KE 825 EFI's
#21
Registered
Join Date: Mar 2002
Location: Lake St. Clair
Posts: 2,975
Likes: 0
Received 0 Likes
on
0 Posts
http://www.chiefengines.com/ 93
http://www.cobrapower.com/Motors.htm 93
Pretty sure Eddie Young uses 93 on most engines
http://www.pfaffengines.com/1000sc.shtml 91
Hate to bring facts into this, Seems 93 is not 89????
Last edited by dkwestern; 12-08-2009 at 03:47 PM.
#22
Registered
Join Date: Jan 2005
Location: Northern VA
Posts: 1,047
Likes: 0
Received 0 Likes
on
0 Posts
#23
Registered
http://potterperformance.com/ENGINES.html 93
http://www.chiefengines.com/ 93
http://www.cobrapower.com/Motors.htm 93
Pretty sure Eddie Young uses 93 on most engines
http://www.pfaffengines.com/1000sc.shtml 91
Hate to bring facts into this, Seems 93 is not 89????
http://www.chiefengines.com/ 93
http://www.cobrapower.com/Motors.htm 93
Pretty sure Eddie Young uses 93 on most engines
http://www.pfaffengines.com/1000sc.shtml 91
Hate to bring facts into this, Seems 93 is not 89????
One other thing is that all of my engines make quite a bit more than the published number. For example, the last 925 efi I did made 1028 hp on 93 octane. Obviously, a lower octane will cost some power, but it will not be as far under the published 93 octane number as you would think, since they make so much more than the published hp number.
I think that is a big advantage to using a custom builder. You can have your engine build to run on whatever fuel you want. If I set it up for 87 octane, then it will run on 87 octane. It will still have the same warranty as any other engine I build. Hope this helps clear up some of the confusion. Thanks.
Eddie
#26
Platinum Member
Platinum Member
what would be cool if you could have a dial or switches that say... 87/980hp.. 89/1100.. 91/1200.. 93/1268.. RF/????
a computer would do all the adjusting for the different fuels..
a computer would do all the adjusting for the different fuels..
#28
Registered
Thread Starter
Join Date: Jan 2003
Location: Stafford Va.
Posts: 2,806
Likes: 0
Received 0 Likes
on
0 Posts
You are correct. The engines as listed on my site are for 91/93 octane, whichever is available. However, they can all be set up to run 89 or even 87 if you wish. My 1200 will still make well over 1000 hp on 87 octane. It will make over 1100 hp on 89 octane. I was able to make over 1300 hp (1326 actually) on 93 octane.
One other thing is that all of my engines make quite a bit more than the published number. For example, the last 925 efi I did made 1028 hp on 93 octane. Obviously, a lower octane will cost some power, but it will not be as far under the published 93 octane number as you would think, since they make so much more than the published hp number.
I think that is a big advantage to using a custom builder. You can have your engine build to run on whatever fuel you want. If I set it up for 87 octane, then it will run on 87 octane. It will still have the same warranty as any other engine I build. Hope this helps clear up some of the confusion. Thanks.
Eddie
One other thing is that all of my engines make quite a bit more than the published number. For example, the last 925 efi I did made 1028 hp on 93 octane. Obviously, a lower octane will cost some power, but it will not be as far under the published 93 octane number as you would think, since they make so much more than the published hp number.
I think that is a big advantage to using a custom builder. You can have your engine build to run on whatever fuel you want. If I set it up for 87 octane, then it will run on 87 octane. It will still have the same warranty as any other engine I build. Hope this helps clear up some of the confusion. Thanks.
Eddie
#29
Registered
Well, I really can't answer that with a definitive answer. All I can do is guess, since I haven't done it before. I am confident that you could go to 250-300 hours. At that point, the top end would absolutely have to be done, along with a new belt for the Jesel belt drive. I have never pushed the bottom end that far (in an engine that large) but I really don't see why it would not go that far. I have a pair now that made just under 1000 hp (972 hp) and they are approaching 300 hrs.(about 280 hrs). They are in excellent health and we are debating what to do....to rebuild or not this winter. I think we may let them go another year. They have had excellent maintenance and the oil filters get cut open on a regular basis to be sure they are clean.
I'm not going to bs you and say that they will definitely last for 500 hours. I honestly can not say for sure. I do think they will be fine judging from past rebuilds. I have done a quite a few in the 250 hr range and they looked excellent. The reality is that once you have the engines out of the boat and you have the heads and valvetrain out, it really isn't that much more to do the bottom end. All of my customers have seen it that way as well. That is why I have never let one go that far. You are only talking about a couple grand to just do the whole thing. In the grand scheme of things it is not that big of a deal. However, I would still love to run one that far. So, when do you want to get started???
Eddie
I'm not going to bs you and say that they will definitely last for 500 hours. I honestly can not say for sure. I do think they will be fine judging from past rebuilds. I have done a quite a few in the 250 hr range and they looked excellent. The reality is that once you have the engines out of the boat and you have the heads and valvetrain out, it really isn't that much more to do the bottom end. All of my customers have seen it that way as well. That is why I have never let one go that far. You are only talking about a couple grand to just do the whole thing. In the grand scheme of things it is not that big of a deal. However, I would still love to run one that far. So, when do you want to get started???
Eddie
#30
Registered
Thread Starter
Join Date: Jan 2003
Location: Stafford Va.
Posts: 2,806
Likes: 0
Received 0 Likes
on
0 Posts
I do all my own work till the motors come out so oil is changed every 10-20 hours depending on how it was run and I do comp. and leak down every 50 or so then if it's still good at around 200 hours I change valve springs in the boat. So I dont plan on pulling the motors till around 4-5 hundred hours. Then yes I would do the whole thing. My last motors were fine in that time line but they were only 800-850 hp. Do you replace the valves in your big hp motors and do a full valve job or just springs?