Stroker motor talk!-Threads merged

[LvSteve]

A budget 408 build
http://www.musclemustangfastfords.com/t ... ewall.html

[PaulW]

Here is a thread on Ryan McCormick from RJM Injection Technologies situation
http://classicbroncos.com/forums/showth ... p?t=238609
It includes tips on the archives and other places where his tech info is available.
More info here
http://www.fullsizebronco.com/forum/sho ... 897&page=3
PW
==============================

Here is the poop on the 5.0L Knock Sensor:


The Knock Sensor is a signal generating device called an accelerometer. It detects engine detonation (knocking), and converts this frequency signal in a voltage. The sensor consists of a piezoelectric element mounted in a threaded metal housing. Vibrating the element generates the voltage signal. Special construction makes the element only sensitive to the particular engine vibrations associated with knocking.

When spark knock occurs, the Knock Sensor produces a pulsing electrical signal. This signal is put through an amplifier and then sent to the EEC. The EEC then immediately retards spark timing until knock is no longer sensed, or up to a maximum 8° retard. The engine will return to normal spark advance after the MAP sensor detects a 3-4 in. Hg. change in engine vacuum.

In summary, the Knock Sensor assists the 5.0L PCM in allowing the timing to be advanced to the edge of detonation and then backs it off slightly for maximum performance and fuel economy.


Ryan McCormick from RJM Injection Technologies offers the following 5.8L perspective:

Why doesn't the 351 have a Knock Sensor?

1. 5.8L is a stronger block.
2. 5.8L has a better firing order than a standard 5.0L from the 1980's.
3. MAF does a better job of calculating fuel ratios, which helps prevent lean conditions.
4. It saved Ford some money by not including 1 of everything found on their parts self.
5. Not all engine designs have a frequency that is easily identified as a "knock" from the other valve train background noises.

Keep in mind that a 5.0L is a different beast having smaller mass, operates at higher rpm’s and has different harmonics which a Knock Sensor can identify.

[big-d]

I hava 418w installed in my truck. I am in the middle of wiring up a mass air conversion. My question is about what headers to run. I have a set of MAC equal length mustang shorties and a pair of headman long tube headers. Both have 1 1/2" primary tubes. I am leaning towards using the long tubes. Is it worth running the small primary tubes or am I better off selling both sets and getting 1 5/8"? All opinions welcome...

[Seabass]

Primary sizing should be based off of exhaust valve size.

[BDKW1]

Primary sizing should be based off of exhaust valve size.

Among other things.....

But to answer the question, the long tube headers will be much better than the shortys.

[LvSteve]

Long tube work much better on strokers

[Phoenix0783]

Long tube work much better on strokers

Because they generate a stronger exhaust pulse on the lower rpm end of things which increases torque there.

[Hauls Assington]

https://m.youtube.com/watch?v=6P0-AEEzgEA

Got her running, it is getting close to test drive time!

This motor is a 414w , windsor sr. Heads, small cam, weiland stealth, holley 750, 10.3cr, forged pistons. It sat and the gas went bad, this is the first time i got it running decently, more tuning to come, i got egt installed, in hopes i can really get the carb and timing nailed.

[LvSteve]

Very nice . Sounds Good . What cam is in it ?

[Hauls Assington]

It has a comp cams custom grind, with grind #FW x4 254H-11.

Intake lift .477

Exhaust lift .493

Duration

Intake 210

Exhaust 218

Lobe separation 111.0

I have actually driven this thing now, and can say that the motor is perfect for this application, I have 3.55 gears with c6 and there is no need to put lower gears, this thing has so much bottom end it is insane. There is no need to rev it over 4500 rpm either. My bronco is wayyyyy faster than stock. I have a 2wd titan which is pretty fast, and ran a 14.8 at the drag strip, and the bronco wipes the floor with the titan.

[LvSteve]

I run a comp all so
with afr 205 heads 58cc. 10.7 cr. 42 pound injectors 80mm tb and 90mm mas
comp part # xfi 35000-9
224 @ 50
573 lift intake
230 @ 50
568 lift
112ls at 108 center

If smokes my Tundra that's not stock ....BAD !

[RyanDS650X]

Had to bump this after re reading and doing homework on a stroker for my Bronco. tcinu2 what is your current set up for MAF and TB? Using the V10 and F150 stuff or aftermarket?

[LvSteve]

80mm accufab and 2004 lightning 90mm Maf. 42lbs injectors. I do not run a truck intake

[funinthesun95]

Ryan I need to make the call today 351w built or 393w...I have 12 hours lmao

thanks for the bump

[ChaseTruck754]

Sounds like a pretty easy choice Willie - lol!

[dtbback]

Ryan I need to make the call today 351w built or 393w...I have 12 hours lmao

thanks for the bump

393W all the way!!

My dream engine
Internally balance 393w with 9.5:1 for pump gas
TFS170 heads
Crane Cams 444222 (Super aggressive for torque)
Crane Cams distributor
Edlebrock Intake w/twin 56mm BBK with a 1" phenolic spacer
Lightweight Flywheel

[RyanDS650X]

Ryan I need to make the call today 351w built or 393w...I have 12 hours lmao

thanks for the bump

Dude you have all the goodies to make the 393 sing. Buy the crank and Pistons!

[funinthesun95]

Ya done 393w......will have it in a few weeks

port matching intake and cleaning it up along with port and polish on heads.....

he started the bottom end today 393w all forged internals, custom grind cam, should be a torque monster we will see. torque converter stall? I know 2400-3000 but whats the correct number boys?

lets be real our ford tranny eat up power so if you don't set the drive train up, you will not see the outcome you want.

[RyanDS650X]

Mine is a 2200 stall, just a basic RV converter.

[funinthesun95]

Thank Ryan