hey guys

just wondering if it'd be possible to attain 400+rwhp with a hotcam or a XE 224/230. What kind of heads would be required? AFR? expensive stock ported LT1 castings? Ideas?'

peace

 

I'd say you will have to go a bit bigger on the cam to get to your goal. I'd say 345-360 RWHP is possible with the Hot cam and quality ported LT1 castings. Maybe a bit more with AFR or other CNC type heads. I'm guessing you would need Long tubes as well.

There is someone on the site making 400 RWHP through an A4 with a Joe Overton cam about 224/230 in durationwith a 110 LSA and Loyd Elliot heads. Joe has a habit of squeezing unreal numbers out of smallish cams.

 

With some killer heads and a killer tune you could get close with a 224/230. Highest ive seen is 375RWHP

Havent seen much over 350RWHP with a hotcam, but it does much better with stock heads.

 

what about the 224/230 witha 383? my goal was originally 420 RWHP. am i dreaming?

thanks for any input.

 

Sorry to come across like an ***...

But why does everyone want rwhp? Torque is the key... torque is the coolest thing about muscle cars!!

 

i think that's a little too optimistic, but a 383 with some good heads will get you close. i'd go bigger with the cam, why use such a mild cam on a stroker? go bigger so you wont regret it later.

 

well, the idea here is to attain 400+rwhp/tq. without having to rev the **** out of the motor.

what about ported AFR 210 or 220's on a XE 230/236 (or similar custom grind) ? they seem to be good quality parts from what i've seen and only require the LT4 intake (which is seemingly better anyway)

thanks

 

If your interested in 400rwhp without having to rev to the moon it can be done. I would suggest the following:

383ci (3.75 cast crank will suffice)
5.7 Eage rods
Forged pistons (hyperuectic will work if no boost/nos is planned)
Poted stock LT1 castings (Lloyd Elliot or Phil @ A.I)
CC 230/236 112 (off the shelf grind) or
custom grind (talk to your porter)
Long tubes
Electic water pump
58 TB
etc.

All the above with a dyno tune to set your air fuel ratio and you should meet your goal. Your peak hp should come in at 5800-6000 rpms and this combo will be very streetable with a set of 3.73 gears or lower.

 

One of the Corvette guys turned 375 with 1.7 rockers with the hotcam and heads.

I would suggest some ported 190 AFRs, cleaned up intake, and the high lift verson of the 224/230 and put it on a 110LSA. I am sure you would come close.

 

I made a little over that on untouched stock heads, hotcamkit, SLP headers, and an orp/cutout. That was through my old 10 bolt w/4.11's. I would bet I could pick up 20 more or so with LT4 heads or something better. I wouldnt be looking at the hotcam though if my goal was to hit 400rwhp.

 

I made 392rwhp 380 rwtq with a smallish cam and RGR stage II heads and long tubes...A4 with stall also..Anything is possible.

 

I pulled 375/363 with the 224/230, stock ported LT1 heads, ASM Headers, Random Tech cat, and Radom Tech Cat-Back. Legit numbers, no cutout or anything. Six speed car.

The thing about the 224/230 is it's lift numbers. Intake of .536 and exhaust of .544 isn't a lot, considering most stock ported LT1 castings don't peak until .550 or .600 on a really nice set. A set of 1.7 rockers pushed the overall lift to .570 intake and .578 exhaust, right in the meat of the peak/hold flow. I think that would serve a lot better in most ported head cases than the 1.6 setup.

My personal thought is that if you had everything optimized (read good motor), no cat, six speed car, and tossed a set of 1.7 rockers in the mix, it could very well get there. Torque wouldn't make it, but the flat as Calista Flockharts chest torque curve makes up for any lack of a peak number there.

 

It's going to be nearly impossible to get there with either of those cams. Liker others have said, 375 rwhp is about the best you could possibly expect with either of those cams.

About reving the motor, don't forget that HP = TQ*RPM/5250

So HP is VERY dependant on how high you rev the motor. With a great set of heads and a matching cam, I've seen the LT1 hit 400+ rwhp as soon as 5700 RPM. Check out AI's site. http://www.advancedinduction.com/ Look at some of the heads/cam results. That will give you an idea of what to expect. You're probably looking at a cam that will have at least about 230 degrees of intake duration to get the numbers you want. (400 rwhp)

Dan

 

I don't think that you will reach 400 with either cam. You can put some good numbers down with them but not that good.

Good Luck

 

I bet if a porter designed a set of heads to work perfectly with that cam... you could get damn close to 400 rwhp granted the tune was on and every other aspect of the motor was working correctly. There are a few people on here making amazing numbers and track times to back them up with heads/cam combos smaller than the hotcam.