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Wide powerband project, opinions/suggestions needed!!

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Old Jul 25, 2012 | 09:20 AM
  #1  
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Wide powerband project, opinions/suggestions needed!!

After countless hours of reading on which part to buy, how to tune an Evo, how to scale injectors, how to ANYTHING, I've decided do a little plan about what I'm going to do, in the couple years to come. I can do near all the work myself, so prices are pretty accurate (w/o shipping)

This is simple:
-I want a quick spooling ultimate street car.
-I want to have little to no difference to stock about the ease of daily driving it.
-I don't want lopey idle,
-I want power to start low: 4000rpm max. Otherwise the car will feel heavy.
-91 octane only here :S
-Regardless of peak hp lost, cams will be dialed for a powerband ending at 7000rpm. The rev limiter will be at about 7100rpm for long term reliability.

I ask you guys if you see something that is not properly matched in the project, or if something is wrong. Thanks to all for reading.
Here is what I've come up with:


(hoping the picture is easy to see)
I'm open to all suggestions. Thank you all!

Last edited by domyz; Jul 25, 2012 at 08:23 PM.
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Old Jul 25, 2012 | 09:33 AM
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you'll definitely want a clutch but i dont think the twin disk isnt needed for that power. nor do i think the transmission or tcase is need but thats kindof a investment that yours wont go out so it could be money well spend. id run e85 tho, no reason not to!!! btw i had a exedy twin disk and i hated going to drive thru and traffic.

Last edited by EVO8STI; Jul 25, 2012 at 09:43 AM.
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Old Jul 25, 2012 | 09:36 AM
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Originally Posted by EVO8STI
you'll definitely want a clutch but i dont think the twin disk is needed for that power. nor do i think the transmission or tcase is need but thats kindof a investment that yours wont go out so it could be money well spend. id run e85 tho, no reason not to!!! btw i had a exedy twin disk and i hated going to drive thru and traffic.

thanks for your comment.. We have no E85 here in Canada

And for the clutch, I could consider a exedy twin disk SD ?
Because non twin disks clutch are gonna have a pretty heavy pressure plate to hold that much torque, so hard pedal feel...

What would you recommend?



Dominic
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Old Jul 25, 2012 | 09:48 AM
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From: Springfield MO
Originally Posted by domyz
thanks for your comment.. We have no E85 here in Canada

And for the clutch, I could consider a exedy twin disk SD ?
Because non twin disks clutch are gonna have a pretty heavy pressure plate to hold that much torque, so hard pedal feel...

What would you recommend?



Dominic
dont really wanna recommended clutches but stay away from the act ss (super street) clutch. it has horrible lock out issues. i had a act hd 6 puck racing clutch with the act light weight flywheel 9lbs i believe and i never had a issue with it. everyone had there own preference tho. im just saying twin disk are not daily friendly!
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Old Jul 25, 2012 | 01:41 PM
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Might wanna consider a bigger cam on a 2.4.
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Old Jul 25, 2012 | 02:15 PM
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i daily drive my Exedy Twin disk its not that bad, its no WHERE close to how my mazdaSpeed 6 and the 6 puck ACT was. That mazda gave me popeye leg

Last edited by blowngasket; Jul 25, 2012 at 02:17 PM.
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Old Jul 25, 2012 | 02:30 PM
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It looks like a pretty sturdy build. I like to overbuild when it comes to this stuff so things like the trans and clutch are definitely a good idea...especially if you decide to go a little more extreme along the way. With regards to the rear diff, why not consider the Weir plates since you have it open? I installed this mod a few months back and absolutely love it.

Reliability is definitely paramount with this type of investment...but keep in mind that things do happen.

Last edited by Boostd4; Jul 25, 2012 at 02:33 PM.
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Old Jul 25, 2012 | 08:46 PM
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Originally Posted by Tanro
Might wanna consider a bigger cam on a 2.4.
For high rpm yes, but i'd rather lose some top end to keep solid idle and spool.
S1 aren't that much mild, i mean they are wilder than 264s.
S2 would need new valve springs and ideally some head work.. I don't
wanna go through this now.
Originally Posted by Boostd4
It looks like a pretty sturdy build. I like to overbuild when it comes to this stuff so things like the trans and clutch are definitely a good idea...especially if you decide to go a little more extreme along the way. With regards to the rear diff, why not consider the Weir plates since you have it open? I installed this mod a few months back and absolutely love it.

Reliability is definitely paramount with this type of investment...but keep in mind that things do happen.
I won't go with plates because I want to keep the cost down. Stock ones
are known to give great results. You probably know that there is so many:"Why not this! ... Why not that!!" when building a car. In the end you have more than you need and you have no more money

Originally Posted by blowngasket
i daily drive my Exedy Twin disk its not that bad, its no WHERE close to how my mazdaSpeed 6 and the 6 puck ACT was. That mazda gave me popeye leg
Yes this guy comment also confused me: Twin discs clutch have
much lighter pressure plates for the same torque rating than a single.
So DD is easier, I've read many experiences on these forums.

Last edited by domyz; Jul 25, 2012 at 08:49 PM.
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Old Jul 26, 2012 | 07:14 AM
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Originally Posted by domyz

I won't go with plates because I want to keep the cost down. Stock ones
are known to give great results. You probably know that there is so many:"Why not this! ... Why not that!!" when building a car. In the end you have more than you need and you have no more money

Well, the Weir plates are about $180USD...so it won't break the bank that much.
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