Hard to start car in mornings, and wanting to upgrade old stock flat top SU's

[CroS13]

So i spent last night reading through all 13 pages in the fuel systems forum, and didn't really find a answer to what i was after.

 

Here is my Dilemma, my 260z has standard flat top SU's. It is a nightmare to start first time round, need about 5 to 6 cranks for it to fire, then it misfires and runs on 2 cylinders for about 1 minute before it slowly clears up and comes good. any hint of throttle just floods the motor, the choke doesn't seem to do anything, however when warm seems to work. I have never worked on a Carby car before, so its all new to me. once warm car starts no drama.

 

I have replaced rotor button, dizzy cap, leads and plugs, which has fixed a misfire issue i had under power, and apart from the dizzy and points which i have not replaced, the ignition side is fine. So i turn my attention to fuel side.

 

Firstly everyone says that the best option is to replace the flat tops for round top non pollution gear carbs, and this is good and fine, as i do want to discard of the emissions gear to tidy up the engine bay. however my future plans for the car, being a project weekender, can be summed up by my philosophy:

 

For every tree your Prius saves, my Datsun is going to kill 3.

 

I wish to eventually have a fully built motor, big dirty cam, and triple carbs of some sort, with total disregard for noise pollution, emissions or fuel economy.

 

So here is my dilemma, i am not at that stage yet, for now i want the car running right. My car had not been driven or started in 10 years prior to buying it, and Ive been slowly fixing it up to get it in a running state.

 

I don't really see the point in getting the flat tops rebuilt or re kitted when i will be binning them in the long run anyway.

 

Everyone says to get the round tops, but eventually i wish to to triples, possibly triple webers. so is the $200-$400 ebay asking price for a pair of round tops wasting my money, when i will most likely need to rebuild them anyway, and in a few years they get binned too? has anyone ever done a triple SU set up on a L series motor? I haven't read about any, so i guess its not worth it?

 

Now i know Webers are now made in Spain, has anyone used these carbs? and how do they compare to the old Italian ones? There is a Redline conversion kit on ebay for $700, and the triple Weber kit is double the price. Is it worth it to buy the twin Weber conversion kit, put it on the car, enjoy, and when the time comes to rebuild the motor and go triples, i only need 1 more Weber and a Redline manifold which is what $400?

 

Or is it a must to buy original Italian gear? there is a Italian Ebay seller selling reconditioned and re kitted Triple kits for around the $1000 mark, in the long run, is the dearest way the cheapest way?

 

Thoughts?

 

Rudolf.

[be-zed]

As it gets colder ,the worst your starting problem will become.

You sound like you have already made up your mind what way you want to go .

So just do it . It will stop the starting problems when tuned .

I did the same and it was not a bad idea . Some thirty years on it seems very cheap now.

Yes I still have the car. Nothing sounds like triples on a L series motor (EXCEPT possibly a XJ13 Jag with 6 Webber's) at full noise or just idle.

Triple SU are possible but to date there are only 10 manifolds  in Australia (very rare)  and can not be bought new. They are better than twin chokes down low and mid range (4500-5000 rpm) using Volvo 1" 3/4  SU , but that is where it ends. If you wanted this set up I may know where the dies for the moulds for castings are.

[neRok]

If its a project car and you want to learn things, buy a rebuild kit and watch some videos/read some books and fix it. The cost will be minimal, but you will learn a ton.

[C.A.R.]

So i spent last night reading through all 13 pages in the fuel systems forum, and didn't really find a answer to what i was after.

 

Here is my Dilemma, my 260z has standard flat top SU's. It is a nightmare to start first time round, need about 5 to 6 cranks for it to fire, then it misfires...... blah blah blah blah...

 

 

Buy new 45mm Weber's/OER's/Mukuini's/ Dellorto's & manifold.

Get Les and/or Pete to set them up & tune them.

Have many Eargasms.

Profit.

[Retro Z]

Do a search i posted a thread asking a similar question about triple carbs a month ago.. and there was some good feedback.

[Agno]

The dual weber conversion kit is for downdraft weber dgv's. triple weber kits use dcoe's so they are a 100% different carb with no interchangeability whatsoever.

 

In a good mood today I see lurch

[CroS13]

Buy new 45mm Weber's/OER's/Mukuini's/ Dellorto's & manifold.

Get Les and/or Pete to set them up & tune them.

Have many Eargasms.

Profit.

 

Oh how the shoe is on the other foot! Over on the Silvia Forums I'm usually the one acting like a jerk posting similar photo's and bashing noobs for not searching when its either SR vs CA or "how can i make my non turbo SR20 go faster" 

 

Haha now i know what its like being on the receiving end! And im sure your frustration is the same one i have, where noobs come in and ask questions that have been asked 1000x before! Yes, everything i read, people were saying to go triples and the debate was either 40's or 45's. But everything i read related to people with built motors, no one mentioned anything about triples on a stock motor.

 

Im guessing if i get them set up and tuned, with smaller jetting or whatever sorcery is done, even though my motor is standard, it wouldn't overfuel?

 

Ive heard the debate between 40's and 45's, and from what i can gather, the 40's are better suited to street work, 45's for all out power/top end? is this correct?

 

And lastly, would i be best off buying the kit Retro Z mentions in his thread, some people mentioned there are better manifolds available than the redline kits, what would they be?

