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  • #1

    Heads question

    I have a friend that has a 95 Z28 and a guy he knows told him that for a $1000 he would port and polish his heads and a few other things(he cant remember what else was said) and this would give him and extra 200hp--he would even prove it on a dyno--im trying to figure out how he would do this unless he is talking about a cam and atleast a few other things while he is in there---am i wrong? is there some particular questions i should have him ask this guy to make sure he's not full of it??

    Thanks
    Black '96 Z28, loudmouth exhaust, Mac mid length headers, crane cams powermax 104227 cam, crane 1.6rr,'s, springs, lifters and pushrods. MSD distributor, slp ultra z hood with air box, bbk 52mm throttle body, march underdrive pulleys, hpp+, 1le sway bars, spohn LCA's and relo brackets, Spohn SFC's, adj panhard bar, bilstein shocks, H&R springs, strut tower brace...Audio-Alpine head unit, MB Quart 6.5" component in the front and 6.5" Boston in the rear w Alpine 75x4 amp, Alpine Type-X 12 in the trunk w/ alpine 1000w amp
    Tags: None
  • #2
    i am almost positive you will NOT see those kinds of gains from head porting alone. That car would need headers (full exhaust), valve job, fully ported, and an aggressive cam to pull those kinds of numbers.
    97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM

    01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines

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    • #3
      You'd have to have at least a cam, bigger injectors, bigger throttle body, valve springs, headers and a good tune to go with it.
      '95 Trans Am - A4, LE2 heads, LE1 cam, 1.6 ProMags, Comp R's, AS&M CAI, AS&M 54mm, MAC midlengths, Random Tech. cat, Borla cat back, PCMforless, Vigilante 2800, 3.73's, BMR LCAs/panhard/shock tower brace

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      • #4
        thats basically what i was thinking--a minimum of springs and valves and a large cam-plus much more little things-
        Black '96 Z28, loudmouth exhaust, Mac mid length headers, crane cams powermax 104227 cam, crane 1.6rr,'s, springs, lifters and pushrods. MSD distributor, slp ultra z hood with air box, bbk 52mm throttle body, march underdrive pulleys, hpp+, 1le sway bars, spohn LCA's and relo brackets, Spohn SFC's, adj panhard bar, bilstein shocks, H&R springs, strut tower brace...Audio-Alpine head unit, MB Quart 6.5" component in the front and 6.5" Boston in the rear w Alpine 75x4 amp, Alpine Type-X 12 in the trunk w/ alpine 1000w amp

        Comment

        • #5
          Originally posted by fullthrottleZ
          I have a friend that has a 95 Z28 and a guy he knows told him that for a $1000 he would port and polish his heads and a few other things(he cant remember what else was said) and this would give him and extra 200hp--he would even prove it on a dyno--im trying to figure out how he would do this unless he is talking about a cam and atleast a few other things while he is in there---am i wrong? is there some particular questions i should have him ask this guy to make sure he's not full of it??

          Thanks
          When monkeys fly out his butt. It's gonna take major work to coax 200 hp out of an LT-1 without a power adder. It would take a great set of heads and not a backyard port job, cam, intake, headers, exhaust, dyno tune and more. Not only that, the powerband would be shifted much higher than stock unless it's a stroker with a serious increase in displacement. Adding 200 HP is going to cost some serious dough, no way it's going to happen for a grand.

          Comment

          • #6
            Agreed. I think a more accurate number for a really good port and polish would be 20 hp, or 200/10
            94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...

            Comment

            • #7
              This is a pretty good website showing what can be done with an LT1 heads & cam package, and it lists what is needed to support that package. His claims seem to be backed up by independant dyno tests of cars with the packages installed. Interesting, because it gives you a relative cost for each power level, and what it takes to support it. I think these are some of the less expensive packages that have shown these results.

              http://www.eportworks.com/Products.htm

              LE1 heads/cam - $1,100 - 370-390rwHP
              LE2 heads/cam - $1,650 - 400-420rwHP
              LE3 heads/cam - $1,850 - 410-420rwHP

              If you think in terms of a stock LT1 + 200flywheel HP = 485 flywheeHP it would appear that you are in the ballpark with the LE3 setup. But look carefully at the required supporting parts.
              Fred

              381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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              • #8
                I am wanting to hear peoples reviews and results of the LE1 and the LE2 combos. I have been searching but cant find any real information. I am considering one of these packages in the future cause those gains are impressive.
                1995 Z28 Convertible, 350ci LT1 73K miles M6.
                Dyno results: 301.5 RWHP 326.7 RWTQ
                Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

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                • #9
                  You need to go to the more active F-Body bulletin boards.... 2 examples of which are:

                  http://web.camaross.com/forums/index.php?
                  http://www.fbody.com/cgi-bin/lt1/postform.cgi

                  There are frequent discussions on CZ28.com, and I've seen a post recently on fbody.com with some results.
                  Fred

                  381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

                  Comment

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