Nitrous plate for cloverleaf manifolds?
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
Nitrous plate for cloverleaf manifolds?
I've been looking for a nitrous plate that is designed for cloverleaf style intake manifolds (like Super Victor 2970) and haven't found any company that makes such nitrous plate.. Is my only option to go with a fogger instead of a plate or is there a manufactorer that makes a nitrous plate for cloverleaf intakes?
Drifting
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From: Puyallup WA
I installed a NOS Double Cross plate on my Dart Single 4 spider intake manifold that had a rather large cloverleaf.
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
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Joined: Jul 2001
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
I installed a NOS Double Cross plate on my Dart Single 4 spider intake manifold that had a rather large cloverleaf.
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
Well, grinding down the intake will cost me HP running naturally aspirated.. It can cost me as much as 20 HP if I grind down the cloverleaf pattern...
Safety Car
Joined: Aug 2001
Posts: 3,892
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
I installed a NOS Double Cross plate on my Dart Single 4 spider intake manifold that had a rather large cloverleaf.
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
The cloverleaf design prevented some of the nitrous holes in the spray bar from spraying properly so I just pulled out the grinder and aluminum burr and went to work. I ground the aluminum back until there was no interference.
I also did the same thing on the Dart intake for my 542" motor that I ran back in 2003. I did before and after DynoJet runs on that car and grinding back the cloverleaf cost ZERO horsepower while running without nitrous.
Steve
Oliver, I think you are too caught up in this clover leaf intake being something special....it is not. For your combination I seriously doubt it would cost you any power to have the entire thing ground out; you might even gain a little. Your motor is a large cu in. high rpm motor that needs a large plenum, it might benefit from removing the clover leaf. Either way, I would run the Fogger (like I have said a million times
) If not, ground out the intake like Steve did and call it good. Ever notice how the majority of racing intakes do not have a clover leaf design?
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
If I were stuck running a plate that is what I would do also.
Oliver, I think you are too caught up in this clover leaf intake being something special....it is not. For your combination I seriously doubt it would cost you any power to have the entire thing ground out; you might even gain a little. Your motor is a large cu in. high rpm motor that needs a large plenum, it might benefit from removing the clover leaf. Either way, I would run the Fogger (like I have said a million times ) If not, ground out the intake like Steve did and call it good. Ever notice how the majority of racing intakes do not have a clover leaf design?
Oliver, I think you are too caught up in this clover leaf intake being something special....it is not. For your combination I seriously doubt it would cost you any power to have the entire thing ground out; you might even gain a little. Your motor is a large cu in. high rpm motor that needs a large plenum, it might benefit from removing the clover leaf. Either way, I would run the Fogger (like I have said a million times
) If not, ground out the intake like Steve did and call it good. Ever notice how the majority of racing intakes do not have a clover leaf design?I'm pretty sure that I'll go with a fogger system.. They sell fogger plumbing kits without the bottle, so I could use my entire electric setup but just change to fogger components...
Safety Car
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
The best performing small block intakes for 4500 series carbs (Dominators) do have the cloverleaf pattern... In independent dyno tests of small block manifolds for 4500 series carbs, the top intakes all had the cloverleaf pattern. My engine builder also said that it would definetely cost me over 10 HP if I'd have the cloverleaf pattern ground down.. It would help me with the nitrous but would hurt me naturally aspirated..
I'm pretty sure that I'll go with a fogger system.. They sell fogger plumbing kits without the bottle, so I could use my entire electric setup but just change to fogger components...
I'm pretty sure that I'll go with a fogger system.. They sell fogger plumbing kits without the bottle, so I could use my entire electric setup but just change to fogger components...
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
I meant the pattern to be ground down, not the intake height.. The cloverleaf patter does make power even though I really don't understand why.. I'll let you know when I'm ready for a fogger.. That's the way I'm very likely going to go... but it'll be a couple of months until I got the car legal to 8's and 9's..
Safety Car
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
I meant the pattern to be ground down, not the intake height.. The cloverleaf patter does make power even though I really don't understand why.. I'll let you know when I'm ready for a fogger.. That's the way I'm very likely going to go... but it'll be a couple of months until I got the car legal to 8's and 9's..
Every motor is different and you can not simply say it will make XX power without testing.
Let me know when you are ready for the Fogger and I will go over to Nitrous Supply and make sure you get taken care of. There will be no need to buy a kit, we will just plumb the intake and run the lines and nozzles, that is all you will have to pay for. Maybe I can get you a few sets of jets also.......I'll make sure we have 46's in it when you get it Ha Ha......little nitrous joke for you Oliver.