 

So this:

http://www.ebay.com.au/itm/Datsun-Nissan-240Z-260Z-280Z-Weber-Carburetor-Kit-/271179817503?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f2393a21f&clk_rvr_id=471229996301

 

 

hang on a second they mention no chokes.... wait wut?

 

 

 

 

 

[C.A.R.]

So i spent last night reading through all 13 pages in the fuel systems forum, and didn't really find a answer to what i was after.

 

Here is my Dilemma, my 260z has standard flat top SU's. It is a nightmare to start first time round, need about 5 to 6 cranks for it to fire, then it misfires and runs on 2 cylinders for about 1 minute before it slowly clears up and comes good. any hint of throttle just floods the motor, the choke doesn't seem to do anything, however when warm seems to work. I have never worked on a Carby car before, so its all new to me. once warm car starts no drama.

 

I have replaced rotor button, dizzy cap, leads and plugs, which has fixed a misfire issue i had under power, and apart from the dizzy and points which i have not replaced, the ignition side is fine. So i turn my attention to fuel side.

 

Firstly everyone says that the best option is to replace the flat tops for round top non pollution gear carbs, and this is good and fine, as i do want to discard of the emissions gear to tidy up the engine bay. however my future plans for the car, being a project weekender, can be summed up by my philosophy:

 

For every tree your Prius saves, my Datsun is going to kill 3.

 

I wish to eventually have a fully built motor, big dirty cam, and triple carbs of some sort, with total disregard for noise pollution, emissions or fuel economy.

 

So here is my dilemma, i am not at that stage yet, for now i want the car running right. My car had not been driven or started in 10 years prior to buying it, and Ive been slowly fixing it up to get it in a running state.

 

I don't really see the point in getting the flat tops rebuilt or re kitted when i will be binning them in the long run anyway.

 

Everyone says to get the round tops, but eventually i wish to to triples, possibly triple webers. so is the $200-$400 ebay asking price for a pair of round tops wasting my money, when i will most likely need to rebuild them anyway, and in a few years they get binned too? has anyone ever done a triple SU set up on a L series motor? I haven't read about any, so i guess its not worth it?

 

Now i know Webers are now made in Spain, has anyone used these carbs? and how do they compare to the old Italian ones? There is a Redline conversion kit on ebay for $700, and the triple Weber kit is double the price. Is it worth it to buy the twin Weber conversion kit, put it on the car, enjoy, and when the time comes to rebuild the motor and go triples, i only need 1 more Weber and a Redline manifold which is what $400?

 

Or is it a must to buy original Italian gear? there is a Italian Ebay seller selling reconditioned and re kitted Triple kits for around the $1000 mark, in the long run, is the dearest way the cheapest way?

 

Thoughts?

 

Rudolf.

 

 

 

Oh how the shoe is on the other foot! Over on the Silvia Forums I'm usually the one acting like a jerk posting similar photo's and bashing noobs for not searching when its either SR vs CA or "how can i make my non turbo SR20 go faster" 

 

Haha now i know what its like being on the receiving end! And im sure your frustration is the same one i have, where noobs come in and ask questions that have been asked 1000x before! Yes, everything i read, people were saying to go triples and the debate was either 40's or 45's. But everything i read related to people with built motors, no one mentioned anything about triples on a stock motor.

 

Im guessing if i get them set up and tuned, with smaller jetting or whatever sorcery is done, even though my motor is standard, it wouldn't overfuel?

 

Ive heard the debate between 40's and 45's, and from what i can gather, the 40's are better suited to street work, 45's for all out power/top end? is this correct?

 

And lastly, would i be best off buying the kit Retro Z mentions in his thread, some people mentioned there are better manifolds available than the redline kits, what would they be?

 

So this:

http://www.ebay.com.au/itm/Datsun-Nissan-240Z-260Z-280Z-Weber-Carburetor-Kit-/271179817503?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f2393a21f&clk_rvr_id=471229996301

 

 

hang on a second they mention no chokes.... wait wut?

 

 

OK... If 'I' was in your position & wanting a hot road motor later on, I'd ring both Ash at MAS & Weber performance to get a price comparison on a complete set of 45mm Weber's. 40's will fall over at about 220hp, so they are not worth buying.

Specify the capacity & engine mods done to the CURRENT engine & get the Webers jetted (setup) to suit.

 

Then I'd order a Kameari 'Big Bore' intake manifold (which comes with a linkage kit), bolt it all together, fit it to the car (plumb it all up) and trailer it down to Les & Pete for them to get it running & tuned.

 

Simple.

If you can't do this, take up Golf or Marry Alibaba - you'd make a lovely couple.

 

Lurch.

[Scoota G]

 

 

 

OK... If 'I' was in your position & wanting a hot road motor later on, I'd ring both Ash at MAS & Weber performance to get a price comparison on a complete set of 45mm Weber's. 40's will fall over at about 220hp, so they are not worth buying.

Specify the capacity & engine mods done to the CURRENT engine & get the Webers jetted (setup) to suit.

 

Then I'd order a Kameari 'Big Bore' intake manifold (which comes with a linkage kit), bolt it all together, fit it to the car (plumb it all up) and trailer it down to Les & Pete for them to get it running & tuned.

 

Simple.

If you can't do this, take up Golf or Marry Alibaba - you'd make a lovely couple.

 

Lurch.

Lurch shall from this day forth be known as "Tweak"

[Zedman240®]

"Insert Micheal Jackson eating popcorn" pic here.....

[pauly_adams]

he is on fire, not seen his wrath like this for a while