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RS02

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About RS02

  • Rank
    Dare to Be Different

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  • Map Location
    Holland Michigan
  • Occupation
    Student

My Cars

  • Zcars Owned
    240z
  • About my Cars
    VIN:HLS30-36897. A 240Z with L28 engine, twin su and E31 head. Rebuild in progress...

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  1. I wish I had a set of normal carbs... The set I have is not in working order and that's why I bought the rebello units in the first place.
  2. I was looking at different posts on the forum and from what I can gather you are right, the spring controls the piston position, the damper controls the rate which the piston moves at. The picture was from an old article for tuning those British H2 or HS2 carbs. The stockers are not in working order. I think I might try to run without damper or even change the needles to the stock ones that I have. At this point I think I'll try with the resources I have here and see how they changes things.
  3. This is where it causes a bit of confusion. I searched this form and found in another post that slow the rise of the piston actually richens up the mixture. The "more piston raised more fuel" method is only true when the engine is at WOT. Running no oil and light spring will actually cause the car to run bad at any other throttle position besides WOT. I am running straight SAE 20wt oil (3-in-1 small engine oil), I can lift both pistons all the way up and both dampers are working to make them rise slow and drop fast.
  4. I believe that they have been bored out to 50mm and it came with a custom ground needle... The needle looks like quite a bit of material has been taken off when compared to the stock SUs I had lying around.
  5. Thanks for all the input, so far I have checked float level, synced the carbs, set idle mixture, set off idle balance, The car is still too undrivable for me to really get it on the road to get it tuned right.
  6. Well sir that diagram you posted was for a down draft carb.
  7. Well thanks for the reply. SU carbs only have 1 circuit though. It does everything including idle.
  8. Do you mean raise the needle by the set screw? That would mean that the idle mixture would be even richer than before right?
  9. I've been battling with my 71 240 recently to get it running right. I spent about 4 years working on the car and the engine, and this is the first time I got it to run somewhat right. Here's what I have: freshly rebuilt L28 Flat top engine with E31 head CB performance programmable box triggering a MSD unit 230/460 cam (IIRC) "Rebello modified" carbs that I purchased from a form member a while ago. I think they are bored out to be bigger and I matched all intake ports. Zstory street header to 2.5" pipes to Zstory muffler in the back Now, here's the problem: I have installed a O2 sensor after the final merge in the header. The carbs had got a set of unknown needles that are ground down. The previous owner of the carbs told me that they were for a 3.1 stroker. When I get the car started and set the idle at 900rpm with the mixture screw 1.5 turns down, the car runs rich at around 12.5:1 afr. When I tried to drive it on the street and give it more than 1/4 throttle, the car stumbles badly and wants to die. This would indicate that the carbs are running waaaay too rich right? But, my afr gauge tells me otherwise. It keeps climbing all the way to 15. I can hear exhaust backfiring at this point. I thought that the ground down needles would make the engine run super rich off idle, but I think the engine is doing the exact opposite. So I started diagnosing: 1. I checked the timing, it's at 14 idle 34 total. 2. I checked the plugs, they are dry fouled because of the idle mixture (brand new plugs before the run). 3. I checked the carbs, they are clean inside with piston return springs and 20wt oil. 4. I checked the fuel bow with float-sync, both level are correct and remain steady when I rev the engine. 5. I checked for vacuum leaks, all vacuum ports are blocked off, only one is plumbed for MAP sensor. I am at a loss here. I have searched the internet and this very helpful form for information regarding this problem. But I haven't yet found a solution to the problem I am experiencing. How can a needle that is supposed to be super rich cause a engine that is too small for it to lean out? (Attached is the timing map)
  10. View Advert Cylinder Head and Intake manifold for sale Late model E88 head with bigger exhaust valves. -150 obo Matching E88 intake. -30 obo The head does not come with cam towers. Only valves. It'll definitely need a makeover. It's taken off of my 71 240z and stored on a shelf. My 14 in wheels are also for sale. make an offer. Buyer pays shipping. Advertiser RS02 Date 01/20/2020 Price Category Parts for Sale  
  11. THIS ADVERT HAS EXPIRED!

    • FOR SALE
    • USED

    Late model E88 head with bigger exhaust valves. -150 obo Matching E88 intake. -30 obo The head does not come with cam towers. Only valves. It'll definitely need a makeover. It's taken off of my 71 240z and stored on a shelf. My 14 in wheels are also for sale. make an offer. Buyer pays shipping.

    NO VALUE SPECIFIED

    Indianapolis, Indiana - US

  12. View Advert 15X7?wheels 15X7 or 8 wheels. 4x114.3. I just need these gone so name a price and you pay the shipping. I'm located in Indianapolis. Advertiser RS02 Date 01/03/2020 Price Category Parts for Sale  
  13. RS02

    15X7?wheels

    THIS ADVERT HAS EXPIRED!

    • FOR SALE
    • USED

    15X7 or 8 wheels. 4x114.3. I just need these gone so name a price and you pay the shipping. I'm located in Indianapolis.

    NO VALUE SPECIFIED

    Indianapolis, Indiana - US

  14. Yes there's a RB20e and a RB20de. RB30e is the only 3.0 as far as I'm aware. Problem that I can see is mainly chamber volume because rb30e has Hemi style chambers. Would require custom pistons. Sent from my iPhone using Classic Zcar Club mobile
  15. His video and blog gave me the idea! I'm in the process of rebuilding my front suspension. As soon as I finish this car I'll look into getting a rb30e head. I can only read some of the kanji so it's hard trying to figure out how he did it... But yeah thanks for mentioning him. His my #1 source for gathering information about this swap. Sent from my iPhone using Classic Zcar Club mobile
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