408 EFI Build

[jsniper06]

This is what I am working with. Comments please.

 

[KyleQ]

I'm not familiar with that upper-

This is a tubular GT-40 intake off a 351W

 

[NYLES]

I think thats the FMS cast version of the tubed one we got.

 

[KyleQ]

What color did you paint your engine block

 

[NYLES]

blue why?

 

[NYLES]

Kyle you know AFR's is da bomb! nI told you them covers would fit

check ya messages

 

[NYLES]

Which zf did you use 2x or 4x? thinkin I want one!

 

[jsniper06]

Which zf did you use 2x or 4x? thinkin I want one!

I used a 4wd one. Still in the process of getting it on the road.

 

[NYLES]

I used a 4wd one. Still in the process of getting it on the road.

I think I can get more benefits from a Zf over my C4 than a atlas fro the money. Atlas can come later. I went with the C4 because of wifes knee but she's about to push a clutch or ride!

 

[jsniper06]

I had a C4 too, couldnt stand it.

 

[KyleQ]

I had a C4 too, couldnt stand it.

That makes three of us

 

[Bronco_69]

dang, nyles, you are all over the place.

 

[jsniper06]

Would an A9L computer work with my setup or will I need a tune for the 30Lb injectors?

 

[NYLES]

Would an A9L computer work with my setup or will I need a tune for the 30Lb injectors?

Think you just have to match your MAS. Or say MAS must be calibrated for 30lb injectors.

 

[HoosierDaddy]

as a rough guess-timate , each cfm a head will flow can get you 2hp PROVIDED all of the other parts are correct for the set up also.

On a 408 , 400hp would still be a pretty mild motor.
Personally , I'd throw the bank at it and get the Trick Flow 185's that are flowing 301 cfm straight outta the box. $1800 ....
A small port that flows like that would probably be like magic on a mild 408. You have to jump up to 205 or better heads to get comparable flow , but the bigger runners will move the rpm range of the head upwards.
I'm not to the point where I MUST order my heads yet , but I'm considering getting those for my 347 build , because the 170's are not available until June.

 

[HoosierDaddy]

That was exactly the goal..

I've since regretted it though. Phenomenal breakage over the last 8 years since I started wheeling it. Not any problem with the engine though..%)

That was exactly where I wanted to go with my build , but all of the breakage stories from the 408 crowd guided me away from that , among other things.

Machinist has the Exploder block and 347 kit ordered , FlowTech hasn't returned with the custom cam info yet , heads I'd prefer are not available until June

 

[nvrstuk]

For fun could you print out a list of parts that you feel your 408 contributed to an early death?

Be interesting to see where the weak points were for you... (let's see... D20 output shafts (then low D20 low gearset-then case cracking), 28 spline rear axles, crappy drivelines (and ujoints), crappy D44 ujoints/axles, then what...???

TIA

 

[NYLES]

That was exactly where I wanted to go with my build , but all of the breakage stories from the 408 crowd guided me away from that , among other things.

Machinist has the Exploder block and 347 kit ordered , FlowTech hasn't returned with the custom cam info yet , heads I'd prefer are not available until June

Id call AFR!

 

[bmc69]

For fun could you print out a list of parts that you feel your 408 contributed to an early death?

Be interesting to see where the weak points were for you... (let's see... D20 output shafts (then low D20 low gearset-then case cracking), 28 spline rear axles, crappy drivelines (and ujoints), crappy D44 ujoints/axles, then what...???

TIA

My 408 carnage list:

Stock Rear D60 axle snapped
1330 drive shaft yoke grenaded
1330 rear dif yoke grenaded
1350 CV "h" yole split in half
1350 rear dif yoke grenaded
yoke cup on 1350 'extreme' spline DS section ripped apart
Half a dozen Yukon 44 outers along with some Spicer 760 joints
Two Yukon pass side inners
pass side knuckle casting exploded
three or four Warn hubs grenaded
Warn 44 outer grenaded in to 6 pieces.

 

[nvrstuk]

Impressive list... regular parts eater!