Edelbrock E-Force Troubleshooting Manual

[illtal]

Mine has been driving like a dream on the street, with the open-air configuration, in the form of the Modified PMAS CAI. She's going on the dyno Thursday at 10 am MST. I'll post the results when I get back. I also need to get the boost numbers from the dyno so I can see whether I have enough room to pulley down one size. For my last dyno, I was at 8.8 lbs with the stock airbox and cutouts open. Lund recommended not going over 10 lbs on 91. I have no idea what pulley size that would be, but I'll do my homework and find out...

if you have a 2650 kit and a stock airbox that is 3.5" to not go above 10 PSI.
The stock pulley is an 11 PSI 3.25" pulley

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[mikengail]

if you have a 2650 kit and a stock airbox that is 3.5" to not go above 10 PSI.
The stock pulley is an 11 PSI 3.25" pulley

Hmmm. If the stock pulley is 11 lbs, I wonder why I have only 8.8 lbs? Mine started life as a Stage-1 kit. My last dyno was with the stock airbox. My exhaust is long tubes and stock mufflers only, no cats or resonators.

I know that long tubes, if designed to scavenge effectively, with a free flowing exhaust can reduce exhaust back pressure enough to actually reduce boost a little. However, I always thought that a more free flowing less restrictive intake system may increase boost a little. I guess I'll know more after I dyno the car in a couple of days...

 

[Torinate]

Good luck with the dyno!!

 

[illtal]

Hmmm. If the stock pulley is 11 lbs, I wonder why I have only 8.8 lbs? Mine started life as a Stage-1 kit. My last dyno was with the stock airbox. My exhaust is long tubes and stock mufflers only, no cats or resonators.

I know that long tubes, if designed to scavenge effectively, with a free flowing exhaust can reduce exhaust back pressure enough to actually reduce boost a little. However, I always thought that a more free flowing less restrictive intake system may increase boost a little. I guess I'll know more after I dyno the car in a couple of days...

Are you in altitude? Do you have a stock crank damper?

When I moved to the "Competition Airbox and 103MM TB" with a 3.15" pulley it produced 11-12# when driving normally just like the 3.25#. The real problem is the Airflow will be vastly different. The air load changes when you reduce all of that restriction.

I have Longtubes and a 3 inch exhaust setup. Most of the restriction is on the Intake valve side not on the exhaust side like a turbo setup.

 

[mikengail]

Are you in altitude? Do you have a stock crank damper?

When I moved to the "Competition Airbox and 103MM TB" with a 3.15" pulley it produced 11-12# when driving normally just like the 3.25#. The real problem is the Airflow will be vastly different. The air load changes when you reduce all of that restriction.

I have Longtubes and a 3 inch exhaust setup. Most of the restriction is on the Intake valve side not on the exhaust side like a turbo setup.

Yep, over a mile high in Albuquerque. That's why 91 here works a little better than 93 at sea level. I'm still using the stock crank damper...

 

[illtal]

Yep, over a mile high in Albuquerque. That's why 91 here works a little better than 93 at sea level...

I don't see why you can't run 10 PSI, problem is if you go back down altitude, so it's probably best you leave the pulleys as is.

 

[mikengail]

I don't see why you can't run 10 PSI, problem is if you go back down altitude, so it's probably best you leave the pulleys as is.

Probably so. She's not a garage queen. I drive the car everywhere. Thanks for the chart, by the way. Handy reference...

 

[mikengail]

Good luck with the dyno!!

Well, here's what she did this morning. Nice improvement from last week. The top 2 runs are today. The bottom 2 are last week. For each of those days, one run was cutouts closed and one run open. The cutouts only added 3 to 4 rwhp. The more open less restrictive induction system helped up the boost from 8.8psi to around 9.5psi. 28.34rwhp increase, peak to peak...

 

[Torinate]

Nice runs!

so what changed from last week? Just the PMAS air intake? New tune I assume to account for it. Is that all? That’s with headers. Any cats?

well done!

 

[mikengail]

Nice runs!

so what changed from last week? Just the PMAS air intake? New tune I assume to account for it. Is that all? That’s with headers. Any cats?

well done!

Modified PMAS 120mm CAI, Ford Racing Bullitt/Mach-1 Digital Throttle Body, Ported Ford Racing Throttle Body Adapter and, of course, a tune adjustment.

My exhaust is Pypes Step-Up style Long Tubes, no cats, H-Pipe Resonator Delete, and stock mufflers...

 

[illtal]

Modified PMAS 120mm CAI, Ford Racing Bullitt/Mach-1 Digital Throttle Body, Ported Ford Racing Throttle Body Adapter and, of course, a tune adjustment.

My exhaust is Pypes Step-Up style Long Tubes, no cats, H-Pipe Resonator Delete, and stock mufflers...

3.25" pulley? Can't really tell but is this AFR at eh bottom? Did you run any Octane booster?

 

[Torinate]

So you picked up 28~ whp with the TB and PMAS and tune adjustment for the MAF. Did they add any timing or basically just adjusted for the new MAF?

that’s a nice gain! Not to mention the surging is gone.

 

[mikengail]

3.25" pulley? Can't really tell but is this AFR at eh bottom? Did you run any Octane booster?

Yes, AFR is at the bottom. Sorry for the small font. I did put a 15oz bottle of Lucas Octane Booster in a full tank of 91 just to be on the safe side. More concerned about pre-detonation than horsepower increase for dyno runs. The chart I use indicates an estimated final octane somewhere between 97 and 98...

 

[mikengail]

So you picked up 28~ whp with the TB and PMAS and tune adjustment for the MAF. Did they add any timing or basically just adjusted for the new MAF?

that’s a nice gain! Not to mention the surging is gone.

Just the PMAS and the 87mm TB. The tuning adjustment was just for that, not more timing. Remember, what probably woke that TB up so much was having the adapter ported to take full advantage of the entire 87mm...

 

[illtal]

Yes, AFR is at the bottom. Sorry for the small font. I did put a 15oz bottle of Lucas Octane Booster in a full tank of 91 just to be on the safe side. More concerned about pre-detonation than horsepower increase for dyno runs. The chart I use indicates an estimated final octane somewhere between 97 and 98...

I was curious because you got fairly close to 12, I run water/meth and leaned out to 12.
it's good to see the results are nearly the same: very predictable results.

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