4.5L Stroker questions

[kryptoniteXJ]

Hey guys this is what I have spec. out for my stroker build.
let me know that you think. all of this is going in a '91 4.0l block and a 7120 head.

4.0L To 4.5L Jeep Stroker Kit
http://www.rpmmachine.com/amc-stroker-kit-4l.shtml
CAST PISTON CRANK KIT $845.00
THIS KIT INCLUDES:
• Speed-O-Motive Prepped 99mm STROKER CRANK
• I-BEAM STAGE 1 RODS WITH ARP ROD BOLTS
• CLEVITE ROD & MAIN BEARINGS
Upgrades To This Kit Include:
• BALANCE ROTATING ASSEMBLY $125.00
• Hypereutectic Pistons w/Teflon coated skirt $100.00
• Moly ring set $21.00
• New head bolts $41.77
Total $1133.00

Cam: xtreme 4x4 (x4250H-13) complete cam kit.
Kit Includes: Cam, Lifters, Timing Set, springs, retainers, Locks, valve seals,
http://www.compcams.com/Cam_Specs/CamDe ... id=12&sb=2

I want to run roller rockers. But I don’t want to pay YT’s price.
I already have a Hi volume/Hi pressure oil pump.
Can I reuse my stock push rods??
As for valves I have no idea what I’m going to run yet.

let me know if yall have any questions or sugestions.

[John]

Don't use a high pressure oil pump on a rebuild. You can get by with a high volume with a little work, but the high pressure pump can cause you problems. If your bearings are worn out and you want to use one to increase oil pressure instead of rebuilding the motor, ok. Otherwise it can be a source of failure.
John

[kryptoniteXJ]

My worn bearings was the original reason I bought the HI press/volume pump. But wouldn't the hi volume create a hi pressure???

[Flash]

With a High Volume pump, basically you have a larger pump rotor in it, allowing more volume per revolution of the pump.
If the volume is not needed the pressure relief valve will waste the excess volume, allowing the pressure to be the same as stock.

If you have a hi volume, plus pressure, now there is more pressure every were in the motor at all times.........This, in its self, is not such a bad idea. HOWEVER, now you have a lot more pressure on the oil pump drive, and that means that there is more pressure on the dist gear, causing rapped Ware of the gear and eventuality failure..........


Flash

[John]

Yes, distributor gear wear, and sometimes camshaft wear can occur, Feel lucky?
John