cadivette

iTrader: (1)

I am about to put the finishing touches on my 383 build. It has Callies crank and rods, H series clevite bearing. Rod bearing clearances are all about .0025 and main clearances are about the same. I ran a GM ported high volume pump on the stock motor before it went boom.


I have a double row Comp timing chain and I've read about some issues with the high volume Melling and front cover clearances.

Today I picked up a Melling standard volume, but I wanted a little input before I put it together.

brian_rs/ss

the hv can be cut to fit a double roller. there are threads somewhere on here on how to do it. and i'de say it's worth it, i love my 10296.

ChiTownHustler

iTrader: (3)

Standard volume pump is fine, however if this is an Aluminum based 383 you main bearing clearances are VERY VERY loose

01ssreda4

iTrader: (96)

As a bit of info for Melling pumps:

M295 = stock replacement pump - stock pressure/volume
10295 = better made pump - stock volume/high pressure
10296 = same pump body as 10295 - more volume/standard or high pressure springs included

I think....

brian_rs/ss

i was under the impression that the 96 has a more beefy body, impeller, and slightly larger ports. hence why a double roller wont fit with out modification. and why the 96 also costs more.


could be wrong though.

SOMbitch

iTrader: (8)

Melling changed the casting of the housing on the newer 10296/95 pumps so I am 99.9% sure they will clear a double roller now. I would run a HV pump with those clearances also.

Darkman

iTrader: (2)

Ditto on the Melling 10296 high volume pump - it comes with 2 springs that let you choose standard pressure or high pressure (stock +10%).

cadivette

iTrader: (1)

That's what I needed was some convincing. I ordered the Melling 10296.

Thanks for the input.

raven154

iTrader: (14)

I've got my 296 sitting on my desk. It is definitely more beefy than the stock LS6 pump. It's a very nice piece. I was planning on cutting the pump and the timing cover but that would be very nice if melling already made the mods clear the double roller.

cadivette

iTrader: (1)

Ordered a 10296 today, will be here on Wednesday. That is the last piece to pu my engine together. I'm pretty excited, been waiting for 2 1/2 years!

brian_rs/ss

good ****