Spinner-D(eluxe)

OK so I finally got the Kit installed. It’s Racing Beat's Holley Intake/Carb kit made specifically for the 13B 6 port. I have Racing Beat's Street Port Exhaust on the car, with Presilincers, and have no exhaust leaks, or intake leaks, and the ignition seems to be working properly, and the engine runs really smooth, but it just doesn't seem to have the power it should. The only thing I can think of is maybe I need to go up 1 or two jet sizes. I don't have any way to test weather the car is running lean or rich, but I have a feeling it’s running lean.

Does anyone have this kit installed that might be able to help? Or any Holley experts out there?

eddierotary

iTrader: (7)

i gess you can get some jets and try. those holley jets are cheap and you can find the any performance places or in summit racing

KehoeAutomotive

I have the kit installed on a 13B of mine and it works perfectly!

if you are having a power problem I would suggest you check float level and make sure you are not running rich.

I would suggest that you lean the car out a little to see if you pick up any power.

You could install a fuel air ratio mixture gauge that could help.

Also make sure that you are sure that it actaully had less power and it's not just a feeling.

Spinner-D(eluxe)

It's not just a feeling of less power. Racing Beat claims 180 HP with my setup, but in every gear It takes longer to wind out the engine. I used to almost not even need first gear, but now even taking off in first gear it takes 3 or 4 seconds.

Did you change jets, or use the ones that came with the carb?

Did you feel a power gain after you got yours installed? I realize most of the power gain will be at high RPM, but still it should be faster than my Rav4.

XLR8

iTrader: (52)

What kind of fuel pump? fuel pressure? Noticing hesitation? Unusually poor mpg? Like it was said before try leaning it out with jets and see what ya get. I wouldn't mess with those A/F gauges. They are very general and arn't worth much for tuning.

Good luck

Spinner-D(eluxe)

The fuel pump I am using is a Holley Blue, and I have the regulator set at 6psi as instructed. I did the float bowl level test on each bowl, and made the adjustments. Fuel pressure is good, and there is no hesitation. The engine runs smooth, and remains smooth through the entire RPM range. I do notice I can rev the engine up to 8,000+rpm now. Before it was hard to go past 7500, but maybe that was because of the EFI computer limiting it.

I do have the Street port exhaust system with long primaries as they call it (the exhaust is duel pipes all the way back to the muffler where it collects and goes into the muffler.) Of course I do have a header installed. Is it possible the higher flow exhaust could be the culpret (maybe not enough back pressure)?

Just a quick question... I did have my coils out of the car, and I assume they are both identical. Is there any difference between the leading and trailing coil, because I could have mixed them up.

I am going to order an assortment of jets and try smaller and bigger to see what results I get.

Is there any way to guess if I am running lean or rich? Under deacceleration after pushing the car hard, i do get a series of small even backfires (not a loud single backfire).

REVHED

Popping on deceleration usually indicates a lean condition. Honestly, the best thing to do would be to get the car on the dyno and have the carb dialled in properly with a wideband.

Spinner-D(eluxe)

YEa thats what I was going to do. There is a place called Carb COnnection here in Kirkland Washington. Anyone ever hear of this place?

KehoeAutomotive

I ran the jets that came with the car and if anything I had to lean the setting out a bit.

Did you try to adjust the carb yet? Are you unable to richen the mixture up a bit?

Is it too rich? Any black smoke?

RotorMotorDriver

iTrader: (1)

I believe thats where rx7passions turbo 2 conversion car was stolen from and the shop denied knowing anything about it.

However, Im thinking maybe its your exhaust. The dual pipe exhaust is meant to maximize power in the upper RPMs where a street ported engine makes the best power, and the single pipe exhaust is maximized to make power in the mid range where the stock port makes the best power. So, you have street port exhaust on a stock port car, and I believe you used the stock port intake too, did you not? Something tells me that it might be the exhaust. Just an excuse to get that engine ported!!

~T.J.

Spinner-D(eluxe)

Well you may me right. I still think the car should be faster than stock with my setup (RB claims 180HP), and they say even using the street port exhaust on a non ported engine should give good results (at least better than stock).

If it comes down to porting the motor, I guess thats what I'll have to do.

