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4.6 block??
Posted: Sun Apr 03, 2011 5:10 pm
by minter
hi guys wanting some advice,,,
currently running a blown 3.5 rover,, i'm very keen on making more hp/torque etc,, the easiest way for me to do that is buy buying a 4.6 block building bottom end then transferring top half of 3.5 over.
i'm always told the 4.6 is always prone to faults leaky liners etc,, should i be looking at something like this with block having top hat liners, x bolted mains etc
http://cgi.ebay.co.uk/RANGE-ROVER-P38-V ... 43a0fd63e5
will this eliminate the problems prone with these blocks?
i wanna go chevy route eventually but this the best fastest option for now.
your thoughts please,, many thanks.
Posted: Sun Apr 03, 2011 5:51 pm
by ChrisJC
The top-hat liners certainly cure the symptom of a crack behind the liner. The block remains cracked of course, but that doesn't seem to matter.
Chris.
Posted: Sun Apr 03, 2011 7:12 pm
by kiwicar
£1250 seems a little steep for just the block to me, you can have a reconditioned chevy 350 4 bolt long engine from real steel for £150 more but I supose its not a rover.
best regards
Mike
Posted: Sun Apr 03, 2011 8:47 pm
by ChrisJC
Turner Engineering are about £1300 I think, and they O-ring the bottom of the new liner.
The cheaper vendors (£800 ish) just stick a wadge of silicone sealant there instead.
Not sure which method this vendor uses.
Chris.
Posted: Mon Apr 04, 2011 10:24 am
by kokkolanpoika
Just wondering is it bossible to bore Turner Engineering block to 96mm bore, if they use O-ring at the bottom?
When my local machine shop in Finland made couple of top hat blocks, i think they only add some glue between the block/liner, not silicone selaer?
And i dont have any proplem + ever hear any bad for other blocks..
V8 developments sell top hat blocks at 995inc vat?
Posted: Mon Apr 04, 2011 11:48 am
by POAH
kiwicar wrote:£1250 seems a little steep for just the block to me, you can have a reconditioned chevy 350 4 bolt long engine from real steel for £150 more but I supose its not a rover.
best regards
Mike
yeah but look who is selling it lol
Posted: Mon Apr 04, 2011 4:00 pm
by katanaman
FFS it was only a couple of weeks ago he told a forum member the top hat blocks were rubbish and the only thing to do was buy one of his Coscast blocks! I guess he has ran out of them for the moment!!!!!
Posted: Mon Apr 04, 2011 4:20 pm
by ChrisJC
Not sure it's the same 'entrepreneur'!!
Chris.
Posted: Mon Apr 04, 2011 4:29 pm
by katanaman
You might be right Chris I am not completely sure now you mention it.
Posted: Mon Apr 04, 2011 4:35 pm
by katanaman
In fact you are right, I know who it is now.
Posted: Mon Apr 04, 2011 5:41 pm
by ged
Have you checked out the company name in contact details?
Posted: Mon Apr 04, 2011 8:47 pm
by minter
are these companies just for the work on the block or do they do hole bottom end?
Posted: Tue Apr 05, 2011 11:02 am
by kiwicar
POAH wrote:kiwicar wrote:£1250 seems a little steep for just the block to me, you can have a reconditioned chevy 350 4 bolt long engine from real steel for £150 more but I supose its not a rover.
best regards
Mike
yeah but look who is selling it lol
In my experience Real Steel are pretty well respected certainly I have had very good service from them and find their prices good. Are you thinking of RPI by any chance??
Best regards
Mike
Posted: Tue Apr 05, 2011 3:44 pm
by SuperV8
I to had the same idea over a year ago now!
I had a 3.5 supercharged and wanted more... Found a 4.6 on e-bay thought it was worth a gamble. Paid £300 for block bottom end and heads. Had been in a vehicle fire apparently???
Anyway had the block pressure tested and three liners leaked
but I brought it knowing this was a posible. Think it was £800 for top hat liners. I won't get into the new gearbox to handle the extra torque, new diff with a more suitable ratio, new fuel system (pump,injectors) etc,etc...
When boring the new liners they asked what size? So then I started dreaming about going bigger... but had to stop myself getting carried away as funds wouldn't stretch to new pistons and balancing as well, so i'm making do with supercharging my 4.6.
Tom.
Posted: Tue Apr 05, 2011 7:24 pm
by minter
SuperV8 wrote:I to had the same idea over a year ago now!
I had a 3.5 supercharged and wanted more... Found a 4.6 on e-bay thought it was worth a gamble. Paid £300 for block bottom end and heads. Had been in a vehicle fire apparently???
Anyway had the block pressure tested and three liners leaked
but I brought it knowing this was a posible. Think it was £800 for top hat liners. I won't get into the new gearbox to handle the extra torque, new diff with a more suitable ratio, new fuel system (pump,injectors) etc,etc...
When boring the new liners they asked what size? So then I started dreaming about going bigger... but had to stop myself getting carried away as funds wouldn't stretch to new pistons and balancing as well, so i'm making do with supercharging my 4.6.
Tom.
hi tom yes i'm very keen on going bigger,, i'm pretty suprised wiv performance now from a 3.5 wiv blower,, have u had a dyno with the 4.6 hp torque?? who dun the work on your block,, deciding which way to go about it?!?