PSI 8.8 liter / 550ci ???
10-26-2022, 11:16 AM
#21
Registered
iTrader: (1)
The PSI rotating assembly is a great base. The big question is are you doing the HO600 or the HO525 package?
Somebody post the link/picture of the River Speed and Marine heads. Are they compared to the Raylar stock aluminum heads or the Raylar racing CNC heads?
FWIW, the Raylar heads were designed by Reher-Morrison and 10 years ago, I dropped them off at 2 places to port them and everybody knew the story behind them and insisted that the only thing they would do is screw them up. That was 10 years ago but they are pretty decent bang for the buck.
Somebody post the link/picture of the River Speed and Marine heads. Are they compared to the Raylar stock aluminum heads or the Raylar racing CNC heads?
FWIW, the Raylar heads were designed by Reher-Morrison and 10 years ago, I dropped them off at 2 places to port them and everybody knew the story behind them and insisted that the only thing they would do is screw them up. That was 10 years ago but they are pretty decent bang for the buck.
The following 2 users liked this post by SB:
Dragracer_Art (10-26-2022), hogie roll (10-26-2022)
10-26-2022, 12:53 PM
#22
Registered
Thread Starter
The PSI rotating assembly is a great base. The big question is are you doing the HO600 or the HO525 package?
Somebody post the link/picture of the River Speed and Marine heads. Are they compared to the Raylar stock aluminum heads or the Raylar racing CNC heads?
FWIW, the Raylar heads were designed by Reher-Morrison and 10 years ago, I dropped them off at 2 places to port them and everybody knew the story behind them and insisted that the only thing they would do is screw them up. That was 10 years ago but they are pretty decent bang for the buck.
Somebody post the link/picture of the River Speed and Marine heads. Are they compared to the Raylar stock aluminum heads or the Raylar racing CNC heads?
FWIW, the Raylar heads were designed by Reher-Morrison and 10 years ago, I dropped them off at 2 places to port them and everybody knew the story behind them and insisted that the only thing they would do is screw them up. That was 10 years ago but they are pretty decent bang for the buck.
10-26-2022, 01:15 PM
#23
Registered
River Speed and Marine, contact Trey for more info.
The following 4 users liked this post by 87MirageIntruder:
Cerberus66 (10-26-2022), Dragracer_Art (10-27-2022), Gimme Fuel (10-27-2022), hogie roll (10-26-2022)
10-26-2022, 01:31 PM
#24
Registered
Gen 7 LS BBC
The following 2 users liked this post by 87MirageIntruder:
Cerberus66 (10-26-2022), Dragracer_Art (10-27-2022)
10-26-2022, 02:26 PM
#25
Yes the PSI block is just that amazing. PSI has several variations of that block for its different applications. The best block is the R block shown above. Superior in every single way. Very literally built for high cylinder pressures and high rpm. Those LS based heads are an absolute improvement over any stock 8.1 head ever produced. I own River Speed and Marine. We started on this journey years ago when Larry and Raylar had only seen about 800 hp max on a 496. I built one with HP3 heads and a procharger that leveled out to approximately 1700HP before breaking a crankshaft.
RSM had a deal with PSI to build these motors for the OEM world. RSM is an EPA certified OEM for spark ignition marine engines. Unfortunately Covid and supply chain issues kept us from opening. We wanted to order 200 blocks but what was given to us was 10 complete blocks and they opened the door to these mystery heads. I have heard about these heads for some time. I could not get PSI to let me buy them. They finally relented in December 2021. They are amazing, Injector over intake valves, injector in head, 15 Degree valve angles massively reduced shrouding, small combustion chambers. LS Exhaust rocker arms. ETC. Substantially larger cooling between intake and exhaust valves. the list goes on.
The intake picture above was design by Arizona Speed and Marine for GM "back in the day" ASM still manufactures ALL the Mercury Blue motor intakes and still to this day designs intakes for Mercury Racing.
We are currently building for testing 2 variations of the 9.0L motor. We go to a complete 9.0 liter 547/548 CID on this block. The two variations are LS9M and LS9R, those designations are for us internally. The M Series is being designed for a 600hp/600tq 496 replacement using stock 496 heads, drop in and plug and play. for under 10K way under 10K using forged internals. There are some very tricky issues with this as the EPA has some very hard rules and laws about this.
The R series motor uses the LS style head, It is currently being ported and plotted for CNC use. We are making the R LS head to flow low 400CFM with large valves. We will produce our results when we have the complete recipe. The R motor we are shooting for 800-900 NA with a redline of about 7100 rpm mild idle and DBW. We will also be using Procharger to boost the very same engine to make 1200-1700 hp on race fuel.
Frankly its lost cause though. The market for 496 replacement engines growing but that's it. NEW OEM GEN 7 motors just wont be used.
RSM is going to finish this project publish its results and formula but we are moving on to the extreme HP hybrid marine propulsion systems. Using micro turbines and the latest water cooled EV motors and water cooled battery packs.
We also partnered with MDC to produce the anticavitation device for bravo drives and we have worked with other companies to design and build other products.
Engine development is slow and costly but we are getting there and sharing this data with part manufacturers so there is place for engine builders to go to for timed out 496 owners who need replacement blocks.
We are currently doing a build for GripTec/ZPE/employee we will have this done in December and they will publish the results. It will be the M series motor using 3.3 whipple and 555 ecu.
