Pauls supercharged rocket build

[pauljones915]

But can it wake you up in the morning with a brew and a, (well you know)

[Paul (madeye)]

today

[pauljones915]

Now that my friend is making me JEALOUS.

[Deleted]

Looking nice, now pull those green injectors out for the iva, no chance it will pass with them in lol.

My set ( intermediate ) of injectors are shelved until pass day

[Paul (madeye)]

ran the kuniffer today, what a pain in the arse to get neat, with 2m wobbling about all over the place.
snapped the m4 tap too which means i couldnt finish off clamping it all down.





do these look ok for iva purposes??

[Deleted]

Spot on, 12" is the rule, I go 6" incase I miss one, or it comes off lol.

Try to clip before and after the bend also, but that's just me being picky! You can't always do it due to routing.

[kiwicanfly]

Three non-tech questions.

Why the need to blur out the chassis numbers in photos? Seen mention of it before.
What's wrong with the green injectors?
When are you dropping the engine in?

[Paul (madeye)]

Just so the chassis number cannot be replicated and abused, they are 440cc and heavy fuelling and will not do emissions (I think)
Engine should be Thursday, I need a couple more parts, believe it or not.
The massive pain is the bearings for the charger, I pulled them to get it coated and need new in case of damage, its and eat on m45, but they are closed back not open. They are and INA motor special
Taking some real patience to find

[Deleted]

The 803's are 330cc I think by memory, possibly 380cc. Enough for 350hp before you compromise top end fuelling. Good for 20psi ish, any more boost and they max out leaving nothing in reserve.

Trouble is, they will require supe refined mapping to get through Iva emmisions, and drive ability is a little off when you've pulled them right down for the test.

I had a 2wd Cosworth with a stage 2.5 kit, drove nice, but a stuffed pig in traffic. That was 20 psi, green injectors etc.The stage 3 had a bigger turbo, more boost, and was a massive difference. Ooshhhh! The memories. 440hp was the biggest I drove. Truly awful drive. LAG!

Given the old marelli ecu, Paul's omex spanks it on many levels. So, it may be okay managing it. It's not like there a set of 1000cc's to get the IVA done with lol.

[mabbs]

Whether it's any help, I moved to 690cc injectors for emissions and high-end fueling. Omex did some testing with the 440cc (big green's) and found them not to be good enough for supply for over 300 BHP.

ATB

Jon

[pauljones915]

Hey buddy, ref fuel injectors.had a quick look this morning on tinter web.looks like lime green injectors and dark green injectors are different.lime are 440cc @40psi/42lbs. dark green looks like 381cc,didnt get the whole list but we can chat about that latter.
To answer the techy question,you basicaly dont want to run the injectors at max working load,no more than 80% capacity is the norm,the problem comes when your at low revs,a big injector will give a poor spray pattern and lead to over fueling and increased emmisions,but it will good in the upper range.A small injector will be the reverse,hence the reason for banks of injectors on bikes/rs500's.its to do with AFR controls and drivability.

Paul

[Paul (madeye)]

Yep, these are the 440's. Im aiming for 265rwbhp that should be around 85% of the injectors give or take.

[Deleted]

Hi,

803's are termed 803's from the last 3 digits of the part number.



Pauls should be Bosch "0280150803" The colour referred to rarely indicates the CC of the injector. Unfortunately, the alternative manufacturers of injectors changed this. Ebay search for 803 reveals some in yellow ;( Maybe poor picture choice?

For example, i have numerous grey Bosch injectors, and green Bosch also. All are sub 200cc capacity. They are TBH bin fodder and useless for any form of performance tuning.

As for the peak power these produce, this depends on overall duty cycle, compensation factors, and BSFC ( brake specific fuel consumption). This calculation uses duty cycle and bhp, cc variables but is interesting.

Personally, I have seen the following graph on my old car using 18-20psi boost, 803's, and jenvey bodies. However, I was exceeding the duty cycle up to near 90% plus. This was where they struggled, and obviously had no reserved capability.

Lessons learnt? yes. With bigger injectors, and lower cycle, WGT ( dyno operator) reckoned that 375hp would be capable, without raising boost, as the AFR was taking a dive after 5800rpm. Some BSFC calculations showed that this was in fact correct. I never got to buy and fit them as a rod failed at the event. ( still won against a viper lol).



The engine was capable of 7000 with a flowed head. Shame really, but this was only found one day before a big event.

Paul, can you get the exact part number buddy? and we will have a looksee at what they are ?

[Deleted]

BSFC calculations here:-

witchhunter.com/injectorcalc1.php

Quick estimate provides 600cc approx requirement for this builds power output. ( similar to Jon's build)

However, it would be nice to dyno the car with a set of known cc injectors to get the BSFC, then you would get a more accurate prediction for future calculations.

[Paul (madeye)]

I'll get on it, im only running 1 bar of boost.
But this is the recommended complete setup for the charger and system
Im not after massive power, just big.