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Waterdog ![]() Grand Poobah ![]() ![]() Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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Should I use the stock carb spacer or not, with a Weiand stealth intake ?
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SS 201 ![]() Senior Member ![]() Joined: October-20-2003 Location: United States Status: Offline Points: 232 |
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I used one with mine to get a better angle.
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21165 |
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I reused my spacer. Im thinking of going with an open spacer instead of the 4-hole, though.
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Waterdog ![]() Grand Poobah ![]() ![]() Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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The engine is a 351W (bored)stealth intake,gt40p (ported),1.7 cobra roller rockers cam reasch cam, windage tray, crane d/r timing set, 4160 carb & 540 acme prop. I'm really hoping for 320 hp & 50 mph ? (Silver Nautique 86 2001)
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21165 |
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I would say 50mph is a reasonable goal with that engine package in a 2001 hull. Out of curiousity, why the 1.7rr's if you upgraded the cam? You could have stuck with the stock 1.6 ratio, right?
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Waterdog ![]() Grand Poobah ![]() ![]() Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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My original block was cracked when I got the boat(I knew it was bad).I "found" another block out of a bronco with the intake & rockers in the deal. The heads I picked up, I ported myself. I think are just right. Cleaned up the intake bowl, cleaned up the exhaust bowl.& worked the roof of the exh. runner & gasket matched the intake(very little off the intake) & heads.
Also I just picked up a set of NOS DOOE heads that were never installed. |
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lewy2001 ![]() Grand Poobah ![]() ![]() Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Tim I found this information about carb spacers thought you might be interested before modding yours.
Carb Spacers I have managed to source a Stealth intake also. Went through your old threads and found that I will have to shorten or change flame arrestor to fit the spacer with the Stealth. I have 2" clearance at the moment looks like I need 2.5". |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21165 |
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Lewy, Ive seen the blended style of spacer before- they really look awesome and are supposed to provide the best of both worlds. The $120 pricetag hurts though!
If youve got 2" of clearance, then you may luck out. 2" is about the shortest arrestor you can fit on a Holley and not have it too hung up on the j-tubes. Thats what Ive got on my boat. |
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GottaSki ![]() Grand Poobah ![]() Joined: April-21-2005 Location: NE CT Status: Offline Points: 3355 |
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Yes, CC's appear to have specified a much taller arrestor than was typical on the PCMs you see on other boats.
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Waterdog ![]() Grand Poobah ![]() ![]() Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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I know I'm AFU - but I'm using a Moroso 14" low profile air cleaner and instead of a 3" filter I made a 2 5/8 flame arrester of stainless screen and stainless perforated .032 sheet metal.It clears the J tubes by 1/8 inch. USCG approved AHHH - SAFE YES. That's as low as I could get.
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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[QUOTE=TRBenj] The $120 pricetag hurts though!
QUOTE] Tim good news, with the exchange rate it's only $111 ![]() |
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lewy2001 ![]() Grand Poobah ![]() ![]() Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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May have misled you a bit. I have 2" available above the existing arrestor with the PCM cover on it. The Stealth is 2.5" taller than the standard manifold according to the old posts. So I will need to adjust either the arrestor or engine cover. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21165 |
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Gotcha. Either way, you should be good by swapping arrestors. I assume your stock piece is 3" tall? |
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behindpropeller ![]() Platinum Member ![]() Joined: July-31-2006 Status: Offline Points: 1810 |
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I could make up a few of those for around $50 each. They would only take 30 mins of so on our cnc mill. Tim |
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YooperSully ![]() Senior Member ![]() ![]() Joined: August-07-2009 Location: Hancock,MI Status: Offline Points: 316 |
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All right I'm curious. Can I bolt one of these intakes on without any other mods? And second, is it the 8023 for our engine?
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87' 2001
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bud@cmenow.com ![]() Newbie ![]() Joined: November-23-2008 Location: United States Status: Offline Points: 6 |
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are you using a flat spacer or a wedge spacer. if you are looking for an open wedge spacer, then i have one i tryed and didn't like. i will sell to you forty $40 icluding shipping. the 4 hole works much better on my 302. you might want to go to www.skidim.com and check out what they have and email them for their advice.
