Rebuild on 850's
#21
Registered
Join Date: Jun 2010
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
[youtube]watch?v=-RF3krHbGdw[/youtube]
Last edited by CAM; 12-25-2010 at 02:53 AM.
#22
Registered
Platinum Member
Join Date: Apr 2005
Location: Union N.J.
Posts: 418
Likes: 0
Received 0 Likes
on
0 Posts
What's a 2.3 or 2.9 Unit??? By the way... That motor doesn't sound too good at the end of that tape....
Last edited by maxonmike; 12-25-2010 at 05:41 AM. Reason: Sounds like it done blown up.....
#23
Registered
The 1075's are no where near out of blower. There is no need to replace the 2.3's. I have used 2.3L quads in the past to make well over 1400 hp. The biggest hurdle is the ecm. Both the 850 and 1075 have an electronic boost bypass that controls the boost. The only way to increase the boost is by programming it into the ecm. You can change the pulleys all you want and it won't help unless you get into the ecm. That is why I said to get the ecm from the 1075 to put on your 850.
By the way, the Merc 1200's use the same 2.3 L quads as the 850 and 1075.
Eddie
By the way, the Merc 1200's use the same 2.3 L quads as the 850 and 1075.
Eddie
#24
Registered
Thread Starter
Join Date: Aug 2004
Location: Roswell, Ga
Posts: 975
Likes: 0
Received 0 Likes
on
0 Posts
#25
Registered
Join Date: Jun 2010
Posts: 41
Likes: 0
Received 0 Likes
on
0 Posts
The 1075's are no where near out of blower. The biggest hurdle is the ecm. Both the 850 and 1075 have an electronic boost bypass that controls the boost. The only way to increase the boost is by programming it into the ecm.
By the way, the Merc 1200's use the same 2.3 L quads as the 850 and 1075.
Eddie
By the way, the Merc 1200's use the same 2.3 L quads as the 850 and 1075.
Eddie
Even more so then I'd imagine with the 2.9 units and reprogramming the ecm you'd be able to go 1500+ without too much fuss.
#26
Registered
Join Date: Oct 2000
Location: Fresno, CA, 93722, USA
Posts: 1,436
Likes: 0
Received 4 Likes
on
4 Posts
The stock 2.3's are actually very near capacity because of the bypass system. They're turning just over 14,000 at stock peak engine rpm which was the mfg's max rpm.
We pickup 150-hp by lowering blower speed with the larger SC's. Just upgrading to the 1075 cam, pulley, belt, springs and PCM upgrade would be a world of difference.
The stock motors we tested made 1053hp in stock trim. With our large SC's, it made 1240hp on pump gas, then made 1375 on race gas.
The motor is fine on the high RPM, thats what they sound like at 6000+.
We rebuild the factory SC's, which should be done around 250 hours on 1075's. We also have more efficient 2.3 liters and the larger 2.9 liters.
We pickup 150-hp by lowering blower speed with the larger SC's. Just upgrading to the 1075 cam, pulley, belt, springs and PCM upgrade would be a world of difference.
The stock motors we tested made 1053hp in stock trim. With our large SC's, it made 1240hp on pump gas, then made 1375 on race gas.
The motor is fine on the high RPM, thats what they sound like at 6000+.
We rebuild the factory SC's, which should be done around 250 hours on 1075's. We also have more efficient 2.3 liters and the larger 2.9 liters.