Mike,
I saw a ramjet 502 under the hood of a C2. The guy cut the runners and welded it lower on the intake (there is some clearance between the fuel rails and plenum). Not sure if it would clear a C3 hood or not. Email me if you are interested and I will try to find the web page. Alternately you could go with the Holley setup like Zwede.

 

Sure. Here's the Holley C950 MPFI on my 454:

 

Looks ! Are the relays on the firewall part of it?

 

One relay is stock, one is for the EFI and 3 are for the cooling fans (two speed).

 

Personally, I'm putting together:

www.megasquirt.info

I have about $5-600 in the controller and wiring harnesses.

I bought an 85 C4 Tpi setup for $400.

I still need a fuel pump, but it looks like I'll make the conversion for under $1500.

(oh yeah, and I actually know how to tune it. Never ceases to amaze me how many ppl. put an aftermarket EFI on and don't know how to get it running right).

If you have the cash for a FAST system or something like that, you're probably not too worried about the cost of gas.

Oh, did I mention that the setup I have will have the EGR and be emissions compliant? (most of the aftermarkets don't have an EGR).

Do your homework and ask LOTS of questions before going down this road, as a few bad choices can cost you.

BTW, just measured tonight, looks like my TPI setup will clear my stock hood. Schweet.

 

yes tpi will clear a stock hood.

 

Yeah, I'm going for the megasquirt system, as well...

Of course, my problem is slightly different- I'm running a GMC 6-71 supercharger on top of a 7.8:1 427 BBC. I've also got the TKO-600 installed, as well... My problem is that, with the dual 600 Holley carbs I'm running, they run pig-rich at idle and low RPMs, but the engine runs sweet once I get past the idle-transition... I've pulled 'em apart so many times, I could do it with my eyes closed... Holley tech was no help, nor has anybody else been able to resolve this issue... SOooooooooooo.....

I've gone the MS 3.0 route. Already bought the wide-band O2 sensor, the controller... I'm building a throttle-body to go on top of the blower (that will also house the injectors), with a 10" X 2" butterfly.... Between the WB O2 sensor, 4 150# injectors and staged injectors, it should run very smoothly, get good mileage (as long as I don't stomp on the gas pedal) and yet still deliver somewhere around 650 HP on pump-gas....

I'm planning on selling my new Holley carbs, so with that offsetting the cost, I imagine my total cash outlay to do this will be in the neighborhood of $500.

Who SAYS you can't have your cake, and eat it, too....

 

Check out Accel's Pro Ram before you do anything. It's a carb style like the Holley. Calmap is probably the best tuning software out there and Accel has pretty good technical support. YOu can control electric fans, shift lights, converter lockup, and pretty much every aspect of the engine. You can even use sequential injection with their Dual Sync distributor. Download their catalog and check it out. YOu can also download the software for free if you want to look at it.

Catalog
http://www.accel-dfi.com/CatalogsList.aspx?BrandID=8

Calmap Software
http://go.mrgasket.com/calmap/calmap...ion_7_Systems/

 

Pat,

Out of curiousity, are you going back to a carb. ? I have an almost identical TPI setup, and some of the "old-timer" drag gurus in my neighborhood are really encouraging me to go to BG carb.

Thanks,

Ray

 

If you drag race often then a carb is a cheaper way to go to get more power, tpi falls off at about 4500 with no mods, but if want a better all around driving and gas mileage then the tpi wins hands down.

Carb guys prolly hate you since you can get them off the line and can lay down a hellacious burn out with the added low end torq the tpi provides.

 

I'm also going the Megasquirt direction. I bought the parts, and my dad was kind enough to do the soldering. The computer is done, and is setup to control distributorless ignition as well. The ignition components come from a Ford. I'm using two four cylinder coil packs, and a module from a Mustang. For the throttle body, I'm using one from an older FI system. You can buy this throttle body, and get a lot of information, here:

www.auto-nomics.com

I was going to put this system on the Camaro, but changed my mind. I hope to have this system up and running by the spring. The nice thing about the throttle body I'm using is that it bolts right in place of the Quadrajet. Later on, I can switch to a port injection manifold for better low RPM function.

Ken

 

no ,no carb. for me,im going with a ls based motor ,fuel injected for now on.if your gone to be drag racing it,youll need better runners and intake,im maxed at 5300.

 

For those with the mega squirt. Would you recommend buying the kit and assembling it or buying it assembled?

 

I bought all my stuff from www.rs-autosport.com.

Rodney (the owner) is a good guy, and I personally can vouch for my controller and stim working great.

I bought the controller and the stim about a year and a half ago, and I've used that time to become familiar with the tuning software and how it all works.

If you really want to assemble it yourself, log onto:

http://www.msefi.com/

The megasquirt forums have an entire section dedicated to helping folks build their own (and the manual is awesome too). At each step you are testing stuff, I was pretty close to doing it myself...

Check out the 'Success Stories' section for what really works. Alot of the folks there really dish it out for what works and what doesn't.

Great group, very helpful.

 

This has not been my experience. I need to upgrade the firmware which I'm told will be a big help. But after I actually bought my system I no longer got replies to my questions. Also of the 3 EMICs in my area only one had a dyno for tuning. The Accel works well after you get it tuned. If I did it again I would probably go with the FAST system.

 

That depends on your skill level, and what you want out of the system. I had the benefit of my dad's help. He is an electrical engineer, and has built several of his own systems from scratch. He has followed MS for a while. When we built the system, he was very impressed with a lot of things they did in the actual circuit. In fact, he has since built one or two more for his friends.

For me, I enjoyed seeing how it was put together, but the biggest benefits are being able to tune it, the low cost, and the fact that it is constantly being improved upon.

There are several people that build them with the consent of the main MS founders. These units are still thousands less than most systems. You will still have to make the harness and install the sensors. I would also suggest spending some time on their forum.

Good luck.
Ken

 

I've heard too many negative things about FAST to go with them. I didn't deal with an EMIC the first few months I had the system. I only talked to the guys at DFI which were extremely helpful in getting the engine cranked and a pretty good initial tune in. After too much data logging on the road, I had it to where it was good enough to run a 13 in the 1/4. Then I took it to an EMIC in Boynton with a dyno and he put my tuning to shame by picking up another 90 ft. lb of toque and 50 HP. Guy was extremely nice and did a good job.

If I were going the aftermarket route again I'd choose Calmap.

 

I have toyed with the notion of the Commander 950 TBI setup for my car. Does anyone out there know if it will fit under a stock BB hood? I would be putting it on top of a LS6 manifold. I know that for the MPFI version it necessitates a hood swap so that is out of the question for me. TBI is the ONLY one I will consider, and ONLY if my hood will close after it is bolted on there. It can't be much taller than a carb....

Zwede, any first hand experience with a TBI setup?

 

Nope, no first hand experience. I don't think it will fit though because the injectors stick up a good bit and I know back when I had a carb the air cleaner lid was very close to the top of the carb.

 

Hmm. Well, right now I have a 1/2 in Phenolic Spacer, and a thin Holley heat shield under my 850 Demon carb and it all fits just fine. Surely the throttle body plus injectors don't stick up that much... But, I have been wrong before... Anyone else out there try this setup on their car?