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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-08-2005, 01:57 PM   #11
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In some cases I've seen the need for OR pushrods Shawn. A local GTP buddy of mine tried 1.9 rockers with LS6 springs and didn't bother with the OR pushrods. He was getting wicked valve float past roughly 5700rpm. Depends on the specific combination of mods I'm sure.
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Old 06-08-2005, 07:32 PM   #12
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Quote:
Originally Posted by Allmachtige
In some cases I've seen the need for OR pushrods Shawn. A local GTP buddy of mine tried 1.9 rockers with LS6 springs and didn't bother with the OR pushrods. He was getting wicked valve float past roughly 5700rpm. Depends on the specific combination of mods I'm sure.
I'm not saying they aren't necessary for some combinations. They definatley are necessary for some combinations, and it varies from car to car, two cars might have identical setups and one might get bad valve float and the other no valve float. However, most of the L36 cams have about the same lift, and some even less than you would have with 1.9 rockers, so float shouldn't be a problem for most. However, for the price you might as well throw the pushrods in when you have it apart. My dad put his in when he installed his rockers, and he got float above 5900 or so, so he put in the 90lb. springs and the float was gone. However, the SSEi has completely stock valvetrain except for the 1.9 rockers, and even with 140k on it its never had a float problem.

Shawn
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Old 06-08-2005, 11:07 PM   #13
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Quote:
Originally Posted by dbtk2
OR pushrods don't make that much difference.
Roller Rockers don't require as much lubrication as the stock rockers do. Because of this, not as much oil is needed in the valvetrain area and oil-restricted rods are recommended because they keep more oil down in the motor where its most critical. They won't do much for horsepower but they will add a protection factor to the motor as well as help keep the lifters pumped up.

A higher stall converter is recommended with any aftermarket cam especially in an N/A application. Most aftermarket cams make their power up top and the power band shifts upwards. This causes a loss on the bottom end that is easly accounted for with a supercharged car however in an N/A motor not so much. By increasing the stall speed of the converter the motor can instantly rev up into the powerband of the cam. The GT1 cam may work better than most because it does not shift the rpm band up as high as most of the other more aggressive cams however it wont make as much power up top because of this.
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Old 06-08-2005, 11:42 PM   #14
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[quote="Rogue"]
Quote:
Originally Posted by dbtk2
The GT1 cam may work better than most because it does not shift the rpm band up as high as most of the other more aggressive cams however it wont make as much power up top because of this.
This might be true but theres only a 14hp difference between the highest GT1 powered dyno and the overall highest n/a dyno which is the intense stage 3 setup.

On a side note i'm kinda dissapointed that stage 3 setup never hit the track.
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Old 06-09-2005, 01:44 AM   #15
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14whp might not sound like much, but thats actually a pretty considerable gain for a N/A engine with that displacement.

Quote:
Roller Rockers don't require as much lubrication as the stock rockers do. Because of this, not as much oil is needed in the valvetrain area and oil-restricted rods are recommended because they keep more oil down in the motor where its most critical. They won't do much for horsepower but they will add a protection factor to the motor as well as help keep the lifters pumped up.
I realize this, I know that OR pushrods do help keep the lifters pumped up reducing valve float, I was just saying that for most cam setups they aren't necessary. People keep saying that you NEED to replace pushrods with a cam swap, and while its a good idea, in most mild setups its not necessary at all. Believe me, if I didn't feel they made a difference they wouldn't be in the GTP right now, they are the only remaining INTENSE part in the GTP. Due to how Scott treated my dad a few years ago my dad would jump at just about any chance to pull an INTENSE part out of his car if it isn't helping him make power (which is why they are the only ones left), so if they didn't work, he definately wouldn't be using them. They are what allow him to run 90lb springs with an XP cam when everyone else is running 105lb springs or more.

Shawn
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Old 06-09-2005, 08:51 AM   #16
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Quote:
Originally Posted by 95naSTA
This might be true but theres only a 14hp difference between the highest GT1 powered dyno and the overall highest n/a dyno which is the intense stage 3 setup.

On a side note i'm kinda dissapointed that stage 3 setup never hit the track.
Thats 14whp and whp is very hard to get on an N/A motor as most owners know.

The stage 3 setup did hit the track at IDD VI however there were some issues with the setup and the car only went 13.6.
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Old 06-09-2005, 10:56 AM   #17
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Quote:
Originally Posted by Rogue
Quote:
Originally Posted by 95naSTA
This might be true but theres only a 14hp difference between the highest GT1 powered dyno and the overall highest n/a dyno which is the intense stage 3 setup.

On a side note i'm kinda dissapointed that stage 3 setup never hit the track.
Thats 14whp and whp is very hard to get on an N/A motor as most owners know.
True True. I wasn't trying to say 14 more whp was easy to get, i'm just saying that if your not going for broke then theres still alot of potential with a milder GT1 cam.
But on the 14 more whp isn't easy note. I think wes had a 4k stall compared to the gt1 cam dyno with a 3800 stall so the higher 4k stall might have sucked up a couple whp.

Quote:
Originally Posted by Rogue
The stage 3 setup did hit the track at IDD VI however there were some issues with the setup and the car only went 13.6.
Any info on why that setup wasn't continued? I see everything up for sale in the Intense garage. And I think i've read that Wes is goin back to his stage 2 setup.
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Old 06-09-2005, 11:15 AM   #18
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Quote:
Originally Posted by 95naSTA
Any info on why that setup wasn't continued? I see everything up for sale in the Intense garage. And I think i've read that Wes is goin back to his stage 2 setup.
The stuff on the garage sale page was not the stage 3 setup we did in Wes'* car.

Wes'* car which dyno'd 248whp used our standard stage 3 N/A heads and stage 3 N/A cam. He does have a higher stall converter though. He was battling some suspension issues for a while (axles, tie rods, etc..) which gave the car a bad shake and may have reduced his E.T. Towards the end of the day he also mentioned a noise coming from the back of the engine however when we pulled it apart we found nothing wrong.
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