1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Renisis with a carb?

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Old 06-02-05 | 04:14 PM
  #26  
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I have nothing but problems with my Holley. I've tuned and tuned and tuned and that bitch will start to spit and sputter at the nearest sight of a hard corner, be it right or left. But I've got a Sterling on order now so problem solved.
Old 06-02-05 | 04:25 PM
  #27  
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51 IDA on a renisis bridgey would be absolute heaven...
Old 06-02-05 | 07:08 PM
  #28  
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Thumbs up Look into a Weber 55 DCO

This sounds like a huge carb but, it works really well. If you have the higher compression you might as well make as much power as possible. The carb ships with 48mm chokes just use a smaller choke to fit your application. Very streetable and awesome high RPM power.

Good Luck I would love to get a hold one of those engines for my daily driver.
Old 06-02-05 | 08:21 PM
  #29  
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Originally Posted by Elysian
why not? i'm running a holley on my street ported 6 port right now, and besides beating the fuel pump the thing runs great. got it tuned in pretty well minus needing a new fuel pump, and its just got tons of power... very simple setup too... and my 600 cfm holley will flow as much air as i need for my NA 13B.... and i've only had the cornering problem with the holley on 1 single corner... i've taken some pretty hard ones since i got the car running, and its not had any problems with the exception of that one corner, which i'm not even sure was holley related, because my battery fell off the tray and pulled off the connector for one of my ignitors(luckily it was trailing, didn't effect a lot), but the car was running pretty rough until i popped the hood and discovered that, so i don't think it was holley related really... and mine doesn't have the race bowls from racing beat, its just a racing beat prepped 600 cfm... nothing wrong with a holley.

Mabey you just arent cornering hard enough LOL.

Overall, you can make more power with a weber carb than a Holley... PERIOD. A holley will get better gas milage usually though
Old 06-02-05 | 11:31 PM
  #30  
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I can get a Carter for free...... Thats my whole point of getting the engine. Its free. Just have to spend some money on pipes for runners and steel for flanges. I can mig weld, just have to borrow a welder from the shop I was working at. Again free.

I just want to MAKE it run. I dont care if its rich, lean, no power whatever. Just want to take something that wasent supposed to be there or do that and FORCE IT.......HA.


Plus ITS FREE........hopefully.
Old 06-03-05 | 02:36 AM
  #31  
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usually the guys who talk **** about efi are the guys who don't know how to do it...

more power
better milage
lower emissions (if you care)
MOST importantly:
more accurate fuel delivery!!!

don't be afraid of wires--if you ever wanna try it, i can help.
Old 06-03-05 | 02:55 AM
  #32  
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Its cool that you have connections to stuff like this. A Reni with a carb would be ungique but i personally would use an EFI setup with a good standalone ECU and maybe even find a way to make the secondary ports function properly (prolly even have the ecu control that if you get the right one) the possibilities are endless, weigh your options.
Old 06-03-05 | 02:55 AM
  #33  
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trust me, i want to try it. i would LOVE to have it. it IS N0T cheap. 600? my ***. if anyone can set me up (FEDS) with a full efi stand alone including manifold/ throttle body, harness, ecu, injectors, clips, map sensor, etc... for 600?... hell even 800 i'll fuggin do it in a heartbeat. i got my whole holley setup for 500 bones, bam on the car and cranks right up. i have a whole jet kit and probably 50 local shops that carry any part i need for it right here. the side draft before that, wasnt too much more, but a huge hassle for tuning and getting jets and e-tubes, air bleeds, etc.. with that. trust me, I WANT EFI!!!!!!!!!!! but it isn't worth the couple grand being thrown in to setting it up.
Old 06-03-05 | 11:11 AM
  #34  
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Originally Posted by hornbm
Mabey you just arent cornering hard enough LOL.

Overall, you can make more power with a weber carb than a Holley... PERIOD. A holley will get better gas milage usually though
i'll take u for a ride in it, and u tell me if i'm not cornering hard enough...
Old 06-03-05 | 11:39 AM
  #35  
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Originally Posted by GUITARJUNKIE28
usually the guys who talk **** about efi are the guys who don't know how to do it...

more power
better milage
lower emissions (if you care)
MOST importantly:
more accurate fuel delivery!!!

don't be afraid of wires--if you ever wanna try it, i can help.
Usually the guys who talk **** about carbs are the guys who don't know **** about tuning one.
Old 06-03-05 | 12:56 PM
  #36  
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usually.

but you can't argue with the facts. if carbs came even close to fuel injection, they'd be used a lot more these days. FI costs more because it's better. you get what you pay for.
Old 06-03-05 | 01:16 PM
  #37  
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How do you plan on running ignition? Does the renesis have the same hole for the CAS/dizzy as older 13b's?

If so, I'd recommend megasquirt with a 2nd gen ignition system. $140 for the megasquirt kit... make a few mods to the board and add a $15-20 vr sensor conditioner circuit, and solder up a wiring harness... and you have a full standalone EFI system for pretty cheap. Megasquirt is considered one of the easiest EFI systems to tune as well...

