what i've "heard". Thanks.

 

I second Mahik.

FD Newbie and Apex, The larger the turbo the longer the spool due to the larger compressor and turbine wheels needing to be spun. The T-78 has huge a/r numbers therefore producing high numbers. A T04 is smaller in A/R trim creating less numbers at the same psi level as the T-78, though spools quicker.

Jeremy

 

Jeremy,

Thanks for the info. I was pretty sure that's how it was...

 

no problem

Jeremy

 

10 psi on a single is no where near the same as 10 psi on the twins, a single is WAY more efficient meaning alot cooler denser air, and the same psi.

 

Very true. A large single may not fully spool (making up numbers here...but lets say 26 psi) until 4200 rpm, but when it is making 10 psi, it'll be making a LOT more power than the stockers FULLY SPOOLED at 10 psi. That's simply because it's flowing so much more air (much larger turbo)

 

I was just asking all of this because i'm going to be stationed out of the country for about two years once i join the military. I'm going to save up and when i get back i'll prolly have $5000-10000 saved up and i'll apply for a personal loan (maybe i can get my mom to co-sign with me). I was thinking about Rotary Exteme V-mount and their $2900 turbo kit with a Apex-I ECU. Just wishful thinking i guess

 

just buy my T-88. That way you can have 500whp at 14-17psi and 650whp at 26psi. Yea, you will need a bunch of upgrades. But, you will runs 9s.

 

Haha, if you don't sell it in two years you have a buyer Good luck with your sale

 

who wants to make 650rwhp on an engine as big as a lunch box?

apex this thread seems kind of pointless...

 

Sorry Surgemonster, it is kind of pointless. My question has been answered but the thread keeps going

Like I said before, I just want to simplify the engine bay, I don't want a "650whp" car. I'll go to the Single Turbo section and read up. However, if there is anyone with a single who got it for making their engine bay less clutered please chime in and let me know what you did. Thanks- Clayton T.

 

I do.

 

nice bro!
I was shooting for the 475-500rw range and think I may be close have to go to the track and see.


apex like mahjic said if you go full non sequential that will make your engine bay about as clean as a single turbo setup everywhere else except for where the turbos are mounted. its real close and you could make some nice power without wasting a shitload of money on a single setup and then running it at 10psi when its made for high power/boost

 

this is what I did



first built a motor
then fabricated an aircraft engine harness
removed twin turbo's and air pump
put together a single turbo (.70 A/R comp. 4" inlet, 1.00 divided hot, p-trim, with a 60-1 wheel)
installed an electric air pump

once you go black...


oh and I run around terrorizing my town at 10psi with an open wastegate... YIKES!

 

Thanks Surgemonster. I'll read the non-sequential threads and see if that's for me. I was just attracted to the "small single turbo" because the spool up was comparable to the sequential set up (just what i've "heard").

Dubulup, WOW

 

thanks...haha!

I ran around last year with non-seq at 10psi...stock ecu (with piggy back), stock fuel and the car was fast.

If you seq, system is working properly, leave it be. Non-seq, doesn't get it as simple as I liked on the turbo side...lots of bends in piping, two intakes, etc...

I love the single look of the motor when you can easily see the LIM and all its rotary goodness

 

this is what i did............single greddy TD06

if you really want to clean up your engine bay, relocate all your electrical (fuses ect...) to the storage bin behind the drivers seat. not the easiest task but i've seen it done and it looks great and makes for a really clean engine bay.....not to mention, keeps all your electrical away from the heat

 

NICE

You got your work done at ASI right?