Stock Injectors

[TurboTJ]

Im about to rebuild my engine to solve crank walk. I plan on using DSM Link for fuel management. How much boost can i run with the stock injectors and how much can i run with the stock fuel pump if i put in new injectors? The Turbo and exhaust manifold will be upgraded to the 16G.

 

[droppinbottom]

Quick answer would be somewhere around 15psi. Every car is a little different and you should use some kind of logger to help you get your answer. Try not to go over 85% IDC

 

[TurboTJ]

So if I put in different injectors, how much boost can my stock fuel pump support?

 

[BlueTurboSpyder]

Dsmlink is a waste of money if you dont purchase large injectors to go along with it. With dsmlink, the car will run the same with 450s or 1600s. If you have the money to rebuild your motor and purchase dsmlink, I would opt for large injectors, walbro fuel pump, and a afpr. But, to answer your question, 14-15 psi would be about the max on a stock fuel system. I'm pretty sure your fuel pump will fall on its face before you injectors will so if money is that tight get the fuel pump before injectors. After that, save your money until you can afford larger injectors to go along with the dsmlink.

 

[TurboTJ]

alright. So it sounds like I should buy the biggest injectors I would ever want to run along with a fuel pump and afpr and keep the boost no higher than 14-15 until then.

 

[BlueTurboSpyder]

Yes, thats your best bet. You will not need a afpr if you go with a walbro 190 but you will if you go with a walbro 255. The problem with the 190 is you wont be able to take advantage of really large injectors if you get into heavy mods in the future. It'll max out in the low to mid 300s in horsepower. Good luck

 

[BOOSTJUNKIEGSX]

Curious about the rebuild... Maybe you should look into getting a 6 bolt verses rebuilding the 7 bolt.. It may set you back a little now but down the road you will be much happier. You can always use some parts for the swap and sell the rest.. Just for thought..

I was running 21 psi with stock intercooler/piping/FPR - Big 16g turbo , 550`s, 255lph and exhaust but its always best to go bigger because we all tend to become unsatisfied and we always want more..Looking ahead will save you money and there is always something you could use that money for

Goodluck with whatever you decide to do -

 

[TurboTJ]

what are the advantages of a 6 bolt? I'm kinda making something more for practical use than drag racing. I do a lot of travel in my car and my turbocharge jeep wasnt getting very good MPG and has terrible high speed handling.

 

[nightspeed87]

nothing really other than the fact that you wont have to ever worry about crankwalk, which a lot will argue that its overrated... I am currently in the process of a 6 bolt swap right now, and im building it up a little ( and I have 2g pistons in it )
but im not swapping just because its a 6 bolt so its a different story...
But since you have a 2g maybe there is benefits to using the 6 bolt motor because the 1g motors have bigger tb, intake manifold, head ports, bigger and stronger rods ( 6bolts only/ no crankwalking on these ) and the best feature of all the 1g4g63 has the 14b turbo which is hella better than the puny stock t25 on the 2gs, so youd get a better more potent turbo out of it all to ( hopeing its in good condition when it came with the engine )
But your 2g has better pistons (compression), better mass air flow, better exhaust manifold as long as you port it bigger, and is newer therefore less work needed to it most likely....

I dont know what your power goals are, or how much your looking to spend, but
If I were you personally ( since im more a fan of 1g when it comes to performance) Id get a 6bolt 1g engine, and put your 2g pistons in it and your 2g mass and exhaust manifold, and then there you have the best of both worlds....
Just my opinion though....
( Also depending on the cost, because some will argue the 6bolts swap also depending on what kind of deal and cost your going for because if its going to cost too much more than it wouldve just to build your 7 then just add that extra money to the 7 and fully build it up, and there you have a brand new built 7 bolt and even if you were unlucky enough to get crankwalk youd still have to put some hard miles on it first and who knows you might not even have your dsm another 40- 50thousand miles anyways right. I mean you figure the averge person doesnt put anymore than 12, 13 thousand miles a yr, so do the math... )