Many companies offer 56, 59, 60, 62, and even as high as 65mm. So which would you all recommend with the combination of a GM S/C?
Curious to know what is the size of the opening of the S/C too?
Lastly, where did you people bought yours?

Thanks




>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

The bigger the better. If you go bigger than a 62mm, you'll have to port the end of the s/c to match the TB.


<a href="http://www.j-body.org/members/mrpute"><img src="http://www.j-bom.com/images/sigs/putesig.jpg">

i originally heard a long time ago that the s/c inlet is 60 mm. others have claimed 62. since [i think] it was 60, i bought a 59 locally. plus, it would work on the stock manifold until i bought the s/c (cuz some say the 62 hits the intake manifold opening).

i have had no problems with the rsm 59, including idle and just everything.



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- Sold my beloved J in April 2010 -

im using a 59mm on mine currently


ive run the best of a 14.52 @ 94 in my cav , with a auto trans

62mm(rsm) here and loving it.

Thanks people.
RSM does not make a 59mm anymore right?
Also by going 62-65mm don't you think you will be stifling air velocity? I think by having that size you loose bottom end-torque but gain in high HP. Correct me if I am wrong.



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

get the 62mm and be done with it. You have a s/c. why are you worried about torque?

i have an rsm 62mm tb for sale

listening.....


___________________________
MAKING MY DREAMS A REALITY
Visit my cardomain site !!!

ELIOT. Now.....boosted.

Pending on how much boost you are running is how I would match a T/B. If you are planning on 8lbs and higher deff a 62mm. Lower boost a 56 or 59 would be fine. WIth the M62 kit and 15 lbs we are gonna be running a 75mm LS1 t/b on Blacks Z24


2002 Z28: Slp coldair Pac, Corsa Catback, 3200 stall

im running STOCK PULLEY and hitting 6psi even when its hot as hell out and now its cold and im seeing like 6.5psi with the 59mm t/b.

RSM 62mm here...loving it



Portage, MI

jsunfireGT2000 wrote:im running STOCK PULLEY and hitting 6psi even when its hot as hell out and now its cold and im seeing like 6.5psi with the 59mm t/b.

you know, you post this in every post thats even remotely related to psi or pullies. have you ever thought that perhaps your boost gauge is off?

try a different gauge and see if you get the same results. if you do, props to u.



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- Sold my beloved J in April 2010 -

Mr. Pute wrote:The bigger the better. If you go bigger than a 62mm, you'll have to port the end of the s/c to match the TB.

I agree 100%. But i believe the RSM 62mm throttle body actually only measures 60.5mm which is the same size as the blower inlet.


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.

..mine would hit 6 some times.... but right at red line.

Chris


'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Skilz10179 wrote:

Mr. Pute wrote:The bigger the better. If you go bigger than a 62mm, you'll have to port the end of the s/c to match the TB.

I agree 100%. But i believe the RSM 62mm throttle body actually only measures 60.5mm which is the same size as the blower inlet.

Yep mine was just a hair over that when I measured it.

Ya I measured it and it is exactly 60mm, I can attest.

But you guys brought up something interesting, the 62mm TB is really 60.5 mm.
Can someone really confirm that (maybe with a pic too)? Or was that just a isolated incident, because RSM clearly states "62mm."

Also the 59mm one is no longer made, correct?

Thanks for the input people.



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

(!) Info on this^^



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

I have the RSM 62mm, but have never measured it with a micrometer to verify it's actual size. I did notice that there is a small lip on the blower inlet that is visible through the TB opening. When I yank the S/C out to change my alternator, I'll probably machine that lip off.

With this TB and the 2.7" pulley, I've touched 8psi on a couple of occasions.




14.330 @ 96.37mph

I have a RACETECH "62mm" TB....

Measured it's actually 62.8 mm.... not some BS 60mm crap.

I've been saying this for almost 3 years, nobody listens.

If you want a true 62mm + TB.... Racetech sells 'em.

The bigger the better for boost!

-Chris-




-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...