SBC 383 build Advice shooting for 550hp to 600hp

[zums]

Yep about 2 HP more... I would re-think the crank before you go further[quote][/quote]- thats funny, more dwell in the right area of the lobe will net much more than a measley 2hp

[Desmosis10]

That number gives you some idea of how much power the cam will make in upper rpm's.

oh ok I see how can I figure that out about how much power @.200 lift?????

[Desmosis10]

your aiming for 550- 600, why would you only use .6 lift

What Should I put 1.6 rockers on instead of the 1.5 rockers to make it a bigger lift is that what your saying???? which mean the 600/600 lift would turn into a 635/635 somewhere in that area I believe if i'm not mistaking...

Yep about 2 HP more... I would re-think the crank before you go further.

The crank is pretty good my engine builder wouldn't steer me wrong....

[af2]

Yep about 2 HP more... I would re-think the crank before you go further.

The crank is pretty good my engine builder wouldn't steer me wrong....

I was being a smart ass on the cam but totally serious on the crank!! Get a good 4340 or better!

[GARY C]

Hi All,posting.php?mode=post&f=1#

Its finally time for me to build my motor and have been reading a lot and would like to know your thoughts on my selection so far.

Car is a 1984 monte carlo ss that will see mostly street and just alittle on the track. My goal is 550hp to 600hp amd a little bit over 500TQ to FLYWHEEL. 4 Speed 700r4 w/ 4.11 gear & Power Brakes

So far

AFR 210cc competiton Heads with 650 lift hyd roller springs
Howards part# 113155-10S (Hyd Roller 600/600 lift 247/255 @ 050 on 110 LSA)
Motown single plan intake Manifold Part# 061040
SRP Forged Pistons part# 271055
Scat Forged 5.7 I beam Rods
Eagle Crank not forged
11.1.1 Compression
Scorpion Performance SRPST2112SBR - Scorpion Short Travel Retrofit Hydraulic Roller Lifters
1.5 Scorpion Platinum Series Rocker Arms
Scorpion pushrods
Howards Cams Rev Kits Part #90131
3500 Stall converter


Carb wise probably a AED 750ho-hp series Carb

1 3/4 - 1 7/8 in. Primary, 3.50 in. Collector Schoenfeld Headers Part# 186v
will be upgrading to 3in exh with x pypes dumpes...

Any advise or something you would do differently? My local engine builder here in Gary,IN is Cory's performance, He have been so helpful so far just looking for a few more advice to get what i'm shooting for

Not sure where to start, the ones I know of in the 550 to 600 range or 195 to 200 cc runners in the 248 to 252 range at .050 on a 108 LSA, ported Air Gap intake, I don' see the 9000 crank being a problem... let us know how it does.

[ap72]

Just my opinion, which isn't worth much, but I would have went with a forged crank, 6" rods and a lighter piston, probably would have went with a mild solid roller instead of trying to run a hydraulic roller on the edge- sometimes the simpler solution works a lot better too. Also, at that lift stud mount 1.6 rockers... there are some budget shaft systems that may be a better fit.

Your part combo will make almost as much power as my solution but durability will be down- I don't know how many miles you plan on putting on this thing.

Oh, and some work on the intake manifold will be worth some power at the top.

[levisnteeshirt]

i'd go bigger on the cam ,, comp has one with around 254/260 @ .050

only in magazines to they make that kind of power with such mild cams

the Eagle cast crank in something like this will be like sitting on a grenade , i'd at least look at one of the 4130/5140 cranks from Ohio Crank or RPM bare minimum

i've saw an Eagle cast crank handle 500 hp ,i'd never push one over that IMO ,, I've " heard " of Eagle cast cranks failing at much lower HP targets than your wanting

[CamKing]

AFR 210cc competiton Heads with 650 lift hyd roller springs
Howards part# 113155-10S (Hyd Roller 600/600 lift 247/255 @ 050 on 110 LSA)
Motown single plan intake Manifold Part# 061040
SRP Forged Pistons part# 271055
Scat Forged 5.7 I beam Rods
Eagle Crank not forged
11.1.1 Compression
Scorpion Performance SRPST2112SBR - Scorpion Short Travel Retrofit Hydraulic Roller Lifters
1.5 Scorpion Platinum Series Rocker Arms
Scorpion pushrods
Howards Cams Rev Kits Part #90131
3500 Stall converter

That'll make about 500hp, and start falling off after 6,300rpm.

