Technical Fuel pumps? uprated for turbo owners (& mpi converts)

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Technical Fuel pumps? uprated for turbo owners (& mpi converts)

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OK I've read the threads on it but its never very conclusive.

I need to uprate my fuel pump as I had my car at rolling road to try and set it up and well 1bar fuel pressure and 1bar boost = no fuel, even with my MF2 set to 100% max which is 80% duty cycle it was dangerously lean, which is not good:eek: turbo owners take note, the guy who I was working with on this (http://www.tts-performance.co.uk/tts.shtml) thinks that the VAD set up at 0.6bar is really at the max the standard pump can cope with as the MF2 can only run an injector from 20-80% duty cycle and as its a light green Bosch injector it flows 400cc at 3bar, so much less on 1bar.

Fortunately with the pressure regulator built into the original throttle body it will regulate its self back to the 1.2bar I'll be setting it at at overcome the boost, and uprate flow as the Lambda and ECU will ensure thats OK.

I know that the punto 75/85/90 pump is the same pump and the centre can be removed and then used to replace the centre section on Cinq pump to uprate it, but is the Sei MPi pump a direct drop in to a Cinq pump as I don't see any difference in fuel tanks?

Reason I ask is that I am going to buy a new pump as its then a know quantity so fit it and leave, unlike a 2nd hand unit which may have covered huge miles and then have problems, seems to be lots of pumps listed on ebay for puntos and shop4parts only list punto pumps which leads me to think they fail more often than other pumps. I'll probably go for a Bosch one as I can get those direct from Bosch for employee prices through a friend though I can't find any Bosch part numbers that he needs to order it with, so some searching of net is in order me thinks.

PS TTS had a Lotus Exige with a type R engine supercharged fitted running 430bhp when i was there was a very impressive conversion, oh and some 1600cc V-twin motorbike that was also supercharged.

Aaron.
 
may have answered my own question as I checked and got this info from https://www.sapmotorparts.com

Fiat Seicento 1.1i 03/00-12/00 Injection Fuel Pump QFP701 £71.35 0.5 No Notes "1108cc,40kw,54hp,OHC,176B2000

Fiat Punto I 1.2i 01/98-10/98 Injection Fuel Pump QFP701 £71.35 0.5 No Notes "1242cc,54kw,73hp,OHC,176A8000
Fiat Punto I 1.4i 10/93-11/96 Injection Fuel Pump QFP701 £71.35 0.5 No Notes "1372cc,98kw,133hp,OHC,176A4000
Fiat Punto I 1.6i 04/94-10/97 Injection Fuel Pump QFP701 £71.35 0.5 No Notes "1581cc,66kw,90hp,OHC,176A9000"
Fiat Punto Cabrio I 1.2i 12/96-04/01 Injection Fuel Pump QFP701 £71.35 0.5 16v "1242cc,63kw,86hp,DOHC,176B9000

These all share the same part number of QFP701 whereas the Cinquecento and some Punto i.e 55 and 60 use QFP700 part number.

Fiat Cinquecento 903cc 04/92-09/94 Injection Fuel Pump QFP700 £72.01 0.5 No Notes "903cc,30kw,41hp,OHV,170A1046"
Fiat Cinquecento 1.1i 10/94-07/99 Injection Fuel Pump QFP700 £72.01 0.5 No Notes "1108cc,40kw,54hp,OHC,176B2000"
Fiat Cinquecento 899cc 03/92-02/98 Injection Fuel Pump QFP700 £72.01 0.5 No Notes "899cc,29kw,39hp,OHC,1170A1046"
Fiat Cinquecento 1.1i 10/94-02/98 Injection Fuel Pump QFP700 £72.01 0.5 No Notes "1108cc,40kw,54hp,OHC,176B2000

Fiat Punto I 1.2i 12/96-07/99 Injection Fuel Pump QFP700 £72.01 0.5 No Notes "1242cc,44kw,60hp,OHC,176B4000

Surprised to see that a Punto GT has same pump as Sei MPi tho!
 
Hi there,

I think this might help you. (see the attachement)

It's the fuel pump setup from the Rally Seicento.

Notice that it has TWO fuel pumps which are joined by a T-connector.

I hope this will help you or give you new ideas.

Regards,

Stef

P.s. 57***** part numbers are from Fiat Auto Corse and can not be ordered through dealerships. Just that u know.
 

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OK spoken to a nice guy Terry at www.fuelsystem.co.uk and gave him spec of car and what has been done and tures out a 3bar fuel pump from Escort Cosworth is straight drop in and delivers 3bar pressure which is exactly what my light green Bosch 300cc injector needs.

the pump its self is ITP050 @£80 +VAT plus I need an inline pressure regulator AIR044 @£45 +VAT tho managed to get 10% off and free postage so can't complain.

just need to measure up what fuel hose i need as want some nice blue cotton over braid stuff to replace the s/s over braid that I have at present plus an extra metal T piece to T in the fuel pressure regulator and hey presto should be able to set the car up to run 1bar boost comfortably.

Aaron.
 
custard said:
is that the standard VAD injector or have you changed it?

Well considering the two VAD converions I have privy to have two differnt injectors, so who knows.

Mine is a Bosch light green code 280 150 335 which flows 300cc but only at 3bar fuel pressure, on Emmas car she has what are know as Cosworth Dark greens, code 280 150 803 which i think flow about the same, but again all flow rates are published with 3 bar fuel pressure. So running it from a 1bar fuel pump really is asking for trouble.