Last edited by 69 N.O.X. RATT; Mar 9, 2007 at 09:29 AM.
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Thread Starter
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Joined: Jul 2001
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
I can see how the cloverleaf reduces the effective area of the plenum, and on SOME motor combinations that would improve the signal the carb sees and make more power. On your motor however, I would be willing to bet that due to the size and rpm range of the engine it would benefit from removing the cloverleaf and thereby increasing the size of the plenum.
Every motor is different and you can not simply say it will make XX power without testing.
Let me know when you are ready for the Fogger and I will go over to Nitrous Supply and make sure you get taken care of. There will be no need to buy a kit, we will just plumb the intake and run the lines and nozzles, that is all you will have to pay for. Maybe I can get you a few sets of jets also.......I'll make sure we have 46's in it when you get it Ha Ha......little nitrous joke for you Oliver.
Every motor is different and you can not simply say it will make XX power without testing.
Let me know when you are ready for the Fogger and I will go over to Nitrous Supply and make sure you get taken care of. There will be no need to buy a kit, we will just plumb the intake and run the lines and nozzles, that is all you will have to pay for. Maybe I can get you a few sets of jets also.......I'll make sure we have 46's in it when you get it Ha Ha......little nitrous joke for you Oliver.
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Oliver...think of the cloverleaf as being almost a 4 hole spacer...it lengthens the carb runners somewhat. So what ahppens when you stick a 1" spacer on top of it? Doesn't seem like good airflow really.
Most folks cut them out when going to the juice...and as Steve mentioned..didn't lose or gain anything either way. I think you might need a little more plenum anyway.
JIM
Most folks cut them out when going to the juice...and as Steve mentioned..didn't lose or gain anything either way. I think you might need a little more plenum anyway.
JIM
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
Oliver...think of the cloverleaf as being almost a 4 hole spacer...it lengthens the carb runners somewhat. So what ahppens when you stick a 1" spacer on top of it? Doesn't seem like good airflow really.
Most folks cut them out when going to the juice...and as Steve mentioned..didn't lose or gain anything either way. I think you might need a little more plenum anyway.
JIM
Most folks cut them out when going to the juice...and as Steve mentioned..didn't lose or gain anything either way. I think you might need a little more plenum anyway.
JIM
Safety Car
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
According to 2 engine builders that I know, grinding down the cloverleaf pattern will reduce naturally aspirated power by as much as 20 HP.. I wonder if anybody sells the spray bar by itself without the plate.. I've seen people drilling holes into their intake and running the spray bar through those holes. If I could get the spray bar by itself, I'd just get a 1 inch cloverleaf spacer and drill holes for the bar and run it sideways so that all the spray bar holes are exposed.. However, I don't know if the spray bars are available separately...
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From: Millington Illinois
St. Jude Donor '08-'09
According to 2 engine builders that I know, grinding down the cloverleaf pattern will reduce naturally aspirated power by as much as 20 HP.. I wonder if anybody sells the spray bar by itself without the plate.. I've seen people drilling holes into their intake and running the spray bar through those holes. If I could get the spray bar by itself, I'd just get a 1 inch cloverleaf spacer and drill holes for the bar and run it sideways so that all the spray bar holes are exposed.. However, I don't know if the spray bars are available separately...
Safety Car
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
10,000 rpm, don't see their stuff around much anymore. I met the guy that started the company.....he is no fan of Mike Thermos. Thermos told me one time the first time he saw a 10,000 rpm plate he thought it was a piece of junk and figured he could improve on the design and sell it..........I guess he was right.
When you stack spray bars like that you need to be very careful they are square and level; also be sure the nitrous is on top !
When you stack spray bars like that you need to be very careful they are square and level; also be sure the nitrous is on top !
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
great! I'll call them about that soon.. I wouldn't drill the intake but I'd drill a cloverleaf spacer and epoxy the spray bars into place.. That would save me tons of money as I could re-use the rest of my nitrous system..
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From: Lakeland, FL
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St. Jude Donor '03, '06, '17
Mine is made this way. The spray bars are stacked. The bottom bar sprays fuel horizontally and the upper bars spray nitrous at a 45 degree angle down into the fuel stream to atomize the mix. All the holes are stacked and they feed from opposite ends. I think Norval used to make these before they were available commercially
setup!
