Questiong on my setup

[JRSTANGE]

Soon to be anyway. It's slowly being put on the 1990 manual gsx since all the parts are here.

After doing some reading i was looking for some confirmation.

After reading some threads on 550cc injectors and a tdo6 20g turbo. Basically it was noted those 550cc's will get maxed out soon.

But, at what boost/hp level will they get maxed out at?

Basically I'm running a stock engine with the 20g, 550cc and a 255 walbro fuel pump. I'm needing to sell a few more parts off the last toy car to pick up the dsmlink. I need to still pull the ecm and make sure what work it needs to be able to run the dsm link and if it needs to be sent it or what not.

Basically I was looking at 16psi and i honestly have no other goal to push it past that as I want this car and setup to last. The last project just had to much down time as last it was down for 2 years.

Other supporting mods on this setup are O2 housing, 3" down pipe, Test pipe and 3" cat back. As well as a front mount intercooler and pipes with a ssqv. Of course a turbo intake also.

Tuning for me is not a problem been there and done that on piggy backs and other stand alones. But, with this setup on 16psi are those injectors going to hold up or am i looking at needing to go a bit bigger. Obviously 80% duty cylce or as close as posisble is what is desired.

Thanks for the help. Still working on learning and my knowledge of the dsm's.

Oh this is also going to be tuned using a innovate lc-1 with xd-16 gauge.

 

[Damills]

Your best bet is to go out and tune it...You mentioned you know how to tune so go out and make some logs start with low boost and work you way up keeping an eye on your duty cycles and gradual increase to your desired level. If you start reaching 80%-90% duty cycles pick up some different injectors. I personally would upgrade from 550's you will most likely be maxing them out pretty easy. But injectors are an easy swap and pretty affordable.

 

[JRSTANGE]

True, True. I was just trying to get an idea to save time and work. I'd rather work on sourcing the injectors now rather than later if people are positive they wont due.

So reading into your answer it sounds like the 550cc wont be enough for this turbo and setup on 16psi?

I previously ran these injetcors on the turbo saturn at 16psi on a similair turbo but, comparing apples and oranges dont do me alot of good. But, they were right at 80-90% duty cycle and good enough.

This is were my thinking is coming from. But, being the dsm is a new game i'm still learning is why i ask.

This project i want it right the first time around and have less to do tinkering later. Just so i can enjoy driving something again as a toy car.

 

[GSXSixteenG]

At 16psi, I would think you will be fine. But every car is different. If you are scared, source some bigger injectors. It's easier to compensate for bigger injectors then to make more than what you can out of the 550s. It will also give you a little room for when you are curious to about turning the boost up higher.

You may want to look into a adjustable fuel pressure regulator as well. Or a smaller turbo that is more efficient at lower boost levels.

 

[JRSTANGE]

Thanks, I appreciate it. I was thinking they should be fine but, I was doubting my self and looking for some confirmation.

I chose this turbo not necassarily for all out hp or anything of that nature or i would have gone bigger. But, I chose it to give me some room on driving out of the boost. Being others I've seen runnning the 14b or the evoIII 16g or similiar turbos they have near instant spool up. In the way I want to set it up I want some room for n/a driving to maintain some sort of n/a good gasmilage driving. Granted I want to have some fun but, this shold be a good mix.

Example on the a good friends evo8 from the stock big 16g it was near instant spool up and around town it was in the boost near all the time and gas mileage sucked. Granted there are other variables to this and how much throttle was applied and load etc... but, in time we installed a lot up upgrades to it and one being the gt35r with the new manifold and 60mm wastegate. The bigger turbo gave him a couple more hundred rpms with out spooling or going to boost. Granted it was a bit laggy but, he saw a noticable gain in gasmileage. But, his plans have since changed on his evo8 and he's finally buidling the engine to put that gt35r to good use for his goal.

But, I wanted something like that in terms with better around town driving with out always going into boost even if it is a psi, 2 or 3.

Thanks again.

 

[Damills]

I would go with at least some 680's or 720's to give you room to grow a little if you decide to get a little frisky with the boost controller.... or just like said above it is easier to compensate for too much fuel rather than not enough.

 

[JRSTANGE]

good deal, Thanks guys. I'll have to see what some larger injectors go for and what i can get for the 550's.

Right now also I'm not even going to install the greedy profec type s boost controller on it. I want to keep my self under control. So therefore if i want to turn up the boost on it I wont be able to. ! Plus i'm not a fan of manual boost controllers in the least. So really if i desired more i'd have to take a day to install the ebc.