h/c/i combo
- Thread starter ponypowa2
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Is it possible to get in 400hp range with a good h/c/i setup and tune? I have the article which shows 400hp on a carbed 5 liter, and wanted to make sure I can do that with this engine... If so what is a good setup (planned on afr heads and custom cam)...
Rootus
Officially Addicted
350+ is possible, but hitting 400 at the crank is basically impossible. Need more cubes for that.
Its doable, but you wouldn't want it in a street car. The thing will definitely need to see some revs to get that kind of power out of it. Do you want 400RWHP or 400FWHP?
Yes, it is very doable indeed. I would go with afr 185 heads, a custom cam, and probably a very good flowing intake. Maybe a victor or a performer rpm2. Make sure you mention to the cam maker that 400hp is your goal. At the crank, 400 isn't too hard to get and 350 is easy with out of the box parts on a stock block. Just gotta have some planning and a higher compression than stock.
K thx for the replies.. I am trying to figure out the best way to acheive the most hp in the 400's without breaking the stock block ( mine is pretty much new). Would it make more sense and be more streetable if I aim for 300's in hp and then supercharge? I plan on using the car almost 100% on the street..
Its a hard decison for me, im starting to get some extra $$$ in and I need to decide whether to go n/a, supercharge, or turbo and stay within the limits of the block.
Its a hard decison for me, im starting to get some extra $$$ in and I need to decide whether to go n/a, supercharge, or turbo and stay within the limits of the block.
willys1
Active Member
2 things to get 400 RWHP out of a 302.
1) Spin it to 7000-7200.
2) Change the pistons.
With about 10.5:1 - 11:1 compression, and a piston that will accept a 2.02 valved head, you could probably do it fairly easily. I'd bet that you could do it in such a way that it would still be fairly street-able, too.
Joe
1) Spin it to 7000-7200.
2) Change the pistons.
With about 10.5:1 - 11:1 compression, and a piston that will accept a 2.02 valved head, you could probably do it fairly easily. I'd bet that you could do it in such a way that it would still be fairly street-able, too.
Joe
Rootus
Officially Addicted
... which is why I said "no" in my response. Just an H/C/I on an otherwise stock 302 won't do it, because the stock block isn't up to the RPM required. Now, if you're going to build it from scratch, that be a different story ... (and I would stroke it then anyway, why the heck not)Joes95GT said:
Dave
I think what he meant by "stock block" was the stock internals too. The internals, mainly the pistons, wouldn't allow you use a large enough cylinder head to cut back on the RPM necessary. With a 1.90 valved head, you'd probably need to spin the motor to 8000 to get 400 RWHP out of it. At these types of RPM levels, you are taking a chance of a rod exiting stage left...95snoozer said:
Joe
Rootus
Officially Addicted
I'm just going to go back to the original post, and take it worst case. Can you put together a H/C/I setup that will make 400 horsepower. Let's say crank horsepower, since that's a far easier target. I just don't think it's really a target that's practical, given the stated conditions. At best, 400 bhp is 340 rwhp, which I have yet to see anyone do (at least on here) with just H/C/I. Considering that most people think 300+ is a respectable target, I'm a bit surprised to see so many people in this thread who think 400 bhp is possible with H/C/I.
Or maybe I'm just dumb. Wouldn't surprise me a bit.
Dave
Or maybe I'm just dumb. Wouldn't surprise me a bit.
Dave
Rootus
Officially Addicted
There's what, one person on here with 325? Two? These people with 320+ are the statistical outliers, on the top end of the spectrum. The vast majority of us with good H/C/I setups are right near 300 plus or minus. Sure 340 is possible, but I think it is very unlikely.jghood13 said:
But why focus on dyno numbers anyway. There is much, much more to performance (street or track) than peak horsepower or peak torque.
I wouldn't try it on the stock shortblock. You'll be sorely dissapointed. If you can get it to run right, you'll have to knock the limiter out of it. If you knock the limiter out of it, you'll have to keep the revs above 2000 all the time. If you still run about 2000 RPM no problem, you'll be shifting at 7000. A stock rotating assembly doesn't like it. Rods like to detach from the crankshaft and exit stage right. I've seen it.jghood13 said:
Good luck in your adventure, though.
Joe
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