Trailing ignition doesn't work perfect yet (some instability in trailing split at low rpms), but leading does, and trailing will soon (as soon as I get around to finding/figuring out/fixing the bug causing the problem).
Old 06-03-05 | 02:49 PM
  #38  
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^ totally overlooked that point...

timing!! programmable timing that comes with an ems is way superior to dizzys...especially if you run boost through it.

muythaibxr-- it doesn't have a hole for the crank sensor. it uses one sensor and a new kinda wheel--kinda like the fd's. i would say just slap on an earlier front cover, but the waterpump/front cover bolts won't all line up. the water pump housing is now integrated into the front cover and is not a seperate unit anymore.

you might be able to use a different front cover, omit one of the bolts (the one at the top left), and just figure something out for the one water pump bolt that doesn't line up--a talented machinist could make that happen.
Old 06-03-05 | 03:04 PM
  #39  
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https://www.rx7club.com/1st-generation-specific-1979-1985-18/japanese-sa22c-renesis-308275/

Still has original Fly By Wire throttle and everything....I mean EVERYTHING, including the engine cover.
Old 06-04-05 | 08:23 PM
  #40  
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the threewhiteguys site is a dead link
Old 06-04-05 | 08:30 PM
  #41  
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Running a Renesis with either a carb or aftermarket fuel injection is no different than running any other engine with either one. Megasquirt would be easy to do. Since the Renesis uses a crank triggered ignition, a 32-1 trigger wheel could be made to fit very easily and still use the stock pickup. Then just use a different form of ignition through Megasquirt such as Ford EDIS or GM HEI. We are only talking about a few bukcs in parts so don't think this is complicated to do. Just run no timing split. You won't notice it anyways. Big deal. Megasquirt would be a very cheap and easy solution and it would be far cheaper than any carb or any other standlone system. As for the drive by wire, just install a conventional throttlebody. Simple. I don't see why it is an issue or expensive for that matter.
Old 06-04-05 | 10:45 PM
  #42  
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Originally Posted by rotarygod
Running a Renesis with either a carb or aftermarket fuel injection is no different than running any other engine with either one. Megasquirt would be easy to do. Since the Renesis uses a crank triggered ignition, a 32-1 trigger wheel could be made to fit very easily and still use the stock pickup. Then just use a different form of ignition through Megasquirt such as Ford EDIS or GM HEI. We are only talking about a few bukcs in parts so don't think this is complicated to do. Just run no timing split. You won't notice it anyways. Big deal. Megasquirt would be a very cheap and easy solution and it would be far cheaper than any carb or any other standlone system. As for the drive by wire, just install a conventional throttlebody. Simple. I don't see why it is an issue or expensive for that matter.

An even better solution for spark would be to use the stock crank wheel with msns-extra's wheel decoder code, and run a 2nd gen or 3rd gen set of ignitor(s) and coils.
Old 06-05-05 | 03:07 AM
  #43  
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That's true. Much hotter spark. Didn't think of that. It's actually easier that way.
Old 06-05-05 | 12:58 PM
  #44  
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Fuel injection all the way. You can pick up a Microtech lt10 from Sammy (aka ebargain on ebay) for around 800 USD. You'll get much better performance with efi and the added gas milage is just a bonus.

I picked up my microtech ltx8 with the bosh coils for 650.00 USD. A couple hundred cheaper than a carb set up IMO.
Old 06-05-05 | 01:41 PM
  #45  
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^ i've got sam's car at my house right now
Old 06-05-05 | 02:01 PM
  #46  
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Originally Posted by RotaryRevn
Fuel injection all the way. You can pick up a Microtech lt10 from Sammy (aka ebargain on ebay) for around 800 USD. You'll get much better performance with efi and the added gas milage is just a bonus.

I picked up my microtech ltx8 with the bosh coils for 650.00 USD. A couple hundred cheaper than a carb set up IMO.
i got my racing beat manifold for around 200ish new, i can't remember the exact price now, and i got a holley carb on ebay that needed rebuilding for 45... 600cfm carb... got a rebuild kit for around 45 as well... all i needed after that was an upgraded fuel pump, got one at schucks for 37 bux, flows 32 gph, 4-7 psi... works great, and i didn't even spend the 650 u did... but in all honestly i'd rather be fuel injected right now... probly gonna be going megasquirt in the very near future
Old 06-05-05 | 02:11 PM
  #47  
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Holley, Weber. Thats it?

What about Edelbrock? Frig, Edelbrock was the easiest 4 Barrel Carb I've ever had the pleasure of working with. AND it was totally cheaper than Holley new. Works fan-friggin-tastic on my 13B street port. Mikuni makes a mean carb also - easy to mod and get parts for. Webers you have to order, then order the parts for it. Demon carbs are wicked awesome, but a little expensive. Just a little. A nice Edelbrock with mechanical secondaries would make that Renesis like move like Genesis.
Old 06-05-05 | 02:15 PM
  #48  
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i put an edelbrock on my old 73 el rustino with a 283 on it... didn't have to tune crap, slapped it on and it worked... a 650 cfm edelbrock... big carb for that motor but it gave it plenty more power
Old 06-05-05 | 08:03 PM
  #49  
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Originally Posted by GUITARJUNKIE28
^ i've got sam's car at my house right now

really? what's it doing over there?

I've just never been into carbs. I know some guys love them, and I wouldn't mind running one on a 4 port 13b motor, but on a renesis or turbo car, I say go fuel injection. I've heard plenty of people who try a carbed turbo set up go to fuel injection but I have never seen someone running a nice fuel injection set up say I want to switch back to my carbs. Just food for thought.
Old 06-05-05 | 10:49 PM
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Originally Posted by Elysian
i put an edelbrock on my old 73 el rustino with a 283 on it... didn't have to tune crap, slapped it on and it worked... a 650 cfm edelbrock... big carb for that motor but it gave it plenty more power
I've got a 600CFM Edelbrock Mechanical Secondary on my RX-7 right now. Perfect size for my Port job.


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