2.5 Race built engine
10 February 2003, 11:37 AM
#1
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suppose andy is your best bet to getting some results from a big cc engine.............it's about time someone did it right 
just think how many you could build and sell with the right results since some folk can make a living with no real results in the community.
[Edited by T-uk - 10/2/2003 11:40:31 AM]
just think how many you could build and sell with the right results since some folk can make a living with no real results in the community.
[Edited by T-uk - 10/2/2003 11:40:31 AM]
10 February 2003, 01:40 PM
#2
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lol @ andy!
T-UK
Don't recall anyone anyone in this country making a living out of selling any 2.5s.
The only 2.5s I can think of which made results but went on to fail were private projects.
sad that mine failed due to subaru liner thickness being insufficient, but then it did well to hold out at 561 lbft for as long as it did.
andy, would like to see you get your hands on this, would be happy to swap notes from my expensive lessons.
[Edited by Adam M - 10/2/2003 2:36:50 PM]
T-UK
Don't recall anyone anyone in this country making a living out of selling any 2.5s.
The only 2.5s I can think of which made results but went on to fail were private projects.
sad that mine failed due to subaru liner thickness being insufficient, but then it did well to hold out at 561 lbft for as long as it did.
andy, would like to see you get your hands on this, would be happy to swap notes from my expensive lessons.
[Edited by Adam M - 10/2/2003 2:36:50 PM]
22 September 2003, 07:19 PM
#3
complete 2.5 Engine for sale built from ground up.
Price and details on enquiry only. All enquiries will be taken seriously, and if you're serious, you will enquire.
Email as per profile.
Paul
Price and details on enquiry only. All enquiries will be taken seriously, and if you're serious, you will enquire.
Email as per profile.
Paul
23 September 2003, 11:21 AM
#5
not for now, keeping all the anclillary stuff though
Basic spec of engine is 2.5l closed deck block, Forged pistons, billet rods, new cams, ported heads.
Complete engine with matched inlet manifold, fuel rails and injectors.
Options for buyer would include dyno run in and mapping.
Paul
Basic spec of engine is 2.5l closed deck block, Forged pistons, billet rods, new cams, ported heads.
Complete engine with matched inlet manifold, fuel rails and injectors.
Options for buyer would include dyno run in and mapping.
Paul
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02 October 2003, 10:49 AM
#23
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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
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top, Ive seen this engine.. the build is covered on 22b.. provide a link paul 
David
David
02 October 2003, 02:08 PM
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Adam/Paul
Any idea what power/torque level this type of welded block has been proven reliable at ?
I imagine Cobb must have a few cars out there with plenty miles on them now ?
I know a lot of sand racers use a welded 2.5 block and they seem reliable at 450bhp. Not sure what torque they are running, they seem to limit boost to 1.5 bar so I think that may be around 450lb-ft on a 2.5 ?
Andy
Any idea what power/torque level this type of welded block has been proven reliable at ?
I imagine Cobb must have a few cars out there with plenty miles on them now ?
I know a lot of sand racers use a welded 2.5 block and they seem reliable at 450bhp. Not sure what torque they are running, they seem to limit boost to 1.5 bar so I think that may be around 450lb-ft on a 2.5 ?
Andy
02 October 2003, 02:43 PM
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sorry andy,
can't speak for pauls block as I know nothing about it.
cobb does appear to have many proven after market closed decked 2.5s, but as you know from offline discussions, I am not in a position to talk about them from experience.
Trey had informed me that he was unaware of any failures.
can't speak for pauls block as I know nothing about it.
cobb does appear to have many proven after market closed decked 2.5s, but as you know from offline discussions, I am not in a position to talk about them from experience.
Trey had informed me that he was unaware of any failures.
02 October 2003, 02:51 PM
#27
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I didn't mean Pauls block or Cobb blocks specifically, more the generally accepted limits of an original liner type 2.5 , as opposed to custom sleeved blocks.............if there is such a thing as an accepted/recommended figure ?
Andy
ps - Just keeping it btt for you Paul until you decide to sponsor me
Andy
ps - Just keeping it btt for you Paul until you decide to sponsor me
02 October 2003, 03:53 PM
#28
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andy,
the only cause of my failure on the dyno was the standard liner splitting an about inch down its length. Interestingly I don't think the split was at the top of the bore!
Feedback from trey cobb says he is very surprised to have seen mine fail, as he has seen several engines in the 5 to 600 mark operating fine.
I have several ideas on this.
american horsepower may well be lower than uk horsepower due to the din/sae figure difference. I think this in the region of 20%, so my 567 is closer to their 700.
I havent seen another scoob engine develop the torque mine was making so its possible that it ws the peak torque and associated pressure which blew the liner.
The bores may well have been walking due what we have discussed, allowing the liners to flex and stress certain areas, therefore if the other welding had held together the standard liner may well be able to handle the pressures involved.
Finally, it is possible mine had an inherent weakness and was an anomoly, the bore may not have been particularly true, or perhaps an X-ray prior to construction would have shown up a weakness.
the only cause of my failure on the dyno was the standard liner splitting an about inch down its length. Interestingly I don't think the split was at the top of the bore!
Feedback from trey cobb says he is very surprised to have seen mine fail, as he has seen several engines in the 5 to 600 mark operating fine.
I have several ideas on this.
american horsepower may well be lower than uk horsepower due to the din/sae figure difference. I think this in the region of 20%, so my 567 is closer to their 700.
I havent seen another scoob engine develop the torque mine was making so its possible that it ws the peak torque and associated pressure which blew the liner.
The bores may well have been walking due what we have discussed, allowing the liners to flex and stress certain areas, therefore if the other welding had held together the standard liner may well be able to handle the pressures involved.
Finally, it is possible mine had an inherent weakness and was an anomoly, the bore may not have been particularly true, or perhaps an X-ray prior to construction would have shown up a weakness.
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