So what i'll have is 3bar regulated going to both injectors but the standard SPi regulator set to 1.2bar just to overcome the boost pressure and make up for any rduction in flow it will have had over the years of use.
 
arc said:
aaron, the punto75/85/GT pump is also 3bar..and fits right in.. and prolly made by bosch.. same pump?


Yeah I know from the part numbers I put up above from SAP, but he recommends this pumps for what I have. It maybe that even tho the Punto pump is 3bar but flows less ltrs/per hour or whatever the other thing is they measure fuel pumps in than this pump, even on the Fuelsytem site they Punto pump is £72 so only £8 differance so not like he making loads more money out me.
 
J333EVO said:
Well considering the two VAD converions I have privy to have two differnt injectors, so who knows.

Mine is a Bosch light green code 280 150 335 which flows 300cc but only at 3bar fuel pressure, on Emmas car she has what are know as Cosworth Dark greens, code 280 150 803 which i think flow about the same, but again all flow rates are published with 3 bar fuel pressure. So running it from a 1bar fuel pump really is asking for trouble.

So what i'll have is 3bar regulated going to both injectors but the standard SPi regulator set to 1.2bar just to overcome the boost pressure and make up for any rduction in flow it will have had over the years of use.

Well, 280 150 335 is 170 cc/min and 280 150 803 is 310 cc/min, both low impedance (2.4 and 4.6 ohms respectively).

The extra injector should be first in line, then the 3bar fuel regulator and afterwards the spi TB, in order for all to get the correct pressure. Don't just T the line and connect the 2nd injector in parallel, you will end with a 1.2 bar system pressure again...
 
Asteris said:
Well, 280 150 335 is 170 cc/min and 280 150 803 is 310 cc/min, both low impedance (2.4 and 4.6 ohms respectively).

The extra injector should be first in line, then the 3bar fuel regulator and afterwards the spi TB, in order for all to get the correct pressure. Don't just T the line and connect the 2nd injector in parallel, you will end with a 1.2 bar system pressure again...

Where did you get the flow rates from because according to this http://autospeed.drive.com.au/cms/A_0102/article.html injector 280 155 355 is 300cc @3bar, impedance doesn't matter MF2 can run hi or low it adjusts itself.

The VAD set has the 2nd injector first anyway its just a matter of replacing the pump and uprating the fuel lines as not 100% sure that they are hi pressure pipes on there as 1bar as standard is considered low pressure.
 
J333EVO said:
...Mine is a Bosch light green code 280 150 335 ...

J333EVO said:
Where did you get the flow rates from because according to this http://autospeed.drive.com.au/cms/A_0102/article.html injector 280 155 355 is 300cc ...

280 150 335 is different than 280 155 355, decide which one is yours... :p

Anyway, find attached an excel file with all bosch codes, so you can choose accordingly.

My setup is an 1.2T mpi (Punto75), with stock Punto75 ECU and an extra injector-controller. Currently, the stock ECU is unable to keep correct mixture from -0.4 to 0 bar, extra injector starts to deliver fuel after 0 bar. So, i am preparing for a remap, removing extra controller/injector, plus main injectors replacement with UT 280 150 702 ones (150 gr/min) , as i am expecting about 120hp. If you are going higher, use Punto GT ones 280 150 701 (187 gr/min), but be prepared for bad emissions at idle. Multiply by 1.15 to get cc/min from the above gr/min.

Remap is inevitable, need to alter ignition timing too if you want to keep exhaust temps under control, at +0.5 bar.
 

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Asteris said:
280 150 335 is different than 280 155 355, decide which one is yours... :p

Anyway, find attached an excel file with all bosch codes, so you can choose accordingly.

My setup is an 1.2T mpi (Punto75), with stock Punto75 ECU and an extra injector-controller. Currently, the stock ECU is unable to keep correct mixture from -0.4 to 0 bar, extra injector starts to deliver fuel after 0 bar. So, i am preparing for a remap, removing extra controller/injector, plus main injectors replacement with UT 280 150 702 ones (150 gr/min) , as i am expecting about 120hp. If you are going higher, use Punto GT ones 280 150 701 (187 gr/min), but be prepared for bad emissions at idle. Multiply by 1.15 to get cc/min from the above gr/min.

Remap is inevitable, need to alter ignition timing too if you want to keep exhaust temps under control, at +0.5 bar.

Ah excellent info I'll be using the work printer to print off all 34 pages of info you have there.

I have a 1.1 SPi set up so using the original 400cc injector plus the additional 300cc injector run by MF2, but adding the Cosworth 3bar fuel pump gives me some 700cc, looks like your running 4 150cc injectors so 600cc, plus an additional one of same so about 750cc capability, so not much differance. i woudl have thought tho with your MPi set up it would have been easier to run a standalone ECU running the correct size 4 injectors instead of having to run a 5th injector?
 
I will run on a remapped stock 1.1 spi ECU, with UT (280 150 702) injectors, no extra injectors. It should be enough for my 120HP. These are about 170cc (150 gr/min * 1.15). UT were able to reach 130+ HP on these injectors. Also Alfa33 1.7 16V (127HP) used these injectors, so i guess i will be fine...

Problem with bigger injectors is that you spoil idle emissions, cause they cannot inject at small rates and you won't manage to pass emissions test. So choose the minimum size required.

For 1.1T, even the Alfa33 1.7 8V 108HP (280 150 703), should be enough...

Punto GT uses the 280 150 701...
 
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