98RedBird

iTrader: (77)

I'm looking into picking up a 408 stroker short block this winter from either TSP or LME. I am leaning towards LME right now because I hear nothing but AMAZING things from people about their quality. I am going to be spraying this motor probably in the neighborhood of a 200 shot. From what I've seen this should be an easy 750whp and around the same in TQ, or up around 800+ if I want to jump up to a 300 shot.

On to my questions....

Cam choice? Not sure where to start. Currently I have an MS4 but this will choke up a large cubed motor like the 408 I think. I'm considering going with the Texas Giant camshaft from TSP but want to hear from some of you guys first...

Heads I am strongly thinking I'm going to go with Trickflow heads. I see flat out KILLER numbers out of them on the 408's.

Now, for intake and exhaust. I currently have a FAST 90 and QTP 1 3/4 LT's. I'm wondering if I should be upping to the new FAST 92 (ported) and either Kooks 1 7/8 or the TSP 1 7/8 headers instead, what do you guys think? I don't want the intake/exhaust to hold me back but I know how important airflow is on these larger cube motors.

Lastly, I'm considering going with a different trans. I've got a Performabuilt level 2 that only has about 400 miles on it but I don't think it'll hold up too well to the 408 with N20. If I were going to look into something to hold that power what should I be looking at? TH400? 4L80?

Thanks for the help guys!

slow trap

iTrader: (22)

i'm still running qtp 1 3/4 headers but only spray it with a 150-175 hit so on bigger hits i would probably step up to the 1 7/8. as for the tranny a th400 is hard to beat,that is if you can live without the overdrive.i'd keep that 90/90 and have it ported if it hasn't been already.cam wise the giant or similar with 11:5 scr or alittle higher should be a sweet setup.

98RedBird

iTrader: (77)

Great man, thank you for the info. I am also wanting to look into HKE engines. Who has any experience with them? Customer service, price, build quality?

Thanks guys

98RedBird

iTrader: (77)

Any other suggestions?

DVS99TRANS

iTrader: (7)

That is what I'm planning is an iron 408 from LME. Worst case scenario, everything you have will swap over and make the same power and more. Swapping to L92 heads then becomes possible but when looking for a cam. Call Pat G or someone like that and they will give you exactly what your looking for. I know that's not much help, but people like that know EXACTLY what your looking for. I'm going to do the same setup your going for, and that's what I'm going to do instead of guessing or just take suggestions. No offense guys, but do it right the first time If your going to build 408 a purpose(street or track), then it's going to need a certain size cam also.

Although that MS4 will make awesome power on a 408 though.

98RedBird

iTrader: (77)

I think the MS4 will be restrictive to a 408

N4cer

iTrader: (11)

I see the 408ci motors running great on cams in the lower 240's duration for intake. I loved my Futral 243/246 cam. The bigger cams always run all sloppy for street use.

DVS99TRANS

iTrader: (7)

The MS4 will crack 500 with a 408 along with a decent set of heads and a FAST 90/92. Someone just did it with a TSP 402, because I was thinking the same thing. I've talked to a couple sponsors about it and it's not restricting it, just not running the full potential of the motor is all. You can always swap up later, which I think isn't all that bad. Just make sure you have a good tuner is the key.

Here's a link to back it up and it was with a MS3. Plus look at his dynograph, he makes unreal power down low.
https://ls1tech.com/forums/dynamometer-results-comparisons/970307-tsp-402-w-ms3-stage-1-ls6-heads.html

98RedBird

iTrader: (77)

Hmm, cool man! I was talking to a sponsor on here who was saying that you need to go with a larger cam in a larger cubed motor, otherwise you'll be holding it back a little. I don't mind swapping cams to see some more better numbers though.

PowerShift408

iTrader: (44)

Stick with your FAST90 and have it ported. I have a 90 on top of my 408. I've got a Patrick G nitrous ground cam w/ a 200 shot in mind, although I'm going to spray 250 to it. I've got AFR 225s as well. In the tranny department, I did have a built T56, but now I'm in the process of doing the 4l80e swap. Was going to do the TH400, but I wanted overdrive and a lock-up style converter.

N4cer

iTrader: (11)

If you guys need the adapter to use a 4L80e with your 4L60e harness, I have one sitting here for a good price.

Fifedogg

iTrader: (15)

The MS4 isnt going to chock up your motor per say. I used the MS3 in my 402 and love it. I wasnt trying to make an all out drag car though. If you plan on doing so I think the TSP giant cam will work good though. I would recommend some eddelbrock 245's or some AFR 225's. Trickflow also makes some of the best heads out there.

Fifedogg

iTrader: (15)

Yeah that was me I did that through cat's and a magnaflow catback. I love the way it drives and when I hit the gas it has some great pull. If your going with an all out drag racer I would get some better heads and a bigger cam. Just make sure to match your heads with your cam.

1fast1slow

iTrader: (2)

Imho you should definitely get a custom grind cam to match your specs, specially w/ the nitrous. I just got a set of kooks 1 7/8 headers and they are freakin awesome and fit well on my c5.