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cam selection for GTO

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Old May 30, 2005 | 07:09 PM
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Default cam selection for GTO

I have a 04 GTO M6 and want to put a cam in it. It isn't driven every day because I have a company pickup. Current mods are CAI and Kooks 1 7/8" headers w/cats. comming mods will be a ASP pulley, HP tuners, and maybe a ported TB. I was thinking about the F13 on a 114. It seems to make good low end TQ which I want, but also alot of HP, I will probably do a set of AFR heads down the road and want a cam that will work well with them. Any suggestions?
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Old May 30, 2005 | 10:09 PM
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I'd say you aren't worried about losing low end with those 1 7/8 headers on a basically stock car. Anyway, I'd say G5X3 or a FMS cam (not sure which one, I just started looking at them but they look great). I'd also consider a FAST 90 to throw on top of it, especially if you're looking at heads in the near future.

It does seem that some GTO guys are worried that the big cams aren't good for the car since the GTO weighs a bit more than the fbody. I say bleh to that because the bigger cams are still making a ton of power down low so you'll still get moving and really scream up top as well.

Last edited by DMNSPD; May 30, 2005 at 11:06 PM.
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Old May 30, 2005 | 10:31 PM
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What kinda #'s are you looking for?
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Old May 31, 2005 | 03:49 PM
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I would like to see some solid 12 sec runs on street tires. Around 400 rwhp would be nice as well. I really don't do alot of driving below 2000 rpm. from what I read on this forum the F13 make very good HP and TQ. I like the way it sounds as well.
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Old May 31, 2005 | 03:53 PM
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FAST intake is not worth it unless you increase displacement.
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Old May 31, 2005 | 04:02 PM
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Originally Posted by UtOhCop
FAST intake is not worth it unless you increase displacement.
There's been solid gains from aggresive cam only LS1's and moderate H/C combos with a fast 90/90 setup. Admittedly the gains are bigger with more cubes, but there are gains to be had with 346 cu. in.
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Old May 31, 2005 | 04:20 PM
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I have the FM13 on a 112+4*, Allen recommended it to retain some of the lowend trq needed to move a heavier car like the GTO. I love this cam and I'm making good power considering my mods. There is a sound clip of my car on LS1sounds if you want to hear it.
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Old May 31, 2005 | 04:21 PM
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Originally Posted by UtOhCop
FAST intake is not worth it unless you increase displacement.
Expect at least 10-15 on a large cam 346 over the LS6. It's proven, but it's expensive.
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Old May 31, 2005 | 05:35 PM
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Originally Posted by Shu
I have the FM13 on a 112+4*, Allen recommended it to retain some of the lowend trq needed to move a heavier car like the GTO. I love this cam and I'm making good power considering my mods. There is a sound clip of my car on LS1sounds if you want to hear it.
What kinda low end tq are you making? Hows driveability? How uch power did you gain with just the cam? I was under the impressions it would make more TQ on a 114?
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Old May 31, 2005 | 05:51 PM
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Car is tuned. Drivability was fine untuned, had to help the idle along sometimes but no big deal. I didn't dyno my car between all my mods, I did everything at once. Most '04 GTO's are dynoing at about +/-300whp +/-310trq stock, check LS1gto.com for specifics. Im running the stock airbox, pulley, TB, and Cat-back, so for LT's, Intake arm, and a cam I think i'm doing alright. The GTO's IRS might suck up a few ponies aswell, compared to F-bodies.

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Old May 31, 2005 | 08:04 PM
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my car stock made 258hp and 288 tq? on a mustang dyno which are usually about 10% low. I looks like you gained about 75-85 hp and 40-50 tq from just a cam, headers and maf pipe. those are awsome gains fo around 2 grand
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Old Jun 1, 2005 | 07:34 AM
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Originally Posted by juiced01s10
my car stock made 258hp and 288 tq? on a mustang dyno which are usually about 10% low. I looks like you gained about 75-85 hp and 40-50 tq from just a cam, headers and maf pipe. those are awsome gains fo around 2 grand
But Shu's numbers are from a dynojet. IMO, with those mods (especially that cam), I'd be dissappointed.
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Old Jun 1, 2005 | 11:39 AM
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Originally Posted by DMNSPD
But Shu's numbers are from a dynojet. IMO, with those mods (especially that cam), I'd be dissappointed.
I thought about being dissappointed then I remembered all the bolt ons I'm missing (TB, pulley, Cat-back, Intake). Intake is costing me I'm sure, but I didn't want a shitty looking intake on my car, i.e. cone filter. I wanted to retain the stock look and I'm happy with the way this thing runs.
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Old Jun 1, 2005 | 03:56 PM
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I think that is the cam I will go with. I don't think I lost alot of low end TQ, maybe a little. I definatly gained a good amout up to cuz it pulls much harder now
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Old Jun 1, 2005 | 06:06 PM
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Originally Posted by Shu
I thought about being dissappointed then I remembered all the bolt ons I'm missing (TB, pulley, Cat-back, Intake). Intake is costing me I'm sure, but I didn't want a shitty looking intake on my car, i.e. cone filter. I wanted to retain the stock look and I'm happy with the way this thing runs.
OH! I didn't notice you didn't have a catback or anything! I thought since you had the headers and stuff you would of had everything else. I retract my previous statement. Those are excellent numbers. You will see a HUGE improvement when you get more air in and more air going out
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Old Jun 1, 2005 | 06:30 PM
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you will probably see 400 rwhp with an intake and pulley
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Old Jun 1, 2005 | 07:14 PM
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Originally Posted by juiced01s10
you will probably see 400 rwhp with an intake and pulley
At least.
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Old Jun 1, 2005 | 07:58 PM
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Originally Posted by UtOhCop
FAST intake is not worth it unless you increase displacement.
where have you been doing your research? I have heard of 20 rwhp pickup with the 90/90 even on mild h/c setups over ported tb/ls6 intake.

Last edited by 52172; Jun 1, 2005 at 08:05 PM.
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