Not for the squeamish,lol .
29-06-2008, 08:51 PM
#1
I've found that life I needed.. It's HERE!!
Thread Starter
Not for the squeamish,lol .
Finally got my cossie engine apart ths weekend ,which failed rather spectacularly at
central meet 2007........
Pulled the motor yesterday,
then took it apart today.........
I had looked in the engine with a bore scope a week after the pod meet and knew it had at
least done a bore and the side of no.3 piston,but as I had another project in a 1000
pieces ,and no cash to repair it ,this is the 1st chance I've had to take it apart....
Just as bad as I thought I'm afraid,and its done some damage to the head as well,but
I wasn't expecting quite what i saw when the piston was out .........
Engine was dyno'd at scs by ahmed a few years ago,492 bhp ,431ft/lb's.
probably done less than a 1000 miles since then !
puddy
central meet 2007........
Pulled the motor yesterday,
then took it apart today.........
I had looked in the engine with a bore scope a week after the pod meet and knew it had at
least done a bore and the side of no.3 piston,but as I had another project in a 1000
pieces ,and no cash to repair it ,this is the 1st chance I've had to take it apart....
Just as bad as I thought I'm afraid,and its done some damage to the head as well,but
I wasn't expecting quite what i saw when the piston was out .........
Engine was dyno'd at scs by ahmed a few years ago,492 bhp ,431ft/lb's.
probably done less than a 1000 miles since then !
puddy
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29-06-2008, 09:01 PM
#8
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Thread Starter
All 4 pistons showing signs of det,I took no.2 out as well to get the machining work copied
for the new pistons ,the crownwas unmarked but the side of the piston was u/s and all
ring lands crushed,I suspect too much ignition ?
puddy
for the new pistons ,the crownwas unmarked but the side of the piston was u/s and all
ring lands crushed,I suspect too much ignition ?
puddy
29-06-2008, 09:03 PM
#10
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Thread Starter
29-06-2008, 09:07 PM
#11
Norris Motorsport
Puddy,
Sounds plenty adequate, provided that your swirl pot and lift pumps were of adequate design to prevent fuel starvation.
From my experience of engines coming from the dyno, most are safely mapped with respect to ignition advance, but usually require live mapping in car to optimise the fueling.
Obviously without actually seeing everything first hand and looking at your engine map, everything is just speculation.
Sounds plenty adequate, provided that your swirl pot and lift pumps were of adequate design to prevent fuel starvation.
From my experience of engines coming from the dyno, most are safely mapped with respect to ignition advance, but usually require live mapping in car to optimise the fueling.
Obviously without actually seeing everything first hand and looking at your engine map, everything is just speculation.
29-06-2008, 09:14 PM
#12
I've found that life I needed.. It's HERE!!
Thread Starter
Puddy,
Sounds plenty adequate, provided that your swirl pot and lift pumps were of adequate design to prevent fuel starvation.
From my experience of engines coming from the dyno, most are safely mapped with respect to ignition advance, but usually require live mapping in car to optimise the fueling.
Obviously without actually seeing everything first hand and looking at your engine map, everything is just speculation.
Sounds plenty adequate, provided that your swirl pot and lift pumps were of adequate design to prevent fuel starvation.
From my experience of engines coming from the dyno, most are safely mapped with respect to ignition advance, but usually require live mapping in car to optimise the fueling.
Obviously without actually seeing everything first hand and looking at your engine map, everything is just speculation.
Also running 2 x grp a filters,after the pumps.
puddy
29-06-2008, 09:21 PM
#14
I've found that life I needed.. It's HERE!!
Thread Starter
road !
This was the 1st run @ pod, on bfg pro drag radials,popped the motor at the 1000foot
marker and still ran a 12 !
puddy
ps,karl do you think the piston is far enough down the bore for 6.8-1 ?
Last edited by puddy; 29-06-2008 at 09:23 PM.
29-06-2008, 09:28 PM
#16
Norris Motorsport
Puddy,
As you're on a 2wd head, simply from the above photos I would estimate the engine to be in the 7.2 - 7.5 range. I am judging this simply by appearance only based on how my pistons look when we bowl std mahles for this kind of C.R's.
IMO it does not appear to be a 6.8:1 engine.
As you're on a 2wd head, simply from the above photos I would estimate the engine to be in the 7.2 - 7.5 range. I am judging this simply by appearance only based on how my pistons look when we bowl std mahles for this kind of C.R's.
IMO it does not appear to be a 6.8:1 engine.
29-06-2008, 09:33 PM
#17
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Thread Starter
Cheers dave ,temporary fix in hand mate .
If it was dyno'd ,ignition would be mapped according to det presumably ,no matter what
assumed c/r was quoted ?
puddy
Puddy,
As you're on a 2wd head, simply from the above photos I would estimate the engine to be in the 7.2 - 7.5 range. I am judging this simply by appearance only based on how my pistons look when we bowl std mahles for this kind of C.R's.
IMO it does not appear to be a 6.8:1 engine.
As you're on a 2wd head, simply from the above photos I would estimate the engine to be in the 7.2 - 7.5 range. I am judging this simply by appearance only based on how my pistons look when we bowl std mahles for this kind of C.R's.
IMO it does not appear to be a 6.8:1 engine.
assumed c/r was quoted ?
puddy
29-06-2008, 09:38 PM
#18
Norris Motorsport
Puddy,
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
29-06-2008, 09:43 PM
#19
I've found that life I needed.. It's HERE!!
