Help me get from 525 to 600rwhp!!!

dg98gt · 10-01-2009, 01:00 PM

Here is the current setup:

525rwhp @ 6300, 453rwtq @ 5000
13-14psi (going off gauge because not logged), 11.8 A/F ratio, 19-degrees timing

Built Shortblock:
’99 4.6L truck block (stock bore), 17cc CP pistons, Manley H-beams, Mark VIII crank, fegeral mogul bearings, cobra oil pump and pickup tube, canton windage tray and 7qt. oil pan, ARP head and main studs, stock gaskets. (approx. 8.9:1 compression because of head chamber work)

Heads/Cams/Intake:
2001 heads that were ported/polished (don’t know flow #’s), swirl dams removed, MPH blower cams, 2001 intake with 75mm Dragon Plenum and Throttle Body

Exhaust:
FMS shorty header, MAC Prochamber h-pipe, MAC 2 ½” catback

Power Adder:
Vortech V1 S-trim with AFM 4” powerpipe, MPH Intercooler, SCT BA2800 MAF, Vortech Mini-Race bypass, 2.85” pulley, 8-rib setup, stock crank pulley,

Fuel System:
16-gallon plastic fuel cell mounted in trunk, -10AN lines to A1000 pump, 100-micron filter before and 10-micron filter after the pump, -8AN lines to XMP fuel rails, 60lb injectors, -8AN lines to Paxton boost sensitive adjustable fuel pressure regulator, -6AN lines to return.

Ignition:
TR-6 plugs gapped at .032”, FMS plug wires, MSD coil packs.

Misc:
3.73’s, EGR Delete

My goal is 600rwhp. No methanol injection, no Nitrous, no switching to turbo’s, etc. No electric water pumps, different heads, etc. I know I will have to overspin the blower to get there. I have seen a few s-trim guys do it, so here is my thinking:

Innovators West 10% OD crank pulley (7.5”)………20rwhp
LongTubes with shorty midpipe (MAC, BBK, etc)…25rwhp
Intake Manifold (logan, rr, bullit, etc.)………………30rwhp

Maybe these are way off…….I’m just throwing something out there. With those guesstimates, I should be right at 600rwhp. I would like to maximize the s-trim setup before upgrading to an SI, T, JT, or YSI head unit.

I want to do each of these mods individually and dyno to see where the gains came from. This won't happen overnight!

Are this rwhp estimates close for my setup? Any other ideas out there?

Thanks,
Derrick

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945LSTANG · 10-01-2009, 01:15 PM

moar boost!

14 psi is still pretty mild.

dg98gt · 10-01-2009, 02:09 PM

They only way to run more boost is to either:
A) smaller supercharger pulley
B) larger crank pulley

I can go up to a 10% OD crank pulley without going to an electric w/p. I can go with a 2.70" vortech pulley, but I am a little worried about belt slip, and of course I will be overspinning the blower by 10,000rpm with a 7.5" crank pulley! I think I will save that pulley for a T-trim or YSI.

Derrick

lizzyfan · 10-01-2009, 02:27 PM

Yea, your best bet is to up the boost. Do the T trim upgrade and the 10% overdrive crank pulley. If you use a Gates belt you should be good to go in the way of no slippage.

03GeeTee · 10-01-2009, 02:41 PM

If you don't mind me asking, how much did u spend on your shortblock? Im trying to put one together somewhat on the cheap

sxynerd · 10-01-2009, 03:57 PM

Quote:

Originally Posted by lizzyfan

Yea, your best bet is to up the boost. Do the T trim upgrade and the 10% overdrive crank pulley. If you use a Gates belt you should be good to go in the way of no slippage.

+1

My boost went up 3lbs with the 10% OD IW. Upgrade to the T trim and keep the pulley you have now. Check what you've gained, then go from there.

dg98gt · 10-01-2009, 04:06 PM

Quote:

Originally Posted by 03GeeTee

If you don't mind me asking, how much did u spend on your shortblock? Im trying to put one together somewhat on the cheap

I built it myself, so I don't really have a total cost for just the shortblock. I could dig up some receipts and get back with you if you really want on the parts.

Just let me know!

dg98gt · 10-01-2009, 04:13 PM

Quote:

Originally Posted by sxynerd

+1

My boost went up 3lbs with the 10% OD IW. Upgrade to the T trim and keep the pulley you have now. Check what you've gained, then go from there.

3lbs!......thats probably what 30-35rwhp right there. I didn't realize it would be that much. I was thinking 10% or 1.4lbs in my case. This will definitely be my first on the list. What blower pulley are you running?

Did you upgade yours from the s-trim to the t-trim, or did you buy a heavy duty t-trim head unit? I was under the impression that the heavy duty t-trim could be spun to 60,000rpm, but if you just upgrade the impeller/volute of the s-trim to a t-trim (non-heavy duty bearings), that the rpm's are still limited to 50,000? I could be way off here.......I'm not sure! I need to call vortech and check.

I think the upgrade is around $600 for the T, $300 for the SI, but a new head unit would cost over $2000. Since my s-trim has lasted perfectly for 47,000 miles, I don't really want even vortech to break open the case and start replacing stuff. It's never the same.

teej281 · 10-01-2009, 04:39 PM

Id just upgrade to a big blower and go for more than 600rwhp. YSI or equivilent.

amoosenamedhank · 10-01-2009, 04:40 PM

Well if you're already seeing some where in the neighborhood of 13-14lbs... adding 3 is going to put you pretty dang close to the limitations of the S trim. I would still go for it... worst case scenario, it tappers off at the end and then you upgrade anyways!

I can't remember his name, but he was a 4.6 mod awhile back. Had a built car (sonic blue, looked stock) and when he swapped from shorties to long tubes he literally saw 18rwhp gain... IMO unless you're really scrapping for a little extra power keep your exhaust setup.