I have been getting mixed reviews lately on this. Some say that the monoblade is too big and flows too much air for a dialy driver at lower rpms and lower throttle. Therefore crisp throttle response is gone out the window.

This is a daily driver above all! So, I want great throttle resonse, yet not run out of Throttle body and the top end. I have a 52mm now, and it seems to be my restriction from hitting 440rwhp. So, any experiences please let me know! I want the best, and dont want to have to do this again.

This will go to the track, however very limited. I drive this every day, so I would rather have a great running car rather than just a dyno queen.

Thanks again everyone!
Cody

 

Last I knew on a smaller motor with a monoblade there was an big issue with "Tip-in" (bog off the line), if your daily driving sticking with a 58mm at the largest, my .02 .
Mono blade is 1300 CFM
58 mm is a 1000 CFM if I remember right.
52mm is a 820 CFM
48 is 670??? I think

 

58mm is plenty for 440rwhp.

 

Maybe I am missing something...have you dynoed the car yet...are you sitting at 439 rwhp and nothing you will do will get you over the hump?

How about you dyno it with what you have first and then ask the question.

 

He did dyno it, 422rwhp IIRC.

I had a monoblade on my car and didn't have any tip in issues. I saw about 2-3" vacuum when I had the 52mm unit (6600-7000rpm was the worst) and after the monoblade I never saw higher than .7". I don't have a direct before/after dyno since I put the 9" also between dyno's but I gained 4rwhp after putting the 9" in the car so it was certainly worth it.

Injuneer has posted numbers claiming that a 9" has 3% additional loss over a 10 bolt, so if that is true I gained 3%*409 + 4 or about 16rwhp going from the 52mm to the monoblade.

Cody...check your PM's

 

Wow

 

For a DD I would go with the 58 because it retains the IAC circuit through the intake which I asume has to go with the monoblade. When I bought my BBK 58mm used the blades were opened a tad to get idle air and even with a little 208/221 cam the idle quality dropped from what it had been with the stock TB. I then drilled the IAC bypass like a stocker has that the aftermarkets don't and closed the blades and got my idle quality back. Evebn if it cost me a few HP I would stick with the 58mm just for that in a true driver.

 

hey chris... where you at my dyno day?? lol that is what I dynoed at, 422.6 rwhp, 420.4 rwtq. The top end flatlined for a bit on the hp curve, so I know I need more throttle body. Also, the torque should be higher, but we are thinkin the the tires may have slipped a bit, and the open y pipe was not enough restriction for my motor.

I am worried about the poor low end and idle of the monoblade, that is why I am posting. The monoblade does have the IAC. At least the AS&M one does. Keep this coming!

Chris, I will be calling you shortly!

 

I just recieved my Holley 58MM TB today. Its the most beutiful part of my whole engine. The quality looks excellent. Good thing my car is a garage queen so I can keep this stuff all clean

I wouldnt go with a monoblade if I were you. Even if you were giving up a few HP, it should be much more streetable.

 

Im starting to get that hint here. Being I drive this every day in the summer, I would gladly give up a few HP to be able to not fight the throttle body!

 

I did not mean to question wether it had the IAC but rather wether it's IAC circuit would work with the stock manifold cylinder discribution circuit, you know the little hole between the big bores in the front of the intake.

 

yeah I understand now... You wanted to know about the hump inside the intake. I totally missed that, it was my bad. Right now my intake has it, but from what I understand it has to come out to do the monoblade any good.

 

Were these numbers SAE or STD?

 

SAE. What is the difference anyway?

 

5% is the diff basically between SAE and STD. So 443rwhp STD, which basically gets you where you wanted to be.

Bret