signofinfinity

Hi all,

I am up grading to single, and also upgrading my fuel system. The plan is to go for 1680cc sec and 850 pri. 50-65 psi fuel pressure, and boost in the 17psi range on a to4r a/r 1.00

I plastic coated my engine and manifolds. Should these deffusers be re installed?:


I heard that they do like to crack and be pulled into the engine.I had in mind of eliminating the primary and secondary ones... am i making sense?

Thanks.

Whats your opinion.... what are your setups?

willjs7

iTrader: (1)

i took mine out.... they cracked taking them out and i had to pull the intake manifold off, and found it resting on the rotor, if the rotor was turned about 30 degreese it would have been in the block and i would have had to disasemble the whole thing..

anyways, i didnt use them, and the car runs normal.

black beauty

i pulled out mine for the secondary injecotrs but left them in for the primary injectors

z-beater

Holy smokes. I was just wondering this. I was installing my seconday fuel rail and when I took them out I cracked one. I decided then that I would either remove them all together or just get new replacements due to the fact that they seemed so brittle.
My question is if people installed two lower o-rings.

signofinfinity

I did see one cacked in a rotor housing on a full brigde engine. I gather you took all four out right? Pri and sec? I wouldnt want to suck those in but I wanted to know feed back from who did it or if can be done.

So they will come off... i was planning to have them ordered from my mazda dealer!

did anyone make a spacer for the lower o ring in the clamp? machine a grooved spacer perhaps? I think the gap to replace the diffusers must be filled in with something no?

Thanks for the inputs!!

George

cewrx7r1

iTrader: (2)

Years ago when going to 850s bored out to 1200 secondaries, I pulled mine inorder to put new seals on them. One had lost one of the legs so at that time I did not trust them anymore. I cut all the legs off and re-installed them with the new seals.

When you go 1600, they are totally removed.

PhatManBUD

yeah get rid of them *****, i had the same problem as willis7

i had to take off my manifold, use a shop vac and everything.

pp13bnos

iTrader: (1)

Yeap, break the legs off of them, and reinstall them. CJ

signofinfinity

Thanks! I will break their legs then!! but, as crew rx7r1 said do they come off on the 1000cc primary too? do top feed inj always do without?

Thanks for all you support guys... i will get them broken and out all together!!!

George

cewrx7r1

iTrader: (2)

If the injectors are a modded stock 850, the mechanics are the same and they mount the same as stock.

Aftermarket 1600s are mechanically different and mount differently.

signofinfinity

Thanks for the insights!!!!

Regards to all

George