Glad I know all we need is a PM to get one. I wasn't sure if we'd have to visit you guys to get one or what. But I have thought about making a run up there come spring break. Prob have my efr in by then tho even if it isn't from you guys, no offense to you all. I'll need a trans anyways....lol...

 

It's not like we are trying to keep secrets or something. It's just that most people can have there fueling needs met through other, easier options. We try to steer people in the right direction rather than just agreeing to sell them all sorts of extra parts that they don't really need. The best plan for someone looking to make more than 500whp is to work with us on a build. It's really not all that difficult to do anymore.

 

No, sorry if I came off that way. I just thought you guys had to do custom work on our cars to install the 5th injector. My biggest problem around here is I can't get e85 only 100 octane and thats 50 miles away. Closest station is 138 miles away. And thats what I'm getting at with the visit during spring break. My goal is to meet over 500 whp on the 100 octane safely. I probably won't need that 5th injector but if it means the difference between some fuel cut and no fuel cut then I'll get one.

Edit: just forget everything I said. I just remembered Sunoco 110 is sold at the track. I'll just fill up a 55 gallon drum when I want to stock up for those spring and summer midnight runs.

 

Damn I look stupid. Thats what sleep deprivation due to certain animals making noise will do to you.

 

Matt if i have you guys do the 5th injector will that be enough or will i need a upgraded cam? I just want to run full E85 none of this mixing bullshit..

 

Same here, I would like to run 100% E85 as well. Now this larger lope on the cams, since it basically strokes the HPFP how is the wear and tear on it? How long have you guys had the pumped stroked for? No issues over time/predict?

 

I would recommend the cam over the 5th injector. The main reason is because all tuning can be done in the ECM, then. With the 5th injector controller, you need to tune both.

 

I am running a .070" larger lobe and pushing up to 8000rpm, and I have not had any issues. Customers that run .050" larger pump lobes and shift at 7200 should be fine for a long time. The roller is huge.

 

looks like I might be ordering some cams then, now you guys mentioned that with the cams its best to get the balanced shafts, I'm running 91/E85 and would like to run 100%. Do I need those? I mean I don't know if I'm going to be going to 8k or more.

 

Wait...let me get something straight. The larger HPFP lobe on the cam you guys offer will allow us to run full e85 on a bigger turbo that revs to 7k? I was under the impression that it only helped level out fuel demand on full e85 on the stock k04.

 

You don't need to remove the balance shafts for a setup you are shifting at 7k or a little higher. I do recommend valvesprings if you are planning to rev past 7k and running much past 20psi.

 

It depends on what fuel system limitations you are running into. The main issue with running E85 on the K04 is the high torque which means a high fuel demand at a lower RPM. Since the hpfp cycles faster as the engine speed increases, it has the most trouble keeping up near your peak torque rpm. Since switching to a larger turbo usually does not increase torque numbers, and it often decreases, it doesn't necessarily need any more fuel system mods. Of course with the EFR, you can achieve more torque than the K04, but the best thing is that you don't have to. You can make power all the way to 7500rpm, so there is no need to spike the boost higher at the start of the pull in search of a wide power band. Either way, the larger fuel pump lobe allows you to run E85 on a larger turbo. Here is a dyno chart from our testing on a S259 turbo:

 

Great! I knew that the dyno chart was on a bigger turbo so I figured I was safe to buy the cams with the larger lobe, but the old description on the old website threw me off. Is it possible to get the larger lobe on stock profile cams or do you offer just the intake cam, stock profile+bigger lobe?

 

roger that, springs it is

 

This is interesting.


Matt, do you guys ONLY sell the .050" larger pump lobe?


or do you guys also sell the .070" larger lobe?


so the dyno that you showed is for the .070"?

will there be any fuel starvation concerns if only running .050"?


thanks!

 

The dyno chart showed the same size lobe as we sell. I continued to test higher lift, but eventually ran into a problem where there is too much fuel pressure in some cases so it throws a regulator performance code. That was the reason for keeping the cams we sell limited to .050" larger than stock. The factory lift is only .186, so adding .050" is a lot.(27% increase) If you added that percentage of lift at your valves, it would be the equivalent of taking a .400" lift cam and bumping it up to .507" lift.

FWIW, we got up close to 500whp on Scythe Snake's car before we needed any additional fuel from the 5th injector. He is running the .050" larger lobe. I guess we could call it the 236 lobe for 236 thou added to the pump stroke.

 

thanks for the info Matt!

 

when will this be avaliable for purchasing?

 

1.99999 years

 

Available now!

- EFR Bolt-in Turbo Upgrade #

 

^ only for one person

 

for a good ol 4800 bucks. I can have my lsx block and heads for my fbody.

 

Wow, looks good and all but $4800, yikes!

 

The price falls until it sells.

 

It's like backwards ebay!