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calling Ray@Raylar
Ray,
I am considering hopping up my 496Ho over the winter and I think your kit is the way to go. I studied all the posts here and went through your internet site and I have one question that I would ask you to clarify for me: I learned that the full 103 Kit makes about 525hp for about 6000$. Thats a fair offer for 100hp, I would say. But, on the other hand, for about 3000$ one will get a set of your complete heads and a set of your 1.8:1 rockers for the stock cam. Both work with the original manifold. In your FAQ section you state that this combo will make 510+hp.....? That means the "Cool gap" manifold and the cam make only 15 hp more for an additional 3000$ over the 101 kit. AND, installation should be cheaper too, because you dont have to change the cam....just changing the heads could be done without pulling the motor, at least on a single engine application with good access to the engine.... Is the torque and power curve so much better on the 103 kit? One more question regarding fuel pressure: Do you have to adjust fuel pressure somehow to meet the fuel demand for 100 additional horses? I cant think of a way without altering fuel flow and the ecu stays the same...so is there a way to increase fuel pressure without reprogramming the computer? Thanks for shedding some light on these issues. Andy |
Re: calling Ray@Raylar
I'm thinking about one of the Raylar packages also, and would like to know about this.
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Re: calling Ray@Raylar
Ditto.
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Re: calling Ray@Raylar
Ray may be at SEMA in Vegas for the week. . . that may be the reason for his lack of response.
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Re: calling Ray@Raylar
I'm also wondering what an exhaust change does to the Raylor packages. CMI, IMCO, Gil, etc
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Re: calling Ray@Raylar
I recall from some of Ray's posts that the stock Mercruiser 496HO exhaust system is a Gill designed unit and is very good in its own right with the addition of a few modifications that Ray requires as part of his package install. Subject to Ray's confirmation the comment I recall reading is not that much improvement.
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Re: calling Ray@Raylar
Originally Posted by Fountaineer
I'm also wondering what an exhaust change does to the Raylor packages. CMI, IMCO, Gil, etc
Not sure if IMCO has stepped up to the plate as of yet. There are some "claims" about the CMIs around these boards. Dave |
Re: calling Ray@Raylar
Hey Rage,
I think those post both hit at the same time :D Ray has mentioned that on the 525 package that the stock exhaust with some simple mods works fine. The CMIs sweepers produced ~15 additional hp over those mods on the Raylar dyno runs (Whipple was pressed to see that on their dyno runs) Pretty pricey hp. The need increases with the 600hp package however. Dave |
Re: calling Ray@Raylar
Originally Posted by Fountaineer
I'm also wondering what an exhaust change does to the Raylor packages. CMI, IMCO, Gil, etc
http://www2.hotboat.com/image_center...00hp_a-med.jpg |
Re: calling Ray@Raylar
It seems that, unless you go for the 600HP package, the stock exhaust will do just fine.
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Re: calling Ray@Raylar
Just got back from SEMS, What a Waste! This is no longer a real performance show! To many tires, wheels and bull****!
I am going to check our website FAQ's, but there must be some errors on those answers. The BCK103 kit does make an honest 525HP as quite a few users who have already dyno'ed can attest to. Just adding heads only and no cam change and using a stock manifold , we and others have made 485HP on the dyno, but thats it and the peak horsepower came at 4900rpms. The problem here is rpms. Take the stock 496 with our heads over 4900 rpms which is needed for higher speeds and the power drops off drastically between 4900 and 5200 rpms, because the manifold and cam just run out of air. You guys have to keep remembering that an engine is an air pump, cut off the air supply and power goes away! You cannot use 1.8 rockers on the stock 496 because the 425HP HO cam has about .500" lift with 1.7 stock rockers and the addtional lift of 1.8 rockers will result in piston to valve clearances that are two small and can result in broken motors. If some of you are happy at 4900rpms with prop speed then just a head change can get you 60 more horsepower. As for fuel pressures. With our kit we provide the special parts to upgrade the stock Mercury fixed pressure fuel system that runs at 43psi., to be increased to 50 psi. , which is were the BCK103 - 525HP kit is designed to run. When you consider that a 496 with our kit after stock exhaust mods and be increased to about 540-550HP with better headers. I think the 525HP BCK103kit represents a great power increase without spending $3-4K on aftermarket headers. For those who have the coin and like the "bling" of aftermarket exhausts, be my guest and enjoy even more power. As for our HO600 motors, they are a real 600HP to at 5100 rpms, but they represent a significantly higher investment in motors and require other system upgrades such as forged internals, headers, upgraded fuel system, upgraded oil cooler, larger throttle body, ECM mods and the careful "blueprinting" that they receive during buildup. When you ask yourself, where can I get a "real 600HP blueprinted" marine motor that will drop in in place of my stock 496 for about $14K complete with everything needed except the header or exhaust system and will run on my ECM with some mods and retain the Mercury Guardian system, then you can realize what a great buy they really are. Just try shopping for anybody elses reliable 600HP naturally aspirated EFI electronic marine "blueprinted" motor that will drop in in place of your 496 and I think you will answer your own "question." Speed and power do cost money, so how much do you want? We at Raylar as well as many of our satisfied customers know that we offer the most reliable power upgrades for the 496 engine at very affordable prices. We will be exhibiting and releasing our new 600 cubic inch 750HP naturally aspirated 496 based motor at the LA and Miami boat shows and with its new awesome looking fuel injection system and horsepower and torque levels it should WOW a few in the industry! The price may even scare a few so called competitors do death! Hope I have clarified some more questions about our products and maybe even wetted some more appitites! Best Regards, Ray @ Raylar |
Re: calling Ray@Raylar
Originally Posted by Raylar
Just got back from SEMS, What a Waste! This is no longer a real performance show! To many tires, wheels and bull****!
