Mallory 4309 FPR is what I would suggest. Use an Aeromotive A1000 with -10 supply and -8 return lines in/out of the 4309 and your fuel supply and delivery is complete and sufficient. You can use the RB bridge-prepped Holley and change out the floats to brass and a few other tricks and she'll flow plenty and work great. Get you a carb bonnet for the Holley and you hook up your IC piping. Did this back in the early 2000s and worked great. Hope that helps....at least to get the thread back on topic.

Oh, and the link that 680/rotaryshack listed is a great site and can provide you with everything you need for a blow through setup. 680/rotaryshack is a great source of info as well. He hasn't made the kind of power with his setups by not knowing what he is doing. Good guy to know.

Of course you can eliminate a blow through setup and place the charged air below the carb. Just another option. Read, read, read....then read some more. this can be easily done and has been done many times. Good choice IMO for bringing something a little old school back.

Todd B.

finally some accurate info, thanks.. however you want to eliminate the brass floats and use the solid ones so they dont crush under boost..
lock your distributor to prevent advance under boost, run colder spark plugs and your good to go

As RXvedub stated, lock the dizzy and I always just used NGK BR9EQ14 plugs. As far as the floats, you can use the solid poly floats, I only plugged the brass due to their inexpensiveness (is that even a word???). Brass can be used, but highly not recommended for boost higher than 10 psi. The hollow poly floats are even worse to split open, IMO.

I'm going to very much disagree with you. I hate to break it to you but I hope you do realize that many of the fast ass rotaries in P.R. are blow-thru. Carb's arent as big of a piece of junk as you think. For how old they are and how they compare to a electrically controlled system, I think their pretty damn good.

i am pretty interested in the idea of introducing the boost under the carb. i have never thought of this before. any mods needed to the holley to do this??

You're not disagreeing with me, you are disagreeing with the other guy. Check your quotes:)

I would suggest the solid floats like mentioned above, brass is setible to being crushed under pressure. There are many good books on how to modify holleys for blow through applications, there is also a good website regarding holley blow through that is very thorough with step by step instructions and pictures(FREE!). Research... Also, slight curve ball on what was mentioned earlier about the holley blue Fuel pump, this particular pump is a very high flow unit but is internally regulated at 14psi... please be warned if you set your initial fuel pressure at 5psi and crank 9psi of boost and assuming your fpr is 1:1, you have theoretically maxed the pump past its pressure limit. I cant think of an alternative at this point, thats where I am stuck at right now unfortunately.

Bumping the dead much? All things equal except Carb vs EFI, EFI always wins. If they took that 7.6 car, ditched the carb and put EFI on it, there's no reason it couldn't have done the same or better.

It amazes me how some of you drag racers are so incredibly ignorant that you think everybody else is stupid. God love ya for it though.

Carbs may be great for drag racing, but that is about it.

They're not even 'better' at that. It's just an apparent refusal to switch technologies, and an ever growing lack of interest in attempting to surpass existing 'records'.

One advantage I've seen on carb'd vehicles is the intake plumbing, better lims etc; you've gotta admit they do make serious power. Look at this recent one with a mild tune; 418rwhp on a 55mm inducer?! Most people can't hit that at 15psi on a 62+mm turbos, especially on stock intake ported s4 t2 engine.

https://www.rx7club.com/time-slips-dyno-128/418rwhp-fc-power-879175/

There is no difference in intake plumbing. In fact, a Holley Pro-Jection or Pro-Jay throttle body may even work as a direct swap in the car that you posted.

Show me just one LIM that can't be fuel injected.

What exactly do you mean by "etc."?

Somebody please stop the ignorance, lol.

well to keep the hate going :) I am thinking on doing similar set up on my rx2. I am just trying to find who can boost prep the carb for me im thinking on going with a 650dp holley. The only reason for doing this is becouse of the funding issue it will work for what i need and wont cost nowhere near as much as EFI for the same HP levels im looking for.

prep a 500 edlebrock and it "could" work well if you are competent. Very simple prep!

anything and everything that can be done with carbs can be done with EFI...

carbs have 0 advantage, while with EFI you can control your fuel to less then a millisecond and it's configurable throughout the entire rev-rage and vacuum range. you can also have it look at the current AFR and EGTs and correct itself. show me a carb that can do that.

take the money you'd be spending on that carb and go buy a megasqirt.

turbo carbs are rare because they're a pain in the ass to maintain. have fun blowing up your engine.

