Engine/Transmission (1994 - 1998) free delivery valve mod's ??

[BAnsley]

I was told all you need to do is turn your delivery down in a lathe. Any thoughts on pro's or con's.

 

[Joseph Donnelly]

I dyno tested the “larger” -191 delivery valves two different times, and also “cut” delivery valves. The 191s with your 215 HP pump gave a difference of 0. 0 HP each time. Even with “cut” valves, there was no gain, in fact the cut valves cost a few HP. Leave the -181 delivery valves in! They are what I used to make 800 HP, single turbo, diesel only back in 2003.

 

[BAnsley]

Thanks Joseph, Would they beneficial in a smaller pump?



Thanks, Brian

 

[nascar mark]

I beg to differ. Just because one persons findings were 0hp, there is many on the boards that will tell you differently.

I know lots of customers that have gained decent power out of 160/175/180 and yes 215 pumps, by upgrading the stock DV's.

 

[GDMRTN]

I been cutting my own for a long time already. The best cheapest mod anyone can make. It's called a full cut delivery valve.

 

[TMRichardson]

i have used full cut del. valve in a 94 12v #5 plate 131 del. valve made 236 rwhp. . installed full cuts went to 303 rwhp... 32 psi to 49 psi with full cuts [stock hx35 turbo]..... best power gain out there... ... .