Thericker

l Need some more info on what Fuel injector Size & brand (Five-O uses modified Bosch INJ) IE 550cc according to Five-O Motorsports is Stock for E55 AMG & Jody told me he used them on his V12 biturbo swap? Wouldnt I need 650cc or larger? ANY help greatly apreciated (car in question SL600 v12 biturbo) Came here to ask since all REAL gear heads live here...

These NEW mods are quite substantial & should put me very close to 800+ odd rwhp on dedicated Q16 or & E85 files. Full list & pix to follow. Jeremy is re-dyno tuning after ALL new mods, his handheld tuner is capable of storing (10) different tunes.

PS my Tech is fully adept @ removing notorious s_hit ABC hydraulic suspension & replacing w/coilovers, is it worth it? IE ride quality not too harsh it'll remove a good amount of weight & future ABC repairs thought?

Help is greatly appreciated

GT-ER

OEM E55 injectors are 415ish cc. 650's are more than enough for 800whp on Q16 but may be pushing it on E85. 750cc injectors would be more appropriate for E85.

BI-Performance

We run 1000cc injectors in my e85 e55 along with dual 340lph pumps. It took a decent amount of tuning on the dyno and the street, but the car is very close to stock in how smooth it is. It is the fiveomotorsport red injectors too, and the only quirk that gives away it has massive injectors, is at idle it will hunt 100rpms every 10-12 seconds. They are somewhat loud too, you can hear them ticking away, but I love it. My numbers are no where near what you are going for, put down 594/708 on a local dyno jet.

GT-ER

Keep in mind he will run 12 injectors, not 8.

320 dreamer

i thought oem was 480cc injectors

urbamworm

Like mentioned above, he isn't talking about an E55 so the injector size will be completely different (don't need as big), since he will have an extra 4 injectors fueling is 800whp goal.

I personally would get a set of the Bosch EV14 725cc injectors or Injector Dynamics 725cc injectors which are essentially the same thing. Just make sure you know the injector length because you may need the aluminum extensions or you may not (they come in like 3 different lengths). Then also the injector harness pigtails or little conversion clips (like 1" long) from one electrical connector plug in type to another, whichever of the two will work for you (E55 is tight fitting the 1" plastic converters between injector and rail so some use the pigtails).

e55amgrocket

I've got injector dynamics 1000's for my build but I went ahead and got a set of 725's also incase the 1000's were too big. I didn't like the five-o red injectors when I had them and they are really loud too. With you having a v12 and only looking for 800hp I would get the 550cc or if you might step it up in the future or run E85 then I would go with the 725 injector dynamics. On another note what kind of IAT's do you see? Q16 might not be the best for you. I've had a lot of talks with my builder and another builder that builds/tunes big inch supercharged engines and they said stay away from Q16 if your IAT's are over 120-130. I talked to the VP rep and regional manager and was told the same. It evaporates very quickly and has a ton of lead in it.

whipplem104

750 on E85 is to small unless you are running a lot of fuel pressure. I know the E55 runs higher fuel pressure but I do not remember what the v12 is running. I do know that I have 750cc injectors at 60psi and they will not flow enough for E85 on 6cylinders and a little North of 500ckhp. I would suggest going with the ID1000. You know you will have enough room and they idle fine.

BI-Performance

Fuel pressure will also depend on fuel line size. We decided on using stock lines but big pumps and injectors along with the looped rail. Fuel pressure was perfect for the e55 application.

GT-ER

I'm sure 750's will be enough for 800whp on E85. Again, he runs 12 injectors and assuming his car runs the industry standard of 43.5psi then 12 750cc injectors are large enough for 1100whp on race gas and 800whp on E85 at 80% duty cycle. If the V12 runs at 80psi ( which apparently most AMGs do ) then his output goes up to 1600whp on race gas and about 1200whp on E85.

It cannot be compared to E55's running only 8 injectors. I personally do not like running overly large injectors either since they will affect idle quality.

War Tank

Instead of asking us, you should consult with your tuner. I'm pretty sure he will tell you what injector and size you will need.

whipplem104

The problem I run into with most of the calculators out there is that they assume a fairly low rpm limit. Yeah 750cc injectors will flow up to 4500 rpm maybe 5k at 43.7psi but not 7,000 rpm. You run out of injector quick with another 1000rpm or 2. Now there is some margin at 80-90 psi but All engines are different and the bsfc of E85 is a little rough at best. I have seen from .90 to a little over 1 stated. I would error on a little to big unless I was willing to step up if they are to small. And ID1000's idle fine if setup properly in the tune. The new injectors are just amazing compared to the older stuff. The min/dc on these are very low due to the response time and the balance. Hell I have some old low/ohm Rochesters that idle smooth at 650rpm on pump gas. Add some pulse/width for the E85 and they are well above margin for min/dc.
Just my $0.02.

e55amgrocket

I couldn't agree more. Thats part of the reason i bought ID 1000's because they can and will drive like stock if tuned right. I've seen ID 2000's on a friends turbo honda and i was amazed how the car idles and drives. If your thinking of going E85 i would get no less than the 725's and most likely the 1000's. A good tuner can make them run better than stock.

Thericker

Excellent info/help thank you all very much (I did ask Marcin-Speedriven NO response, I also asked s few other tuners & they wern't sure & told me to do my own research) Lastly the V12 biturbos 600/65's redline @ 5700 rpm's ONLY SL65 Black Series has been bumped up slightly @ 6k rpm's vs your Supercharged V8's

Again thank you ALL very much for the time/info!!

GT-ER

I'm a bit old school when it comes to injectors so if modern 1000cc injectors can atomize fine at idle then by all means get them. Idle is the biggest issue you have with larger injectors.

Thericker

Last Question I'm goin for the 750cc INJ though Five-0 doesn't list ANYTHING for the m275 V12tt motors? Where else can I buy them (I'd rather buy a brand that was top notch & not modified Bosch INJ like 5-O sells) any links/sites where I can source these 750cc's made specifically for my V12? Again thnku very much!

320 dreamer

try bruce at ttm. he knows his way around injectors

e55amgrocket

Trust me. Go with injector dynamics and you will be happy. You can find a distributor on their website or look on ebay and email them about getting some. The 725's will be plenty for what your goals are. They aren't the cheapest but well worth it. You will need just the standard injectors with no adapters also so you might be able to get them a little cheaper. I paid $920 shipped for the 1000's and $700 for the 725's from a guy that bought them and Didnt use them.

Thericker

Thnx again bro

Thericker

Hmm looks like the plans have changed, finally found a local fabricator who has done lots of turbo swaps/work 1-off Manifolds & GTX3076R's have been purchased & rated @ 630 HP per side we'll soon see what's what.. Speedriven or OE tuning will tune her..

Max.H

Typically you want to double your fuel requirements when running methanol, alchy, or e85. Ive built cars with e85 before, sure its cheaper but they like to guzzle it down like a 40 oz. You will be going to the pump more frequently. Especially if you're the lead foot I know you are Sean! :-P

e55amgrocket

What size A/R? Make sure you do your homework and double check it. I can give you the guys number that I work with on turbo's a lot if you want to get another opinion on it. He can also do a lot of custom work on the turbo to fit your needs and most of all will tell you what you need for your goals. The v12's don't turn much RPM's so that's going to make a difference

hpV12

Cant wait to run it

Thericker

.63 A/R T3 housing + the new GTX Garretts spool 600-700 rpm's faster/sooner vs older GT series should haul fawknmail

PACougar

The GTX's are way sick, I'm glad Garrett finally started making some badass compressor wheels. I'm thinking about running one on my truck.