Biggest injector on stock ecm

TireFryer

The new kid..
Going e85 soon. Have a dw300 pump. I have 80’s but I don’t think those will be enough with e, can I run the turbotweak 95’s? What would a dw300 and 80’s be capable of? I’m getting new fuel lines as well. Can you run 120’s on stock ecm? Goal would be a 11.0 car. At the max. I could go a 450 pump if needed. Gotta spend that open house money…
 

TTA308

Active Member
I think 120's are most you can go w/stock ecm, I am using 120's and a DW400 but for my goal I am almost out of pump... but that should be good for 11.0 with room to grow.
 

TurboTGuy

Gray Beard Member
I'm running a set of Eric's flow matched Siemen's 80's, stock ECM, Joe Telesca's DW 450 single fuel system set up, Champion Fuel Rails (not needed, but purdy), swapped the return line, and a Turbo Tweak chip to match the injectors, 91 and Alky.

10.5's all day long and I'm not stressing her even a little bit.

Your fuel pump is the weak link. Not the injectors.

Plenty of folks here running 120's & E85 going fast.
 
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TurboTGuy

Gray Beard Member
That's what I THINK he told me, but I'm old, infirm, and don't remember so good... :p

In any case, it's a work of art!

I'll be talking to him tomorrow, I'll ask.
 

TireFryer

The new kid..
Does Eric sell 120’s? Is there a specific impedance or part number I need to look for? I know nothing about injectors
 

6gunn

high on gas fumes
Injector Dynamics 124s here on stock ECM with Erics chip and a 525lph pump. Duty cycle is about 50%, but I'm on pump gas. Idle is somewhat rich until the motor warms up, then it is just about stoich. My current combo was run on E85 by the previous owner(hence the big injectors). They are honestly too much for me running with pump gas, but were part of the deal so I might as well use them.
 

dynoman

Well-Known Member
120's are low impedance injectors and need a modded stock ECM . That's what I currently have in my car , but I'm switching to a Holley HP & 220 injectors shortly .
 

TireFryer

The new kid..
120's are low impedance injectors and need a modded stock ECM . That's what I currently have in my car , but I'm switching to a Holley HP & 220 injectors shortly .
What exactly is a modified ecm? Where do I get one? Want to sell me the ecm and injectors lol
 

TType85

Well-Known Member
The high-z 125's TT sells are nearly double the price of the low-z ones. Best off getting a modified ecu and the low-z injectors
 

dynoman

Well-Known Member
I checked and the Injector Dynamics injectors ARE high impedance so you DON'T need a modded ECM to run those , but Eric would still need to burn a chip for them
 

dynoman

Well-Known Member
What exactly is a modified ecm? Where do I get one? Want to sell me the ecm and injectors lol
Bob Bailey would modify the driver circuit in the stock ECM to handle the increased current draw low impedance injectors create .
He doesn't mod them any more . I'll have my spare modded ECM available after I switch over , but the one in the car and injectors are spoken for at this point .
 

'87 Turbo "T"

What a shitshow!
What exactly is a modified ecm? Where do I get one? Want to sell me the ecm and injectors lol
I think TT is out of stock of 120#’s currently. Could always post to see if someone has a modded ECM in the parts wanted.

Sam is correct. I don’t think Bob is modding ECM’s anymore. The 95’s are pricy BUT you won’t have to mod the ECM.
 

TTA308

Active Member
I'm running a set of Eric's flow matched Siemen's 80's, stock ECM, Joe Telesca's DW 450 single fuel system set up, Champion Fuel Rails (not needed, but purdy), swapped the return line, and a Turbo Tweak chip to match the injectors, 91 and Alky.

10.5's all day long and I'm not stressing her even a little bit.

Your fuel pump is the weak link. Not the injectors.

Plenty of folks here running 120's & E85 going fast.
What is your IDC and are you logging FP ?
 

Mr.Spool

Well-Known Member
Going e85 soon. Have a dw300 pump. I have 80’s but I don’t think those will be enough with e, can I run the turbotweak 95’s? What would a dw300 and 80’s be capable of? I’m getting new fuel lines as well. Can you run 120’s on stock ecm? Goal would be a 11.0 car. At the max. I could go a 450 pump if needed. Gotta spend that open house money…
How about run your 80s and keep your alky to run 11.0.
There have been bigger injectors high impedance on the stock ecm.
No need for anything that big on an 11.0 car.
Contact eric and discuss your goals
 

TurboTGuy

Gray Beard Member
Pretty sure I got the last ECM Bob modified. I remember when he returned it to me he said he wasn't doing any more. I think that was just before COVID.

I did it as a back up. No, I won't sell it. :)
 
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