I am going to check our website FAQ's, but there must be some errors on those answers. The BCK103 kit does make an honest 525HP as quite a few users who have already dyno'ed can attest to. Just adding heads only and no cam change and using a stock manifold , we and others have made 485HP on the dyno, but thats it and the peak horsepower came at 4900rpms. The problem here is rpms. Take the stock 496 with our heads over 4900 rpms which is needed for higher speeds and the power drops off drastically between 4900 and 5200 rpms, because the manifold and cam just run out of air. You guys have to keep remembering that an engine is an air pump, cut off the air supply and power goes away! You cannot use 1.8 rockers on the stock 496 because the 425HP HO cam has about .500" lift with 1.7 stock rockers and the addtional lift of 1.8 rockers will result in piston to valve clearances that are two small and can result in broken motors. If some of you are happy at 4900rpms with prop speed then just a head change can get you 60 more horsepower. As for fuel pressures. With our kit we provide the special parts to upgrade the stock Mercury fixed pressure fuel system that runs at 43psi., to be increased to 50 psi. , which is were the BCK103 - 525HP kit is designed to run. When you consider that a 496 with our kit after stock exhaust mods and be increased to about 540-550HP with better headers. I think the 525HP BCK103kit represents a great power increase without spending $3-4K on aftermarket headers. For those who have the coin and like the "bling" of aftermarket exhausts, be my guest and enjoy even more power. As for our HO600 motors, they are a real 600HP to at 5100 rpms, but they represent a significantly higher investment in motors and require other system upgrades such as forged internals, headers, upgraded fuel system, upgraded oil cooler, larger throttle body, ECM mods and the careful "blueprinting" that they receive during buildup. When you ask yourself, where can I get a "real 600HP blueprinted" marine motor that will drop in in place of my stock 496 for about $14K complete with everything needed except the header or exhaust system and will run on my ECM with some mods and retain the Mercury Guardian system, then you can realize what a great buy they really are. Just try shopping for anybody elses reliable 600HP naturally aspirated EFI electronic marine "blueprinted" motor that will drop in in place of your 496 and I think you will answer your own "question." Speed and power do cost money, so how much do you want? We at Raylar as well as many of our satisfied customers know that we offer the most reliable power upgrades for the 496 engine at very affordable prices. We will be exhibiting and releasing our new 600 cubic inch 750HP naturally aspirated 496 based motor at the LA and Miami boat shows and with its new awesome looking fuel injection system and horsepower and torque levels it should WOW a few in the industry! The price may even scare a few so called competitors do death! Hope I have clarified some more questions about our products and maybe even wetted some more appitites! Best Regards, Ray @ Raylar Are the numbers "4900rpms ..... then just a head change can get you 60 more horsepower" based on a 100% stock Mercruiser exhaust system? If these numbers are based upon a stock Mercruiser exhaust system what would be the rpms/ hp numbers with the your heads and the modifications to the stock Mercruiser exhaust system? What increase in crankshaft horsepower does the addition of your stainless steel roller tappets alone provide? Best Regards |
Re: calling Ray@Raylar
Ray?
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Re: calling Ray@Raylar
Rage:
To answer your questions as best I can. Yes our cylinder heads can provide about 60HP over stock heads on a stock 496HO. this was confirmed recently by Tom and crew at Flagship Marine when they dyno'ed just this change out only. For an airboat motor. The problem though becomes that this +60hp appears at 4900 rpms and when the motor is reved up to the 5150 rpm rev limit it runs out of air and losses power above 4900 rpms. This is because the stock intake manifold cannot supply enough air above 4900 rpms and its just the limit the stock cam can supply above that rpm. All our horsepower numbers are rated at the crankshaft and are measured on calibrated dyno tests to SAE standards and measured specific fuel gravities of 87 octane fuel used for that test. We have several other dyno tests done on varoius independant dynos and they all seem to come in between the 525-530HP range on our 103 kits on the stock Mercury exhaust manifolds. With good after market headers such as CMI and Bassetts I would expect to see about another 25 to 30HP over these numbers. Any good roller rocker including ours will add about 10hp at peak rpm but more important it will tend to stabilize valve train and valve spring actions and make sure the valve train can reliably run at high prms where the peak power occurs. Regards. Ray @ Raylar |
Re: calling Ray@Raylar
Thanks Ray!
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Re: calling Ray@Raylar
Originally Posted by Raylar
Rage:
To answer your questions as best I can. Yes our cylinder heads can provide about 60HP over stock heads on a stock 496HO. this was confirmed recently by Tom and crew at Flagship Marine when they dyno'ed just this change out only. For an airboat motor. The problem though becomes that this +60hp appears at 4900 rpms and when the motor is reved up to the 5150 rpm rev limit it runs out of air and losses power above 4900 rpms. This is because the stock intake manifold cannot supply enough air above 4900 rpms and its just the limit the stock cam can supply above that rpm. All our horsepower numbers are rated at the crankshaft and are measured on calibrated dyno tests to SAE standards and measured specific fuel gravities of 87 octane fuel used for that test. We have several other dyno tests done on varoius independant dynos and they all seem to come in between the 525-530HP range on our 103 kits on the stock Mercury exhaust manifolds. With good after market headers such as CMI and Bassetts I would expect to see about another 25 to 30HP over these numbers. Any good roller rocker including ours will add about 10hp at peak rpm but more important it will tend to stabilize valve train and valve spring actions and make sure the valve train can reliably run at high prms where the peak power occurs. Regards. Ray @ Raylar |
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