/thread.

This is an old debate. I ran a 12A blowthrough for a number of years. Ran awsome. Drove great. I swapped to FI because I reached a limit of how much reliable streetable power I wanted. Would I do a blowthrough again? Sure. I have built and help build quite a few. You need to run your stock efi fuel pump. Use a Aeromotive 13202 regulator and you will be fine. If you need any help give me a pm. If you have any questions of my old blowthrough setup....
http://www.youtube.com/watch?v=PNG6JRoqXu8

A turbo prepped edelbrock and a locked dizzy "will" perform well and drive admirably. Difference vs a efi car with a standalone controlling fuel and ignition may be slight or major depending on your ability to control your fuel curve and set the timing right. You do lose some potential in the timing because you have to lock it to keep things safe. You lose some potential with the carb by staying conservatively rich unless you know how to dial your carb in right (which I can and do). On the other hand, if you modify the distributor to bring in some advance and control it with the vacuum advance thus retarding under boost, and dial the carb to a "tee" you can easily meet the performance of a standalone. However, and I mean "HOWEVER!!!!", your ear/foot (throttle) reaction to detonation cannot compare to that of a standalone reacting to detonation from a knock sensor. Changes in pressure and temps can necessitate jetting changes to maintain this performance standard and prevent detonation or going lean. The standalone can dump more fuel and pull timing before you ever hear a thing. That is a big thing to keep in mind the next time you get a bad tank of gas. For me a carb works awesome on my camden, when the future budget brings a turbo, it with accompany a good standalone, knock sensor and all the bells and whistles. Would I do a blow through on a carb one day, I would love to, that's if the sum of all the parts is low enough to justify the experiment.

Such words are hard to read in the same sentence. But thats a thread in itself.

A carb only 'meets' a standalone on a fixed set of variables. Air/water temps, elevation, etc change constantly. EFI corrects for all, maximizing potential otherwise lost on a static carb. Carbs are like 8-tracks. They do the job but not well by todays standards.

Read the actual sentence "For me a carb works awesome on my camden"

The carb suits the camden very well, almost ideal as the fuel (especially premix) helps lube the blower. Now I didn't say the camden works awesome, it does it's job well, but is sure doesn't have the potential of a good efi turbo setup. It is simplistic and makes for good torque and an entertaining daily driver. Don't get going on the blower vs turbo debate, been there done that.

I did. I was implying that the camdens such a huge negative its hard to see awesome in the same phrase. It only work well as a heater. As a supercharger it fails miserably. The only gain is mid-range torque. Most cars dynod made less peak HP/tq than they did without the blower. Or the blower imploded before they got the chance to. But thats a thread itself, mostly covered already. See blue's car for prime example.

Obviously not speaking from personal experience.

Yes, i am. Probably more than anyone else with regard to supercharging rotaries on the forum. Ive dealt with easily 7 different camden cars directly. All were a complete waste. 4 blower failures as a result of using their own pulley suggestions... +15whp and less torque throughout the powerband than a stock turbo...People made more power just porting than the camdens dyno. Search for 'sonicrat' and you'll find my experience. Also check out codeblue/pianoprodigy/greek/etc. It all has been well documented.

Whenever someone wants to do something to their car and asks for advice, it ends up getting clusterfucked. Why is that?

Both systems can make your asshole clench tight enough to destroy itself. What does it matter?

Build your cars and have fun with it.

Rx7 club has a way of turning shit into "I can pee farther than you can".

In some cases:

"I know this guy who can pee farther than you can"

"I seen this person on the interwebs pee farther than you can"


NOBODY CARES.


Honestly, i dont care what you do to your car as long as it's not stupid. Like putting a gt42r on a bone stock n/a engine with only an fmu and cranking up the boost...... A blow thru carbed and boosted rotary is something to be proud of because it's cool. Secretly, i've always wanted to put a carb on my n/a. Just for the "that's cool" factor and to simplify things. Will i ever do it? I have no idea. Circumstances and budget change for me constantly.

this is my setup
 

it runs fine 252 hp at 8 psi