Thinking About Monoblade

Beercules

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My question ( that i think Bimini answered) is: can you have too large of a throttle body? It seems to me you'd get more power by force feeding the blower inlet with a higher velocity flow than with a lethargic wide open area for the blower to sip from when it feels like.
 

paluka21

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My question ( that i think Bimini answered) is: can you have too large of a throttle body? It seems to me you'd get more power by force feeding the blower inlet with a higher velocity flow than with a lethargic wide open area for the blower to sip from when it feels like.

Freeing up any restriction and allowing more linear air flow before the supercharger will make more power without a doubt. I believe part of the reasoning why folks don't go with the largest cold air intakes and throttle bodies when running lower boost is because of drivability concerns. My second inclination would be because the larger CAI and throttle body can negatively affect power output down low in the rpm curve when running lower boost, but would still increase more in the upper rpms.
Someone please feel free to correct me if I'm wrong.
 

Catmonkey

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Yes and no. There comes a point of diminishing returns when big is big enough and larger won't gain you much. Not to mention camshaft selection is going to dictate just how much air the engine can use. Same goes for how much boost you can run. But realize the bigger the throttle body, the more it's going to fell like an on off switch. The throttle body reacts in terms of angles. With the large throttle bodies, you could be flowing as much air at a 45* opening as the stock throttle body at 90*. Now that's a consideration, for me anyway, on the street. On the track it doesn't make a whole lot of difference. It sort of depends how you use your car and how finicky you want it to be. I've had my share of temperamental rides in my lifetime. A lot of people contend it's in the tune. Sure, you can tune some of it out, but look at my comment at angles, the motor reaction is linear.

Here's a pic of my supercharger inlet ported for the big Whipple eliptical. Is it overkill? Absolutely! My street TB is the 72mm twin. When I go mile racing, I can swap out the twin for the eliptical. The adapter plate is the same dimension as the throttle opening in the throttle body. Certainly something a little smaller would probably make as much power, but the eliptical curvature won't move quite as much air at lower speeds (angles) as the conventional monoblade shape of the same size.

G2%20Inlet_zpsx8z4bjtj.jpg


Really, I don't care what throttle body you buy. I just hate seeing people buy parts twice.
 

GT Premi

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My question ( that i think Bimini answered) is: can you have too large of a throttle body? It seems to me you'd get more power by force feeding the blower inlet with a higher velocity flow than with a lethargic wide open area for the blower to sip from when it feels like.

That's not how it works in this case. With a blower, you have a high pressure side (outlet) and a low pressure side (inlet). There's nothing forcing air through the inlet, so "choking" off the inlet side will only serve to starve the blower. You WANT the blower to be able to "sip" from the low pressure side as it sees fit to be able to make the power it needs to make.
 

Jam421

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Ben99GT....I saw the same thread . Direct swap VMP 72 to SCJ mono and the dyno graph showed the results of 9/11 mono over twin after required TB calibrations. I figured they'd both pull over the 65's/67's but that was a 1:1 comparison. I orderd the SCJ mono from FRPP . Install/tune is scheduled for April 11th. I hope to see a gain over my VMP Twin 67 which was a rock solid, bee steady terrific pulling TB !
But ..it's time for an upgrade...if it pulls 1-1.5 lb extra boost & a HP gain I'd be very happy. Will post results .

Thanks Fellas.
 
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biminiLX

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The difference is greater than 8 at the start of the pull and after peak.
Not doubting the SCJ made more, but Really need to make several pulls with each. A single pull, then swapping and making another single pull leaves variables to me. When I tested a ported/welded Trinity on my car, I made 3 pulls with each and then compared best of both.
When you're talking 700+rwhp, it's hard to compare small gains within the variation error of the dyno.
I have pics of the BPS twin 73 I will try and post tomorrow and there are some nice airflow trick. Likely it'd be hard to make a much more with an SCJ.
Now the KB 168/Whipple 170 I can see, and as we stated already, the single ovals usually flow more than twin.
The question is really you're definition of driveability compromise and the tuners ability. There's a reason most all OEM run twin bore TBs.
I took off my twin 73 for the biggest oval I could fit, but I was looking for performance over comfort :)
Either way, nice to have choices.
-J
 

biminiLX

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Ben99GT....I saw the same thread . Direct swap VMP 72 to SCJ mono and the dyno graph showed the results of 9/11 mono over twin after required TB calibrations. I figured they'd both pull over the 65's/67's but that was a 1:1 comparison. I orderd the SCJ mono from FRPP . Install/tune is scheduled for April 11th. I hope to see a gain over my VMP Twin 67 which was a rock solid, bee steady terrific pulling TB !
But ..it's time for an upgrade...if it pulls 1-1.5 lb extra boost & a HP gain I'd be very happy. Will post results .

Thanks Fellas.
It'll be a nice gain over the VMP 67, good luck with it and keep us posted!
-J
 

Jam421

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Finally folks the FRPP Monoblade is going on my car this Tuesday. The shop will do a base pull with the VMP 67 twin... then on goes the Mono. They are telling me tuning could take a 2-3 pulls...or might be quite a while longer ?
The Mustang shop is very reputable so I have faith they will get it dialed in fairly quick. Based on what I've read here this should not be a tuner challenge.
 

Jam421

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Alibi......I'm not a canned tune guy even after the VMP Stage 4 bolt ons.
I'm not knockin them but I picked up BIG in one afternoon on a shop dyno.
There's 2 Mustang performance shops by me. One is a Dynojet but the shop I'm using for this mod has a Mustang dyno. My only hope is he " becomes one with the mono blade" :)->) !
 

07 Black Beauty

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I went from the cj to the scj and regret it. The CJ rode like stock and the scj does nothing but surge and give me headaches.[/QUOTE

It could be a defect in the TB. I had similar issues w/ mine, no matter what my tuner did he couldn't get it right. I ended up sending it to Accufab, they fixed it @ no cost and it's been perfect since.
 

FORDMAN GT500

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I did not realize L&M was still in business ! My buddy's old L&M failed last year which he replaced for the CJ65mm. Catmonkeys info about the twin 71mm (1755cfm) makes me think about contacting L&M as the steadiness of the twin + cfm makes sense. Currently I'm running a port matched BPS elbow so matching that to a new TB is an easy option. Yikes.....I was thinking one or the other. I'm making my decision this coming week but now ...so much to think about ! But that's a good thing :)->) !
99Vert.........Luvin your candy apple red vert ...I've got the same combo!
PM sent.

L&M is no longer around making throttle bodies
 

FORDMAN GT500

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I highly recommend the Whipple 170mm Elliptical over the CJ mono any day. I love mine . It flows the most out of any standard bolt pattern throttle body going PERIOD . Only a old unicorn L&M twin 78 or a 168 mono KB flows more.They have different bolt spacing than standard
 

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