We consider Raylar a friend, Larry has spent 100's of thousands of dollars on the development of the 496. His work, (Larry's) should be respected. it was a tragic and only a financial move that GM sold off the venerable 496 in the midst of the financial crisis. That move alone was crushing to the leaders of the day such as:
Raylar
Innovation Marine (they still have 20 brand new in crate HP3 Motors)
Arizona Speed and Marine
Hope this helps.
RSM had a deal with PSI to build these motors for the OEM world. RSM is an EPA certified OEM for spark ignition marine engines. Unfortunately Covid and supply chain issues kept us from opening. We wanted to order 200 blocks but what was given to us was 10 complete blocks and they opened the door to these mystery heads. I have heard about these heads for some time. I could not get PSI to let me buy them. They finally relented in December 2021. They are amazing, Injector over intake valves, injector in head, 15 Degree valve angles massively reduced shrouding, small combustion chambers. LS Exhaust rocker arms. ETC. Substantially larger cooling between intake and exhaust valves. the list goes on.
The intake picture above was design by Arizona Speed and Marine for GM "back in the day" ASM still manufactures ALL the Mercury Blue motor intakes and still to this day designs intakes for Mercury Racing.
We are currently building for testing 2 variations of the 9.0L motor. We go to a complete 9.0 liter 547/548 CID on this block. The two variations are LS9M and LS9R, those designations are for us internally. The M Series is being designed for a 600hp/600tq 496 replacement using stock 496 heads, drop in and plug and play. for under 10K way under 10K using forged internals. There are some very tricky issues with this as the EPA has some very hard rules and laws about this.
The R series motor uses the LS style head, It is currently being ported and plotted for CNC use. We are making the R LS head to flow low 400CFM with large valves. We will produce our results when we have the complete recipe. The R motor we are shooting for 800-900 NA with a redline of about 7100 rpm mild idle and DBW. We will also be using Procharger to boost the very same engine to make 1200-1700 hp on race fuel.
Frankly its lost cause though. The market for 496 replacement engines growing but that's it. NEW OEM GEN 7 motors just wont be used.
RSM is going to finish this project publish its results and formula but we are moving on to the extreme HP hybrid marine propulsion systems. Using micro turbines and the latest water cooled EV motors and water cooled battery packs.
We also partnered with MDC to produce the anticavitation device for bravo drives and we have worked with other companies to design and build other products.
Engine development is slow and costly but we are getting there and sharing this data with part manufacturers so there is place for engine builders to go to for timed out 496 owners who need replacement blocks.
We are currently doing a build for GripTec/ZPE/employee we will have this done in December and they will publish the results. It will be the M series motor using 3.3 whipple and 555 ecu.
We consider Raylar a friend, Larry has spent 100's of thousands of dollars on the development of the 496. His work, (Larry's) should be respected. it was a tragic and only a financial move that GM sold off the venerable 496 in the midst of the financial crisis. That move alone was crushing to the leaders of the day such as:
Raylar
Innovation Marine (they still have 20 brand new in crate HP3 Motors)
Arizona Speed and Marine
Hope this helps.
The following 8 users liked this post by Cerberus66:
87MirageIntruder (10-26-2022), Dragracer_Art (10-27-2022), Gimme Fuel (10-27-2022), OLDRAT (10-28-2022), Ryan00TJ (10-26-2022), ThisIsLivin (10-26-2022), Unlimited jd (11-10-2022), Wellcraft1 (11-04-2022)
10-26-2022, 02:32 PM
#26
One more thing. WORLD does not cast these. They did not design this. PSI still uses the external casting box for these motors and if you call World, they will tell you they do not manufacture or design anything you are seeing. Its simply an external casting box that still has those markings.
The following users liked this post:
Dragracer_Art (10-27-2022)
11-01-2022, 12:46 PM
#27
Registered
Thread Starter
One more thing. WORLD does not cast these. They did not design this. PSI still uses the external casting box for these motors and if you call World, they will tell you they do not manufacture or design anything you are seeing. Its simply an external casting box that still has those markings.
Ive found a few rebuildable cores online and would prefer the "R" block and better heads if I can narrow down some of the visible details.
Are the head-mounted injectors exclusive to the trunnion style rockers and shallow valve angles ? or is that prototype-only stuff ?
I also see the bolt-on intake valley pan... is that exclusive to the better block ? or do they all look similar ?
Thanks in advance... just trying to nail down a good core to play with.
11-01-2022, 01:05 PM
#28
Is there any way to determine which blocks are which from an external "junkyard" viewpoint ?
Ive found a few rebuildable cores online and would prefer the "R" block and better heads if I can narrow down some of the visible details.
Are the head-mounted injectors exclusive to the trunnion style rockers and shallow valve angles ? or is that prototype-only stuff ?
I also see the bolt-on intake valley pan... is that exclusive to the better block ? or do they all look similar ?
Thanks in advance... just trying to nail down a good core to play with.
Ive found a few rebuildable cores online and would prefer the "R" block and better heads if I can narrow down some of the visible details.
Are the head-mounted injectors exclusive to the trunnion style rockers and shallow valve angles ? or is that prototype-only stuff ?
I also see the bolt-on intake valley pan... is that exclusive to the better block ? or do they all look similar ?
Thanks in advance... just trying to nail down a good core to play with.
PSI made three different valley pans, three different intakes th elates of which has orings around the ports.
ALL the LS Style heads have injector in head
11-01-2022, 01:09 PM
#29
the picks you show should have Kellogg Heat induction forged cranks. Scat manufactured prostock rods. Some also have forged pistons. Dished pistons are 9.1 Flat tops are 10.1. All the rods are bushed.
