types1967

i do believe that we could safely run 6psi but anymore then that your asking for major trouble since our compression ratio is too hig at 10.5-1.well what does everyone else think about the effects going over 6psi and how much power would the gain be going from the stock pulley at 4.5 and heading to 6psi.i know we have to pull timing thats why were getting the chip and intercooler but at what point does the efficiency of the blower start to degrade?

Smitty

7-7.5

Smitty

ModAddict

With 93 octane, you can run the 6# pulley on stock tuning, but you should keep an eye on your fuel pressure. You may want to go to the next size up for the blower belt, p.n. 4040252. My guess on HP gain would be 15-25 across the board. I think you'll be amazed with the difference on the butt-dyno.

The blower will max out at about 7.5 psi on our engine, which is still not a realatively high amount of boost. It's not only how much boost will max it out, but also the RPM we can spin the blower. Working from there, we end up at about 7.5 psi for the "Max" boost pulley. It is yet to be seen whether we can run the Max pulley, on stock tuning, with an IC.

The chip, and IC, should still be valuable modifications, even at 6 psi.

sonor kid

Tool462 is boosting 10-11 lbs under full throttle with his 01 Acccord. His dyno is currently 259hp/236 torque. This is done with a custom made high boost pulley.
He polished the internals of his upper and lower plenum, installed 370cc injectors and CL-S cams. He uses his V-TEC controller to adjust the fuel up to I believe 5500 RPM's. The injectors keep him from getting lean above that.

ModAddict

How long has he been doing this for. I wonder if he knows what rpm he's spinning the blower up to and what temp his intake charge is. I assume he's using the Comptech SC kit. The pulley is the easy part,....keeping the blower and engine running long term is the trick.

allmotor_2000

I think if I had installed the AIC (Additional Injector Controller) on my car, I could have boosted 8psi on the turbo kit... probably 400whp - unfortunately timing might have been an issue, in which case if Hondata would FINALLY DO SOMETHING ABOUT US!!

Doom878

Yes he has the Comptech kit. I didn't know Accords had options on blowers.

Remember he has extrude honing to his head done as well to yield such a high figure.

AK_MOBBER

impressive

types1967

well we will see what long term effects are by raising boost levels.i still think we need forged pistons since are cast pistons arent that strong.i would lower the cr and then up the boost to 7.5max

civic4982

what's teh diff b/t allmotor's turbo pressure and the supercharger pressure... don't they act differently somehow? or will 8PSI on a turbo be the same as 8PSI on a supercharger?

Nashua_Night_Hawk

same!

ModAddict

We're tapped at 7-8 psi because of the blower's limitations. Turbos and centrifical superchargers can run twice that. Does the '01 Accord V-6 have a lower compression ratio? That by itself will allow you to run higher boost. And yes, at some point you will want the internals reworked, but at 7-8 we're probably ok, as long as we cool the intake charge or re-map the timing curve.

Extrude honing,...do they remove material in the cobustion chamber of the cylinder head to lower the compression ratio further?

ModAddict

I assumed it was a comptech kit, but someone could always put together a custom turbo or SC kit together. A Vortec kit would be . If his compression ratio is lowered enough, his motor could be fine, but the blower does have an acceptable rpm limit.

ChadT

One thing is that you won't lose horsepower turning a turbo. Not much anyway but it will increase backpressure some. Also with a turbo you can regulate the boost at different rpms. I had a chip in my Audi that would allow the boost to spike to 24psi . Then it would back down in the upper revs to prevent too much heat from being built up. That car had 9.8:1 compression. I guess those old 5 cyls are pretty stout.

allmotor_2000

Boost is boost... its an absolute value whether the car is turbocharged or supercharged. However, other factors such as the temperature of the intake-charge, power-sapping from the motor (S/C is belt-driven), exhaust back-pressure, timing, fuel etc. affect horsepower gains.

r10apple

These pullies for the Comptech s/c: Are you guys getting them somewhere else or is Comptech actually providing different pullies per your specifications???

allmotor_2000

I believe Comptech provides the pulley but does not warrant the kit from that point onwards. I suppose they feel if you want to use the higher-boost pulley, you have to take care of the fuel requirements - contact Comptech if you are unsure... this is what I have gathered about this so far.

Smitty

PULLEY... not pullies... there is 1 and it is a 6 lb C/T boost pulley.
The mother pulley that Modaddict (Brad) is working is a custom fab job..for 7-7.5 LB (?)

and yes you might need to bump the FPR, so a fuel pressure gauge is needed to make sure you have 20 inHG vaccum you should see between 35 – 40 PSI.

And yes as soon as you upgrade the boost pulley your BLOWER warranty is VOID...and from my understanding over the past 10 yrs, they had 1 blower fail, but not from an upgraded pulley.

Comptech blew a motor during there R&D of the pulley...I don't know the specifics.. but it had to do with pushing for more BOOST.

Smitty

r10apple

The grammatical use of "pullies" is proper when one reads several posts, and obviously, there were references to more than one (a 6 and at least a 7 or 7.5)--whether they were custom or not. But thank you anyway!

