Problem with new motor

foxforever · December 24th, 2005, 11:20 PM

I have a new motor that doesn't seem to be performing at its best. When I gradually push on the gas the engine performs as expected. However, when I try and take off at full throttle the engine just loses all power. Can you help?

Twist 2 Go · December 25th, 2005, 01:08 AM

give us some more details.....cam size, fuel system, gearing, etc.....

foxforever · December 27th, 2005, 12:15 AM

I have 165cc ARP heads (61cc), 70mm throttle body, 76mm mass air kit, 24lb injectors, Edelbrock RPM II intake, 1.7 roller rockers, comp cam. What numbers do you need off the cam card?

foxforever · December 27th, 2005, 12:17 AM

I forgot... I have aeromotive fuel lines and adjustable fuel regulator. The fuel pressure is set at 39psi. The fuel pump is stock.

Twist 2 Go · December 27th, 2005, 01:09 AM

Originally Posted by foxforever

I have 165cc ARP heads (61cc), 70mm throttle body, 76mm mass air kit, 24lb injectors, Edelbrock RPM II intake, 1.7 roller rockers, comp cam. What numbers do you need off the cam card?

lift & duration, rpm range.
did you degree the cam or just stick it in?
when you say it "loses all power", does it buck and jerk, fall flat on it's face and then take off, or does it feel like something is holding it back?

foxforever · December 27th, 2005, 01:11 AM

Originally Posted by Twist 2 Go

give us some more details.....cam size, fuel system, gearing, etc.....

I replied to your question but wasn't sure how to let you know. I'm new to the forum thing.

Aliate X · December 27th, 2005, 11:39 PM

Make sure the MAF is clean. I had a similar problem with my stock motor, but same exact symtoms. Cleaned the MAF (the wires) and I went from a 16.9@88 to 14.4@95 (bone stock)

IcantDo55 · December 28th, 2005, 12:29 AM

Timeing? Advance?

foxforever · December 29th, 2005, 01:25 AM

Here are the cam specs exactly as on the card:
valve adjustment .000 .000
gross valve lift .544 .544
duration @ .006 tappet lift 276 282
valve timing open @.006 int: 28 BTDC 67 ABDC Exh: 75 BBDC 26 ATDC
Specs are for cam installed @108 intake center line
Duration @ .050 224 230
lobe lift .3210 .3210
lobe seperation 112

foxforever · December 29th, 2005, 01:31 AM

The timing is set @10 degrees because that is what the tech guy told me to set it at when I installed the diablosport chip.
To be more specific about what it does at full throttle, it just feels like something is holding it back. It just boggs down and won't gain any power unless I let off the gas and slowly apply throttle.

Twist 2 Go · December 29th, 2005, 09:19 AM

sounds fuel related to me. For a start, I'd ck the fuel pressure.

gicantor2 · April 23rd, 2006, 07:15 PM

Its probably your fuel pump. The stock pump only flows at 88lph and going by the mods you listed your going to need more than that. Its probably not flowing enough fuel in the high rpms.

December 24th, 2005, 11:20 PM	#1
foxforever Newbie Join Date: Nov 2005 Posts: 12 iTrader: 0 reviews	Problem with new motor I have a new motor that doesn't seem to be performing at its best. When I gradually push on the gas the engine performs as expected. However, when I try and take off at full throttle the engine just loses all power. Can you help?

December 25th, 2005, 01:08 AM	#2
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	give us some more details.....cam size, fuel system, gearing, etc..... __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

December 27th, 2005, 11:39 PM	#7
Aliate X Regular Join Date: Aug 2005 Posts: 213 iTrader: 0 reviews	Make sure the MAF is clean. I had a similar problem with my stock motor, but same exact symtoms. Cleaned the MAF (the wires) and I went from a 16.9@88 to 14.4@95 (bone stock) __________________ Everything + Nitrous

December 28th, 2005, 12:29 AM	#8
IcantDo55 Enthusiast Join Date: Aug 2005 Location: Va Beach VA Posts: 590 iTrader: 0 reviews	Timeing? Advance? __________________ -Mike Link to My Site Want to Play Some Pool??? Stroked and Blown!

December 29th, 2005, 09:19 AM	#11
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	sounds fuel related to me. For a start, I'd ck the fuel pressure. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

December 27th, 2005, 12:15 AM	#3
foxforever Newbie Join Date: Nov 2005 Posts: 12 iTrader: 0 reviews	I have 165cc ARP heads (61cc), 70mm throttle body, 76mm mass air kit, 24lb injectors, Edelbrock RPM II intake, 1.7 roller rockers, comp cam. What numbers do you need off the cam card?

December 27th, 2005, 12:17 AM	#4
foxforever Newbie Join Date: Nov 2005 Posts: 12 iTrader: 0 reviews	I forgot... I have aeromotive fuel lines and adjustable fuel regulator. The fuel pressure is set at 39psi. The fuel pump is stock.

December 29th, 2005, 01:25 AM	#9
foxforever Newbie Join Date: Nov 2005 Posts: 12 iTrader: 0 reviews	Here are the cam specs exactly as on the card: valve adjustment .000 .000 gross valve lift .544 .544 duration @ .006 tappet lift 276 282 valve timing open @.006 int: 28 BTDC 67 ABDC Exh: 75 BBDC 26 ATDC Specs are for cam installed @108 intake center line Duration @ .050 224 230 lobe lift .3210 .3210 lobe seperation 112

December 29th, 2005, 01:31 AM	#10
foxforever Newbie Join Date: Nov 2005 Posts: 12 iTrader: 0 reviews	The timing is set @10 degrees because that is what the tech guy told me to set it at when I installed the diablosport chip. To be more specific about what it does at full throttle, it just feels like something is holding it back. It just boggs down and won't gain any power unless I let off the gas and slowly apply throttle.

April 23rd, 2006, 07:15 PM	#12
gicantor2 Newbie Join Date: Apr 2006 Location: Thorold, ON, Canada Posts: 8 iTrader: 0 reviews	Its probably your fuel pump. The stock pump only flows at 88lph and going by the mods you listed your going to need more than that. Its probably not flowing enough fuel in the high rpms.

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