sc4dr

His calculations seem on point with every pulley configuration I'ved used on my B18c....4.2, 4.0, 3.8, crv, and stepper combinations.
give or take a little due to engine, and blower setup.

Timmay

i thought stock gsr with crv pulley was 9lbs using the 4.0 nose pulley??

ah expletive im all confused now


anyways.. anyone using a catch can setup???? how are you running it??

TypeRobert

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jaker &raquo;</TD></TR><TR><TD CLASS="quote">When the manifold is under vacuum (light throttle, cruising along), the bypass valve opens, and the blower is just along for the ride, not producing any boost. In this mode, it draws maybe 1 horsepower from the crank. There's no load. The INSTANT, and I mean instant you press on the pedal far enough to get out of vacuum, the valve closes, and since the blower is already spinning at speed, the boost is THERE.

Another advantage to the bypass valve, is it will close partially, depending on the level of vacuum in the manifold, and the engine will make more power that an NA engine at the same throttle opening, because there's a bit of boost going in. It'll still say vacuum on the boost gauge, but it will be less vacuum than an NA engine would have at the same throttle opening. This means I can cruise up a hill/mountain pass on the highway at a much smaller throttle opening than if the motor didn't have the blower. I can stay in closed loop under alot more conditions, saving gas.

I've been running the M45 for about 18 months now, and my gas mileage has been the same or better than when I was NA. </TD></TR></TABLE>

do all JRSC have that bypass valve im interested in the setup lookin aa much info as i can might get one when summer comes

Veris

rmcdaniels how high do you rev your motor?

I did the calcs for your setup and at 8500rpm you are running a blower speed of 16500 rpm. re: 5.9/mvm/3.4

Timmay

ahhhhahah damnit i just want the best way possible to run 9lbs and not to much blower rpm

STREETWERKZ

all these pulley diameters are driving me crazy.


( modifies flywheel to use as a crank pulley and runs 50 PSI )

sc4dr

None of this is exact science...its just close to what it should be.

The bright side is that there are many possibilities

STREETWERKZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sc4dr &raquo;</TD></TR><TR><TD CLASS="quote">None of this is exact science...its just close to what it should be.

The bright side is that there are many possibilities </TD></TR></TABLE>





kinda hard for us D series guys.

Timmay

guessing nobody runs catch cans?

STREETWERKZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Timmay &raquo;</TD></TR><TR><TD CLASS="quote">guessing nobody runs catch cans?</TD></TR></TABLE>

what do you need to know?

I think you should go through the past 3 pages. someone told you how to run a catch can. pretty simple actually.

Timmay

well i was seeing if anybody does them different with the jrsc vs turbo

STREETWERKZ

pretty much most catch can setups are either, two spots in the back of the block....(eliminating PVC) or the 'jdm show cahhh' way of doing it out of the valve cover.

both work.

Timmay

i have the 2 nipple for the block on order

rmcdaniels

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Veris &raquo;</TD></TR><TR><TD CLASS="quote">rmcdaniels how high do you rev your motor?

I did the calcs for your setup and at 8500rpm you are running a blower speed of 16500 rpm. re: 5.9/mvm/3.4
</TD></TR></TABLE>

I usually don't rev it past 8000, there's no need to. It's got such a fat torque curve I can shift a bit early and not lose much. On the dyno we ran it up to 8900 a couple of times just to see what it would do. It kept making power all the way up.

Veris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rmcdaniels &raquo;</TD></TR><TR><TD CLASS="quote">I usually don't rev it past 8000, there's no need to. It's got such a fat torque curve I can shift a bit early and not lose much. On the dyno we ran it up to 8900 a couple of times just to see what it would do. It kept making power all the way up. </TD></TR></TABLE>

Cool. Just thought I'd let you know what your blower speed was. Did you have any slippage issues?

I'm piecing together a 'similar', but smaller displacement setup right now.

85mm GSR - 1979cc
ENDYN Ported M62
ENDYN roller wave pistons (CR~10.2:1)
LHT Intercooler (just sent John my manifold)
03/04 Cobra Heat Exchanger & Reservoir
Kamikaze Header & 2.5" exhaust
b16a camshafts (with ITR exhaust if I can find one)
Endyn stepper pulley
3.8" blower pulley
LS crank pulley (6.2" I think, still looking for confirmation)
Blower speed should top out around 15,500.

I'm hoping for 10psi after the intercooler and 280+whp.

rmcdaniels

No slippage with the 3.4" pulley, but I'm going to try a 3.2" pulley on it tomorrow and see what happens.

BiG Chris

how much will that gain from the 3.4 to the 3.2 pulley?

rmcdaniels

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BiG Chris &raquo;</TD></TR><TR><TD CLASS="quote">how much will that gain from the 3.4 to the 3.2 pulley?</TD></TR></TABLE>

There's only one way to find out.

Timmay

im getting pretty close to getting my setup done
waiting on my header to arrive.. still need a 3.8 pulley, fuel pump and boost gauge

Gojira D.O.T

3.8 pulley on ebay

elpiar

Can I run transmission cooler for the LHT intercooler? Maybe put two small ones in the bumper just like FMIC?

rmcdaniels

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elpiar &raquo;</TD></TR><TR><TD CLASS="quote">Can I run transmission cooler for the LHT intercooler? Maybe put two small ones in the bumper just like FMIC?
</TD></TR></TABLE>

You can, but the results may suck. You want to have a significant cooling surface and a good volume of water for your water/air intercooler system. Mine holds almost a gallon, but I'd like to have more, while with a half-width radiator my cooling surface is probably sufficient. One day I'll relocate my battery to the trunk and build a custom reservoir in that space. that will also help with bleeding the system as my reservoir is not currently the highest point in my system. I've seen high-end transmission/oil coolers used successfully, but they cost more than a radiator at that point and don't work as well. I've tried using the cheap transmission cooler cores and they hold so little water and cool so little that the system gets heat soaked pretty quickly.

Veris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rmcdaniels &raquo;</TD></TR><TR><TD CLASS="quote">

There's only one way to find out.</TD></TR></TABLE>

My calculator say 1.2 psi, 3.4 to 3.2 but it doesn't work well with your setup. It suggests 10.5psi and as I recall you are making ~8psi. Are still running that RMF narrow primary header?

BTW with a 3.2 pulley you'll be spinning the blower 16500 at 8000 & 17500 at 8500.
If you take it all the way to 8900 it'll be at 18400.

rmcdaniels

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Veris &raquo;</TD></TR><TR><TD CLASS="quote">

My calculator say 1.2 psi, 3.4 to 3.2 but it doesn't work well with your setup. It suggests 10.5psi and as I recall you are making ~8psi. Are still running that RMF narrow primary header?

BTW with a 3.2 pulley you'll be spinning the blower 16500 at 8000 & 17500 at 8500.
If you take it all the way to 8900 it'll be at 18400.

</TD></TR></TABLE>

The RMF header is still on it, but my new header is ready, just have to get the head back on the car and get it to the shop to have the new one fitted on the car.

The boost is actually up to 9-10 PSI since I switched to the Crower turbo cams from GSR cams. I'll also be putting the head back on the car with a thinner head gasket (.030 vice .040), so hopefully I can run 10 PSI consistently and make somewhere around 325-350 WHP with it.

Veris

Glad to hear that cause I couldn't figure out why the calculator didn't work for your set up.