Additional considerations when boosting

[86 South Africa]

I found this article which I thought gave a nice insight into some of the considerations when looking to boost the FA20...

So, considering I am keen on the Edelbrock SC, and considering the long debates everyone has about how it will affect your car i.t.o. reliability etc, I thought it was worth sharing.


I am by no means the doyen of SC/TC, but there is definitely a ton of "opinion" on here that isn't always correct

http://www.revvolution.com/blog/2014...he-fa20-4u-gse

[xkalelx]

Thanks for sharing! That's a good write up on a post FI teardown. One thing to note, since that article has been out for a while, is that it HAS been determined that the rods are the weak point and (from what I keep reading) if you are are making more than 300-350 whp, you are on borrowed time with them.

Heres some pretty good evidence of that from Moto East and MAP performance. http://www.ft86club.com/forums/showthread.php?t=98229

[GsxrMe]

Figure if you are even 325whp, that's nearly double the whp to factory. For anyone to expect more out of a factory engine is insane. Also noted there is alot of small things that need to have taken care of, like...

Clamping all the vacuum lines.
Installing a check valve on evap line to prevent boosting your gas tank.
Cooling, engines hate heat.
Don't apple boost to crank case by using the wrong catch cans setup.

List go's on.

[Andew727]

Originally Posted by GsxrMe

Figure if you are even 325whp, that's nearly double the whp to factory. For anyone to expect more out of a factory engine is insane. Also noted there is alot of small things that need to have taken care of, like...

Clamping all the vacuum lines.
Installing a check valve on evap line to prevent boosting your gas tank.
Cooling, engines hate heat.
Don't apple boost to crank case by using the wrong catch cans setup.

List go's on.

which vacuum lines other than the one under the intake manifold?
and what catch cans work? or whats needed to make a basic catch can work? petcock?

[86 South Africa]

Originally Posted by xkalelx

Thanks for sharing! That's a good write up on a post FI teardown. One thing to note, since that article has been out for a while, is that it HAS been determined that the rods are the weak point and (from what I keep reading) if you are are making more than 300-350 whp, you are on borrowed time with them.

Heres some pretty good evidence of that from Moto East and MAP performance. http://www.ft86club.com/forums/showthread.php?t=98229

Ooh. Nasty pic!
I've read similar stuff re the rods.

[MisterSheep]

Nice read. Really enjoyed learning more about our engines.

[totopo]

Originally Posted by xkalelx

Thanks for sharing! That's a good write up on a post FI teardown. One thing to note, since that article has been out for a while, is that it HAS been determined that the rods are the weak point and (from what I keep reading) if you are are making more than 300-350 whp, you are on borrowed time with them.

Heres some pretty good evidence of that from Moto East and MAP performance. http://www.ft86club.com/forums/showthread.php?t=98229

Pretty sure it's a teardown of a stock (NA) motor with 18k miles in preparation for future FI, not a post-FI teardown.

[Sleepless]

Originally Posted by totopo

Pretty sure it's a teardown of a stock (NA) motor with 18k miles in preparation for future FI, not a post-FI teardown.

From the first post, it is clear it was FI via Sprintex 335 blower:

So lets kick this off. This car Started out in 2014 as a daily driver First thing i did to the car Was a set of
KW V3 coilovers then wheels and tires and at this point as most of you know, the need for more power comes into play.
I started off with a Sprintex 210 Blower I needed more power went to a 335 the car with the 335 Made around 276 Wheel
Horsepower on a mustang dyno. While driving along at above 120 MPH the car developed a tick.
Turns out that "tick" was actually piston slap. So off to moto east it went to begin forming a plan.
(pictured below are the pistons)

Later, we find that is running 19 PSI:

We've made some mention about what our thoughts are here in other threads, but generally we don't recommend running for a prolonged period of time on pump gas at high loads and boost > 14 psi. That goes for any setup.

Inlet temps of 160 F are not that unusual on a high boost SC setup. When you do that for a prolonged period of time then the chance of knock goes up substantially, and there's nothing you can really do from a tuning standpoint to fix that. Just lower compression and better cooling or e85. At less than 12 psi it is not a big deal, but with the 19 psi the 335 was doing, that was a lot to ask from the stock motor and pump gas.

[BRZoomTX]

19psi from a supercharger is a lot of low-end torque. No wonder the rods were bent. I'm honestly surprised they weren't more deformed than the picture shows.

[totopo]

Originally Posted by Sleepless

From the first post, it is clear it was FI via Sprintex 335 blower:



Later, we find that is running 19 PSI:

I meant the original revvolution/scr teardown. responding to the "That's a good write up on a post FI teardown. " Not talking about the other thread and rod.

[xkalelx]

Good catch @totopo I hadnt had my coffee yet when I posted that, thanks for the correction.