05-15-2003, 11:04 AM
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Virgin Z-28!
O.k. guys and girls. Here's the situation. I got a '98 Z28, A4. The only thing that's been done to it is the K & N and free mods. What are the best and most effective first mods. Please keep in mind I'm on a budget, but I'm open to any suggestions. Some times or proof of performance enhancement would be greatly appreciated just so I'll kind of know what to expect.
Thanks. 
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05-15-2003, 11:47 AM
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1. Air lid. (about a tenth or 2)
2. Exhaust cutout/dump usually costs about $50 (1/10 or 2) 3. Torque converter (2-5 tenths) 4. Drag radials (allows you to launch harder meening 1-3 tenths) 5. SFCs 6. LCAs 7. LCA relocation brackets Free mods, just in case you have not done all of them: WOT mod Free ram air EGR mod TB bypass Descreen MAF Port MAF Port TB
__________________
1998 Onyx Black Z/28 408 cubic inches of nitrous injected LS1... Owner/Administator of THE Premier LS1 racing site: LS1 Racer.com My Cardomain ET1(SS/DV) US Navy
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05-15-2003, 03:09 PM
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mkdiver hit the nail wright on the head! you cant go wrong w/ descreening your maf, headers, bellow, or asp crank pulley either.
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2002 nbm ss factory options= t tops,m6, blk leather,asr,slp zr1's,auburn,bilstien,dual/dual, 345 hp package,dash plaque,grille, and mats. mods = tea stage 1.5 5.3 truck heads, w/ 11.1 to 1 comp, tr 224 cam, qtp merge headers, qtp 3' y pipe, no cats,corsa exhaust, asp crank pulley, taylor thundervolt wires, ported maf, ported tb, slp bellows, holley filter, pro 5.0 w/ lou's short stick, cags, bmr stb, kenny brown sfc, bmr torque arm, bmr lca's, bmr panrod, bmr ds loop, spec s3 clutch, poly t mount, moser 12 bolt w/ 4.11's, tsp 85mm cf air lid, rksport chrome ss badges, rksport cf interior kit, macewen gauges, harlan shift light, autometer gauges, tnt 100shot wet kit, srp ss pedals, american racing torque thrust 2's , clear corners and side markers, tinted windows, custom black painted rear panel (like berger cars), chrome hoodscoop grille, painted calipers w/ camaro letters, and lots of zaino! ( other than that she's stock) dyno'd 436 rwhp 403 ft. ilbs torque = na 547 rwhp 559 ft. ilbs torque = n20
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05-15-2003, 03:21 PM
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when you descreen the maf, aren't you opening your engine up for possible trash ? I mean, how much performance do you really get out of it? Is it worth the risk?
Last edited by shinson; 05-15-2003 at 03:23 PM..
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05-15-2003, 04:21 PM
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yes, you are more open to trash. but i bought an slp maf ($165.00) and dynod slp maf and then dynod stock maf w/ screen out and the desceened maf actually had 1 more rwhp gain over the slp. im just saying i wasted 160 bucks. its your call
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2002 nbm ss factory options= t tops,m6, blk leather,asr,slp zr1's,auburn,bilstien,dual/dual, 345 hp package,dash plaque,grille, and mats. mods = tea stage 1.5 5.3 truck heads, w/ 11.1 to 1 comp, tr 224 cam, qtp merge headers, qtp 3' y pipe, no cats,corsa exhaust, asp crank pulley, taylor thundervolt wires, ported maf, ported tb, slp bellows, holley filter, pro 5.0 w/ lou's short stick, cags, bmr stb, kenny brown sfc, bmr torque arm, bmr lca's, bmr panrod, bmr ds loop, spec s3 clutch, poly t mount, moser 12 bolt w/ 4.11's, tsp 85mm cf air lid, rksport chrome ss badges, rksport cf interior kit, macewen gauges, harlan shift light, autometer gauges, tnt 100shot wet kit, srp ss pedals, american racing torque thrust 2's , clear corners and side markers, tinted windows, custom black painted rear panel (like berger cars), chrome hoodscoop grille, painted calipers w/ camaro letters, and lots of zaino! ( other than that she's stock) dyno'd 436 rwhp 403 ft. ilbs torque = na 547 rwhp 559 ft. ilbs torque = n20
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05-15-2003, 10:28 PM
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yes slp 85 mm maf. the gran ($200 plus) waste. 6rwhp on the descreened and 5 on the slp 85 mm
__________________
2002 nbm ss factory options= t tops,m6, blk leather,asr,slp zr1's,auburn,bilstien,dual/dual, 345 hp package,dash plaque,grille, and mats. mods = tea stage 1.5 5.3 truck heads, w/ 11.1 to 1 comp, tr 224 cam, qtp merge headers, qtp 3' y pipe, no cats,corsa exhaust, asp crank pulley, taylor thundervolt wires, ported maf, ported tb, slp bellows, holley filter, pro 5.0 w/ lou's short stick, cags, bmr stb, kenny brown sfc, bmr torque arm, bmr lca's, bmr panrod, bmr ds loop, spec s3 clutch, poly t mount, moser 12 bolt w/ 4.11's, tsp 85mm cf air lid, rksport chrome ss badges, rksport cf interior kit, macewen gauges, harlan shift light, autometer gauges, tnt 100shot wet kit, srp ss pedals, american racing torque thrust 2's , clear corners and side markers, tinted windows, custom black painted rear panel (like berger cars), chrome hoodscoop grille, painted calipers w/ camaro letters, and lots of zaino! ( other than that she's stock) dyno'd 436 rwhp 403 ft. ilbs torque = na 547 rwhp 559 ft. ilbs torque = n20
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05-16-2003, 07:42 AM
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nope no instructions, just beat it out.
