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Secondary Injectors......How Much?

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Hi ,

I would imagine most esprit specialists would stock or be able to advise on this however I have seen them on PUK's website.The prices are on there too. (hope that reference is PC enough for others!!)

Like a lot of these things they will work well in conjunction with other mods.I think the injectors probably are a requirement when you start getting into larger turbo land ,bigger chargecoolers and the race chips.Don't think they are necessary with the less wild chips and standard turbo etc,but I may be wrong.

Sounds like you are not going to be satisfied until you have it all :) so I would say if it were mine;

  1. get it running right as stock ( is your chargecooler working,is your wastegate set,when was the last time the engine had plugs /leads/rebuild???)
  2. Induction mod and air filter
  3. exhaust and cat replacement
  4. Nr 2 or 3 chip and enjoy
  5. Then when you are ready Nr 6 chip, new stage 1 or 2 turbo,bigger chargecooler and secondary injector upgrade.

This is obviously after sorting your brakes and making sure the suspension is A1 .The second two you have already done I guess so I would attack Nr 1 and then go shopping with about

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Hi Rich,

From my point of view its perfectly right what you are saying.

The higher flow secondaries are only needed if you have some mods like larger turbo and chip #5 or higher installed.

With a slightly modified engine like higher flow exhaust, higher flow cat (or no cat) and high flow air filter (K&N) and ram mod along with a chip #2-#5 you will not very likely run into lean conditions at high boost/rpm.

Even with #6 fitted it will not necessarily need higher flow secondaries, if all other parametres are spot on, like fuel filter, fuel pump, fuel pressure regulator ...

However it will not hurt adding high flow secondaries with chip #5 and higher.

Cheers

Marcus


Marcus

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Gareth,

No,if your existing pump is working as it should then it will be up to the job.If you think it isn't then I would just replace with a standard one. There is no need for a bigger pump as the ECU chip and bigger secondary injectors will facilitate the extra fuelling needed when you get to chip 6 installed.

It goes back to my original comment really as Marcus has just said,that it is important to make sure that your existing engine is in good condition with the fuel pump/filter/regulator all up to Lotus std spec.

Once you have a baseline its time to start bolting the bits on :) ....

Rich

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Mangel is spot on. Visit Dermots site. Loads of information.

If you want to purchase injectors, then you can get the at WC as well:

http://www.wcengineering.com/index.html

Exchange rate makes this the most cost effective option presently.

Edited by rocket63

Caught between a rock and a hard place in a catch 22 situation, So its 6 of one and half a dozen of the other. Your damned if you do, but your damned if you don't so shut your cock!!!!!!!!!!!

Lotus Espirt Turbo S3    

Lotus Esprit S4 

Lotus Elise S2 Sport 130

pig_zps6d7342f1.jpg

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Cheers guys, you are giving sensible advice.

Dermot

PS. Freescan users can check the % Duty Cycle (DC) on their secondary injectors at WOT. The equation to convert the injector pulse width to a % DC is in the Freescan manual. It is recommended that you don't want more than about 80% DC on injectors.

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I use BOSCH injectors.

here are the details, they have just about every flow rate you could need...

For the Primaries I bought the 36lb/hr (370cc/min), LOW impedance

"Peak and Hold" Bosch Ford injectors .

Part # Bosch/Ford E5ZE

They were $46 each and are the same flow as the stock Lotus primaries. You'll need 4

For the secondary (plenum) injectors , I went with a little larger 19lb/hr

(200cc/min), High Impedance "Saturated" Bosch injectors

Part # Bosch 0280150556-D5B-19lb* He sold me two for about $26 each.

These are larger than the stock 190cc/min injectors. You'll need 2 of these.

I bought them from http://www.fiveomotorsport.com/

These are very good injectors, though RC Engineering claims their LUCAS injectors (same as John Welch's WC Engineering injectors) are slightly better, but even they will admit that the BOSCH are very good. Make sure you Let Bruce at Five-O know that it is for a Lotus Esprit.


Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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Travis - what chip are you running and turbo?

I have the #2 stumble reduced S4s chip and the #4.

Stock Turbo

Stock engine

So I bought the stock sized BOSCH injectors, with the exception that I went 10cc/min larger on the secondaries, which is a very small percentage difference.

The BOSCH are much better than the stock Rochester injectors, and about half the price of the RC Lucas injectors.

I'm very happy with the #2 chip (thanks Sanj), and the injectors from Five-O Motorsport.


Travis

Vulcan Grey 89SE

My Lotus Photo and Projects Album

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As im doing alot of modifications to my S4 i think it would be a wise idea to change my injectors and upgrade the fuel pump.

How much would i be looking to pay for a performance fuel pump and what is the best make?

Who is the best supplier for this?

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If you are after a new pump (with assembly) ,i have a brand spanking new one sat in my garage ,so if you are in need of it just give me a shout.

Cheers

Nick S4s


Simplest things first.

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Walbro is the make most bandied around at the mo'

I have a friend who imports equivalent from US, He just needs to know the flow rate required to give a price.

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wallbro high output fuel pump 255 LPH HP

GSS340M-400-835

$119

www.nolimitmotorsort.com/walbro

http://www.fiveomotorsport.com/

the adress in the states for injectors

or the ones from PUK www.freudhoefer.de

i believe they are (or were) €195

gr Rens

Edited by rens914

researche is something i do when i don't know what the hell i'm doing

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