Have any others upgraded the pulley yet or plan to?
I have a TL-S and just want more power, but I wouldn't switch off to another pulley right away. I'm just curious as to options for doing so...Any word on when the Comptech piggyback for the auto will be complete?
I keep calling them but they are all over the map with info. They have a new catback exhaust that I've had info on for two months now and they still don't have a price or sell date on it either...They keep saying September for each, as of late anyway...

Smitty

Your Welcome nOObie.... I just want it to be clear, since your not the only one that READS these forums...:P

types1967

haha smitty you just got sent to school lol lol :wackit: :wackit: :wackit: :wackit: :wackit: :flamer: :flamer: :flamer: :bubbarubb :bubbarubb :bubbarubb :devil: :devil:

civic4982

ok thanks for e answer guys.... I'll take it that they're exactly the same...

r10apple

Acceptance makes me feel all warm and fuzzy...

Doom878

The Accord V6 has a 9.4:1 compression ratio.

I don't think extrude honing affects comp. ratio. I know what they do is get this clay material to run through the head to remove material. I can find his explanation of it should anyone want more info.

ModAddict

When I purchased the kit from Dean, I was told that with the higher octane available out east, a higher boost pulley might be ok. I told him that with my on board wideband set-up, I could keep an accurate eye on the AFR. He commited to send me one, from Comptech, as soon as he could. He did not mention it would void the blower warranty. If I put a different, non-Comptech pulley, on to run even higher boost, I would not expect any warranty coverage if a problem came up.

Dean, maybe you can clarify the Comptech supplied 6# pulley as it relates to the Comptech warranty for us so we know for sure. I wonder what the installing Acura dealers would think about the 6# pulley.

As far as I know, Scalbert and myself are the only ones that have the 6# pulley so far, but there will be a few more very soon. I am running extremely rich, but will not try to adjust it until after I install headers. As far as the 7.5 psi pulley goes, it is intended to be used with an intercooler, or modified timing map, or both. It will also keep the rpm of the blower within the suggested range.

ModAddict

Increasing intake, or exhaust flow, in theory, will lower boost numbers. The 9:4 CR is why he is able to run higher boost. He may actually get more HP running a slightly lower psi due to the efficiency of thre blower.

ModAddict

ModAddict

I'd like to contact Tool462. Can you tell me what forum I might find him at?

Doom878

He's at www.v6p.net. Check the Forced Induction, 1/4 mile, 1/4 mile timeslips, and dyno sections. If you register Doom878 sent you.

Smitty

I did?...... are you still Eric

types1967

hey noobie i was drunk when i backed you up so consider yourself lucky since your still in diapers!!!!!!!!!!!!

DeansblackCLS

ModAddict,

Yes, the upgraded pulley does void the warranty on the Comptech blower unit. As Smitty stated though, they have not had any of them fail with the upgraded pulleys, though.

Comptech is very comfortable with the kit in the stock configuration and does not want to take any chances with increased boost. They will offer the upgrade, but with the understanding that the warranty on the blower is no longer valid as it is pushing more than they were originally comfortable with. The pulley upgrade may not pass SMOG, either.

Dean

ModAddict

Thanks Dean. You probably told me before, and it went in one ear, and out the other. I guess I'll take it off.

Can you give us any idea what form/function the piggy-back might be taking?

r10apple

Yeah, when is the piggyback coming out? I've been holding off as I don't want to be screwing with this too much. I just wanna install and roll, but I'd like to at least get a bit more than 40hp (TL-S auto) for my $4k...

types1967: I stay drunk a lot, so I'm still gonna take all this as nothing but love. Kinda like what you see from Tom2--it's just tough love--the best kind!

tool462

Modaddict , feel free to pm me and Ill give you my # and we can talk.

I am running the Cl high boost pulley from comptech, at first it provided boost levels of 7.5 peak and 5 at 50% throttle.

After www.extrudehone.com my upper plenum it raised my boost to 9 peak. Later I extrude honed my lower plenum and the boost jumped to 11 psi peak . I am having some serious fuel issues, way too rich under normal driving conditions and detination at wot. I have since installed 370cc www.rceng.com injectors and it seemed to solve the detonation but now it is running fat as hell, it literally smokes when i get on it.
I did NOT expect that the extrude honing would raise my boost levels this high but Im not complaining.
Im hoping that this chip that you guys are talking about can help me, but I will just have to wait and see. Im going tomorrow to try and re tunemy vafc to see if that will help. I will keep u guys posted.

Later - Andy

tool462

everybody needs to remember that my car is NOT a daily driver and can sit in my garage for weeks at a time so that I can iron out my issues. If it was driven daily , I doubt that I would be experimenting half as much as I do.

ModAddict

Andy, Thanks for jumping in. I wanted to look you up to see who made the larger pulley for you. It sounds like you've got what we've been refering to the 6# pulley, or does Comtech have one even larger? I've got two different people looking at making a larger one to take it to 7.5 psi. If Comptech already has this then I won't waste any more time on it. My 6# pulley measures 3 3/8" at the larger flange on the outside of the pulley. Can you measure yours when you get a minute?

Thanks, Brad

ModAddict

Hey Andy, is your UR S/C pulley an overdrive or stock size?

tool462

My pulley measures 3 3/8" , this pulley gives the Accord 7.5#s of boost. the UR crank pulley is stock diameter but lightened. The ps side of the crank pulley is underdriven.