If you have a built bottom end (sleeves, pistons, rods), why do u stop upping the boost. I was trying to figure out why most people i see with built motors boost 15-25lbs, with the majority between 15-20. I guess the question i'm trying to ask is, if the motor is built to handle 30-50lbs why only boost 15-25? Is it a fuel system drawback? Turbo gets inefficient? Would take to long to build that much boost? I wanna hear why you don't boost more.

 

id like to know too!

 

traction?

 

i would assume guys with that much boost are on at least a 25" slick at the track but hell even that would probably spin. good point

edit: i think boost level is kinda irrelevant its more about amount of power being made.

 

i think the reason is most cars are everyday street cars and they build the bottom end and tune it to take the boost but only run a larger amount of boost at the track(15-25psi). traction is an issue yes. but once you push that much psi you would run a bigger turbo than your average t3/t04 which 60% of the members here have. also youd need huge injectors and fuel pump. another thing is pushing that much power breaks stuff really easily. (axles,transmissions,ringlands,sleeves) all that psi is usually reserved for race cars. although there are cars here that push that. again tuning is the key for anything and once you push that much psi there is a small window for error

 

I have a built bottom end right now and plan on getting a precision pt67 turbo. When I have the thing totally completed and installed, sure I could up the thing to about 35psi easily but on a street car setup I would do nothing but spin tires down the track even with 24-26in slicks never mind the fact that the efficency drop isn't worth it and it has to pass emissions in order to keep tags on it. Its not about how much power you can make, its all about how much usable power you make.

 

well i know that traction would be a problem but some people have two different boost setting for the 1/4. Like for instance, 12 lbs for the start the up it to 19 at about the 1/8 or so. Would traction really be and issue that far down the track?

 

your sleeves may handle 35-50 psi. but show me a piston/rod combo that will hold on a daily basis.

w/that much psi youd be making 800-1000+ hp. i know someone making 560whp on 23 psi, he only stopped cause his injectors maxed out.

 

for the traction probleme would it be a good idea to make a setup in wich you can use both boost.

I know their's a thing (don't know how to name it) that when you hit a switch the 2nd boost you have pre-setup is on, so you may have 30psi of boost and run with the switch off at 15psi. the idea witch I have no credit cause i've read it somewhere, would be that you start he 1/4 mile or race with that boost, until you have all your traction turn the switch and get all the boost for the end of the race/ 1/4 mile.

it can be like a second turbo mode

 

Traction is the biggest problem I see. If you have 550whp you can't put to the ground why even have that much power?

 

its a dual stage boost controller

when u start boosting over 30 there are alot of new problems that arise..heat being one of them...another is fuel...u need garden hose size injectors

 

some high end turbo cars themselfs sometimes have to dump boost to gain traction..if you want an example ill show you one just hit me up on AIM jdmstokeless619 its a perfect boost dump vid

 

If its built to handle 50 PSI, yes it will handle it, but every day for how long? I want to get some miles out of my motor, thats why I wont run crazy boost. The money was spent building it so it will last, not so I can blow it up off of one 50 psi run.


Rob

 

It cost a lot of money to drive around on c116 octane on a daily basis?

 

lol, kind of a stupid question imo.
just think about it.
build it to last for many years boosting 20 psi or build it to last for a week boosting at 50 psi.

 

um the chances of you being able to run that much power on pump gas is

 

for me..i would build to run higher boost..but also more for peace of mind.....assuming that TUNING is up to par....If i had a built bottom end..i would probably only run 10-15lbs of boost anyways...For me..i would do it more for the peace of mind....

Khoi

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb18c &raquo;</TD></TR><TR><TD CLASS="quote">It cost a lot of money to drive around on c116 octane on a daily basis? </TD></TR></TABLE>

 

I'm not talkin abot boosting that much on a daily basis, my question was mainly talking about at the track y not boost more.

 

everyone here knows that there is more to power than boost. my car makes 372 whp at only 9 psi that is my limit on pump gas. on race gas ill boost 25 psi but i have a hell of a fuel sys. we haven,t tuned it at this boost level yet but we speculate 500-550. i run an aeromtive ar 1000 pump -8 feed line - 6 return and 1000 cc injectors. its still a street car i mean full interior sound system the works. and a speed pro ems. yes i can run 35-40 psi on my darten sleeves but will my fuel system keep up? i dont know only time will tell

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by romeo619romeo &raquo;</TD></TR><TR><TD CLASS="quote">some high end turbo cars themselfs sometimes have to dump boost to gain traction..if you want an example ill show you one just hit me up on AIM jdmstokeless619 its a perfect boost dump vid</TD></TR></TABLE>

post post post post post!!!11

-ryan

PS, sorry, got a little excited

 

pump gas and traction.

 

Rings! Pistons!

 

boost = timing... too much timing = detonation... you can only run so many psi on pump gas.....

 

cuz I want it to last more than 10 runs