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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 01-10-2004, 02:02 PM   #21
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Quote:
Originally Posted by willwren
Wild and Mn, what are you looking for here? Rollers, or a different ratio? You have rollers. You're driving 93'*.
I'm looking for a different ratio for more power. A Cam is looking like A LOT of workAfter seeing the figures on Rogue'* 8-ball, it seems to be a nice idea. I know it won't be as much of a gain as his */Ced car, but the L27 has much room for mods

What kind of cost are we lookin at here?
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Old 01-10-2004, 02:35 PM   #22
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very true Will. i even did a set of 93 rockers to retrofit them to a 92.
i took a set of 93 rockers, redrilled the bolt hole from 5/16" to 3/8" and did the same with the pedestals. then went to napa and got 12 3'8" x 2" grade 8 allen socket head bolts. they are a direct fit now and have the roller fulcrum that the 92 doesnt
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Old 01-10-2004, 05:26 PM   #23
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Quote:
Originally Posted by willwren
Wild and Mn, what are you looking for here? Rollers, or a different ratio? You have rollers. You're driving 93'*.
Different ratio, man. I'm not wanting to cam it, for some of the same reason as BonneMe mentioned. I want to do that, find a way to dyno it somehow, then, when I get my intercooler idea finished up and milled and tested, dyno again. I'm looking to go smaller than 2.0" on the pulley... ...with all that forced air, I want to open the ports a little...might have to do some P&P....but I don't want it too aggressive in the cam area. I'm in the process now of working up some numbers...

EDIT-->I don't want to say too much right now, as I have no clue just yet...
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Old 01-10-2004, 06:38 PM   #24
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smaaler than a 2" may not be possible. you still have the shaft size and the nut size to limit you. plus, without opeing up the heads, intake and exhaust, it will kinda be like constapating your motor with air. all that air and no where to go.as far as a cam, lift and duration is the key to getting all that air into the cylinders. the more you open your motor up and allow it to breath. a smaller pulley on the Sc will be much more efficent. if the air has somewhere to go, it wont build the heat as they do now. plus, if it is moving air freely, it will give you some power due to the fact the
SC isnt working so hard to force it into the cylinders.
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Old 01-10-2004, 06:51 PM   #25
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Quote:
Originally Posted by willwren
Wild and Mn, what are you looking for here? Rollers, or a different ratio? You have rollers. You're driving 93'*.
Yes, they have roller fulcrum rockers, but I would assume the roller rockers Jeffrey is talking about are roller fulcrum and roller tip rockers, correct? If so, that is where the advantage is, besides the added lift and duration of the higher ratio.

Shawn
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Old 01-10-2004, 07:12 PM   #26
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Quote:
Originally Posted by jeffrey10x2
smaaler than a 2" may not be possible. you still have the shaft size and the nut size to limit you. plus, without opeing up the heads, intake and exhaust, it will kinda be like constapating your motor with air. all that air and no where to go.as far as a cam, lift and duration is the key to getting all that air into the cylinders. the more you open your motor up and allow it to breath. a smaller pulley on the Sc will be much more efficent. if the air has somewhere to go, it wont build the heat as they do now. plus, if it is moving air freely, it will give you some power due to the fact the
SC isnt working so hard to force it into the cylinders.
Exactly. That'* what I'm saying. I am hoping I can open it some without the cam. The cooler I'm working on will go between the SC and the lower intake, about 3/4" thick, with tubes going through the intake area cooled to, hopefully, about -150*F, cooling the air temp to, roughly, 30-50 degrees on a hot day. This is just a very rough estimate until I get some more concrete numbers.

As for the shaft and nut size, it'* made out of iron and steel. Which means it can be changed...

As far as the heads are concerned, I'm kinda going with Ford'* Boss idea...
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Old 01-10-2004, 07:47 PM   #27
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the roller tip is a very small gain will not be noticable. i was looking into full roller rockers due to the fact i have a 92 with 3/8" studs. 93-94 can go with small block ford 1.6 or 1.7 pedestal rockers because they are a true pedestal mount like the 93-95 3.8 and also use 5/16" bolts. you just need to use custom length pushrods. with all the porting in the world, you still will be limited with your cam. a stock cam opens the intake valve a total of .403" and from the time it open till it closes is 181 degrees of crank rotation.
with the cam i had reground. it opens a total of .478" and 218 degrees of crank rotation.
think of it this way ok. take a bucket and put it in your sink. first turn the water on 3/4 of the way and for 1 min. and measure it. next, do the same but turn it on full and for 1 min 30 secs. which will have the most water in the bucket. this goes hand in hand with how lift and duration builds power in a motor.
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Old 01-10-2004, 07:56 PM   #28
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Quote:
Originally Posted by jeffrey10x2
the roller tip is a very small gain will not be noticable. i was looking into full roller rockers due to the fact i have a 92 with 3/8" studs. 93-94 can go with small block ford 1.6 or 1.7 pedestal rockers because they are a true pedestal mount like the 93-95 3.8 and also use 5/16" bolts. you just need to use custom length pushrods. with all the porting in the world, you still will be limited with your cam. a stock cam opens the intake valve a total of .403" and from the time it open till it closes is 181 degrees of crank rotation.
with the cam i had reground. it opens a total of .478" and 218 degrees of crank rotation.
think of it this way ok. take a bucket and put it in your sink. first turn the water on 3/4 of the way and for 1 min. and measure it. next, do the same but turn it on full and for 1 min 30 secs. which will have the most water in the bucket. this goes hand in hand with how lift and duration builds power in a motor.
Well, I know. I was planning a cam change and Boss heads and 1.7 rollers on the 351 in my Torino before I traded it. I guess I haven't really been to the drawing board on this yet, really. It'* just that the cam change was a hell of alot easier on that 351 than it will be on this 3800...heheh...I'm lazy...
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Old 01-10-2004, 10:36 PM   #29
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not really easier, lol you dont have to pull the rad on a 3800, just the ps motor mount and jack it up as high as you can. . it can defintly be done in the car. i just cant wait till april and see what numbers this beast turns out. im just hoping for somewhere in the 12'*. i put my car specs in to a new program i got called dragstrip2000. and i also have dyno2000. imported my engine data from that and used my gear, co. od drag, frontal area, tires, ect. and it came up with a 12.38 at 110mph with a 50 shot of nitrous. launching at 2000 and shifting at 5775. will cross the 1/4 at 5400 rpms.
god i cant wait.
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Old 01-10-2004, 10:42 PM   #30
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Finding a Series 1 pulley under 2" might be a trick too. Having one custom made (if it'* even possible) could cost upwards of 5 or 6 HUNDRED dollars. I design mechanical hardware on an almost daily basis, and know what these things can run.

PB has a 2" pulley, but that'* only for those with EXTREME mods, and an intercooler is a necessity first.
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