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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 06-27-2005, 12:40 AM   #21
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The rockers and pushrods are simple. You just pull your valve covers off (and everything that gets in the way of them) and unbolt the rocker arms, lift them out, and then from there the pushrods literally lift right out. So then you can set new pushrods in and set the new rockers in there and bolt them down. (after cleaning out the bolt holes to insure that there is no oil in them) The springs aren't too bad either but you have to hold the valve up by compressing the cyl. with air or by manually holding up the valve by wedging something in the cyl. Then you just compress the spring, pull the locks and retainer off and the spring comes right out. You set the new spring in and put the retainer on it, and then you compress it and put the locks in and move to the next. Its not too hard to do it is just very time consuming. Its not a bad idea to watch someone do it before trying to tackle it yourself, but it really isn't too bad.

Shawn
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Old 06-28-2005, 01:31 AM   #22
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Thanks Shawn for the reply. I haven't made my mind up if I'll do it yet or not.

I'm actually pretty satisfied with the performance end of it right now.

Will I damage anything with the shift points higher on the pcm with doing the rockers...etc...??
If not I may wait a while before doing it.

Thanks again

Tim
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Old 06-28-2005, 02:34 AM   #23
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Nothing should be damaged with a setup like this. Slightly higher shift points (6200rpm or under) aren't going to hurt anything, they'll just let you take advantage of the added power the rockers give. With ZZP 90lb. springs, OR pushrods, and 1.9 rockers my dad hit his 6600rpm rev limiter and no damage resulted from it. (this was at WOT in 2nd gear, so there was a lot of load on the engine) Now maybe if he did that many many many times it might damage something, but a 6200rpm shift point is pretty low for these engines, the bottom end can handle 7000+rpms no problem. The main thing stopping you from being able to rev high is the valvetrain, which with different springs and rockers you will be improving. The only thing you'll hurt the reliability of is your transmission due to the added stress you are putting on it with more power and higher revs, but any modification will do that and it shouldn't be too much of a problem if you don't race it everyday and you keep it maintained.

Shawn
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Old 06-29-2005, 01:51 AM   #24
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Thanks for the help. Right now I may let it go for a while. Like i said I'm pretty satisfied with the performance right now.

Are the harder shifts better for the tranny or worse?? I have heard it both ways.

I don't race my car and I do keep it maintained. So I shouldn't have any problems with the tranny right??


Thanks again,

Tim
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Old 06-29-2005, 01:53 PM   #25
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ok let me ask it this way; how much more power will I gain from a 1.8 rocker set up vs. 1.9 rocker set up? And putting them on the Bonne with the longer cruise/highway gears should yield more power .... shouldn't it?
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Old 06-29-2005, 03:03 PM   #26
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Quote:
Originally Posted by Bigfunkytown
ok let me ask it this way; how much more power will I gain from a 1.8 rocker set up vs. 1.9 rocker set up? And putting them on the Bonne with the longer cruise/highway gears should yield more power .... shouldn't it?
2/3 as much power. On an N/A car its more like 5 for 1.7, 10 for 1.8, 15 for 1.9 and double those numbers for a blown car.
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