RX-7 Chris

iTrader: (19)

also make sure you check where the diaphragm was removed.

RX-7 Chris

iTrader: (19)

If you're still having problems, PM me and I can get you my number.

FCinWV

iTrader: (8)

ok thanks man

rxtasy3

iTrader: (2)

here's a link to my photobucket where u'll find pix of my rb holley setup so u can see how they do the throttle hookup, omp linkage and the lines to the primary bowl.

http://s83.photobucket.com/albums/j2...cpZZ2QQtppZZ20

FCinWV

iTrader: (8)

your OMP line is set up so much better than what mine is. XLR8 has me pretty set on going premix from now on. I'm going to try to find a better carb, cause right now its running smooth but it has no top end whatsoever. Guess those secondaries had a purpose haha.

RX-7 Chris

iTrader: (19)

Here are pics of my brand new at the time RB Holley:

rxtasy3

iTrader: (2)

nice. 465cfm right? and u ran the omp line the same as i did mine. if u don't plan to run vac adv u'll need to cap off that port on the metering plate.

RX-7 Chris

iTrader: (19)

That is the 465 RB SP 12A setup.

FCinWV

iTrader: (8)

thats a clean setup.. makes me want to pull my motor and clean the mess under my hood.

84stock

iTrader: (5)

Why not put a vac secondary diaphragm back on your carb and try it out.

I may have a spare kicking around....

FCinWV

iTrader: (8)

Yey man that would be awesome.. id like to run this holley and make it work till i eventually go with a T II setup

84stock

iTrader: (5)

PM me your address and I'll see what i can round up for you.

XLR8

iTrader: (52)

Thanks for helping my friend out fella's. He's got one clean Fb, and a great project.

FCinWV

iTrader: (8)

well heres an update... my vacuum advance wasnt hooked up so I Td them together and ran a hose to the vacuum fitting that was capped on my intake manifold. Im thinking whoever put the carb on, advanced the timing to compensate. Cause i cant get it to idle under 1k right now.. so im going to put a light on it after work and see what I come up with. Ill try enabling the secondarys after that to see if the sputter it had is gone.

FCinWV

iTrader: (8)

Also I have the stock intake manifold with no spacer...what does the spacer actually do ? and do i need it to make this thing stop sucking and actually run like a rotary ?

84stock

iTrader: (5)

Vac diaphragm is in the mail, I put a suitable light spring in it for you (the all important retaining clip is taped to it and I included the screws since I figure they are likely missing on yours).. Shipping was $10, will take approx 10 days. Cost to my fellow rotary enthusiast for part and shipping, freebie, just follow the guidance and get it working right!

The carb spacer kills the pulse and helps the holley work the way it is designed. You only need a 1/4" open spacer.

rxtasy3

iTrader: (2)

vacuum advanced does not go to the intake. it connects to the port on the side of the metering plate on the carb. went back and looked at the pix of ur carb and vac adv goes to the one that comes out at a 90 degree on ur carb.

FCinWV

iTrader: (8)

You are a god among men, I cannot thank you enough ! I will work my *** off to get that carb on the level.

FCinWV

iTrader: (8)

Ah. a couple of my rotay buddys here at home pointed out the vacuum line on the manifold toward the inner side. I suppose that would be why my idle wont go under a grand. Ill just take a picture after bit to make sure its correct.

RX-7 Chris

iTrader: (19)

rxtasy3 is right. you are probably getting too much vacuum where you have it hooked up.


This should help you: http://www.racingbeat.com/manuals/18009%20Holley.pdf

FCinWV

iTrader: (8)

thanks for that link. wow. judging by my 4 symptoms my solutions would be

Rough idle or pulse - the spacer

High idle - actually put my vacuum where it should be lol

Hesitation and stumble when accelerating - Im betting my float level is way low

No high RPM power (even when the secondarys where intact)- im thinking my float level is doing this too

My next question is will the secondary diaphragm eliminate the need for the mechanical linkage

rxtasy3

iTrader: (2)

ur hesitation/stumble on accel is probably a worn cam for the accel pump. the sec diaphragm works the secondaries at a given amount of vac. if the carb has a mechanical linkage then it wasn't vac operated to begin with. usually what ppl do to make them mechanical is to put a screw in it.

FCinWV

iTrader: (8)

well it was rigged up just like the picture on page 1 of that brand new holley and it had a secondary diaphragm. Talk about a crash course in carbs haha. If all this doesnt fix the stumble, Ill go with your advice and Ill order the assorted cam set off holley for like 25 bucks.

Jeff20B

iTrader: (13)

84stock is awesome when it comes to stuff like this. He helped me out with a pulley for my Camden; which works perfectly by the way. It was a -9 and finally made my 5" come alive. The previous pulley was a -7 and was wrong for a 5", but works well on a 7". Anyway it works so well now I'm planning my next engine for the REPU based around how well it works on the test engine in the GLC.

FCinWV

iTrader: (8)

alrighty. I'm so anxious with this thing I went on my lunch break and corrected my vacuum advance.. just so I'm sure.. this is correct right ?


btw rxtasy I watched your short drive video.... mine runs nothing like that. that quick rev you have up into the 7000 area..mine would be struggling to get thru 4500 at a slow lugging pace. Ofcourse I imagine some that that is your lightweight flywheel.