Rank: Member
Groups: Registered
Joined: 24/07/2013(UTC)
Posts: 19
|
I have recently had a top end engine rebuilt for my HG Belmont, its an original factory 253 and i kept it because its the original block for the car. I wanted it to go a bit better than standard and sort some advice, the engine ended up with a completely rebuilt set of heads, a stage 4 cam, a edelbrock torker manifold, 465 vac secondary holley, pace maker extractors and a 2.5 sports exhaust. I didn't touch the bottom end as i was told the it was rebuilt only a few years before.
NOW the Issues as i see them:
it spews oil out of the filler stork on the front of the block (not sure if this is just because the stork is located directly over the top of the timing chain)�.It has also and at silly high revs it has blown the oil filler cap off before�I know what your thinking �blow by but i had it compression tested and came up fine on all cylinders bar 1 which came out at 140 but still ok.
The idiot that completed the work on the engine hasn't connected the PCV back to the manifold�not sure how much this affects things.
It doesn't seem to have any torque, It does however rev like you would not believe�
The guy that compression tested it recently told me that its running rich as the plugs were fouling up.
It has an auto choke on the carby which takes a long time to come off and re engages while you drive the car for some time.
My thoughts are that the cam is too radical for this engine, however If someone could tune it right it may just be ok�
I have recently moved to the Gold Coast and I'm looking for someone with some really good advice and who can tune this old boy up for me, I would appreciate any help on getting it right this time.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 21/07/2014(UTC)
Posts: 75
|
You will need to connect up the PCV and this will help reduce or even eliminate the oil pressurisation.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 16/04/2014(UTC) Posts: 768  Location: Victoria Thanks: 1 times
Was thanked: 49 time(s) in 47 post(s)
|
It certainly sounds like you need some crankcase scavenging, so connecting the PCV would be a good start.
It would be worth getting a leakdown test done as well. Compression testing doesn't tell the whole story.
Does it use any oil? Are we sure the fouled plugs are due to a rich mixture, and not oil being burned? If they are all uniform in appearance after a reasonably hard run and shut off (no excessive idling) then mixture is likely, but if you have some odd men out it could be a ring gap or bore glazing problem, as well as a vacuum leak due to bad valley cover sealing. Find someone who really knows how to read a plug and you'll know more.
Given you've defined the person who did the work as an idiot I'd be looking at the camshaft timing as well. Hopefully you have the cam card.
Good luck with it.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 24/07/2013(UTC)
Posts: 19
|
It doesn't appear to use any oil and doesn't blow any smoke at present, it blows more oil out the top of the filler stork at present. Ill connect the PCV back to the manifold and see how this goes.
Do any of you guys know of someone reputable any on the gold coast that can tune this thing up right?
Its frustrating with its total lack of torque and performance given the $ put into it�. I had a 253 that was an old cop motor in an old car of mine some 20 years ago and it would have left this thing for dead. it couldn't even break traction the other week in the wet on 185 cheese cutter rubber using torque �
|
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered
Joined: 1/03/2005(UTC)
Posts: 6,058
Thanks: 1 times
Was thanked: 203 time(s) in 184 post(s)
|
Fit a PCV valve & a decent cam.
If you go too large in cam, ports & exhaust you have a good recipe for low torque.
Dr Terry |
If at first you don't succeed, just call it Version 1.0 |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 24/07/2013(UTC)
Posts: 19
|
Hi Dr Terry
What cam would you suggest for this old boy? I didn't want this stage 4 in it in the first place and queried the idiot that sold it to me, I figured it would be too big but he said no this is the cam i want as it has torque and revs�.. how wrong was he! its fine once it hits about 3500 rpm and thats when it starts to take off. I was looking for torquey motor given that the car is a 3 on the tree V8 and as you all know with this configuration you want it to pull hard in 2nd from down low as you hardly use first (only use 1st when you come to a complete stop) its a wagon and running a 3.08;1 diff ratio (I think). Here is another crappy example of how it performs i had it on a dirt road recently and rolling along in first gear at about 20 kph i pushed my foot flat to the floor and it was like it had traction control it simply accelerated slowly and then got faster and faster but with no real grunt or breaking of traction, if i have of done this in my old HJ kingswood wagon of 20 years ago there would have been stones flying out the rear and people saying who's this idiot.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 31/08/2006(UTC)
Posts: 108
|
Hi lot of 253 v8s manuals had 3:36 to 1 diffs ..
3:08 to 1 diff and a big cam not good for down low .
Tony.
|
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 14,717
Thanks: 1 times
Was thanked: 512 time(s) in 488 post(s)
|
3.08:1 was the standard manual 253 ratio for HT to HJ except for HQ-J cab chassis (3.55), you rarely see them with 3.36 except for later HZ (HX and early HZ got 3.55 behind the 253 as the pollution 4.2L engine was so bad, later changed to 3.36) . I'm with Dr Terry, go back to a nearer to standard cam. I'd also fit a blue 253 Quadrajet and turf the Holley but it may go OK with just the cam. |
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
|
|
|
|
|
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.
