I'm making my some changes to my setup. I'm in the process of installing the F.A.S.T. EZ EFI 2.0 ecm in place of the factory 165 ecm. Currently I have 383 stroker, TPIS Mini Ram, Dart Pro1 180cc heads and Comp Cam adv dur 288/294; 236/242 dur @ .50 lift; 554/520 valve lift with 1.6/1.5RR. I'm planning to swap the cam for a Comp Cam 292/300 adv dur; 242/248 dur @ .50 lift; with 1.6RR making 619/ 614 valve lift . I'm not sure if I should I keep the dart heads or go bigger on the cylinder heads. I'm considering swapping the Dart heads with AFR 210 heads. Anyone with a 383 running the AFR 210cc heads? Are the 210cc heads too much or am I better off with the AFR 195cc heads? I'm looking for advice / feedback on the cylinder head choice.

 

Which Dart Heads do you have?

 

Dart Pro1 180 intake runners 64 combustion chamber 620 lift valve spring

 

Id keep that cam and do the afr head

 

Well, I installed the F.A.S.T. EZ 2.0 ecu, but it didn't work out as I planned. The cam (in my signature) that I currently have is too big and doesn't provide enough vacuum for the MAP to work as it should. So I pulled the F.A.S.T. ecu and wire harness boxed it up and put it on the shelf. So I brought the Holley Terminator X Max and installed it. I watched a few videos on navigating around the tuning program. Then I drove the Vette around town for a few day to get the learning data populating in the ecu and applied the learned data to the base fuel table and what a difference! One of many features of this ecu I like is that it will handle my next cam and cylinder heads upgrade which is waiting on the shelf. The Holley Terminator X Max self tuning ecu is AWESOME!

 

Hello I have a 1985 with vortec heads and a mild cam and BBK58mm Throttle body. I am looking to change the ecu as well. Do you have any build pictures or helpful hints. I have not looked at the Holly Terminator. I was considering the F.A.S.T. Ez but was also considering pulling off the intake manifold and going with a 4150 Carb / Holly Dominator ECU system instead.

What are your thoughts and why did you choose the Terminator other that what you have already stated?

Thanks,

 

As I stated before I went with the Holley Terminator because the F.A.S.T. ecu did not work with my cam. After seeing all of the capabilities of the Terminator X Max and the $1299 price tag it was a no brainer for me. I know in the future I will be replacing my transmission so I brought the Termnator X Max because this will give me the ability to swap my 700r4 to a 4L80e transmission. I didn't photo/ video log my install of the Terminator, but I did take photos of the finished install. Now as for your car, if you're looking to up grade your ecu, I would recommend the Holley Terminator X (terminator X max has a transmission controller), the F.A.S.T. EZ EFI 2.0 is a base entry ecu for cars with multi port fuel injection such as our Vettes and will handle computer controlled cams up to 276 duration. If you have a cam that's a 276 advertised duration or smaller the F.A.S.T. ecu will work, but the if you want to go to a bigger cam (280 or 288 duration) or add a boosted power adder in the future the F.A.S.T. EZ EFI 2.0 will not have the ability to handle boost it can only manage nitrous power adder. You would have to up grade to the F.A.S.T. XFI to handle cams bigger than 276 duration or power adders like boost. The Holley Terminator X will handle any size cam, boost and nitrous power adders. Both ecu's will work if you have a mild set up. I think Holley has a better suited ecu for the bucks. As for what you have in your engine setup, you don't have to swap your intake to a carb style fuel injection to use the terminator. If you went that route it will cost you something like $3500 in total for everything. The terminator (the one I purchased is part number 550-942) is design to plug in play to the C4 L98 TPI, mini ram, stealth ram, LT1 and LT4 intake setup for $1299 plus tax you can get the Terminator X Max and never have to pay a tuner to tune your car if or when you add performance upgrades to your engine. So my suggestion to you would be keep your TPI intake unless you're planning to go to a mini or stealth ram intake for better performance over the TPI intake. See which ecu fits your budget ; 1) Terminator X PN 550-936 $999, 2) Terminator X Max PN 550-942 $1299 3) F.A.S.T. EZ EFI 2.0 PN 30404 $1299 4) F.A.S.T. XFI Sportsman PN 30300 $1579 if you have more question just ask i'd be glad to help.
Ron

 

Holley Terminator X Max installed and now to drive and tune.

 

Just curious, how hard was the install or was it actually closer to plug n play?’Also do your gauges and stuff still work? Or does it get rid of the factory gauges?

 

This Holley Terminator kit ( PN 550-942) was 99% plug n play. I had to order adaptor plugs for the IAC, TPS, oil pressure sending unit, and for my dual sync distributor. The Holley terminator wire harness is built with LS style plugs except for the fuel injector plugs. They are plug n play to the C4. I didn't use my HEI distributor, because I had a F.A.S.T. Dual Sync distributor from the F.A.S.T. ecu that was already on my car. If you use your HEI distributor, you would need an adaptor to plug the HEI into the Holley Terminator wire harness. I got all the adaptors from Holley's website.
As for my gauges, Speedometer, Tachometer, fuel level, Oil Pressure Oil Temp, and Coolant Temp still works. The gauges that no longer work is the miles per gallon and instant fuel avg. gauge. This ecu doesn't come with a mounting bracket, so you would have to fab your own bracket once you decide where to mount it.

 

Hello Ron,
Thanks for posting the pictures of your install. I haven't looked into the Terminator X yet but will do so today as I have the time to research.

I'm so frustrated I just want my car to be able to get in and take a cruise or take it down the strip. I have already spent big $ getting the car to this point over the last several years. I have been extremely disappointed in the performance I have received using my current setup. I’m thinking that most of the issue is the original computer can’t handle what I’ve done to the engine. The Distributor is frequently coming loose and advancing or retarding the timing. Fuel Mixture is extremely rich. Throttle response is poor.I am willing to completely remove the current tpi setup to install anything that works.

Here is what I currently have.

L98 Build with original harness and CPU
Iron Vortec Heads 12558062 64cc 170
Scoggin Dickey TPI manifold
BBK 58mm Throttle Body
DUI 12611Bk HEI Distributor
Summit 1102 Hydraulic Roller Cam 0.296 Intake0.311 Exhaust
Melrose Long Tube Headers with 3" to 2.5" Borla Mufflers
Mild 700r4 Trans

Lately I have begun to consider the Edelbrock Pro Flo Xt complete system. Is the Holley Terminator X system as tunable or more tunable than the Edelbrock?
Will this control my overdrive in the 700r4? Are there detailed directions on how to wire this system into the existing harness?

Here are a few pictures of my engine. Thanks in advance for your advice.

 

That is awesome that the Terminator X is a pretty easy install. I plan on going that direction with my 85. I'd like to try and keep the MPG and Range functions working though, whether that means keeping the stock ECM for that or finding a way to emulate the info and send it directly to the gauge cluster.


As a note of caution, I do not think the Terminator X series ECUs are potted so they should not be exposed to the elements. This may not be an issue under the hood where you have it, but just something to be aware of. The Holley HP and Dominator ECUs are potted and can be put pretty much anywhere as a result.

https://www.holley.com/products/fuel.../terminator_x/