How to strenghten a 2.5 open deck block

[BalliSTIc]

Dave don't make me laugh with Glyn being clued up on 2.5's :lol: Glyns probably read Daz Davies thread on 22b.com and seen the work Zen Performance did ie pinned the 2.5 block

I have and I have Kev. And you'd be stupid to consider pinning without doing your homework - the sites you mention I would consider BASIC reading. 'bout the right level for you Kev, I'd say *chortle*

And as it happens, it's AGRA in Dundee that are doing MY build. AND they pin too. Engine's in... just waiting on the run-in oil (their advice).

I DID ask Paul Finch about the 2.5CDB he has on his site... this is a co-development with Litchfield and I rather suspect will appear in a Type-25 at some point. There are also rumours of Bob Rawle being involved therewith.

rb268 - email sent earlier in the week, mate. Just not had a mo to post here till now. If you didn't get it, PM me. Does sound like you're getting some HG issues. Have a look in your header and expansion tanks... is she pushing coolant? I also know from reading up on NASIOC that 2.5s on track also have a habit of finding the limit of the stock radiator... might be worth a looky... or perhaps a cooked 'stat. Just a thought.

[rb268]

I have and I have Kev. And you'd be stupid to consider pinning without doing your homework - the sites you mention I would consider BASIC reading. 'bout the right level for you Kev, I'd say *chortle*

And as it happens, it's AGRA in Dundee that are doing MY build. AND they pin too. Engine's in... just waiting on the run-in oil (their advice).

I DID ask Paul Finch about the 2.5CDB he has on his site... this is a co-development with Litchfield and I rather suspect will appear in a Type-25 at some point. There are also rumours of Bob Rawle being involved therewith.

rb268 - email sent earlier in the week, mate. Just not had a mo to post here till now. If you didn't get it, PM me. Does sound like you're getting some HG issues. Have a look in your header and expansion tanks... is she pushing coolant? I also know from reading up on NASIOC that 2.5s on track also have a habit of finding the limit of the stock radiator... might be worth a looky... or perhaps a cooked 'stat. Just a thought.

no extra water in header tank & no bubble

run evans waterless cooling

[BalliSTIc]

Basic reading when i am putting links up to sites to help people out. He never mentioned in his first post that he was running 500 and odd bhp .If it was me i would of gone down the 2.2 out of the 22b closed deck route loads stronger and go for way higher bhp with the right internals and external mods than a semi closed deck block and pinned

For ultimate bhp, yes, I think that's been extensively covered earlier in the thread.

H*ll if you REALLY want big power, jack the whole subaru thing in and go GTR!!! *chuckle*

Some people just want a little bit more from their 2.5... or perhaps just want to take the road less travelled.

Having driven 2.0 and 2.5, there's NO comparison for low down torque IMO. It's marmite I'm afraid... and I'm a fan.

But we're rather missing the OP's point... back on topic please

[BalliSTIc]

no extra water in header tank & no bubble

run evans waterless cooling

So header tank is dry? That WOULD be consistent with HG leak.

I didn't have bubbles either and we did several sniff tests... all clear. But both my HGs were very definitely seen to have gone when it was stripped down.

Reading up your Evans stuff... interesting. Is your temp gauge going up into red or just up a bit? If I've picked it up right, their info suggests your coolant would be running at a higher temperature albeit still absorbing the engine heat, ie: your temp gauge will read higher but because of the extra heat capacity of the solution, it's still within safe limits... or am I awa' up the wrang dreel?

[wilky]

At that kind of boost you are going to see alot of heat being generated by track work.

The Squirrel will back me up when I say that when I started running my original track car (The Millenium Falcon) putting 1.85 bar through a WRC CDB by about lap 4 the water temp was slightly higher than normal but the oil temp was unacceptable so a zerosport 70 degree thermostat was put in along with an oil cooler and that sorted it all out.

I don't need to tell you that if you are having a polish affect on the head gasket at 1.8 bar and nothing has given way and you havent actually distorted you bores, stop doing it lol!!!

Im pretty sure that Zen ran their green TA car for a while on a pegged block, and I know that people in NZ have experimented with welding the whole lot up and drilling holes as required in it, however there is no conclusion to that story and you really dont want to be welding at the top of the bore, A. your going to affect the properties of the metal its constructed from and B. If you ever do see any det and you have messed it up its all going to end in tears because thats the area of the bore that will suffer the most during detonation.

I have read about and seen Honda 4 pots use an insert into that area of a block to "close the deck", the insert was obviously made for that type of block. wether you can get something similar for a Subaru EJ I don't know, but again you need to ask how are we going to fix it in? weld or whatever? Back to square one.

In my humble opinion which mean hee haw, I would steel sleeve a 2.0 CDB to whatever you want, have the bore a bawhair proud like we spoke about, and keep the boost below 2 bar. At the end of the day we are not trying to win Le Mans. Try and get the performance you need with as little boost as possible.

Callum

[BalliSTIc]

I don't need to tell you that if you are having a polish affect on the head gasket at 1.8 bar....