__________________
2002 nbm ss factory options= t tops,m6, blk leather,asr,slp zr1's,auburn,bilstien,dual/dual, 345 hp package,dash plaque,grille, and mats. mods = tea stage 1.5 5.3 truck heads, w/ 11.1 to 1 comp, tr 224 cam, qtp merge headers, qtp 3' y pipe, no cats,corsa exhaust, asp crank pulley, taylor thundervolt wires, ported maf, ported tb, slp bellows, holley filter, pro 5.0 w/ lou's short stick, cags, bmr stb, kenny brown sfc, bmr torque arm, bmr lca's, bmr panrod, bmr ds loop, spec s3 clutch, poly t mount, moser 12 bolt w/ 4.11's, tsp 85mm cf air lid, rksport chrome ss badges, rksport cf interior kit, macewen gauges, harlan shift light, autometer gauges, tnt 100shot wet kit, srp ss pedals, american racing torque thrust 2's , clear corners and side markers, tinted windows, custom black painted rear panel (like berger cars), chrome hoodscoop grille, painted calipers w/ camaro letters, and lots of zaino! ( other than that she's stock) dyno'd 436 rwhp 403 ft. ilbs torque = na 547 rwhp 559 ft. ilbs torque = n20
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05-16-2003, 07:43 AM
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oh, be careful not to hit the sensors!!
__________________
2002 nbm ss factory options= t tops,m6, blk leather,asr,slp zr1's,auburn,bilstien,dual/dual, 345 hp package,dash plaque,grille, and mats. mods = tea stage 1.5 5.3 truck heads, w/ 11.1 to 1 comp, tr 224 cam, qtp merge headers, qtp 3' y pipe, no cats,corsa exhaust, asp crank pulley, taylor thundervolt wires, ported maf, ported tb, slp bellows, holley filter, pro 5.0 w/ lou's short stick, cags, bmr stb, kenny brown sfc, bmr torque arm, bmr lca's, bmr panrod, bmr ds loop, spec s3 clutch, poly t mount, moser 12 bolt w/ 4.11's, tsp 85mm cf air lid, rksport chrome ss badges, rksport cf interior kit, macewen gauges, harlan shift light, autometer gauges, tnt 100shot wet kit, srp ss pedals, american racing torque thrust 2's , clear corners and side markers, tinted windows, custom black painted rear panel (like berger cars), chrome hoodscoop grille, painted calipers w/ camaro letters, and lots of zaino! ( other than that she's stock) dyno'd 436 rwhp 403 ft. ilbs torque = na 547 rwhp 559 ft. ilbs torque = n20
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05-16-2003, 10:10 AM
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Quote:
Here is an example: this kid at the track the other day had a 2002 Z28, A4 stock except for a straight pipe replacing the muffler, and a K&N filter, that was it! and ran 13.02 @110 mph NICE! Then I showed him how to do the free mods, so he decided to descreen his MAF. The next pass was 12.92 @ 111mph Then the 3rd pass was 12.86 @111.5mph I think the proof is in the pudding as the saying goes!
__________________
1998 Onyx Black Z/28 408 cubic inches of nitrous injected LS1... Owner/Administator of THE Premier LS1 racing site: LS1 Racer.com My Cardomain ET1(SS/DV) US Navy
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06-05-2003, 12:59 AM
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Actually, 1 rwhp is nothing. Every run on the dyno will vary a few rwhp. So, I doubt you gained any power from descreening it. Unless you ran 15-20 dyno runs with and without the screen, then average them out. Then compare both averages, and if you still have a difference of 1 rwhp between the two, then i guess it helped.
Also, descreening the MAF on 98's usually will cause problems. I've looked into this on CamaroZ28.com and almost everyone with a 98 A4, had PCM issues when the descreened the MAF. I would not recommend it. The stock MAF can handle up to about 450 hp, so just leave it alone till you make that much power. It saves stressing over PCM problems, invisible hp gains, and wasted money. Don't get me wrong. I think the MAF is a good mod, just one that should be done after most other stuff.
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Custom Zaino Detailing Email me for details Moderator at Z28owners.net 1998 NBM Z28, A4 2.73, SS rims, True Duals, Jet Hot LT's, 3" pipes, Random Tech cats, Dr. Gas X-Pipe, Dynomax Bullet Mufflers, HPP3, CAI, MTI Clear Lid, BMR Adj Torque Arm ,BMR LCA, custom painted interior, and a big ass bowtie in the rear window  .Ask yourself this question: Who would you turn to in a life-threatening crisis? 1) someone wearing a Tommy Hilfiger T-shirt, 2) Someone wearing a Minnesota T-Wolves jersey, or 3) Someone wearing an NRA hat
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06-05-2003, 08:47 AM
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I appreciate the warning about possible PCM problems, but I've already descreened my maf and experienced a pretty significant gain. Not to say that some people haven't experienced problems, but I would certainly recommend it.
Peace.
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