TPI to EFI
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
I don't recall any who have. However it is probably easier than going from carb. The stock wiring can be spliced for fuel pump and various other sensors I would guess.
Curious as to why?
Curious as to why?
Burning Brakes
Joined: Sep 2016
Posts: 1,133
Likes: 319
From: Ohio
Why? Have you ever used an aftermarket EFI system? Compared to the TPI stuff, its like going from standing arcade machine to expensive gaming PC.
Last edited by JoeNova; May 21, 2019 at 03:26 PM.
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
Drifting
Joined: Dec 2000
Posts: 1,785
Likes: 91
From: Leander TX
Unless you are going with a cam and better heads you probably wont even need a tune. I ran my 85 with TPIS Headers, HF cat, Magnaflow catback, Cut air lid and my K&N filter on the stock tune. Ran great and I didn't experience any ill effects. I went with a custom tune when I swapped in the ZZ4 but even with it, Edelbrock ported base, SLP ported runners, ported plenum and 52mm TB the stock computer did fine. I probably could have gained a few more HP and MPH by a custom set-up but not near the cost.
Burning Brakes
Joined: Sep 2016
Posts: 1,133
Likes: 319
From: Ohio
I mean I run an EBL flash in mine... I have messed around with the sniper stuff a little but the EBL is pretty much idiot proof as is the holly. I personally think the EBL setup is a little more intuitive once you learn tuner pro but the holly seems like it will do more... I like things simple I guess?
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Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
Burning Brakes
Joined: Sep 2016
Posts: 1,133
Likes: 319
From: Ohio
Insane? It depends. Do you need a Holley Dominator for a big cam build? No, too expensive. Even with self-tuning VE, constant EGO fueling correction, traction control, AFR/Oil pressure/Fuel pressure safety features, launch control, constant onboard datalogging, etc are all nice to have for a big cam setup but the $ amount comes into question.
Have a blower/turbo/nitrous, or a stripped car for the track? It'll be the best mod for the entire car.
Then you consider the EBL setup. Its what, $450? MS3x with a generic harness that you splice into yours is $800.
Have a blower/turbo/nitrous, or a stripped car for the track? It'll be the best mod for the entire car.
Then you consider the EBL setup. Its what, $450? MS3x with a generic harness that you splice into yours is $800.
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
Insane? It depends. Do you need a Holley Dominator for a big cam build? No, too expensive. Even with self-tuning VE, constant EGO fueling correction, traction control, AFR/Oil pressure/Fuel pressure safety features, launch control, constant onboard datalogging, etc are all nice to have for a big cam setup but the $ amount comes into question.
Have a blower/turbo/nitrous, or a stripped car for the track? It'll be the best mod for the entire car.
Then you consider the EBL setup. Its what, $450? MS3x with a generic harness that you splice into yours is $800.
Have a blower/turbo/nitrous, or a stripped car for the track? It'll be the best mod for the entire car.
Then you consider the EBL setup. Its what, $450? MS3x with a generic harness that you splice into yours is $800.
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
With boost theres no question to be asked. EBL does the self tuning and constant wide band correction... which for a big cam is all you really need. Once you start feeding it nitrous or boost having all of those features at your command is extremely beneficial... I'm not arguing. You use what is needed for the build. You can always over build too. But why waste money on things you're not going to need. I'd rather build a better short block.
The EBL AFAIK also doesn't offer closed loop via wideband o2, just narrowband. The wideband is only used by WUD on your laptop.
Nor does it give you different injector strategies, or work with different ignition triggers (24x, 58x, 36-1, etc).
It doesn't have any I/O beyond stock, or allow for custom triggers or functionality. Mainly because it's 30 year old electronics and software.
You're running a stock GM ECU with modified GM software that uses the expansion card.
For stock cars though it's a good fit and very popular. But it's not comparable to a good aftermarket standalone.