In my ignorance... please explain chief.

[wilky]

In an earlier post RB said that he was polishing his head gasket.

The heads or a head has obviously been taken off because of issues or whatever, and it has been noticed that the gasket in certain areas looks shiney, or polished and I would bet it was in the area where the gasket seals between the cylinders and the heads.

Thats would suggest movement, metal on metal contact which is causing the polishing effect.

[rb268]

In an earlier post RB said that he was polishing his head gasket.

The heads or a head has obviously been taken off because of issues or whatever, and it has been noticed that the gasket in certain areas looks shiney, or polished and I would bet it was in the area where the gasket seals between the cylinders and the heads.

Thats would suggest movement, metal on metal contact which is causing the polishing effect.

i am guessing that is happing

have not strips of the head yet

will pm you the full speck of the car

[BalliSTIc]

In an earlier post RB said that he was polishing his head gasket.

The heads or a head has obviously been taken off because of issues or whatever, and it has been noticed that the gasket in certain areas looks shiney, or polished and I would bet it was in the area where the gasket seals between the cylinders and the heads.

Thats would suggest movement, metal on metal contact which is causing the polishing effect.

Cheers Callum. That's one less thing I don't know... rather a lot left though *chuckle*

Will keep y'all posted on how the pinning does... but am not likely to push it as hard as the OP! We'll see.

[ciaranrb5]

Just read your post so called subaru expert have you ever driven 2.0 litre twin scroll or is that above you hatch owner sun shines out of a 2.5 arse .Cherio signing of here for good

Harsh Kev

[StrikE]

Just read your post so called subaru expert have you ever driven 2.0 litre twin scroll or is that above you hatch owner sun shines out of a 2.5 arse .Cherio signing of here for good

A 2.0 litre twin scroll scooby has nothing like the torque of a 2.5 hatch or otherwise. I have seen it for myself.

On a serious note, why the hostility?

[stum450n]

Just read your post so called subaru expert have you ever driven 2.0 litre twin scroll or is that above you hatch owner sun shines out of a 2.5 arse .Cherio signing of here for good

Play nicely children please.

[colin_ross]

In my humble opinion if you're pushing an ej257 to the point where its needs to be pinned then you've got the wrong engine. Get a cdb, stroke it if you wish and build the rest of the engine to spec.

While I'm making sweeping statements I'd also try and avoid linered blocks (sorry Callum ) as the cast in liners are far superior from a reliability point of view.

[badbaz]

Hello Colin! How are you doing?

[colin_ross]

Not bad mate.

Have taken some time off from the car due to a mixture of personal reason. Been popping back in here and there to see whats happening and to make sure I don't get too out of date.

Car is still tucked up in the garage and actually has a few new parts waiting to be fitted to it. Looking to have it out next year and ready to kick some arse (again).

What have I missed anyway?

[badbaz]

Hope all is well.

I look forward to seeing the mods in action!

Not missing too much, it's been a quietish year, everyone is feeling the squeeze I think. Except Glyn apparently

Sorry to hijack the thread

[colin_ross]

Hope all is well.

Highs and lows mate - the sort of stuff that puts the car into a distant second place.

I look forward to seeing the mods in action!

You know me mate - you wont see a thing

[wilky]

In my humble opinion if you're pushing an ej257 to the point where its needs to be pinned then you've got the wrong engine. Get a cdb, stroke it if you wish and build the rest of the engine to spec.

While I'm making sweeping statements I'd also try and avoid linered blocks (sorry Callum ) as the cast in liners are far superior from a reliability point of view.

Your absolutely right Colin, we all know that. However the original question was how to strengthen what he had already. I think a linered block is fine so long as you stay below 2 bar, but as you correctly said there is absolutely no promise that even that is going to prevent dropping something. Once again this is just my opinion.

[colin_ross]

.......Once again this is just my opinion.

And it's one you've earned over the years. Different strokes for different folks mate.

Speaking of strokes.........have you worked your way round ALL of the gay bars over there yet? Heard you and the LHFOJ had hosed the place rotten.

[wilky]

And it's one you've earned over the years. Different strokes for different folks mate.

Speaking of strokes.........have you worked your way round ALL of the gay bars over there yet? Heard you and the LHFOJ had hosed the place rotten.

Heres you Fav song.

You won't be so bold when muscle nut kicks your back door in during the night!! lol!!!

[colin_ross]

You won't be so bold when muscle nut kicks your back door in during the night!! lol!!!

Well he's had plenty of practice kicking yours in over the years. Must be like a broken cat-flap by now.

[wilky]

Well he's had plenty of practice kicking yours in over the years. Must be like a broken cat-flap by now.

Lol you penis, at least it isn't like yours which resembles a granny's kiss ;-)

[wilky]

Not bad mate.

Have taken some time off from the car due to a mixture of personal reason. Been popping in the back door here and there to see whats happening and to make sure I don't get too out of date.

Car is still tucked up in the garage and actually has a few new parts waiting to be fitted to it. Looking to have it out next year and ready to pump some arse (again).

What have I missed anyway?

I rest my case.