928 racer challenge..kibort vs the world.. March 22-23 Thunderhill
#16
Rennlist
Basic Site Sponsor
Basic Site Sponsor
Pick one:
A. I'm premenstrual and was overcome with emotion.
B. I was sleep walking.
C. I'm on a new medication.
D. I just got out of the dyno room, where the exhaust fumes got to me.
E.. All of the above.
A. I'm premenstrual and was overcome with emotion.
B. I was sleep walking.
C. I'm on a new medication.
D. I just got out of the dyno room, where the exhaust fumes got to me.
E.. All of the above.
__________________
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
#18
Rennlist
Basic Site Sponsor
Basic Site Sponsor
There is a slight problem.
I went online to try and order some Amsoil to test.
Found out that I have to work on Tuesdays at the airport, wearing a white robe while handing out some sort of a brochure.
And I have to work Friday evenings selling Mary Kay Cosmetics.
I went online to try and order some Amsoil to test.
Found out that I have to work on Tuesdays at the airport, wearing a white robe while handing out some sort of a brochure.
And I have to work Friday evenings selling Mary Kay Cosmetics.
#20
Nordschleife Master
I have owned my 928 S2 Auto track car for 9 years - probably well over 100 hours combined - got the car/engine with 108k on the ODO.
Engine has never been out - never been cracked open except for the front end to do all seals, TB , H2O pump etc ...
Still runs like a raped ape ... I run Valvoline Racing Oil and straight water with Purple Ice -
here she is warming up this wednesday - https://www.facebook.com/photo.php?v...type=2&theater
and rest assured - she is just as fast as my friends 5.0 L Euro Hybrid - 5 spd. (another conversation all together)
YMMV
Engine has never been out - never been cracked open except for the front end to do all seals, TB , H2O pump etc ...
Still runs like a raped ape ... I run Valvoline Racing Oil and straight water with Purple Ice -
here she is warming up this wednesday - https://www.facebook.com/photo.php?v...type=2&theater
and rest assured - she is just as fast as my friends 5.0 L Euro Hybrid - 5 spd. (another conversation all together)
YMMV
#21
Rennlist Member
Moderator.....
Please block Kibort's computer from receiving this. His ego can't take much more, without his head exploding!
For all the **** I give Kibort....
There has to be something good about Amsoil. I'm going to do as Kibort suggests and find out. I suspect that they are very "active" with anti-foaming additives....which would help a ton, in the 928 engine, and I believe from seeing results of oil testing that they "fudge" a bit on viscosity. Their 15-50 oil looks more like a 15-60 oil, to me.
And for the lap times that Mark does turn, with the crap that he seems to use for tires....he has to be pretty damn smooth.
Regardless, you don't have to have a Doctorate in Physics to know that eventually the cornering forces are going to eventually get high enough to expose the pick-up and the pick-up is going to suck air.....there simply isn't enough of anything in the 928 oil pan to keep this from happening. I, however, do not believe that the best oil on the planet is going to keep the rod bearings from touching the crankshaft, when this happens.
Which sadly means only one thing....it's just a matter of time!
Please block Kibort's computer from receiving this. His ego can't take much more, without his head exploding!
For all the **** I give Kibort....
There has to be something good about Amsoil. I'm going to do as Kibort suggests and find out. I suspect that they are very "active" with anti-foaming additives....which would help a ton, in the 928 engine, and I believe from seeing results of oil testing that they "fudge" a bit on viscosity. Their 15-50 oil looks more like a 15-60 oil, to me.
And for the lap times that Mark does turn, with the crap that he seems to use for tires....he has to be pretty damn smooth.
Regardless, you don't have to have a Doctorate in Physics to know that eventually the cornering forces are going to eventually get high enough to expose the pick-up and the pick-up is going to suck air.....there simply isn't enough of anything in the 928 oil pan to keep this from happening. I, however, do not believe that the best oil on the planet is going to keep the rod bearings from touching the crankshaft, when this happens.
Which sadly means only one thing....it's just a matter of time!
I do think there could be something to the oil and its qualities. im no oil engineer, but i do have some actual, factual experience to go on. The fact that its working, through the lap times I run, tells me that something is working. Lots of theories out there, and i dont think im doing anything that special driving wise. again, anyone can turn a good lap time .... eventually.
