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-   996 Turbo / GT2 (https://www.6speedonline.com/forums/996-turbo-gt2-2/)
-   -   Protomotive 3.8l built (https://www.6speedonline.com/forums/996-turbo-gt2/330486-protomotive-3-8l-built.html)

orbelo 03-03-2014 09:53 PM

Nice build man, enjoy it.

dynamic gt2 03-09-2014 12:30 PM

4 Attachment(s)
Today was a rainy day,nothing to do so i decided to go to my shop to remove the engine:),it tooks me 4 hours to do it,first i removed the bumper,ICs,Exhaust and turbos,cooling hoses,etc... then removed the engine/transmission.

Wealth Manager 03-09-2014 01:12 PM

You redid the under drive pulley and wheel? Why did you upgrade it? What does it do? I lack knowledge in this area. Thanks for any help!!

johnspeed 03-09-2014 01:32 PM

[QUOTE=Wealth Manager;4064430]You redid the under drive pulley and wheel? Why did you upgrade it? What does it do? I lack knowledge in this area. Thanks for any help!![/QUOTE






Lighter and smaller easier to turn requiring less HP to turn.

Wealth Manager 03-09-2014 01:36 PM

[QUOTE=johnspeed;4064437]

Originally Posted by Wealth Manager (Post 4064430)
You redid the under drive pulley and wheel? Why did you upgrade it? What does it do? I lack knowledge in this area. Thanks for any help!![/QUOTE






Lighter and smaller easier to turn requiring less HP to turn.


So the difference is minimal? Does it make it safer when raising the Rev limiter?

OS Inspector 03-09-2014 02:10 PM

[QUOTE=Wealth Manager;4064438]

Originally Posted by johnspeed (Post 4064437)


So the difference is minimal? Does it make it safer when raising the Rev limiter?


the original idea was a better mounting to the crank cause they were spinning off and coming loose, then they improved the rest of design made them smaller, and drive the accessories slower also.

K24F 03-09-2014 02:50 PM


Originally Posted by unvmy996 (Post 4060400)
I see 3.6 motors making just as much power if not more .... So other then the cool factor is there any other reason to do a 3.8?

The fact the 3,8 kit I bolt was fitted with ductile liners was more important than the gain to 3,746cc.
Mine is from FVD/Mahle, I see Todd uses another brand on Ali's and Dave's pictures but I believe their liners are ductile as well.
The 5% displacement gain is not all, the little lower CR allows a little more boost before knocking, and more power.

Wealth Manager 03-09-2014 03:08 PM


Originally Posted by K24F (Post 4064475)
The fact the 3,8 kit I bolt was fitted with ductile liners was more important than the gain to 3,746cc.
Mine is from FVD/Mahle, I see Todd uses another brand on Ali's and Dave's pictures but I believe their liners are ductile as well.
The 5% displacement gain is not all, the little lower CR allows a little more boost before knocking, and more power.


Isn't there also the downfall of going 3.8l since the sleeves will be thinner and won't last as long and can be prone to cracking??

awdbiturbo1 03-09-2014 07:57 PM

Please bring this to Byblos this summer!

joetwint 03-09-2014 08:27 PM

[QUOTE=OS Inspector;4064456]

Originally Posted by Wealth Manager (Post 4064438)


the original idea was a better mounting to the crank cause they were spinning off and coming loose, then they improved the rest of design made them smaller, and drive the accessories slower also.

exactly!

joetwint 03-09-2014 08:29 PM


Originally Posted by Wealth Manager (Post 4064484)
Isn't there also the downfall of going 3.8l since the sleeves will be thinner and won't last as long and can be prone to cracking??

No that is not a problem at 3.8.It can be a concern though with the next size bigger liner.

VAGscum 03-11-2014 12:39 PM


Originally Posted by johnspeed (Post 4060446)
In most cases,,a larger engine will have better throttle response and more power off boost And IF IT CAN get feed enough it will make more power on the same boost levels..

But my concern with aftermarket pistons and liners is longevity. Stock pistons and liners are quite reliable and durable. They also do not experience as much oil blow by due to hot/cold expansion contraction issues like many CP pistons which are race intended. In my experience their is no sense upgrading engine internals to race spec parts when you want to daily drive unless you intend on more frequent rebuild intervals. So that being said, wouldn't you get the same gains with some head work and maybe cams? Maybe throttle body upgrade and larger y-pipe? And those mods are not going to induce more problems if properly done. Just my $.02

That being said, to the OP. I think you will be extremely happy regardless. Enjoy!

johnspeed 03-11-2014 01:04 PM

Yes it all boils down to how much does some want to give up or Pay for that little extra power. . LOL
How many have pushed their projects from a reliable Street car to a weekend warrior only?

VAGscum 03-11-2014 01:39 PM


Originally Posted by johnspeed (Post 4065993)
Yes it all boils down to how much does some want to give up or Pay for that little extra power. . LOL How many have pushed their projects from a reliable Street car to a weekend warrior only?

I completely agree.

OS Inspector 03-11-2014 02:13 PM

Vagscum have you seen someone wear out a forged 996tt motor? Forged piston ductile iron liners I mean.


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