Oh and if I went to carb connection I obviously wouldn't let them dyno my car without getting to watch. No way I'm letting someone keep my car overnight.

Hey TJ do you want to come over and see the car? Maybe you can go for a ride with me and let your intuition diagnose my car. heh.

Spinner-D(eluxe)

I checked with Racing Beat and the recommended Exhaust system for my setup is the long primary street port exhaust (which is what I have).

Are there any other dyno equiped tunners close to Woodinville other than Carb Connection? Should I be weary of giving them my home address?

red13brx7

I think it might possibly be that your secondaries aren't opening???? I have the set up on my car and it rips. It is awesome. I converted to mechanical secondaries. I would check that.

Spinner-D(eluxe)

I was going to try doing a test on the secondaries, buy tying a string around the actuator rod, and seeing if it moves down the shaft after driving the car. How else would you test the secondaries?

How did you convert to mechanical secondaries?

red13brx7

i put a bolt through the linkage at just the right spot that it would open at about 3/4 throttle and become fully open exactly when the primaries where fully opened. Not too hard to do.

red13brx7

i put a bolt through the linkage at just the right spot that it would open at about 3/4 throttle and become fully open exactly when the primaries where fully opened. Not too hard to do.

813KR$

the screw trick!

http://www.tamparacing.com/gallery/s...t=7&thecat=998

Jeff20B

iTrader: (13)

The screw trick is cool. It looks like you know about the leaf trick too!

813KR$

Leaf trick is phat yo!

rotarygod

iTrader: (1)

That is just about backwards. The Racing Beat long primary system which he has will make more power everywhere in the rpm range than any of those other systems. It doesn't matter if the engine is ported or not. That system rocks. I had it for a while and I really miss it. Every other system lacks so much power compared to it. Yes, even the low end. Especially in the low end. His prblem is most likely not an exhaust issue. We don't want him to change it and be even slower still.

There are only a couple of things it can be. It is going to be an issue with something that was changed not something that was already on the car. It will be either the fuel pump/pressure, carb tuning, or ignition system. It is probably the jetting of the carb though.

Spinner-D(eluxe)

Fuel Pressure: Getting good strong pressure, and turning it down to 6psi as instructed by Racing Beat.

Carb tuning: Only thing I did was adjust the float bowl levels as instructed, and turn the idle screw to idle the engine down to 1000rpm (I should turn it down to 800-900rpm according to the instructions, but this wouldn't cause a huge performance issue).

Ignition System: I'm getting spark on all plugs, and the engine is smooth but has what I consideer a normal amout of vibration (a bob here and there). It's all stock, and I checked the timing and it's right on.

I am going to concentrate on chcecking the secondaries, and if that doesn't make a difference I will check the jetting. How do you and others have their Holley Jetted? I assume there are 6 jets total (2 idle + 2 primary + 2 secondary). Is that correct? Can someone direct me to a tech manual on my carb? Does anyone know the model number of the Holley Carb Racing Beat starts with?

It is similar to this: http://holley.com/HiOctn/ProdLine/Pr...C/f0-4160.html

red13brx7

My car did the same thing I was disappointed when I put it on then I figured it out and after you get them working you better hold on when they open up on you. Its niiiccceeee...!!

Spinner-D(eluxe)

I do have some good news, and it doesn't have anything to do with Gieco. I got my Racing Beat Holley Carb manually opening my secondaries using the screw trick, and the car does Rip!!! It sounds really realy good too with the RB Street port long primary exhaust! My grin is circling the globe right now. I remember the time I had a 93 rx-7 and now my 1st gen is getting almost as fast. It started out as a GSL-SE and now it's a gutted little 2000lb MAZCAR beast. hehehe.


Thanks everyone for helping me solve the problem! Off to the Dyno soon, and I'll post a chart. I'm not sure what the numbers will show but I know what a 6 second 0-60 felt like in my 3rd gen back in the day, and this feels close.

I do plan on fixing the actuator so the secondaries are operated off of vaccum, because the screw trick doesn't make for a smooth transition between the primaries to primaries and secondaries open.

Tom

That's great! Have fun and show us your slips!

RotorMotorDriver

iTrader: (1)

Im glad you got it figured out man! Now work on that ignition setup and get it completely buttoned up and done!

~T.J.