[wyrmrider]

x2 what Mike says
" how can I figure that out about how much power @.200 lift?????"
ask Howards

I thought I posted yesterday but do not see it???
(or maybe it was in another thread)

I've seen in these threads that AFR heads do not need much longer exhaust
I've seen 0 to 4 degrees ( would think this would depend on porting, headers, induction, compression, etc)
you have 8
I'd put the higher lift rockers on the Intakes ONLY 1.65 or 1.7
I take it you already own the Howards cam
Time to run your combination and get a baseline
you could ask camking about the rocker ratios and he could touch up your lobes if a change is needed
He has some excellent hyd roller profiles- he will want your head flows and other details
but not till you know if you need to jump- and which way, and how high
Remember that Joe has lots of experience with your motor type
tight quench? your motor will live much better with no detonation
start off easy on the advance, maybe retard at the top end depending on your compression
you should have a broad torque curve, sometimes this works better than peak hp (what trans?, gears?
but consensus seems to be is that 600 lift (on the intake IMHO) is leaving power on the table

[Desmosis10]

Yep about 2 HP more... I would re-think the crank before you go further.

I was being a smart ass on the cam but totally serious on the crank!! Get a good 4340 or better!

Lol Oh Ok .. A new Crank not really in my budget so ill have to go with what I got

[Desmosis10]

Just my opinion, which isn't worth much, but I would have went with a forged crank, 6" rods and a lighter piston, probably would have went with a mild solid roller instead of trying to run a hydraulic roller on the edge- sometimes the simpler solution works a lot better too. Also, at that lift stud mount 1.6 rockers... there are some budget shaft systems that may be a better fit.

Your part combo will make almost as much power as my solution but durability will be down- I don't know how many miles you plan on putting on this thing.

Oh, and some work on the intake manifold will be worth some power at the top.

Thamks for the feed back...

[Desmosis10]

Just my opinion, which isn't worth much, but I would have went with a forged crank, 6" rods and a lighter piston, probably would have went with a mild solid roller instead of trying to run a hydraulic roller on the edge- sometimes the simpler solution works a lot better too. Also, at that lift stud mount 1.6 rockers... there are some budget shaft systems that may be a better fit.

Your part combo will make almost as much power as my solution but durability will be down- I don't know how many miles you plan on putting on this thing.

Oh, and some work on the intake manifold will be worth some power at the top.

My pistons are about 434 grams thats pretty light and 6.0 rods would be nice but I was on a lil budget of what I can buy in my price range. I didn't really want to go solid for the street just want hyd roller for my first engine build. I'm trying to see what HP rang I can get to with just my set up????I aiming for the 550hp to 600hp

[ap72]

I'd lower your aim to 500 and be happy for anything over that. 550 isn't an easy feat especially when you compromise on every part due to budget.

500 is still a lot on the street.

[Orr89rocz]

That'll make about 500hp, and start falling off after 6,300rpm.

I know you are the cam guru Mike but i am surprised to see this post. Curious as to your reasoning. I highly doubt that combo would be even peaked yet by 6300 let alone falling off. I ran a 230 deg at .050 hyd roller with .603 valve lift on a 383 with afr 195 heads and it peaked at 6250 and didnt fall off til 6600 but it had lots of exhaust duration so i guess thats why it held on.

210 heads and a 247 lobe?? I would expect that to hold beyond 6500 easily with a single plane.

[BrazilianZ28Camaro]

I'd lower your aim to 500 and be happy for anything over that. 550 isn't an easy feat especially when you compromise on every part due to budget.

500 is still a lot on the street.

X2