Next step up from SY4000?

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Jan 19, 2002 | 07:51 PM

SuperZ28

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Launching!

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From: Dallas, TX

Next step up from SY4000?

I bought the SY4000 because 99% of my racing is on the street, and I have 3.73 gears...

but I already feel like I want more...

just curious as to what would be considered a next step up...
for a car with 245 DR, so too much STR is not a good thing
looking for mostly "from a jump" gains

thanks for any advice

Jan 20, 2002 | 08:58 AM

Patrick G

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From: Victoria, TX

Re: Next step up from SY4000?

A Yank Pro Thruster 4400 is the next step up. Don't let the higher STR fool you into thinking it's not easy to launch on the street. It is quite manageable to launch and it will KILL the SY4000 from a roll. I swapped from the SY4000 to a PT4400 a few years ago and never regretted it. The Pro Thruster is THAT good.

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Jan 20, 2002 | 09:00 AM

Ragtop 99

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Re: Next step up from SY4000?

Next step up is a YTP 4400. At that stall you're loose enough to step into throttle on the street; it requires just a little more care than what you've got.

The gains will be mostly from a roll. If you don't mind the looseness, Mike could swap the YTP 4400's stator and drop the STR down to around 2.2 This would increase the midrange gain, shift extension, and efficency.

For a bolt-on car or mild cam car, I wouldn't go any higher stall.

Jan 20, 2002 | 09:52 AM

SuperZ28

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Launching!

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From: Dallas, TX

Re: Next step up from SY4000?

I am planning on putting a cam in within the next month or two, and obviously getting new springs, rods, and retainers in....Is that a must for thet high if a stall ( the valvetrain )?

also, what RPMs would I be at during up-shifts at WOT?

once again, thanks for all the help!

Jan 20, 2002 | 07:25 PM

Ragtop 99

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From: Bethesda, MD

Re: Next step up from SY4000?

[quote] Is that a must for thet high if a stall ( the valvetrain )?
<hr></blockquote>
<img src="images/icons/confused.gif" border="0">

[quote] also, what RPMs would I be at during up-shifts at WOT?
<hr></blockquote>

5200 - 5400 is a pretty good estimate.

[ January 20, 2002: Message edited by: Ragtop 99 ]</p>

Jan 20, 2002 | 09:15 PM

SuperZ28

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Launching!

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From: Dallas, TX

Re: Next step up from SY4000?

Sorry if that was confusing..I just meant is it a good idea to put have the upgraded valvetrain for a converter that revs that high?

Hope that makes more sense...

Alex

Jan 21, 2002 | 01:09 AM

Mike Hoffpauir

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From: Baton Rouge, LA

Re: Next step up from SY4000?

Tonight cruising around in my Camaro on 15 inch drag radials (good tires, right pressure) from a 35 mph punch my car got sideways. Pretty cool--try the tp4400 =)