Ronco95

Ok, can a Mack Rack Plug be installed with the pump mounted?

Thanks,

Ronnie

rebel5422

is it good for the mack plug to be put in a 215hp pump someone told me not a good idea and what kind of afc mods are we talking about soft spring kit and slid all the way forward on a 0 plate just curious i have a 96 5spd dually 0 plate star wheel and afc housing slid all the way forward and fixinto put in the soft spring this weekend what kind of power do yall think i have the nearest dyno is about two hours away and i would like to put in a new clutch first this one has about had it thanks

johnsjas

I believe that it is not a good idea to put a mack plug in a 215 pump. I think that happens is that you over-rotate the spill ports that fill the plungers and actually get less fuel.

If I am mistaken I am sure someone will correct me.

HOHN

I for one particularly appreciate this because I got into this when the 24V aftermarket was already established, and I honestly learned VERY little about the finer points of modding a 12V. My 12V knowledge would fit in a thimble washed in hot water.

As a lot of us consider a project truck or a cheaper 12V as a beater, it's nice to have info like this.

justin

Don Wagner

The LPC is shortened with increased rack travel which in turn retards the timing. This is only common with emission plungers, the dual helix performs well on the street but not in a competition format.

2500

many thanks for sharing... my 97 w/auto could use the same treatment. 400hp would be the limit I'd want to try..

what's so great about this thread is dyno tells with no guess work.
this tell me pretty darn close what to expect if I should do the same.

finally bumped my timing to 16.5 today. interested to see if your 18.5 still give reliable service without blowing a head gasket.

sure like to get a triple disc TC in mine. that's got to be done before engine mods.

rebel5422

so does that mean id be able to run more timing without messing something up or would it not be a good thing if i drag race this truck as well as daily driving whats a good timing i should run even without the rack plug? really would like yalls estimate on the power to the ground my truck has thanks

Don Wagner

I use 15° for street use and 18° for mixed on the 215hp pump, more timing will effect the cyclinder pressure enough to cause headgasket failure.

dzlfarmboy

Your prob close to 300hp

Brett

2500

some of us consider a 9712valve the ultimate CTD!

just test drove a newer CR... CTD... yup... interior was MUCH nicer.
but came away thinking I'd be going backwards going to a CR cummins

ok... flame away...

renopker

the ones with 97 think so but us with the98 12v think we have the ultimate.

rebel5422

what did the 96 ctd roll out of the factory with at the wheels imo i should be setting a little higher than 300 i was of the opinion it was closer to 350-375 especially with a 5spd just curious if i went to dyno right now and it was 300 or less i would be severialy disapointed

rebel5422

what power would i be looking at if i just stuck some 370s in there, and what would it be with the 370s and with laser cut dvs thanks

kelownadiesel

It might get a little toasty with 370's and full cuts.LOL

rebel5422

370s is by no means my first choice in injectors i really want the ddp 140s but not really interested in buying a turbo right now so my thought is 370s cheap power and the smoke dont bother me it might bother the people behind me but this is a small town so they are used to seeing it from me anyway lol