I found a couple cyl that had lost compression on my stock LQ4 bottomend, so I am faced with building it, what do yall think? Just bore it out and go 370, or go all the way, spend the extra and do the 408? I dont know if cost wise, HP per cube is really there?

This is not a daily driver, its a drag car, with insurance, and registration.

as far as future plans for the car, I wanted to switch to a solid roller setup, and have a healthy 500+ hp on motor, and maybe spray a couple hundred ontop. But for now, here is the setup

MTI 2E heads-cleaned up 853s
MTI X-1 cam- small but does work!!!
FAST 92/92- unported
SVO 42# inj

infront of a TH350, and strange 12 with 3.73s

for the rest of it, its listed on my fquick page, but I know that you cant just look at a motor from one point of view, you need to know the whole combo to make the most of what your talking about..

Thanks in advance for the advice.. Also any of our sponsors want to chime in with current deals/sales, I am looking to do this in the next couple weeks!!

 

Im doing a 370 now, I should get alittle over 500RWHP with my new Dart 205 heads and cam. Im still trying to decide on a cam, but I am waiting on my engine builder to pickup the heads from the machine shop to decide where I need to be at on a cam. I went with a 370 cause even in the long run it will be more reliable and it actually cost the same as a 408, just have to start watching tolerance levels with that big of a bore. My car is no race car by any means but if I need the extra power its going to be there.

 

How do you figure a 370 is more reliable than a 408?

 

Where did this myth about 408s being unreliable come from? Do a 408, you won't regret it. W/ a nice set of heads and a custom spec'd cam, you'll make over 500rwhp.

 

That's what I was thinking

 

Do the 408. You'll make more power with the 408 and it will also be reliable as well

 

Cool deal fellas, looks like I'll stick to my roots, no replacement for displacement!! Might as well go big.

 

My buddies car made 496 through a 9", 28" tires with a Tx Giant Cam and ported LS6 heads... Fairly mild setup, with better heads and a custom cam it would make more power easily.

 

You can't beat cubic inches or the torque and streetability that comes with them.

 

So, at what point do strokers get unreliable? It just seems like you see problems with so many of the big strokers. Oil burning, piston scuffing, etc.

 

You start having problems when you go past a 4" stroke in the LQ9/4 blocks (sleeves aren't long enough)

 

That makes a good point.. but the 408, is just a 4" stroke... so not an issue, also Wiseco pistons have made a piston around the idea, with a better placed ringland, and shorter skirt..

I think either is just as reliable.. it becomes unreliable when I spray 300 ontop of it, and plan for it to take it and smile!!!

even then, enough tuning, and I can make it last long..

thanks again for the ideas fellas..

 

I hope thats not a 408.

 

It is a 408. On a nitrous tune I might add...

 

wow, ok.

 

What's so wow about that? It's pretty average for a 408 to make that kind of power.

 

Just thinking if Im going to be making over 500 n/a with a 370, why not go with a 408?

 

Might as well. I don't know where you're getting the 500rwhp idea for a 370 that you haven't built yet though

 

my stock headed camed and intake LQ4 made 435 at the rear. So how come I wouldnt make 500 with a better cam and better flowing heads and FAST intake, and 370 ci ? Mind you this was on a very conservative street tune.

 

It's very possible. But I'm just saying don't count your chickens before they hatch.
I am ready to start building my 408... Money owns me though