I dont think its the heads, as i had them surfaced and we looked at them pretty carefully for any differences off a stock head, and i didnt notice anything, but again, im not an expert there either. (2 valve heads maybe yes, 4 valve ... no)
I still contend, a lot of blown up engines are due to the engines being bad to begin with (pre-existing damage or weakness), or being neglected, or have been subjected to forces that could damage the bearings. (bad downshifts, rev limiter bangs, poor warm up procedures, or poor tune giving knocking)
getting back to driving...... Again, im really not talking about my level of driving, im only using lap times to prove that the g forces produced are equal or greater than anyone has seen in a 928. sure, i do use tires that are used, but its not that they are that bad. usually, they are from a record setting session or race from a fellow driver that just wants new rubber. the next 2-3 sessions for me, might only be .5 seconds off my fastest pace. the slicks i used came off the world challenge GT cars that change their tires after every race weekend and are only used for qual and race. these are real slicks and they gave me a .5 to 1 second edge over the sticky DOTs i was using. I will tell you , my car is pretty easy to drive, but in noway is tuned to the best it can be. With a 15 year old street/sport suspension, no mods to chassis and a near street alignment at 2 degree camber, there are a lot of things i need to drive around.
do you have me suspicious about willow springs? yes, a little, but certainly, the track, g forces, and durations of those gs are really not much different than any other track. and with brian rnning thunderhill backward, if hard right hand turns were an issue, his car wouldnt have survived that session or day at t-hill. Hmmm, maybe that is what killed casper!
#22
Rennlist Member
actually, just dial the phone number and order it up. probably the easiest ordering process available.
I have owned my 928 S2 Auto track car for 9 years - probably well over 100 hours combined - got the car/engine with 108k on the ODO.
Engine has never been out - never been cracked open except for the front end to do all seals, TB , H2O pump etc ...
Still runs like a raped ape ... I run Valvoline Racing Oil and straight water with Purple Ice -
and rest assured - she is just as fast as my friends 5.0 L Euro Hybrid - 5 spd. (another conversation all together)
YMMV
Engine has never been out - never been cracked open except for the front end to do all seals, TB , H2O pump etc ...
Still runs like a raped ape ... I run Valvoline Racing Oil and straight water with Purple Ice -
and rest assured - she is just as fast as my friends 5.0 L Euro Hybrid - 5 spd. (another conversation all together)
YMMV
But , my point here is that we used the valvoline racing oil with scots car and had some oil pressure issues at temp. (he used my oil temp set up a few times). he then went to amsoil and never had those issues agian. dont know if it was the same oil , but it was valvoline and it did say "racing" on the bottle.
#23
Nordschleife Master
funny ^^^^^^^
actually, just dial the phone number and order it up. probably the easiest ordering process available.
Yes, it does. I know in the end, aside from all the joshing, there are some smart folks here that can listen to logic and not the hype!
curious....... i also had an S2 that i ran for about 5 years on the track in DE. then it morphed in to the euro hybrid and then euro hybrid 5 liter. it was amazing, but it had the 84 and later crank with larger oil holes.
But , my point here is that we used the valvoline racing oil with scots car and had some oil pressure issues at temp. (he used my oil temp set up a few times). he then went to amsoil and never had those issues agian. dont know if it was the same oil , but it was valvoline and it did say "racing" on the bottle.
actually, just dial the phone number and order it up. probably the easiest ordering process available.
Yes, it does. I know in the end, aside from all the joshing, there are some smart folks here that can listen to logic and not the hype!
curious....... i also had an S2 that i ran for about 5 years on the track in DE. then it morphed in to the euro hybrid and then euro hybrid 5 liter. it was amazing, but it had the 84 and later crank with larger oil holes.
But , my point here is that we used the valvoline racing oil with scots car and had some oil pressure issues at temp. (he used my oil temp set up a few times). he then went to amsoil and never had those issues agian. dont know if it was the same oil , but it was valvoline and it did say "racing" on the bottle.
#24
Drifting
You're a great sport Mr. Kilbort.
These new pans by Moroso address the same LS motor oiling issues while road racing and drag racing.
w/ 4-trap door assembly and anti-slosh baffle to keep oil contained around the pick-up.
one with deeper front for clearance for use of main-cap-mounted windage tray.
Greg, a similar design (the shelf which is around the pickup tube but an insert into the OB pan) would keep our oil from
sloshing away from the pickup under hard long corners.
