Power levels and motor buildup?s

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Nov 13, 2001 | 07:53 PM

XLR8NSS

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From: Deep in the seedy underworld of Koonerville

Power levels and motor buildup?s

First this is what I have decided on.

- stock cube motor
- stock crank
- probably end up doing forged sbc rods
- 9:1 forged pistons
- heads: stage II,2.02/1.60, they'll bump CR ~.5
- cam?(I want a nice mild cam for an A4)(I have a B1 just sitting around?)
- I'll keep the 3.2" pulley on the ATI blower. I've been told it should show 8# on my stock car with the P1SCH.
- stock 2001 intake
- FLP headers with cats
- cutout in intermediate pipe(I've got an electric cutout plate for just cruising)

Here are my questions

1. Would the B1 cam be alright or should I go with a dedicated blower grind? I'm more concerned with overall driveability then all out power. I don't want to spin the motor to death either.

2. What type of boost loss will I see going from stock to a heads, cam, headers and cutout setup? I know it'll make more power even with less boost I'm just curious how much the boost will drop.

3. Do you think 550RWHP is a realistic goal with this setup?

4. What type of head sealing should I look into? (regular studs, AREs new studs+block, what gaskets) The stuff I listed at the top is all that will be done power wise. That is why I want to know what type of sealing I should look into.

I know some things are kind of vague but just take your best guesses. Let me know if I left anything drastic out. <img src="images/icons/smile.gif" border="0">

Thanks for taking a look. By the way, I posted this on the other board a couple of days ago and didn't get any responses so lets get'em coming. <img src="images/icons/smile.gif" border="0">

XLR8NSS

Nov 13, 2001 | 08:07 PM

guswedy

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From: Hard hittin new britain, CT

Re: Power levels and motor buildup?s

what are the specs on the B1?

Nov 13, 2001 | 08:09 PM

XLR8NSS

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Re: Power levels and motor buildup?s

Here they are:

221/221 .558/.558 114

Nov 13, 2001 | 08:12 PM

guswedy

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From: Hard hittin new britain, CT

Re: Power levels and motor buildup?s

1. i think the B1 cam should be fine as a blower cam. should make nice power at reasonable RPMs.
2. as for boost loss, with a 3.2 pulley and some good flowing heads i would guess it would drop to maybe around 6 or 5psi.
3. as for 550hp with the right fuel system and tuning, i think that should easily be attaniable.
4. i dont know what you would need to do, someone else please help with that

[ November 13, 2001: Message edited by: guswedy ]</p>

Nov 13, 2001 | 08:23 PM

Plum Crazy Rob

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From: Wichita, KS - 1400' above sea level ;-)

Re: Power levels and motor buildup?s

Hi Johnnie! Those JE pistons are certainly nice and will be arriving before you know it <img src="images/icons/wink.gif" border="0"> When do you think you might decide for sure about rods?

1) Need good exhaust and exhaust port work for the B1 with the single pattern. BTW, I had a dedicated 218/230 blower cam in an LT1 A4 car, and that was one of the reasons I got rid of the car! Idled like sh*t! But the extra exhaust duration contributed greatly to that.
2) There are several Vortech heads/cam guys now...
hopefully they'll drop in, or email 'em for boost and pulley size. Something that's not first hand experience is pretty much going to be a guess, sometimes educated, sometimes not
3) 550 RWHP was exactly what I was setting up for @ 8 PSI on the twin turb-o-crapwhatdidtheydowithmymoney...
Is the 0.5 CR bump intentional, or you already
had the heads?
4) Depends on 2) and 3).....Anything serious, and
surely spring for the head gaskets and bolts
at least.

Nov 13, 2001 | 08:47 PM

XLR8NSS

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Re: Power levels and motor buildup?s

Hi Rob

I'm having a real problem deciding on what to do about rods. The stockers seem to be holding up to some big power. I think they'll be fine with the goals I have set but, when your building the motor and its out of the car its very easy to incorporate some forged rods.

If I stay with the stockers that are on the pistons I'll save quite a bit of money. If I go with forged I'll spend ~$500 on the rods and an undetermined amount for a machine shop to machine them to fit on the pistons.

I'm thinking I may just put the forged rod money towards some nice gaskets and studs for the heads.

The CR bump was not intentional. I just happen to have a set of stage II heads sitting here that were for my now deceased N/A 2000 SS. I should be around 9.5:1 with them and a thin gasket. If I go with a thicker gasket I could drop the CR a little. I think with the mild boost I'm planning the 9.5:1 CR will be fine and allow me to keep some "off boost" torque.

I was looking at a mild dual pattern Comp cam also. I want something that idles like stock. Here are the specs. 214/224 .525/.532 114 I was thinking of maybe putting 1.8 rockers on the exhaust valves to help flow on the exhaust side.

Let me know what you think.

Johnnie aka "XLR8NSS"

[ November 13, 2001: Message edited by: XLR8NSS ]</p>

Nov 13, 2001 | 09:49 PM

Plum Crazy Rob

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From: Wichita, KS - 1400' above sea level ;-)

Re: Power levels and motor buildup?s

As far as the rods, you can see what I thought
for a mild, budget drag-race oriented blower motor - they'll come attached to the pistons. Get ARP or Katech bolts <img src="images/icons/wink.gif" border="0"> IMHO, far more Forced Induction people suffer tuning-related engine failures before they ever accumulate enough fatigue on any
engine parts to matter = "Practice shortblock?"

I wonder how the '01 LS6 cam would be for a centrifugal setup? For the twins I was going to
use the stock cam...LOL <img src="images/icons/grin.gif" border="0"> <img src="images/icons/blush.gif" border="0">

Obviously you'll be dealing with a power vs. drivability tradeoff, particularly in an A4....