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475+ RWHP build :)

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Old Dec 24, 2007 | 07:21 PM
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Default 475+ RWHP build :)

well guys i've only had the Vette like 6-7 months and am finally getting the SERIOUS mod bug so i'm doing some upgrades Picked up some Chrome C6 Z06 rims, getting a FULL repaint(rock chips on nose and rockers) and some STICKY tires here comes the FUN part and the parts i have: Z06 heads polished and port matched to a LS6 intake manifold, Ported and polished Z06 T/B matched to the intake, Custom 3.5" airbride with Dual cone intake, TSP longtubes w/ Offroad X-pipe thru B&B mufflers, Magic Stick 4 cam w/ 111LSA, Rollmaster double timing chain(adjustable), PRC double valvesprings and Thunderracing Pushrods, ASP underdrive pulley, TSP LS6 oil pump. Picking up gaskets and bolts from the dealer on Wednesday Doug Rippie Motorsports is doing my tune and expects at least 470 RWHP and said i will probably be closer to 490-500. Parts i have to get yet is a DTE rear brace just for good measure. I'll show you guys some after pics but i was curious if there are any other things you'd get while i'm at it? i'm still thinking i will be getting some ARP rod bolts just to hold better then stock. Anybody else think that is advisable?~Cole~
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Old Dec 24, 2007 | 09:29 PM
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Looks like a nice setup if you can put up with the drivability of the Cam. I'm expecting that you are doing a ported FAST 90mm too?Let us know what it makes
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Old Dec 24, 2007 | 10:16 PM
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Might as well get a new clutch while you're there.
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Old Dec 24, 2007 | 10:47 PM
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I somehow don't see 490-500 rwhp coming out of ported LS6 heads, an off the shelf cam, and an LS6 intake.
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Old Dec 25, 2007 | 02:28 AM
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Originally Posted by Mike94ZLT1
I somehow don't see 490-500 rwhp coming out of ported LS6 heads, an off the shelf cam, and an LS6 intake.
I would have to agree with Mike on that one.....thought the same thing as I read over the list of mods. Every dyno reads differently of course, but I bet if you rolled that same combo on say six different dyno's, the average would be closer to 460 than 500. Even that thru an LS6 intake is pretty good and wouldn't be considered a "lay up" by any means.

Tony

Last edited by Tony Mamo @ AFR; Dec 25, 2007 at 02:31 AM.
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Old Dec 25, 2007 | 02:30 AM
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Originally Posted by Tony Mamo @ AFR
I would have to agree....every dyno reads differently however, but if you rolled that same combo on say six different dyno's I bet the average would be closer to 460 than 500. Even that thru an LS6 intake is pretty good.

