Best Numbers So Far

[///MDex]

These seem rather anti-climatic relative to Rukman’s [Congrats again for another NickG MC! ], but I'm still happy with them as my personal best. 378whp and 306wtq

At 378whp and 6500rpm, I’m at 12.88afr. This is the data from the export feature in the Dynojet software.



You can see I’m a shade lean up top. Add more fuel, right?

I’m maxing out my 38s that came with the RMS Stage II kit. Nick has 42s in stock, and a proven, stable, and reliable tune for 42s, but the 42s only get me another couple hundred RPM before they are maxed out.

While that could be safer for the short run, I’d have no room to upgrade anything later [i.e. cams] and still have enough injector to cover it.

So the solution we’re kicking around is to go with larger than 42s and possibly a higher capacity fuel pump. Specifics are being researched. This will allow Nick to tune for a slightly safer AFR in the short term, and grant enough overhead capacity for upgrades down the road.

I welcome your feedback.

[dinans3m3]

Im running 42lbers (440cc) with a set of cams and have not run out of injector. I do have the walbro pump in as well if that helps. From what i see in your graph i saw in my setup prior to the walbro upgrade. That was the resolution to mine and possibly your problems.

[jmargo]

I'm running RC eng 550cc injectors and have room to grow on those.
Still running the stock fuel pump though...for now.
I can't believe you are maxing out 42#'s. Most people get in the 420 range before they are maxing them. Maybe its all fuel pump ?

[dinans3m3]

why are your rpms cut at 6700. You should make more power considering the extra 200-300rpms your being cheated on.

[dinans3m3]

Doesnt Nick use 38lbers flowing 42? or are you using 36lbers flowing ~38?

[///MDex]

why are your rpms cut at 6700. You should make more power considering the extra 200-300rpms your being cheated on.

IDK. I was running to 7k each pull.

[dinans3m3]

ok just a function of the dyno then.

[///MDex]

Doesnt Nick use 38lbers flowing 42? or are you using 36lbers flowing ~38?

IDK. The Lucas 38s came with my RMS kit. IDK what different injectors' actual flow might be.

[///MDex]

ok just a function of the dyno then.

Must be. They actually lost one or two pulls during this session. This is the same dyno I've been on since my install.

[dinans3m3]

IDK. The Lucas 38s came with my RMS kit. IDK what different injectors' actual flow might be.

The D11638A inj. that come with the RMS kit are different then the ones Nick uses. Some say they are 36lbers some say they are 38lbers. If they are 36lbers you are maxing them badboys out and need to upgrade them to 38lbers. Paul is running the 38/42lbers from Nick with no issues or lean dips. If you can get more fuel after ~5600rpm you will yield better results.

[///MDex]

The D11638A inj. that come with the RMS kit are different then the ones Nick uses. Some say they are 36lbers some say they are 38lbers. If they are 36lbers you are maxing them badboys out and need to upgrade them to 38lbers. Paul is running the 38/42lbers from Nick with no issues or lean dips. If you can get more fuel after ~5600rpm you will yield better results.

Right. Looks like I have D11638As. He adjusted his 42# tune for these 38s. Is that a 'B' or an '8'?

[dinans3m3]

those are D11638As not Bs. You need an injector upgrade.

[///MDex]

I corrected it on you Right - but the 42s won't help much

[dinans3m3]

yes they will. They will allow more fuel flow. If that doesnt help drop in a Walbro pump. You dont need to upgrade to the Porsche HFM. I am running the euro HFM and have not maxed it but then again my tune has a calibration for it.

[///MDex]

True enough - they will flow more, but now enough to make it worth the investment.

I'm fairly certain mine are 38s. A quick Google exercise pointed me to this site and picture Link

To paraphrase the discussion Nick and I had today, I'm maxing out my 38s enough that [i.e. 20%] that a bump to 42s won't gain me much.

[NickG]

The D11638A inj. that come with the RMS kit are different then the ones Nick uses. Some say they are 36lbers some say they are 38lbers. If they are 36lbers you are maxing them badboys out and need to upgrade them to 38lbers. Paul is running the 38/42lbers from Nick with no issues or lean dips. If you can get more fuel after ~5600rpm you will yield better results.

You are incorrect Angelo. The injectors in question come in both 38 AND 42lb/hr sizes. My program uses the 42lb/hr size. MDex's car was a unique case as I modified the program to work with his 38lb/hr units.

The 42lb/hr injectors are only about 11-12% larger than the 38lb/hr injectors, so there's not too much to be gained by switching to them.

[///M3 CRAZY]

Right. Looks like I have D11638As. He adjusted his 42# tune for these 38s. Is that a 'B' or an '8'?

those are the 38# injectors the same ones i have in my car!

[///M3 CRAZY]

so you mean to say they are 38lbers and 42lbers at 3.0bar? I could have sworn when i flow tested my D11638A they were flowing close to 39lbs/hr max thats why i went the extra mile to get the 42lbers at 3.0bar. In that case i labeled them 36lbers at 3.5bar since some places sell them as 36lbers @3.5bar & 38lbers @3.5bar. Now if he uses the 42lbers at 3.0bar he will get ~44-45lbs/hr at our rated 3.5bar system. that should be more than adequate for his setup. Am i wrong on this one?

from my research on these, they are 38# @ 3 bar and flow ~42# @ 3.5 bar. they indeed are good for close to 400rwhp. i am at least the third guy i know with the EXACT same setup and they work great!

[dinans3m3]

hey i dont know what happened to my post. Drew when i tested one of the Delphi's before i sold them i was told they were capable of flowing 39-40lbs/hr from a diesel shop. i dont have the exact stats on hand but when i find them, if i do ill post it.

[///M3 CRAZY]

//m dex what are the specifics of your setup? i am ging to guess you are running 11psi, aftercooled s52. but do you have cams? if you have the cams you should be running the 42# injectors. that is the common setup on the s52. then you can get a tune from AA like many others and push well over 400rwhp.

[///M3 CRAZY]

hey i dont know what happened to my post. Drew when i tested one of the Delphi's before i sold them i was told they were capable of flowing 39-40lbs/hr from a diesel shop. i dont have the exact stats on hand but when i find them, if i do ill post it.

no need, i believe you. for some reason the s50 can get away with those but the s52 makes out much better with the 42's.

[Croak]

Those are what I'm using as well. It probably is that 0.2 displacement difference, all else being equal the S50 is a smaller pump than the S52, so it doesn't need as much fuel.

[///MDex]

Thanks all for the feedback. I appreciate it.

//m dex what are the specifics of your setup? i am ging to guess you are running 11psi, aftercooled s52. but do you have cams? if you have the cams you should be running the 42# injectors. that is the common setup on the s52. then you can get a tune from AA like many others and push well over 400rwhp.

Yes, yes, no. See the text in the graph NickG will be my tuner until he tells me otherwise. I don’t think anything is wrong with the tune – it’s the hardware [injectors and fuel pump].

[BimmerBoyZ3]

Its garbage. Scrap the whole car and just give it to me. Go buy a minivan or something.


Nice #s man. Cant wait till the Dragon to get a ride.

[///M3 CRAZY]

Thanks all for the feedback. I appreciate it.

Yes, yes, no. See the text in the graph NickG will be my tuner until he tells me otherwise. I don’t think anything is wrong with the tune – it’s the hardware [injectors and fuel pump].

sorry must have missed the description. if you do not have cams then those are great numbers and i wouldn't worry bout it except to have it richened up a bit on the top end.