Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Hi all, I've got a XE alloy head 250 x-flo and have just instaled a 350 holley on it ( wish someone warned me bout clearin the intake manifold bolts with the adaptor plate, lol). It has a flat spot just as I put the boot into it. It's ok just cruising and once past the initial flat spot gets up and goes. What jet size is good for a 250, the 350 came off a 253 h****n V8 so I thought it might b ok. Could it mean I need to run a re-build kit through it cause it could be the pump inside? Also while I'm posting, anyone live in tassie have a cheap 250 short motor for sale?
THANKS HEAPS
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
hi I once owned a xe van . I had better luck mucking around with the jets in the webber. sorry I'm not a fan of holleys. and when it come rego time they just see a standard carby with the so called pollution gear no worries they dont need to know whats in
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Yeah true but the holley flows more, and with the addition of the adaptor plate, which ended up being abot 1 1/2 inches thick, to increase plenum volume, the power comes on a bit higher and lasts longer. Also I'm now doing about 250RPM less down the highw
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Change the accel pump as thats what it sounds like.
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Thanks for the advice Brenden, I've priced a complete re-build kit at my local parts bloke for $45 (or a $125 at Repco for the same kit!!!). Will this include what I need to repair the accel pump, thats what I thought it was although I didn't know what th
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
I've also priced a set of mains and big ends, sump gasket and front and rear crank seals for $150. Should fix my low oil pressure at idol, or is there a common problem with oil pumps in 250 X-flows?
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
all engines have low oil pressure at idle it is not going to hurt it at all, if your worried about it put some moories addetive or some like that, i'll tell u why.
Catipiller assembled an engine and all they did was put moories on the bearings and pumped
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
all engines have low oil pressure at idle it is not going to hurt it at all, if your worried about it put some moories addetive or some like that, i'll tell u why.
Catipiller assembled an engine and all they did was put moories on the bearings and pumped
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Well, a couple of things. If the flat sport is just after you "put the boot in" then the accelerator pump is fine. Don't worry about jets either. You probably have very good vaccuum and the power valve is not opening early enough!
Most Holley c
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