Tony
dang! 460 rwhp is more than a C6 z06
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Old Dec 25, 2007 | 02:50 AM
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well all in all we will see come spring i'd be happy with 460-470 even. I've talked with alot of guys with the MS4 cam and they said as long as the tuner has dealt with them they are very streetable when tuned right. The shop i'm getting it done at has dealt with this cam before and says he's dyno'd 447 RWHP on a MS4 cam car with only an LS6 intake and Headers and intake, i'd expect with my better heads, ASP underdrive and a less restrictive exhaust then the F-body that had it in it, that i could hit more then 460. We will see i guess. I've heard on NUMEROUS occasions of cars getting between 65-80 RWHP on CAM ONLY(the MS4) on a regular basis. And that is BONE stock down to the paper airfilter and the only mod is the MS4 cam w/ double springs and pushrods. I'm not trying to start anything or an arguement about it i'm just going by what i have read, and heard MANY times over. I'm just excited because this is the first car i've ever had the time and money to do a nice Heads/cam setup ~Cole~
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Old Dec 25, 2007 | 02:57 AM
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another thing about the fast 90 intake. i'm stickin' with the LS6 but why all the praise for the fast 90? i've heard for the $1k it's not worth the extra 5-10hp it'll make over the LS6. I've heard that the LS6 intake has no problems on cars w/ upwards of 800+ hp? maybe i'm missing something but i wouldn't TOUCH a fast 90 unless i got it CHEAP. i'd rather spend my money on something more worth it.
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Old Dec 25, 2007 | 04:41 AM
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Originally Posted by ColeTrains'98Vette
another thing about the fast 90 intake. i'm stickin' with the LS6 but why all the praise for the fast 90? i've heard for the $1k it's not worth the extra 5-10hp it'll make over the LS6. I've heard that the LS6 intake has no problems on cars w/ upwards of 800+ hp? maybe i'm missing something but i wouldn't TOUCH a fast 90 unless i got it CHEAP. i'd rather spend my money on something more worth it.
Check out the new Weiand intake coming out in March 08. It's said to have 32 rwhp/ 31 rwtq over the LS6 and 20 over the FAST. Will be selling for around $650.00 will take the 78mm or 90mm TB.
http://v8tvshow.com/content/view/445/1/
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Old Dec 25, 2007 | 05:22 AM
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I think those mods will get you around 450rwhp, which is pretty awesome! The LS6 intake is going to cost you up top. Trust me, it's choking my 383 above 5900rpm.
Don't get hung up on dyno numbers, especially other people's dynos. There is a lot of physical and computer manipulation that can be done to inflate numbers. If you want to see how difficult it is to get an honest 500rwhp from a heads/cam set-up, read PatrickG's thread on ls1tech.com...and he went through a solid rear axle.
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Old Dec 25, 2007 | 07:05 AM
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Im running basicly the same thing only a little smaller cam,patriot heads,and a 3:90 gear.It dynoed at 425. I cant see you making 450.Hope you do.
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Old Dec 25, 2007 | 08:06 AM
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Originally Posted by SleeperC5
Check out the new Weiand intake coming out in March 08. It's said to have 32 rwhp/ 31 rwtq over the LS6 and 20 over the FAST. Will be selling for around $650.00 will take the 78mm or 90mm TB.
http://v8tvshow.com/content/view/445/1/

i am so all over that!
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Old Dec 25, 2007 | 09:05 AM
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450 sounds reasonable, if not optimistic.



As for what else you need...you didn't mention injectors? You'll need larger ones.

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Old Dec 25, 2007 | 10:22 AM
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agreed with above, 450 with a good tune

as for a reccomendation, ditch that 98 pcm, your gonna leave power and driveability on the table with that MS4 and 98 PCM
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Old Dec 25, 2007 | 01:32 PM
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Originally Posted by Y2Kvert4me
450 sounds reasonable, if not optimistic.
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Old Dec 25, 2007 | 01:57 PM
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I might think 475-500 FW. Are you sure that is not what they meant?

Last edited by see5; Dec 25, 2007 at 02:01 PM.
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Old Dec 25, 2007 | 02:22 PM
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Originally Posted by blkdevl
i am so all over that!
Me too! Would be even better if it was smog-legal here in SoCal. I can't do long-tubes, but it'd be nice to pick up a solid 30 hp via an intake!
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Old Dec 25, 2007 | 07:41 PM
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No he said to the rear WHEELS well i guess in the end i will see in the spring Also why ditch the PCM from the '98 and what is the problem that restricts it so much. Also how do you change the damn thing out, like is there any special thing i have to do besides just hook up a new PCM? Also injectors will be upgraded as well, just have to pick the ones i want. Also clutch is gonna be done. Which one is yet to be determined~Cole~

Last edited by ColeTrain'sC5; Dec 25, 2007 at 07:44 PM.
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Old Dec 25, 2007 | 10:23 PM
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I have a similar engine set-up only without the monster cam ( I'm at .221/.221) so knowing mine has 475 crank HP and 380 RWHP with an A4--I would guess yours to be close to 500 crank HP and 440 RWHP with a M6-------
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Old Dec 25, 2007 | 11:23 PM
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You should easily hit 450 as I managed to do that with a smaller cam and out the box dart 205 heads. I would ask though who did the porting on the ls6 heads? I know 500 is possible with ls6 heads if you have the right head porter. I am waiting on a se of ls6 heads from Larry Meaux, who is an exceptional porter. I would say like mentioned before the ls6 manifold will be holding you back. I know a lot of cars that pick up 20 rwhp from a 90mm ls2 tb and fast manifold.
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