DHADLEY

[Don CHICHO]

I OWN A JOHNSON 140 H.P., Looper,1987, with Lighweight flywheel, Carbs velocity stacks, 1986 Intake Manifold, RAPAIR Pack, Coils, Stator & Timer, Heads Milled .030", Timing 16 degrees,,Land & Sea Solid Upper & Lower Mounts,<br />Exhaust Releiving, Bob's Machine Nose Cone.<br /><br />I would like to know how to Modify my present Intake Manifold. My TOP RPM is 7,000 , using a Drag 3, Performance Propeller (TIM HACKNEY)<br />13.5X24 in an Allison Racing XR-2002 Boat<br /><br />I'm using in my engine a 95 RON Unleaded Fuel with a Pennzoil 100% Synthetic Oil (40:1)<br /><br />Thanks,<br />DON<br /><br />DonChicho71@hotmail.com

 

[Dhadley]

Re: DHADLEY

Why do you have the timing at 16 degrees?

 

[Don CHICHO]

Re: DHADLEY

A FRIEND TOLD ME, with .030" SHAVED HEADS<br />I MUST STAY AT 16 DEGREES , USING RON 95 OCTANE GAS.<br /><br />I WOULD APPRECIATED ANY ADVICE, TO IMPROVE MY ACCELERATION & TOP SPEED.<br /><br />THANKS,<br />DON<br /><br />P.S.: DO YOU THINK I MUST STAY WITH 18 DEGREES??

 

[Dhadley]

Re: DHADLEY

First, in the intrest of safety, keep a close watch on the port stern bracket. With solid upper mounts in an E/J, the port stern bracket tends to split. The steering gets a little goofy when the motor falls off.<br /><br />What have you done with the jetting? Without the airbox you should richen up by 12 to 15 numbers.

 

[Don CHICHO]

Re: DHADLEY

YES, ACTUALLY I DON'T REMEMBER THE #. BUT I RICHEN THE MAIN JETS AND DECREASED THE AIR JETS<br />I THINK A 16 .<br />BUT I NEED TO KNOW IF I STAY WITH 16 DEGREES MAX. TIMING OR I SHOULD MOVE TO 18 ?????<br />USING 95 RON UNLEADED GAS .<br /><br />THANKS A LOT,<br />DON

 

[Don CHICHO]

Re: DHADLEY

OHHHH, FORGOT. MAY I STAY USING THE 1986 INTAKE MANIFOLD ????<br /><br />DON

 

[Dhadley]

Re: DHADLEY

OK good. We always got the motors to run better/quicker running the airbox but thats OK for now. As long as you are rich enough it'll be fine.<br /><br />Are you still running a 1987 powerhead? IE -- the small bore block?

 

[Don CHICHO]

Re: DHADLEY

O.K. BUT, 16 or 18 DEGREES BTDC ????<br /><br />DON

 

[Dhadley]

Re: DHADLEY

The catch is to be positive youre running rich enough. If so Go to 18 degrees and test.<br /><br />What spark plugs are you running?

 

[Don CHICHO]

Re: DHADLEY

CHAMPION QL78YC, GAPPED AT .030" <br /><br />THANKS,<br />DON

 

[Dhadley]

Re: DHADLEY

Keep an eye on the long reach (Y) plugs with the cut heads. Let me know how you make out testing at 18 degrees.<br /><br />Are you still running the small bore block?

 

[Don CHICHO]

Re: DHADLEY

YEAP!!!, SMALL BORE BLOCK .<br />CAN I BE ABLE TO ADJUST THE MAX. TIMING AT MY GARAGE ??? INSTEAD OF THE BOAT RAMP.<br />IF THERE ARE A LOT OF DIFFERENCE IN SETTING THE MAX. TIMING ????<br /><br />ALSO, I WOULD LIKE TO USE AN OCTANE BOOSTER, LIKE 104 + OR NOS . ANY ADVANTAGE ????<br /><br />DON

 

[Dhadley]

Re: DHADLEY

Once we get into modified motors we really dont adjust the timing with a light. Once you have your starting point, which you do, we adjust it with testing. For every turn of the timing stop screw the timing will change approx 1 degree. Back the screw out 2 turns and test. This should be about 20 degrees. Be careful to start your jetting check at 2500 to 3000 and go up in small increments. <br /><br />I would stick with straight gas and no addatives. I dont like to use cut heads. If you really want to be safe, use avaiation fuel. Its a low lead fuel usually around 100 octane. Or some type of race fuel. Whatever you chose, stick with it. Be consistant. You are getting ready to change everything else.

 

[Don CHICHO]

Re: DHADLEY

O.K. . THANKS A LOT.<br /><br />BY THE WAY, I'M SEARCHING FOR AN EVOLUTION MARINE INTAKE MANIFOLD ( NO LONGER AVAILABLE !!!).<br /><br />DON

 

[Dhadley]

Re: DHADLEY

The Evolution intakes are pretty aren't they? The downside is that I dont think Marvin makes the reeds that are required anymore. <br /><br />What this manifold does is align the reeds so they are centered in the passages in the front half of the block for better flow. <br /><br />You can do the same thing with your stock manifold. To do this you will need a front half to bolt the manifold to so you can turn it around and look at the reeds as the proceedure is done.<br /><br />Are you running in a class that has specific rules? If so, what are the rules and sanctioning body? OBDA? APBA?

 

[Don CHICHO]

Re: DHADLEY

NO RULES. ONLY V4's . YOU CAN DO EVERYTHING !!!<br />O.K., I WILL CHECK THE INTAKE, BUT ACTUALLY I'M USING A STOCK RUBBER COATED REED CAGES, THAT I WOULD LIKE TO BE MODIFIED OR MAYBE, TO BUY A SET OF PERFORMANCE ONES.<br /><br />TOMORROW, I WILL MOVE MY TIMING TO 18 .<br /><br />THANKS,<br />DON

 

[Dhadley]

Re: DHADLEY

Marvin is a friend of mine and his intakes really do help. But we've found that modifying (re-aligning) your reed cages work just as well. But his are way cooler looking!! If youre serious about buying one I'll see if I can find mine. <br /><br />No rules, huh? That changes everything. What kind of budget do we have? We just went from making an SST100 powerhead to a Formula II.

 

[walleyehed]

Re: DHADLEY

Dhadley is currently trying to find his brain bucket....I can see the wheels turning from here <br />G DANE, if yer watchin', take notes!!!

 

[Don CHICHO]

Re: DHADLEY

O.K., DHADLEY . IF YOU CAN GET AN EVOLUTION MARINE INTAKE MANIFOLD, PLEASE LET ME KNOW .<br /><br />WHAT'S YOUR OPINION ON OMC'S COILS ?????<br /><br />THANKS,<br />DON

 

[Dhadley]

Re: DHADLEY

I'll let you know next week. I'll look this weekend.<br /><br />We never really had any problems with the E/J coils. We ran them over 9K with no problem.<br /><br />Tell us about the fuel syatem in the boat. Are you using an electric pump?<br /><br />So what is the budget anyway?