Holley EFI Help

jswoodfin · 08-15-2017, 09:43 PM

We installed a Holley Dominator EFI system on our Altered and are struggling to reach the expected performance of this package. I realize an Altered isn't a legal Stock/Super Stock package, but I know that many of you have EFI experience.

I'm looking for an EFI expert/guru to review my data and provide feedback to improve the performance. I've had some help along the way, but believe we're missing a lot of power.

The 417 SBC "should" produce 900+ HP, but we're only getting 660 HP.

Who do you lean on when you need EFI help?

Thanks,

Jeff Woodfin

Glenn Briglio · 08-15-2017, 10:01 PM

Quote:

Originally Posted by jswoodfin

We installed a Holley Dominator EFI system on our Altered and are struggling to reach the expected performance of this package. I realize an Altered isn't a legal Stock/Super Stock package, but I know that many of you have EFI experience.

I'm looking for an EFI expert/guru to review my data and provide feedback to improve the performance. I've had some help along the way, but believe we're missing a lot of power.

The 417 SBC "should" produce 900+ HP, but we're only getting 660 HP.

Who do you lean on when you need EFI help?

Thanks,

Jeff Woodfin

Did you contact Holley?

goldformula · 08-16-2017, 09:24 AM

Your location may help in directing you to a good shop.

I believe Holley has a list of approved dealers and installers.

GUMP · 08-16-2017, 10:29 AM

I would get with Holley. They have some sharp people. Also, if you get the opportunity, their classes are worth attending.

340Cuda · 08-16-2017, 12:49 PM

I would recommend Scott Clark.

He can give you immediate help. I would also recommend you attend one of his classes. They are a good value.

He can work with most anything, Holley, FuelTech, Megasquirt and others. He has tuned everything from Bonneville Cars to NHRA ProStock and more. He is a straight shooter and a good guy.

scott@realtuners.com

https://realtuners.com/

https://www.facebook.com/RealTuners-...1791515720605/

Good Luck!

Bill

Sean Marconette · 08-16-2017, 01:10 PM

Jeff,
There are a couple of guys on the Holley forum that will help you and also review your system. One of the guys has his own shop and knows his stuff and also races. Have you tuned it on a dyno? Also if you are not running an NTK O2 sensor that could be a source of poor performance. My standard O2 only lasted thru 2 dyno sessions and roughly 15 gallons of C16 when the motor fell on its face while testing. I already had an NTK and the motor came back to life.

There is a lot to be had with the timing and AFR tables, if your timing sync is not correct or stable thru the RPM range that may be another thing to look at.

Sean

Ed Wright · 08-16-2017, 03:27 PM

Might want to dyno it with a carb to verify it is an EFI tuning issue, not the engine.

Woodfin · 08-16-2017, 07:21 PM

Ed,

we are borrowing a set of BLP carbs to test with. That will be the telling.

jswoodfin · 08-16-2017, 08:49 PM

Thanks men. I have messages into Holley and Scott.

Rob Wright · 08-19-2017, 11:38 AM

I have worked quite extensively with the Holley system and a pretty wide variety of engines and displacements for endurance and drag racing applications. I would be happy to take a look at your data if you send it to me. If it is far off as you say it is something should glare in the data.

08-15-2017, 09:43 PM	#1
jswoodfin Junior Member Join Date: Dec 2015 Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Holley EFI Help We installed a Holley Dominator EFI system on our Altered and are struggling to reach the expected performance of this package. I realize an Altered isn't a legal Stock/Super Stock package, but I know that many of you have EFI experience. I'm looking for an EFI expert/guru to review my data and provide feedback to improve the performance. I've had some help along the way, but believe we're missing a lot of power. The 417 SBC "should" produce 900+ HP, but we're only getting 660 HP. Who do you lean on when you need EFI help? Thanks, Jeff Woodfin

08-16-2017, 09:24 AM	#3
goldformula Junior Member Join Date: Nov 2014 Posts: 6 Likes: 1 Liked 0 Times in 0 Posts	Re: Holley EFI Help Your location may help in directing you to a good shop. I believe Holley has a list of approved dealers and installers.

08-16-2017, 10:29 AM	#4
GUMP VIP Member Join Date: May 2002 Location: Shelby, NC Posts: 1,816 Likes: 2,138 Liked 2,318 Times in 545 Posts	Re: Holley EFI Help I would get with Holley. They have some sharp people. Also, if you get the opportunity, their classes are worth attending.

08-16-2017, 12:49 PM	#5
340Cuda VIP Member Join Date: Apr 2003 Location: Tulsa, Oklahoma Posts: 1,657 Likes: 3,802 Liked 759 Times in 330 Posts	Re: Holley EFI Help I would recommend Scott Clark. He can give you immediate help. I would also recommend you attend one of his classes. They are a good value. He can work with most anything, Holley, FuelTech, Megasquirt and others. He has tuned everything from Bonneville Cars to NHRA ProStock and more. He is a straight shooter and a good guy. scott@realtuners.com https://realtuners.com/ https://www.facebook.com/RealTuners-...1791515720605/ Good Luck! Bill

08-16-2017, 01:10 PM	#6
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 977 Likes: 787 Liked 274 Times in 76 Posts	Re: Holley EFI Help Jeff, There are a couple of guys on the Holley forum that will help you and also review your system. One of the guys has his own shop and knows his stuff and also races. Have you tuned it on a dyno? Also if you are not running an NTK O2 sensor that could be a source of poor performance. My standard O2 only lasted thru 2 dyno sessions and roughly 15 gallons of C16 when the motor fell on its face while testing. I already had an NTK and the motor came back to life. There is a lot to be had with the timing and AFR tables, if your timing sync is not correct or stable thru the RPM range that may be another thing to look at. Sean __________________ Sean Marconette 84 Mustang 5060 SS/N

08-16-2017, 03:27 PM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Holley EFI Help Might want to dyno it with a carb to verify it is an EFI tuning issue, not the engine. __________________ Ed Wright 4156 SS/JA

08-16-2017, 07:21 PM	#8
Woodfin Senior Member Join Date: Sep 2006 Location: Kilgore TX Posts: 521 Likes: 8 Liked 235 Times in 92 Posts	Re: Holley EFI Help Ed, we are borrowing a set of BLP carbs to test with. That will be the telling.

08-16-2017, 08:49 PM	#9
jswoodfin Junior Member Join Date: Dec 2015 Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Re: Holley EFI Help Thanks men. I have messages into Holley and Scott.

08-19-2017, 11:38 AM	#10
Rob Wright Junior Member Join Date: Feb 2016 Posts: 45 Likes: 2 Liked 21 Times in 7 Posts	Re: Holley EFI Help I have worked quite extensively with the Holley system and a pretty wide variety of engines and displacements for endurance and drag racing applications. I would be happy to take a look at your data if you send it to me. If it is far off as you say it is something should glare in the data.