Thread Starter
Puddy,
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
All joking aside,I will probably get you to livemap it for me once the long studded
block is back in, I am doing a 205 blocked short engine at the mo, until I can afford to
repair the 200 block.
puddy
29-06-2008, 09:46 PM
#21
Norris Motorsport
Yeah thats fine mate if you want to, I can take a look and tell you how suitable the map is. If you want address give me a call at work tomorrow, and you can post it down. If anything looks out of the ordinary I can revise the map and send it back to you.
29-06-2008, 09:49 PM
#22
I've found that life I needed.. It's HERE!!
Thread Starter
puddy
29-06-2008, 09:50 PM
#23
I've found that life I needed.. It's HERE!!
Thread Starter
29-06-2008, 10:00 PM
#26
Puddy,
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
29-06-2008, 10:10 PM
#28
30-06-2008, 09:12 AM
#29
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Puddy,
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
did the lift pump shut down completely at 200mph martin?,how would that compare to one pump failing when you are running two?
my feeling would be that it would be harder to spot one pump failing as aposed to the lift pump.
just curious as i was running two pumps and considered going to one.
30-06-2008, 11:43 AM
#31
I've found that life I needed.. It's HERE!!
Just looking at the lift pump in the picture, the lift pump is mounted on it's side, they have to mounted upright, Martoon told me about this a few years ago when he saw that mine was mounted on it's side too. I read the instructions that came with it and it is also stated in there to mount upright.
30-06-2008, 09:24 PM
#32
I've found that life I needed.. It's HERE!!
Thread Starter
Puddy,
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
Have you checked the lift pump? I had exactly the same thing happen on the Mondeo at just on 200mph (private test road 6am) I later found that the Holley 110gph lift pump had died, mine was mounted under the car and had failed due to water ingress..
I very much doubt that it would have left Harveys with too much ignition, the ignition values are well known for your spec of engine.
when it is back together,I will check flow ,anyone remember the figures, 5 litres in
100secs ?
Just looking at the lift pump in the picture, the lift pump is mounted on it's side, they have to mounted upright, Martoon told me about this a few years ago when he saw that mine was mounted on it's side too. I read the instructions that came with it and it is also stated in there to mount upright.
although it ran faultlessly on the road.
puddy
30-06-2008, 09:37 PM
#33
Finally got my cossie engine apart ths weekend ,which failed rather spectacularly at
central meet 2007........
Pulled the motor yesterday,
then took it apart today.........
I had looked in the engine with a bore scope a week after the pod meet and knew it had at
least done a bore and the side of no.3 piston,but as I had another project in a 1000
pieces ,and no cash to repair it ,this is the 1st chance I've had to take it apart....
Just as bad as I thought I'm afraid,and its done some damage to the head as well,but
I wasn't expecting quite what i saw when the piston was out .........
Engine was dyno'd at scs by ahmed a few years ago,492 bhp ,431ft/lb's.
probably done less than a 1000 miles since then !
puddy
central meet 2007........
Pulled the motor yesterday,
then took it apart today.........
I had looked in the engine with a bore scope a week after the pod meet and knew it had at
least done a bore and the side of no.3 piston,but as I had another project in a 1000
pieces ,and no cash to repair it ,this is the 1st chance I've had to take it apart....
Just as bad as I thought I'm afraid,and its done some damage to the head as well,but
I wasn't expecting quite what i saw when the piston was out .........
Engine was dyno'd at scs by ahmed a few years ago,492 bhp ,431ft/lb's.
probably done less than a 1000 miles since then !
puddy
thats a real shame m8
who built your engine ?
30-06-2008, 09:45 PM
#34
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Thread Starter
All machining work was done by mickey lowman at lowman developments in east london,
he used to do a bit for jo at blue sprint.
I built the engine myself,been in the trade 30 years.
puddy
he used to do a bit for jo at blue sprint.
I built the engine myself,been in the trade 30 years.
puddy
30-06-2008, 10:46 PM
#37
I've found that life I needed.. It's HERE!!
Not saying that it is the cause of the meltdown, but i wouldn't want you to rebuilt it and it do it again for the sake of making a new bracket
01-07-2008, 04:10 AM
#39
Puddy,
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
Absolutely, regardless of C.R the ignition would be mapped corretly on dyno. DO you by any chance know what your top line of ignition was at say 2 bar. If you do I can tell you if it is in the correct "ball park" for a 2.0YB engine running 500bhp at around 7.2:1 C.R.
Interested in this as I have a basemap by AB that has the following;
2 bar (absolute) = 14 btdc
2.6 bar (absolute) = 7 btdc
Is this in the "ball park"?
Last edited by LINCOLN; 01-07-2008 at 05:48 AM.
01-07-2008, 06:21 AM
#40
Colossal Pervert
Yes... that's a reasonable ignition value.
As above, engines don't leave Harveys dyno with any det - that's one of the benefits of using an enginy dyno, you get to do everything properly. However, also as above, the engine should ALWAYS be checked in-car - installation is the problem 99% of the time (not putting down your work, but unless everything was checked, you'd never know). 5 litres in 100 seconds isn't enough to me - I know AB specs 4 litre/min static fuel flow (with the engine running) for his 500bhp engines, so perhaps you did have an issue.
Have you spoken to Harvey or AB about this? Surely they'd be the first port of call rather than the internet?
As above, engines don't leave Harveys dyno with any det - that's one of the benefits of using an enginy dyno, you get to do everything properly. However, also as above, the engine should ALWAYS be checked in-car - installation is the problem 99% of the time (not putting down your work, but unless everything was checked, you'd never know). 5 litres in 100 seconds isn't enough to me - I know AB specs 4 litre/min static fuel flow (with the engine running) for his 500bhp engines, so perhaps you did have an issue.
Have you spoken to Harvey or AB about this? Surely they'd be the first port of call rather than the internet?