A whole new laser cut steel pan would be ideal (you could add more depth) if the interest was there..
These new pans by Moroso address the same LS motor oiling issues while road racing and drag racing.
w/ 4-trap door assembly and anti-slosh baffle to keep oil contained around the pick-up.
one with deeper front for clearance for use of main-cap-mounted windage tray.
Greg, a similar design (the shelf which is around the pickup tube but an insert into the OB pan) would keep our oil from
sloshing away from the pickup under hard long corners.
A whole new laser cut steel pan would be ideal (you could add more depth) if the interest was there..
#25
Rennlist Member
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A 928 engine will last a long time on track on street tires. Brian's estate lemons racer is the best example I know of.
Sticky tires high RPM = 928 sudden death.
#26
Rennlist Member
Brian, again, you forget with the one 'good" engine, you left out something that should have been death for it, from the beginning of your racing it......... the early crank!! TOO SMALL OF OILING HOLES!
had it not been for that, im sure it would still be running today. but,its a good thing. Im sure that the new engine, built by someone that knows how to put things together, will run for a very long time.
there is something else i thought about that no one else has mentioned. if you race a street car, with stock suspension, what happens????????? anyone anyone???
?
?
?
?
you get a lot of body roll.... how much???? LOTS!!!!! you can almost get it to get on two wheels!!!!
?
?
?
?
anyone know what this is equal too as far as the oil level looks like?
?????????
you got it. it looks like lateral gs, but even more than the turn is providing. so, you get 25 degree body roll ( just for an example) , and you pull 1g and suddenly the oil looks like its seeing 1.5gs or greater!!!
so, these cars that are softly sprung, can have a much greater effect in the oil moving around than one that is stiffly sprung.
so, that would make me a little worried Brian, as your car with the really soft springs in the rear, and no sway bar , can induce a lot of body roll,, especially on slicks that could exacerbate the problem, if there is a problem.
However, in Rob E's car, that would not be the issue, as andersons car was light and sprung tight. that junk yard engine was the issue (and possibly the oil he was running in it)
had it not been for that, im sure it would still be running today. but,its a good thing. Im sure that the new engine, built by someone that knows how to put things together, will run for a very long time.
there is something else i thought about that no one else has mentioned. if you race a street car, with stock suspension, what happens????????? anyone anyone???
?
?
?
?
you get a lot of body roll.... how much???? LOTS!!!!! you can almost get it to get on two wheels!!!!
?
?
?
?
anyone know what this is equal too as far as the oil level looks like?
?????????
you got it. it looks like lateral gs, but even more than the turn is providing. so, you get 25 degree body roll ( just for an example) , and you pull 1g and suddenly the oil looks like its seeing 1.5gs or greater!!!
so, these cars that are softly sprung, can have a much greater effect in the oil moving around than one that is stiffly sprung.
so, that would make me a little worried Brian, as your car with the really soft springs in the rear, and no sway bar , can induce a lot of body roll,, especially on slicks that could exacerbate the problem, if there is a problem.
However, in Rob E's car, that would not be the issue, as andersons car was light and sprung tight. that junk yard engine was the issue (and possibly the oil he was running in it)
#27
Rennlist Member
What are you running for tires? We run slicks the 1.5 continuous G load is where the problem comes from with peaks of 1.8
A 928 engine will last a long time on track on street tires. Brian's estate lemons racer is the best example I know of.
Sticky tires high RPM = 928 sudden death.
A 928 engine will last a long time on track on street tires. Brian's estate lemons racer is the best example I know of.
Sticky tires high RPM = 928 sudden death.
watch the videos.. Im not holding back anywhere!
watch and listen!!!! love the sound of the 928 engine being rung out !!
#28
Rennlist Member
also makes me think of driving style for a second. i do a lot of trail braking into turns, so that puts all the oil up front for a majority of the turn up too the apex. maybe thats buying me some time. however, still, this doesnt address that sucess at thunderhill for a 1.5+ g turn for a 7 second duration and no issues.
#30
Nordschleife Master
What are you running for tires? We run slicks the 1.5 continuous G load is where the problem comes from with peaks of 1.8
A 928 engine will last a long time on track on street tires. Brian's estate lemons racer is the best example I know of.
Sticky tires high RPM = 928 sudden death.
A 928 engine will last a long time on track on street tires. Brian's estate lemons racer is the best example I know of.
Sticky tires high RPM = 928 sudden death.