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bud sellers
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davee40 ![]() Senior Member ![]() ![]() Joined: May-22-2009 Location: LAKELAND,FL Status: Offline Points: 249 |
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who carrys a 2 inch spark arrestor , didnt see one at skidim ,getting ready to install edelbrock perfomer manifold and looks like im going to have clearance issues
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davee40
lakeland,fl |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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They are hard to find but are out there. I'm sure someone will chime in with a idea. BTW, Skidim is no longer a supporter of this site so shop elsewhere. There are plenty of good if not better sources out there for parts. "Correct parts"? give them a call. |
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davee40 ![]() Senior Member ![]() ![]() Joined: May-22-2009 Location: LAKELAND,FL Status: Offline Points: 249 |
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didnt know that pete thanks ,i waz wondering if i could just cut down the one i have ?
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davee40
lakeland,fl |
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davee40 ![]() Senior Member ![]() ![]() Joined: May-22-2009 Location: LAKELAND,FL Status: Offline Points: 249 |
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Hey jody chime in your input if you see this
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davee40
lakeland,fl |
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Waterdog ![]() Grand Poobah ![]() ![]() Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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Try Googling E basic power. I got one from them a while back.
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SS 201 ![]() Senior Member ![]() Joined: October-20-2003 Location: United States Status: Offline Points: 232 |
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If you put 1.7 rockers on the intake valves you can gain some more power, leave the exhaust at 1.6 Be sure you have enough clearance, multiply 1.7 x the true valve lift, it will give you the valve lift. With the standard deck clearance there should be no problem.
This way it allows the valve to open sooner and more fuel to come in the cylinder. |
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LaurelLakeSkier ![]() Senior Member ![]() ![]() Joined: February-12-2007 Location: Wisconsin Status: Offline Points: 485 |
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This may be a small detail but the 1.7 rockers shouldn't make any change in when the valves open, that would require a different cam. It will allow them to open up further however. |
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SS 201 ![]() Senior Member ![]() Joined: October-20-2003 Location: United States Status: Offline Points: 232 |
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It does, do the math, done every day. It was suggestion I guess this forum doesn't want to learn, Now I know why I quit posting, never changes.
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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I'd like to see the math on the concept. I'm totally open to learning whatever the result shows however am curious how the rocker ratio will change when the valves open. I would think a cam profile change would be needed as well. BTW, this is a forum of open discussion with different views. I'm sure by now you have run into many different opinions but haven't learned to listen to different opinions. I'm sorry to hear that you will be no longer posting as I do know you have many years of engine experience behind you. Make sure you provide the math before you stop posting!! ![]() EDIT: Doing a preliminary search, I was able to find this. Looks like all the opening and closing points are the same with different ratio rockers. ![]() Maybe more math is needed!! |
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Riley ![]() Grand Poobah ![]() ![]() Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7953 |
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Keep posting SS201. Everyone likes your posts!
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81nautique ![]() Grand Poobah ![]() ![]() Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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Sometimes the way people describe things really doesn't get the point across. Pete's graph shows that the valves don't open any sooner BUT higher ratio rocker arms do in effect change the profile of the cam. You'll see that not only do the valves open to a higher lift but they open "faster" evidenced by the wider curve in the graph, I think this could easily be misinterpreted as opening sooner. Either way you want to call it the advice to install 1.7 rockers is good bang for the buck without having to go with a new cam.
Only question I have is why only on the intake valves? |
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You can’t change the wind but you can adjust your sails
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Only one problem tho,changing 1.7's won't do him any good, he already has them
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LaurelLakeSkier ![]() Senior Member ![]() ![]() Joined: February-12-2007 Location: Wisconsin Status: Offline Points: 485 |
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Your suggestion on using the 1.7 rockers to give a performance boost was a good one. As I said, I was just trying to clear up a small detail in your explanation as to why they worked. I think most of us are on this forum to learn from others..... |
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SS 201 ![]() Senior Member ![]() Joined: October-20-2003 Location: United States Status: Offline Points: 232 |
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Tip
Ask the cam grinder how the cam is ground. ex. some cam grinder use a advance or retard . ex. some are 2-4-degrees advance, some are 2-4 degrees retard. Now Ford uses a 8 degree retard built into the timing gear, suggest to buy a after market timing set to eliminate. When you know the cam specs you can either retard cam, or advance. Retard usually gives 100-200 rpm, advance loses 100-200 however gives more low in torque. Also can got the ratio change that's makes the cam change lift. |
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