Rennlist 928 sponsorship opportunity - Let's buy Mark Kibort a new motor!! $100 Each
10-03-2006, 03:55 PM
#241
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Originally Posted by Hacker-Pschorr
Are you questioning the reliability of a Nakisil motor or just making a general statement about the project?
This engine has Carrillo Rods, Moldex Crank, & Mahle Pistons. Chroming the block & using new pistons is not "skimping" in any way.
This engine has Carrillo Rods, Moldex Crank, & Mahle Pistons. Chroming the block & using new pistons is not "skimping" in any way.
10-03-2006, 04:10 PM
#242
Rennlist Member
This probably sounds like the way to go then.
tell me about "chroming" the cylinders. what is the best way to proceed?
bigger pistons to increase displacement and compression, while using the nice rods already sized? whats the story on the coating options. currently, alumasil, and mahle pistons? (but with outer sleeved cylinders?) is that going to be an issue with disimilar metals over time and stress?
We know the alumisil has the longest track record (pun intended), nicasil, is probably ok, but no one has enough track hours to tell for sure. sleeved seems to be suspect. did i miss anything?
its probably not going to be a high rever, but if we can make it safe for 6k shifts and 400rwhp min, its going to do the job nicely.
I think fan and andersons car made 420rwhp and the only real differences were in the larger valves and porting. I can probably do some porting work, and hog out the S4 intake as well, but who knows if that will have any gains.
Thanks ALL!!!
MK
tell me about "chroming" the cylinders. what is the best way to proceed?
bigger pistons to increase displacement and compression, while using the nice rods already sized? whats the story on the coating options. currently, alumasil, and mahle pistons? (but with outer sleeved cylinders?) is that going to be an issue with disimilar metals over time and stress?
We know the alumisil has the longest track record (pun intended), nicasil, is probably ok, but no one has enough track hours to tell for sure. sleeved seems to be suspect. did i miss anything?
its probably not going to be a high rever, but if we can make it safe for 6k shifts and 400rwhp min, its going to do the job nicely.
I think fan and andersons car made 420rwhp and the only real differences were in the larger valves and porting. I can probably do some porting work, and hog out the S4 intake as well, but who knows if that will have any gains.
Thanks ALL!!!
MK
Originally Posted by Hacker-Pschorr
The only item stock in the motor he's buying is the oil pan.
He's trying to figure out the cheapest way to increase compression ratio - new pistons would be the way to go since you would need those anyway with the new coating.
He's trying to figure out the cheapest way to increase compression ratio - new pistons would be the way to go since you would need those anyway with the new coating.
10-03-2006, 04:13 PM
#243
Rennlist Member
we also need to talk about the design of stickers on the car to promote the names of those who contributed.
"Rennlist "across the hood or on the fenders, all the names covering a door or quarterpannel. Im sure there are lots of ways to do this.
Mk
"Rennlist "across the hood or on the fenders, all the names covering a door or quarterpannel. Im sure there are lots of ways to do this.
Mk
Originally Posted by Hacker-Pschorr
A few people asked to remain anonyms – I’d rather be safe than sorry so I will not be posting a donation list. I’ll be giving one to Mark so he knows.
10-03-2006, 04:35 PM
#244
This is the engine that has the cylinder rings, so boring the block may be a bit different, possibly. Infactm now that I think of it, with the material that was emoved from the outer diameter of the cylinder towers to accept the steel rings, I am not specifically sure that you would want to bore it to 104.
Hacker - I assume that Todd knows about this situation and he will be doing he work?
Hacker - I assume that Todd knows about this situation and he will be doing he work?
10-03-2006, 04:35 PM
#245
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Mark, forget the Nikasil and just get Mahle pistons custom made for this application. It will be less expensive and you know it works reliably for a long time.
10-03-2006, 04:45 PM
#247
Rennlist Member
There we go. this makes sense.
so, custom Mahle pistons it is.
now, i dont understand fullly the "cylinder rings" but it sounds like sleeving the outside of the cylinders, right? how much material was taken off? maybe we only bore 103mm or something?
mk
so, custom Mahle pistons it is.
now, i dont understand fullly the "cylinder rings" but it sounds like sleeving the outside of the cylinders, right? how much material was taken off? maybe we only bore 103mm or something?
mk
Originally Posted by FlyingDog
Mark, forget the Nikasil and just get Mahle pistons custom made for this application. It will be less expensive and you know it works reliably for a long time.
10-03-2006, 05:01 PM
#248
Originally Posted by FlyingDog
Mark, forget the Nikasil and just get Mahle pistons custom made for this application. It will be less expensive and you know it works reliably for a long time.
