4A-GTE 7-rib smallport

[nyberrg]

Hey!

Researched the posibility to turbo a smallport but all the threads I found were about bigports or GZE engines. The higher compression of my smallport surely must make a difference.

I'm toying with the idea of putting a small turbo​ on my 4age (maybe 6-8 psi boost). I read that 7m-ge/gte injectors fit the 4age and provide more fuel than stock injectors. Will the stock smallport ECU handle the bigger injectors or would I need a piggyback/standalone?

Would the engine hold up with a small amount of boost or is it not an option on a stock smallport?

Any info is appreciated!

[d3nso]

Everything you found about turbo conversion of bigports can applied to smallports. The higher CR makes a difference but if your tune is done right isn't it much of a problem.
This leads to the ECU. The stock ECU doesn't like boost so piggyback or standalone ECU would be needed. I would go standalone, not a fan of half assed piggyback setups
7MGTE injectors do work like every others which are +300cc.

[nyberrg]

(05-22-2017 12:44 PM)d3nso Wrote:  Everything you found about turbo conversion of bigports can applied to smallports. The higher CR makes a difference but if your tune is done right isn't it much of a problem.
This leads to the ECU. The stock ECU doesn't like boost so piggyback or standalone ECU would be needed. I would go standalone, not a fan of half assed piggyback setups
7MGTE injectors do work like every others which are +300cc.

What about the stock ECU would be the issue? I know it's pretty stupid, but I want to do a turbo as kind of a budget upgrade!

[d3nso]

The stock ECU isn't designed to handle positive manifold pressure nor to handle such big injectors thats why you should go the standalone route. And yes doing a Turbo setup on a budget is not the best idea

[nyberrg]

(05-22-2017 10:47 PM)d3nso Wrote:  The stock ECU isn't designed to handle positive manifold pressure nor to handle such big injectors thats why you should go the standalone route. And yes doing a Turbo setup on a budget is not the best idea

It is probably the most cost effective way to gain power though!

[krullibull]

Don't bother with stock ecu and anything but small upgrades. At the very least get a Megasquirt or even better a ECU Master. Nothing is cheap when you're tuning