Is it true the 2.5 engine is weak?
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Is it true the 2.5 engine is weak?
Guys
Just after some info - a customer of ours made a comment about the hawkeye 2.5 engines being weak. Didint really pick up on it but remembered just now
What does/did he mean? Are there probs with this engine? I have 12 months warranty left so would like to know what to watch out for if there are any weakspots
Matt
Just after some info - a customer of ours made a comment about the hawkeye 2.5 engines being weak. Didint really pick up on it but remembered just now
What does/did he mean? Are there probs with this engine? I have 12 months warranty left so would like to know what to watch out for if there are any weakspots
Matt
#5
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semi forged pistons (got some fancy name but can;t remember what it is, but its not full forged) and semi closed deck blocks so not mega strong
not sure on limit on istons but high 400's will normal do it for the block
not sure on limit on istons but high 400's will normal do it for the block
#7
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should add i was talking about sti. iun standard form they will run and run and run, as per post above, by week its normaly ment how hard/far it can be tuned before it self destructs
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i said normaly there are some that self that survive. but i think those that do are more luck than judgment tbh. i've seen lots that when you push them to near 2bar they split the bores, sure one got posted up on here where 3 had gone at once
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#15
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biggest strength issue is there semi close deck, closed deck blocks are much stronger
#16
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Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
Last edited by Shaun; 19 November 2009 at 11:49 PM.
#17
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The more and more people I speak to, the more and more the feedback is tied in with DET. I have pushed 2bar and beyond.... no block integrity issues so far. I also run higher compression and still alright so far. Remember, my engine is used harder than most as well.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
As for the OP (Off Your Marks); They are only "weak" if you mess with it (and don't do your homework). Seeing as yours has warranty, I guess its probably standard, keep it that way and it will probably last forever (am I starting to sound like Pete? )
Last edited by ALi-B; 20 November 2009 at 12:09 AM.
#20
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The more and more people I speak to, the more and more the feedback is tied in with DET. I have pushed 2bar and beyond.... no block integrity issues so far. I also run higher compression and still alright so far. Remember, my engine is used harder than most as well.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
i would put money on if you took 100 scoob engines and put 500bhp through them using exactly the same spec you'd get 60% survival rate.
if you did the same with say ferrari engines you'd be lucky to get one failure.
but if you;ve ever sen ferarri engines made (not saying you havn't) you;d prob be amazed what they do to them, including xray testing for defects, which if any are found they send them back and melt them downa dn start again
so going back to the origional point, to stay on the safe side of that risk you need to set a level at which you know that 99% be fine and i think 500 is too high for that.
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thanks a lot guys
i guess i'm pretty safe with mine then - its a gb270 wagon so only putting out 270PS.
I was just curious really and wanted to check things over whilst in warranty if they had any major flaws that lead to certain failure
Ive no intention to modify it but if i did then 300 - 340 would be more than enough i guess
i guess i'm pretty safe with mine then - its a gb270 wagon so only putting out 270PS.
I was just curious really and wanted to check things over whilst in warranty if they had any major flaws that lead to certain failure
Ive no intention to modify it but if i did then 300 - 340 would be more than enough i guess
#24
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The more and more people I speak to, the more and more the feedback is tied in with DET. I have pushed 2bar and beyond.... no block integrity issues so far. I also run higher compression and still alright so far. Remember, my engine is used harder than most as well.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
Don't get me wrong, the OE casing is flawed to a degree, but I think a lot of stuff that happens is down to other issues and then it becomes gospel according to ScoobyNet. Some people said to me that 500bhp (If I could ever achieve it on a standard casing lol), would mash my liners up in minutes...... I have had a fair few road minutes, track events, competition events so far and over 2yrs have passed.
Maybe it will let go at some point, but imo they are not weak at 500-550bhp if built and mapped right.
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Shaun:
Are you stating for the record that yours is a completely standard block that hasn't been modified in any way?
If so thats an awesome acheivement (and I really ought to revisit your stripdown thread on 22b)
The blocks are considerably stronger than first thought and scoobynet mythology would have you believe
Are you stating for the record that yours is a completely standard block that hasn't been modified in any way?
If so thats an awesome acheivement (and I really ought to revisit your stripdown thread on 22b)
The blocks are considerably stronger than first thought and scoobynet mythology would have you believe
Last edited by Peanuts; 20 November 2009 at 08:30 AM.
#27
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Ali-B,
Circa 15k miles.
Tidgy,
I have not seen any evidence to suggest that cylinders have just split, that has had nothing to do with DET or another "issue". If you are building an engine at this level using an OE case, you would be stupid not to measure and check everything you can. But that is the difference between a good engine build and a bad one.
At this level NOTHING is 99% reliable, regardless of what some people will make us believe.
Peanuts,
The block case is totally OE apart from a change in the block deck height. No strengthening or anything else. It's a standard 257 case.
Circa 15k miles.
Tidgy,
I have not seen any evidence to suggest that cylinders have just split, that has had nothing to do with DET or another "issue". If you are building an engine at this level using an OE case, you would be stupid not to measure and check everything you can. But that is the difference between a good engine build and a bad one.
At this level NOTHING is 99% reliable, regardless of what some people will make us believe.
Peanuts,
The block case is totally OE apart from a change in the block deck height. No strengthening or anything else. It's a standard 257 case.
#28
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Totally disagree with this statement. I'm running 415bhp/380lb/ft through a totally standard engine internals 03 UK STI. The engine has covered nearly 80,000 miles - over 45,000 of them at close to or above 400bhp. Even now, the engine burns almost no oil, the compression is great and the valve clearances (checked last week) are still spot on. Moreover, I've not had one single mechanical problem with any of the OEM components on this car. OK, the car is serviced every 4000-5000 miles instead of 9,000 but it still speaks volumes for the mechanical integrity of the car. As others have said here, mapping is key and I'm convinced that Zen's mapping has been part of the reason why the engine is still running so well.
Last edited by lunar tick; 20 November 2009 at 12:10 PM.