rugby!

my motor is in the middle of install. the builder thinks i will get 450/500 at the crank so 370/410 at the wheel will that be in the range with this motor
1. 383 stroker (forged internals)
2. afr 195cc heads 68cc chambers
3. hyd. roller cam and lifters 224/232@.050 114LSA ( because i will add nitrous later)
4. Mahle pistons flat top 5cc VR 10.4:1
5. Howards 1.6 roller rocker arms
i hope i can hit around those numbers. could i put in a cam at 112lsa and it run well with nitrous. i just hope i didn't put $5500 into it without getting out of it what i want thanks for the input

steve40th

You will probably make 465-480 Flywheel HP, and around 510 ft/lbs toq. My 2 cetns.
NOS will do fine with any LSA. Make sure you have long tuebs, and at a minumum a 52mm T Body, and a very good tune should be fine.

FD2BLK

I don't know what type of intake system you have but my LT1 did a bit better then the #s you are looking for. The LT1 reverse cooling may help a bit but I realy don't think it will make a big differnce. With a SR you should be able to get the TQ you are looking for as long as the head cam package works togeather well.

steve40th

My 396 made 428ft/lbs tq, and 400 rwhp with an automatic and 2800 stall on a dyno with a 11.1 compression, Hot Cam (218/228 duration 525 lift in/ex) 58 mm T Body, long tubes and Flowmaster ex. So with a 16-20% loss (yes this is arguable) its at 480-496 flywheel.

vader86

What intake is on the car.

vettefast

I have pretty much the same setup and I am between 430-450 hp.

88421VETTE

My 406 will prob put out around 420 hp and 510ftlbs with the tpi setup but your heads are better than mine. so depending on your intake who know. beside who cares about hp numbers it's all about E.T.'s. I'm hoping for a mid 13 up here in SLC (4000ft) that's high 12's at sea level

Timmy!

I think you'll be low 13's or high 12's if you make those #'s. I have a 383 LT1 and it made 353hp/368lb/ft at the wheels and my best with the stock trans and converter and 3.07 gears in Denver (5800' track) was a 13.02.

88421VETTE

I have a 2800 stall convbut I think I have 2.59 gears. I don't really want to change the gears cause all that will do is make more traction issues. i guess it will all depend on the air quality and temp. I wish I had the money for a miniram cause the power would be over 500 but would loose some bottom end but I figure with the TPI it will be a much better street engine. and i won't have to wrap out the engine to see good power. should make for some nice 60 foot times as long as the rearend holds up. I guees we'll have to wait and see

rugby!

sorry about not having all the info 91 auto 2400 stall, superram intake, 58mm tb. 1 3/4 lomgtube headers tpis, magnaflow catback

vader86

Ok, it shouldnt have any trouble making those power goals.

rocco16

If you can get 450 reliable hp (sans nitrous) for only $5500, I want the phone number of your engine builder.

Larry
code5coupe

game on

Me too!

JAKE

For an engine that most of us would consider "streetable", 1.1 to 1.2 HP per cubic inch displacement is a very accurate rule of thumb.

It's primarily about the three "C"s. The more cubes you start with the easier it becomes to meet your goal and you can use less radical parts in the process.

The cost of getting there depends on how many parts you already have and how many you have to buy.

Jake

neat

I also think your numbers are pretty realistic. My 92 (LT1) 383 made 380 RWHP on motor with home ported heads, hotcam, shorties, and a good tune.

88421VETTE, if you make over 400 at the wheels, you should be good for mid 12's here in Utah. My 92 went a best of 12.600 @ 110.99 with only 380 RWHP.

J Z06

my bread and butter LPE-383 was rated at 440/480(crank) power levels.

it made a bit more than that by calculating the weight of the car and the best trap speed....it made more like 460 crank hp so yes, your combo is definitely promising.

NitrousSam

I think it will be easier for you to make the horsepower numbers than the torque. The 510 torque number may be pretty stout with your combination. I would say in a 406 or 415 you would have an easier chance getting that torque number and still keeping it a driver. However, I like your camshaft for the nitrous setup. I have made in excess of 50 more flywheel horsepower than the kit settings claimed by running a nitrous specific camshaft and a timing retard system. You are on the right track and happy hot rodding!

88421VETTE

I really need a bigmouth manifold or edelbrock. cause my engine is gonna starve. I might just throw a 150 shot on it and call it good

FD2BLK

I think you will be right on target with the SR intake and that combo if the head cam package works togeather. I made more TQ then you state with a short runner LT1 intake.