We finally got my 27T out to the track today with the newly installed EFI system. The motor is an alcohol BBC (60 over 427) with decent rectangular port aluminum heads and a flat tappet cam.

Last year I was running a modified 4150 Holley carb that flowed 950CFM. We installed an Electromotive Tec3r with a 2,000CFM 4bbl. TB. On the dyno, the car made ~60 more rwhp and it ran ~5mph faster. Obviously, most (if not all) of the hp gain has nothing to do with EFI v. a carb but with less intake restriction due to the large TB. Nothing too suprising there. But what is interesting is the drivability and ease of tuning. Sure, there are motors of this type running twin Dominators. These would flow as much as the 4bbl TB and make as much hp. But anyone who ever tried to get a couple of huge carbs to work on a relatively small motor will know how difficult that is. Even when set up expertly, they don't usually drive well. This setup drives like a street car. Idles fine at 1,100 rpm and can be driven around the pits at idle. And it took less than an hour to tune it.

I'm sure there are others doing this. But in my area I know of no one running a similar setup. I am glad I did it. With the additional changes I have planned for the car, the nightmare of carb tuning will be a thing of the past.

Rich

 

Is that a progressive throttle body?

 

Low idle vacuum & distribution problems (reversion) due to a big cam makes it rather hard get a good idle with a carb. Mileage will also suck as well.
I gained 2mpg on 1 car... which is a lot when you go from 6 to 8.

My experience with fuel injection is that it tames a big cam & regains a lot of drivability. It is hard to oversize a t-body as well. Not to mention tuning a dry nitrous system is very easy with EFI.

Twin dominators on the street is not my idea of fun, but they sure do look cool.

Here is a similar EFI setup.... 278/288 degree @ .050 cam, if you can call that streetable.
http://www.lonniesperformance.com/mustang.htm

 

Yes, the primary side opens almost completely before the secondary side.

The cam is 270/280 @ 0.050'. Which is BIG for a flat tappet cam in a 427. Also, with a 110LSA there is quite a bit of overlap. Again, it was so easy to tune compared to a big carb setup that I was astonished. There were a few tricks that we wouldn't have necessarily figured out quickly on our own, but the people at Electromotive were very helpful.

Rich

 

I was wondering how it handled opening of the blades, since that is a lot of air - I guess it would be more linear if the one blade is all the way open before the other starts to open. That's a wild setup - don't forget to wear your helmet!

Lonnie - those are some good points - I agree and have found them to be true also in my limited experience. Once you get the needed tools to tune EFI and get over the initial expense, it is great to work with. Too bad for me my timing was always off with what I was learning - I just got good at carbs and points ignitions and had collected all the tools and supplies just about when it was obsoleted, just like I got real good at DOS about the time Windows took over everything. EFI has taken a long time to learn mostly due to having to piece together bits & pieces of it over the years (working with stock ECUs) and the magazines & books don't seem to address tuning very well like they did with carbs & distributors. I think that's why it scares some people off.

 

What did you run? What do you expect to run? Sounds absolutely retarded... I wish I had one. haha

 

Yeah, if the day comes that Rich dissapears off the board for a long while, we can make a pretty good assumption of what might have happenned to him. He either forgot his parachute or warped into another time zone or got spaghettified by aproaching light speed and infinite mass

 

Set up for brackets I dialled in at 9.3xx depending on conditons with a very soft launch to avoid wheelspin. With a hard launch it would run in the low 9.2 range at ~144mph. With an additional 60rwhp on the dyno and based on the first day at track with it I expect I will be dialling in at the 9.0x-9.2x with the hope to hit an 8.99 @ 150 on a ***** out run.

It's a pretty mild motor at this point. I have most of the parts to put together a stroker next year with a roller cam. I want to go a bit faster but still be consistent for the brackets but also add 100-150 nitrous shot on top of the stouter motor just for grins. It's a short wheelbase car (110") so there is only so much hp it can take and remain consistent.

Rich

 

Rich....nice! I cant wait to see your car again! Are you going to the track this week?

Jason

 

Yes, if the weather is good on Saturday. Be nice to see you!

Rich

 

Fixed!

 

That motor sure looks familiar..

http://www.outlawdragradial.com/bigblock/dsc00604.jpeg

 

Brady,
What a coincidence..... It used to look like a Camaro though.
But, it will look different after the ProCharger goes on.

I even hope to put on a few street miles this year. I think it will attract some attention.