Where would you go from here?

[falkenracing]

Ok, first post in the "real" board.
I have a 383/4 speed B-body. Full power equiped. Will be getting a set of 3.55 gears this spring, but after that I think that I will just drive for a while and see how it feels.

But, when time comes to upgrade th engine, what would be first thing to adress? Right now it's a .030 over, stealth headed engine with a comp xe262h camshaft, hooker super comps and a edelbrock performer intake with a holley 750 hp on top. Rebuilt in 2012-2013, but didn't have the heads when i chose the camshaft, and the intake was with the engine when i got it, so i think there are power to be found in this little engine, right or wrong?

I think the 3.55 sg will be a nice upgrade from the 2.7 open in ther now, so won't feel a lack of power for a while.

[hemiken]

I would suggest a camshaft change to something like a Lunati VooDoo #10230705LK http://www.lunatipower.com/Product.aspx?id=2339&gid=362, you would also have to look at your carburetor for an upgrade also.
If you want even more, go for a Solid Flat Tappet in a Lunatu and have a think about stroking it out to a 496 - the 383 will go that size easy and the heads will just cope with some tickling.

[Road_Runner]

Considering a similar build for the 70 Roadrunner, and will either go with a 3.9" stroker crank for 448 cubes or swap to a 512 cube 440 stroker motor.  So I'd be interested to see how your build goes with the 383.

Later, Jim

[falkenracing]

Ok Hemiken, that there looks like alot of camshaft for a street driven 383 (forgot to mention the street duty on this car)

As for the stroker, tell me about it! If I've know'n then what i know now, this engine would be kind of different from how it is.
This was a fast, no real planing, forced rebuild when i spun a bearing in the early summer of -12. Figured I would fix it up fast and easy and be on the road before the end of the season.
Next time we go 400-451 or maybe even 470. RB-block is'nt as interesting to me because of the extra weight and physicaly bigger block. And I do not race enough to be after every single drop of juice in this car.

RR, the engine is done and in the car, just planning ahead to se where I will likley find my hidden power in the future. As long as I can keep upgrading this basic engine and feel the diff, I will not get bored and do somthing stupid.

[Chryco Psycho]

Which intake , Performer or Performer RPM , the RPM is good the other not so much
 Port the heads if they are off , cam , tuning etc  {there is usually a ton of power just tuning it right
 If you are rebuilding stroker makes sense .

[cudabob496]

Stroke it!


https://www.youtube.com/watch?v=C_OGARBe6W0

[falkenracing]

Well, the intake is the stock, low performing performer, will go Rpm in the future. Do anybody think there will be a substasial gain in power when doing that swap, will I be able to "feel" the difference?
New cam could very well be coming up, as could rolller rockers (maybe go 1.6).

Stroker will, as i stated, NOT be in the works for a couple of years since this one is a fresh rebuild and I would like some miles on it before I swap it out.

[hemiken]

You already have stealth heads, so just the intake swap over to a performer RPM will be something that you will feel when you swap it out. Even try a spacer block too, to see if you get any benifit from that also. That first cam i suggested would be a good street camshaft with those heads and an intake swap, you will have to add a rear metering block at the very least to jet the carby correctly to cope with the added flow of the heads and the reaction from the camshaft i recommended

Go the 496 Stroker route later like cudabod linked to, with a port job on the stealth heads and a larger carby and a rethink on the camshaft, econo-horsepower at its best

[cudabob496]

A roller cam is good!

[Chryco Psycho]

no perfect cam , Hyd rollers can collapse with decent spring pressures to take advantage of the faster ramps so most hyd rollers are on the tame side & solid rollers may not oil the rollers enough at idle , not really suited for street use .
 I prefer solid flat tappet but you have to use high ZDDP oil all the time

[falkenracing]

Hemiken: Ok, i was worried that it would be overcamed with such small displacment and such aggresive cam. The holley 750 hp already have secondary jeting and screw-in air bleeds, so think I'll be good there. Realise that 496 will need more cam and subsantially larger carb, but that problem will be pure luxery when you feel the power i guess

Chryco: After reading some horror storys about ruined flat-tappats, I now use zddp-additive in my engine oil no matter what, and I hope that i will stay clear of any trouble that way. I have seen you recomend the lunati 303(?) camshaft before, would that be a decent camshft for an engine like this, being kind of milde and tame on both size and compression (around 10:1 if i recall correctly)

[Chryco Psycho]

Need more info on the engine , comp ratio , stall converter , rear gear ratio , what RPM you typically run the engine at etc
 the 303 cam seems to be changed to 703 , the can Ken recommends may be a bit to large for a typical street build as it requires 10.5 compression & 3500 stall converter .

[cudabob496]

no perfect cam , Hyd rollers can collapse with decent spring pressures to take advantage of the faster ramps so most hyd rollers are on the tame side & solid rollers may not oil the rollers enough at idle , not really suited for street use .
 I prefer solid flat tappet but you have to use high ZDDP oil all the time

Hmmm, I thought roller cams were the latest thing in cams?  The solid roller in my 496 (.625 lift) has great street manners,
and has been performing flawlessly for 14 years.  And its supposed to outperform any similar flat tappet cam?

[falkenracing]

Well, The info is in there, just a little hard to find 

But, here we go:

10:1 compression (as I recall)
2.7 open rear, going 3.55 in a month or so.
Stall converter, Stick shift, so non.
Cruises at 2200 rpm now, will be up towards 2800-2900 at the highway with new rear i suppose.

Not in hurry to change the cam, I think the new rear will bring it to life and give some good fun for a while. And then there's always the possability to swap the intake for an RPM when I feel the need for some extra grunt.

[Sleepychallenger]

what about chaning to different ratio rockers?