Rob is a very very smart guy, but I can't wrap my head around why he didn't just start from scratch and build a purpose-built ECU. Utilizing the factory p3 and p4 ECM hardware and software put serious limitations on the project.
Heck, even the Arduino based ECU's now are more powerful and feature packed and cheaper. A Microsquirt is $314 and has waaaaay more functionality than a GM ECU / EBL combo, and cheaper.
-- Joe
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
The Sniper is a good system, and you can modify your HEI distributor to work with it to provide full control to replace the factory '165 or '727 ECM.
You can also use the Holley HP software on the laptop to tune it, and ditch the handheld unit. I've considered using Sniper on boats, but I'm more of a fan of Megasquirt products.
-- Joe
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
The EBL is just an expansion card which gives you the ability to flash and log. It doesn't 'self tune', the software running on your laptop does.
The EBL AFAIK also doesn't offer closed loop via wideband o2, just narrowband. The wideband is only used by WUD on your laptop.
Nor does it give you different injector strategies, or work with different ignition triggers (24x, 58x, 36-1, etc).
It doesn't have any I/O beyond stock, or allow for custom triggers or functionality. Mainly because it's 30 year old electronics and software.
You're running a stock GM ECU with modified GM software that uses the expansion card.
For stock cars though it's a good fit and very popular. But it's not comparable to a good aftermarket standalone.
Rob is a very very smart guy, but I can't wrap my head around why he didn't just start from scratch and build a purpose-built ECU. Utilizing the factory p3 and p4 ECM hardware and software put serious limitations on the project.
Heck, even the Arduino based ECU's now are more powerful and feature packed and cheaper. A Microsquirt is $314 and has waaaaay more functionality than a GM ECU / EBL combo, and cheaper.
-- Joe
The EBL AFAIK also doesn't offer closed loop via wideband o2, just narrowband. The wideband is only used by WUD on your laptop.
Nor does it give you different injector strategies, or work with different ignition triggers (24x, 58x, 36-1, etc).
It doesn't have any I/O beyond stock, or allow for custom triggers or functionality. Mainly because it's 30 year old electronics and software.
You're running a stock GM ECU with modified GM software that uses the expansion card.
For stock cars though it's a good fit and very popular. But it's not comparable to a good aftermarket standalone.
Rob is a very very smart guy, but I can't wrap my head around why he didn't just start from scratch and build a purpose-built ECU. Utilizing the factory p3 and p4 ECM hardware and software put serious limitations on the project.
Heck, even the Arduino based ECU's now are more powerful and feature packed and cheaper. A Microsquirt is $314 and has waaaaay more functionality than a GM ECU / EBL combo, and cheaper.
-- Joe
And yes, Rob is the man. I've picked his brain a few times and he also isn't too far away from me if I wanted to do it in person. He actually got me my ham board installed lol.
Racer
Joined: Sep 2015
Posts: 261
Likes: 24
From: Israel
https://www.corvetteforum.com/forums...-corvette.html
https://www.corvetteforum.com/forums...olley-ecm.html
The first is detailed EBL swap.
The second is Holley.
I just finished my EBL in my 85. I'm very satisfied. my set up: 24lbs Bosch III, OBX headers. I sent my intake (plenum and base intake) to port match AS&M runners (1.6").
In the future I'm going to replace the cam and heads to something mild. don't know which yet.
P.s:
There is another option:
https://www.fuelairspark.com/ez-efi-...-fit-type.html
https://www.corvetteforum.com/forums...olley-ecm.html
The first is detailed EBL swap.
The second is Holley.
I just finished my EBL in my 85. I'm very satisfied. my set up: 24lbs Bosch III, OBX headers. I sent my intake (plenum and base intake) to port match AS&M runners (1.6").
In the future I'm going to replace the cam and heads to something mild. don't know which yet.
P.s:
There is another option:
https://www.fuelairspark.com/ez-efi-...-fit-type.html
Last edited by Yariv; May 23, 2019 at 03:41 AM. Reason: add