408W Build

[rcmbronc]

Well I am building a new 408W. I sold my 427 and wanted to try a different build. Here is what I am looking at so far.

Late factory roller block
Bore and hone with deck plates.
Ohio Crankshaft 4.0 stroke x 4.030 stroker kit.
Forged 4340 crank, H-Beam rods. Forged SRP pistons.
10.5-1 compression.
Flow Tech Induction custom hydraulic roller cam.
Edelbrock Victor JR heads. I will be doing a bit of port work on these heads as they come only CNC port matched.
Roller Rockers.
Holley Hi-Ram intake and 102 throttle body.
Moroso oil pan.
Holley Terminator X EFI system with transmission control.
36-1 crank trigger with cam sync dizzy.
Coil on plug set up.

Should be interesting build. Looking for hard power from above idle to about 6500 rpm.

One qestion. Do people use and recommend using a main stud girdle? I wont be at high revs alot but will be there. Did not want to spend on an aftermarket block on this build but wondering if a girdle helps at all.

 

[markw]

Well I don't know the answer to that but it sure looks like a bad ass build!

 

[pcf_mark]

That is going to be impressive! I like studs because I use a windage tray. With your stroke there is going to be a LOT of air moving around in the bottom end of the engine - up / down / sideways. Even at low rpm the oil if flopping around like crazy and at high rpm it gets absurd. Using a windage tray keeps the oil near the pickup. It should also make more power as a happy side effect. An article in Hot Rod with John Kaase indicating the oil pan is a mis-understood / under appreciated part of the stroker engines is out too.

With a flat tappet cam you can have too much windage tray and reduce splash on the cam. With your roller no problems!

 

[Apogee]

Considering the relatively minimal cost to girdle it, I would definitely girdle it, if only for peace of mind. Windage tray wouldn't hurt either so long as you can find one that's compatible with the girdle, pan and oil pump pickup you intend to run.

 

[rcmbronc]

I have read both for and against a girdle. Like the idea of studs also. Will look at windage tray also.

 

[Apogee]

I saw some DSS Motorsports stuff the other day, and while I have no idea how well they fit, they sure looked good and took a bit of a different approach on the windage tray...more of a pocketed aluminum plate/deflector than a sheet metal pan.

https://dssracing.com/D_S_S_Main_Support_System_s/6.htm

 

[68ford]

Keep in mind, depending on how much those heads flow, it will take some pretty big duration numbers to put peak HP at 6500.
Might I suggest, if you do not already have the heads, going with something bigger ready to go out of the box and not having to use such a large cam to hold the valves open longer. The exhaust side and headers with larger enough primaries are always an issue. My old 427 Windsor with AFR 225 heads picked up 45 HP on the Dyno going from 1 5/8 headers to 1 3/4 headers and that was only at 6000 RPM. Torque also increase at all RPM.

 

[rcmbronc]

I do have 1 3/4” headers. I was going to use AFR 205 but wanted to save some coin with the Victor JR heads and doing work on them. Ed at Flowtech induction suggested the 205 AFR. You got any other suggestions ?

 

[rcmbronc]

I also don't need peak power at 6500. Just pretty much making that max I guess based on the cam.

 

[rcmbronc]

Any one have any experience with the Trick Flow High Port heads?

 

[68ford]

Any one have any experience with the Trick Flow High Port heads?

My buddy just built a 445 Windsor with a set of high ports that have been ported even more and is very happy with them. On pump gas he made 685 horsepower and 603 ft lb of torque. Most of the port work was done on the exhaust side. Which brought my attention to the trick flow 225cc 11R race heads that have really big exhaust Port right out of the box

 

[68ford]

If your header flanges make it possible to redrill and take advantage of the aftermarket wider exhaust bolt pattern I would get a set of heads with the wider pattern because it makes getting to the exhaust bolts so much easier especially if you have inch and 3/4 primary headers

 

[nvrstuk]

I ran TF 205 CNC heads on my 418. Great head, breathed extremely well but my cam limited air flow- not the heads. If you plan on running over 6K rpm you'll need air flow, I'd definitely go with the AFR or TF, not the Edlebrocks... like ED said, they are a much better head. Ed really knows his stuff but 205's and 6500 rpm seems like they'd be maxed out... 225's you wouldn't be losing any torque at lower rpm because of the air velocity on those ports and you have the potential to gain a lot above 5500rpm... but I'd default to Ed.

Windage tray - yes

Girdle- not necessary but you can...

Remember what Jim figured out about 10 years ago... '94-6 roller blocks have cracking issues btw the #2 cam journal and the intake valley... check that carefully before you buy any parts for your "new" block. Just a heads up. It's common enough now for him that he won't build a block from an OE roller.

Why the plug on cover- benefits over EDIS?

 

[rcmbronc]

The coil on plug seems to integrate better into my Holley EFI. I am using a crank trigger with Hall Effect Holley sensor and the cam sync. I like putting the coils near the plugs basically for better plug wire routing.

I had the block checked for cracks so it should be good. Hope to not have issues.

 

[nvrstuk]

Good to hear about the block being good..
I'm running a stroker roller without any issues...

Sounds like a nice build.

 

[mjschneidy]

One qestion. Do people use and recommend using a main stud girdle? I wont be at high revs alot but will be there. Did not want to spend on an aftermarket block on this build but wondering if a girdle helps at all.

I ran pretty much that same combination, even the Vic Jr's, in my mustang that we road race. Many many miles of 2500-6800 rpm pulls during 20min road race sessions and I never had any issues that said I should be running a girdle. I did have ARP main studs in it. You should put those in before you line hone it though.

My Vic Jrs were mildly ported and I ran a TrickFlow Stage 3 hydraulic roller. Made 438 at the wheels with a big flat torque curve.

 

[rcmbronc]

So I have changed to AFR 205 heads. Based on AFR and Ed's recommendation. I got my drivers side crank trigger set up. Now waiting for my camshaft to finish the lower. Going to port match the intake and go from there.

 

[markw]

Maybe I missed it, but was wondering what oil pan are you going to use?

 

[rcmbronc]

I used the same pan on my last build. It is a Moroso 20520

https://www.summitracing.com/parts/mor-20520

I ordered a Moroso Windage tray and will check out the fit on that

 

[nvrstuk]

Check out the 351W Ford Racing block pan too. They use it on their 460 build. Amazing work on it.

- One way flow baffles

- windage

- excellent work