Rocken tech injectors

[turboram]

How about I prove it on my excursion dd with a ve? It has enough fuel for past 400rwhp and has stock head bolts I am in the process of acquiring a bigger turbo,timing will be conservative.
you did hit part of it with timing BUT its the base timing being too high causing excessive cylinder pressure and heat because the timing drops under full throttle
..I will be working on a timing curve correction as soon as my pump stand is up and running

[turboram]

To answer your question no I don't know anyone with 400 rwhp and no head studs, but then I don't personalty know anyone that hot rods ve's. My wifes ride made 430 rwhp with water methanol on stock head bolts and a 450,000 mile motor.
But that was a one time shot only used it 2 pulls on the dyno and a few minutes on the street........


I would however recommend studs I was not saying don't use them . Read back what I said it can be done but will end with a blow gasket eventually

[BC847]

because the timing drops under full throttle

How so? Case pressure drop?

[RCCUMMINS89]

Same reason our engines don't rattle as much in the high rpms. Even though it is actually further advanced..... it really isn't in the grand scheme of things.


But what do you consider a "hot rod ve". Are there internal things that you are doing to these pumps (w/the exceptions of the couple new tings) that let's say me, BC, or a lot of the other guys have done? Also though, I've never blown a head gasket at idle or low rpm. I've always lifted my head at wot at 45 psi and above 2000rpms.




Now saying that, I'm not disagreeing that it cant be done. But it's def. hard to get over 400 while keeping the cylinder pressures down with a ve, especially a single turbo.

[turboram]

my case pressure gauge tells me that at wot and about 3000rpm that I have half the advance that I would at part throttle. not the way you want it to go .

[RCCUMMINS89]

Well.... you have really big injectors though too.

Dropping case pressure is only happening to those with monster injectors..... correct? Or not?

[turboram]

doesn't drop as much with smaller injectors .....but 5x14 or 6x13 injectors are not monster injectors ,they are big

[RCCUMMINS89]

Depends on the injector..... Most 6x13s I've had tested flow about 40% less than yours. (correction: 32-34%)

Keep in mind that those injectors flow 8lpm more than the ones Stomp used to make 633 rwhp on water/meth with.

[turboram]

so your saying my injectors are good quality?

[RCCUMMINS89]

whoever edm'd them did a very good job.

they flowed when they came in at more than any 5x16 or smaller injector "out of the box". Did have one set of 5x14s flow exactly the same though.

Point being is the ol' typical size chart doesn't mean a darn thing to what they actually flow. There is quality edm and very poor edm floating around.

[RCCUMMINS89]

All in all though..... we ( me ) am making a pointless venture off in no man's land.

The important point is now, what to do with case pressure drop. If "only" that size of injector is dropping it that far......all of our timing stuff doesn't do a darn bit of good.

[turboram]

Patience Give me time.... I'll figure it out it just takes time when you own a business

[RCCUMMINS89]

Well... I like the dual feed idea the best.

otherwise, I've got a design in mind where one runs 2 timing springs (1 external) that allows only a small amount off of dynamic and then the external allows more dynamic that runs strictly off of boost. That way with anything more than 0 psi of case pressure one can still get full advance with the external due to boost. Also it would be adjustable similar to a spring wastegate. Also at light throttle the dynamic timing is restricted and therefore not over advancing like we have now. And to boot the entire thing wouldn't be any larger than the current ksb.

But it's complicated and your set up actually increases fuel flow as well.