Maxbore H22/23 TB

[megarock15]

so im moving up from the a6 to the H22/23 IM and im totally getting that TB from omni so Psyched

[fatboy1185]

hence the reason for maxbore

I don't think you understand what I mean. The IM opening is not that large, so boring it out will make the walls paper thin. But give it a shot, maybe it is big enough to handle a 70mm bore.

[steelbluesleepR]

I don't think you understand what I mean. The IM opening is not that large, so boring it out will make the walls paper thin. But give it a shot, maybe it is big enough to handle a 70mm bore.

maxbore will also match the plenum to the throttle body, this is what i'm assuming he's planning on doing if he isnt getting BOTH the (already big) throttle body and plenum bored out and matched.

[fatboy1185]

But are the top and bottom of the plenum big enough to handle the 70mm bore?

[CB7lx91]

Taken from The Third Edition of "Four-Stroke Performance Tuning" by A. Graham Bell...

Table 2.4 Throttle Plate Requirements

Throttle Plate (mm) Maximum Horsepower
50 170
56 210
62 260
70 330
75 380
85 490
90 550
100 675

"Remember when you opt for a larger throttle plate that the car will not be so easy to drive around town. With a smaller throttle body, just cracking open the throttle may have a steady increase in power, but with a big plate a whole lot more air rushes into the engine with just small movements of the accelerator. This may make the car more jerky and wheel spin on wet roads can be a problem."

http://www.amazon.com/Four-Stroke-Pe...7656533&sr=8-1

GL with build.
Andy

[PR CB7]

mines are 65mm TB and plenum....see the runners they are not acurate to the gasket which im not very happy about

gasket matching and opening runners on manifold is a no-no
he knew what he was doing

[megarock15]

gasket matching and opening runners on manifold is a no-no
he knew what he was doing

yeah becauSe when you tighten the manifold down the gasket will lose its shape due to pressure

[steelbluesleepR]

yeah becauSe when you tighten the manifold down the gasket will lose its shape due to pressure

no, its because opening up the manifold too much is detrimental to making power. if it has too much volume, the intake air will lose velocity.

[megarock15]

yes but when you boost you dont really need to worry so much about velocity because of the forced induction but if your running N/A thats very true

[dj_eclipse_303]

gasket matching and opening runners on manifold is a no-no
he knew what he was doing

i was going to have the head portmatch too and build a little but i don't think is gona happen and now i regret having the runners done, i have to find another manifold...pal'carajo!!!!! LOL

[megarock15]

im going to port match my h22 im, but if something goes wrong i will have a backup A6 manifold