Someone else on the board once mentioned that they also experienced scuffing when using Kolbenschmidt pistons with a coating that was also supposed to work with the Alusil but apparently didn't.
10-03-2006, 05:02 PM
#249
Originally Posted by mark kibort
There we go. this makes sense.
so, custom Mahle pistons it is.
now, i dont understand fullly the "cylinder rings" but it sounds like sleeving the outside of the cylinders, right? how much material was taken off? maybe we only bore 103mm or something?
mk
so, custom Mahle pistons it is.
now, i dont understand fullly the "cylinder rings" but it sounds like sleeving the outside of the cylinders, right? how much material was taken off? maybe we only bore 103mm or something?
mk
10-03-2006, 05:11 PM
#250
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Originally Posted by BrendanC
Hacker - I assume that Todd knows about this situation and he will be doing he work?
10-03-2006, 05:13 PM
#251
Rennlist Member
Originally Posted by BrendanC
Its at 101 right now I think. You should probably go to the source for the info.
I think, Tim, Todd and Erik can and will take good care of Kibort including the best advice concerning this engine.
10-03-2006, 05:14 PM
#252
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Originally Posted by Larry928GTS
Is there anyone sucessfully using custom Mahle pistons in an Alusil bore? When some of the specifics of the engine were first mentioned, it was stated that these are custom Mahle pistons, and that there was some scuffing with the same kind of pistons in another engine when it was examined.
Someone else on the board once mentioned that they also experienced scuffing when using Kolbenschmidt pistons with a coating that was also supposed to work with the Alusil but apparently didn't.
Someone else on the board once mentioned that they also experienced scuffing when using Kolbenschmidt pistons with a coating that was also supposed to work with the Alusil but apparently didn't.
10-03-2006, 05:38 PM
#253
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Originally Posted by FlyingDog
Mark, forget the Nikasil and just get Mahle pistons custom made for this application. It will be less expensive and you know it works reliably for a long time.
Mark can do what he wants, this is just a suggestion.
I’m working with a reliable vendor to see what kind of a deal I can put together to prep / bore / plate the engine.
I’ll ask Todd on Wednesday if he is planning on or has even thought about doing the final assembly. I have not had a chance to talk to him for any length since this donation drive came to an end. I saw him on Saturday, when we setup the meeting for tomorrow.
Tim is out of town, I’m on my way out of town, Todd doesn’t use the internet much. So for now, keep chatting, keep the ideas flowing around – I’ll check back & update ye’all when I can.
10-03-2006, 05:42 PM
#254
Originally Posted by Hacker-Pschorr
I'll be stopping at Todd's house tomorrow to take some pictures for the web site I'm putting together of his projects. I was planning on talking to him in depth about this engine.
10-03-2006, 06:17 PM
#255
Rennlist Member
Has anyone "chromed " a block on a 928 before and raced it? Im just not familar enough with the types of coating processes. ive know stock is alusil, nicasil is what joseph has but is a more expensive process, and now we are talking about chroming. If we are talking about custom mahle pistons, why not use the coatings that are stock, since that seems to work best for the racers.
Again, just questions as i dont know enough about this stuff to comment.
mk
Again, just questions as i dont know enough about this stuff to comment.
mk
Originally Posted by Hacker-Pschorr
Word from the campfire in Green Bay (Todd being the main dude) is recommending US Chrome to plate the motor. I lost track of how many different configurations / variations of 928 motors Todd has designed and built. For this particular setup, chroming the block is his recommendation. Mahle does make an excellent product – didn’t work out as expected for this project.
Mark can do what he wants, this is just a suggestion.
I’m working with a reliable vendor to see what kind of a deal I can put together to prep / bore / plate the engine.
I’ll ask Todd on Wednesday if he is planning on or has even thought about doing the final assembly. I have not had a chance to talk to him for any length since this donation drive came to an end. I saw him on Saturday, when we setup the meeting for tomorrow.
Tim is out of town, I’m on my way out of town, Todd doesn’t use the internet much. So for now, keep chatting, keep the ideas flowing around – I’ll check back & update ye’all when I can.
Mark can do what he wants, this is just a suggestion.
I’m working with a reliable vendor to see what kind of a deal I can put together to prep / bore / plate the engine.
I’ll ask Todd on Wednesday if he is planning on or has even thought about doing the final assembly. I have not had a chance to talk to him for any length since this donation drive came to an end. I saw him on Saturday, when we setup the meeting for tomorrow.
Tim is out of town, I’m on my way out of town, Todd doesn’t use the internet much. So for now, keep chatting, keep the ideas flowing around – I’ll check back & update ye’all when I can.