well i will start with my combo is a 406 with hbeam rods, balanced crank, dished kb pistons (9.0:1 compression), a comp cams 292 xtreme energy cam, performer rpm air gap, afr 195 heads, and a 750 dblpump carb, witha 4hole spacer. I run the least amount of timing possible with the starter dragging a little, but where i get the best ets.
My car runs anywhere from 13.0x to 13.1x on almost any given night and condition, minus crappy track prep.
and my mph is usually 103-105. i run through the traps at about 5000ish rpms maybe 5500.
i have 3.90 gears with posi, and a th350 tranny with shift kit and 3000stallconvertor. 26"tall et streets.
i run through hooker headers and 2.5" exhaust with an h pipe and flowmasters at the track.
will a swap to a solid comp cams 282s grind bring me more horsepower and torque? Better yet will just a swap from hydraulic to solid bring me more power?

Does anyone have any recommendations on a solid cam for my combo because i do not mind adjusting the valves, and if it brings me power than im all for it.

also comp recommends the 981 spring for almost all their solids, and i was wondering if my springs that came with my afr heads are good enough to run a solid cam. they supported more duration (242 is what i have now and 236 is what im considering going to)and lift (.500 compared to the solids .495)

thanks for all of your help in advance
rick

I would say that swapping to a smaller cam should bring you better ET's whether it is a solid or a hydraulic. I personally prefer the solid Comp 282s - I just did a chassis dyno flog and that cam and my 383 pulled hard from 3000 through 6500 RPM.

I really never expected it to pull hard above 6000 rpm but I think thats where the solid lifters really help out a bunch.

Your compression is on the low side for a big cam like your XE294 - especially at 5000 feet. You should really pick up some torque out of the hole where you need it most with a smaller cam. I would expect trap speeds closer to 110 mph with the 282s in your combo (even at 500 feet).

As for the valve springs, I would call AFR and ask them what spring is in there. Ask them for spring installed height, seat pressure, and coil bind height. Then you can compare the AFR springs with the 981's that Comp recommends for the 282s and smaller solid cams - that is the only way to know for sure.

------------------
68 Camaro with 383 small block. ET - 11.9's at 112 mph and never trailered.

The combo:

10.3:1 KB pistons, Eagle cast crank, 5.7" SIR rods.
Trick Flow 23* heads ported 2.055 intake, 1.6 exhaust.
Comp Cams 282s mechanical cam with 1.6 rockers.
Victor Jr intake and Holley O-3310 carb.
1-3/4" Hedman Headers, full length Flowmaster exhaust.
TH350 trans, 3000 stall, 3.55 gear.
CE subframe connectors, drag shocks, SSM lift bars.

Hey one fast 69. I live in Castle Rock. I'm putting together my 383, it has flat tops, RPM heads and intake, and I went with the 282s. Tranny in turbo 350 and 3000 converter. I can't wait to get it running. Just need a place to work on in instead of my mom's backyard. Anyways I just want to say listen to Eric 68, he has inspired many here with his combo. Let me know when you go racing, would like to see it run sometime.

I want the 282s because it is quite a bit lower profile than my current one, and i want more torque because i know thats what 400s are for, and im right now running mine like its a nascar mill but with lawnmower compression http://www.camaros.net/forum/smile.gif

I will get in contact with afr immediately, because i need to get this all done within the next 2 weeks so im ready to race the weeked after mopar milehi nats.

eric68 i dont know if it was a typo or not but i race at 5800ft not 500 http://www.camaros.net/forum/smile.gif


Lukeskywalker: I go racing every friday night there is a gtx series race. i was racing in high school but im switching to street class because i fit in better there (high school is home to all of the dads living thru their sons with race cars, and im doing this on my inconsistant street car)

I will be up there this friady and the friday after nats if you want any more information, email me and ill hook you up.

Thanks for your help

rick

Next time listen to what I mean, not what I say http://www.camaros.net/forum/wink.gif 5000 is what I meant.

Good luck with the cam swap!

Why the low compression???

you can run 11-12:1 compression on pump gas-- and it would help your combo make more power.


If that were my set-up I would raise the compression(mill the heads or change pistons)I would also pull that hyd. out and put a comp cams 294s(525 lift 246@050) also put a Super Victor intake and have the carb worked over. That should put you in the high 11's or low 12's for sure.

This is my combo:

'73 z/28(3350lbs w/driver)
388ci
AFR 215cc race package(2.08in-1.62ex)
11.5:1 comp
super victor intake
800 holley HP
Comp Cams 294s
M20 4-spd(reworked w/supercase)
Dana 60--35 spline--spool
300hp NOS sportsman fogger 2 stage

my best time in the qtr: on motor 11.69---
on spray-10.56 at 126mph(200hp jets)


GO FAST.....OR GO HOME!!!

are you sure about your compression? what is the piston dish(cc's), and what is the chamber size on the heads? you may already know this, but just because KB says 9:1 doesn't mean thats what you have. also, a 406 likes bigger duration numbers and a tighter lsa than a smaller inch motor. i dont reccomend cams, but i'm running a solid roller, and love it. it makes a ton of torque and pulls like a mofo to about 6300 where the heads give up. just talk to guys at the track (and on this board) w/ similar combos and do your homework, and youll love the results.

EA73Z you have a good running set up but i don`t think you have to walk so close to the edge to run well.
11-1 is doable yes, 12-1 not really. Not on pump gas.
You don`t have to run a solid cam nor a super victor either. Especially for a street driven 406....And a spool? Is this a street driven car?


------------------
78 Camaro hyd cam 406
TH350-3.23 gear
11.86 ET
116.7 MPH

Eaz73

What type of rebuild did you do to your tranney. I have an M20 that I am going to rebuild but i would like to make some performance enhancements if I can. What do you recommend?

I cannot afford to put new pistons into the engine. otherwise i would.

heres my pistons: the kb 147 which have an 18cc D cup and have a compression ratio of 10.2 with a 64cc head. its also a .030 overbore and i heard that helps compression?
my heads are a 74cc chamber, so i do not know how to figure my compression i just thought that it was 9.0:1 or somethiing.

IF ANYONE CAN TELL ME MY REAL COMPRESSION RATIO ID BE EXTREMELY HAPPY.

I am still thinking the 282s is a good cam, because i do not mind at all adjusting lifters, and i kinda want a cam that will pull without limits so to speak.

I'm ordering my parts tomorrow so please tell me my compression and any other camrecommendations.

oh yeah remember that i am racing at 5800 feet elevation.

thanks
rick

Brother 1Fast69Chevy...I ran the numbers through my compression calculator and here's what I get:

Bore, 4.155 (4.125 + .030)
Stroke, 3.75
Chambers, 74 cc
Piston dish, 18.0
Deck Height, .015
Gasket thickness, .039

Computes to 9.01 to one.

If it were me, I'd look for a single pattern cam that closes the intake around 60-65 degrees...will help build some cylinder pressure and consequently will build low-mid range authority which is what a 400 is all about.

Why doesn't Comp Cams make a 276s???

Let us know what you decide. Good luck!

Don't be too down on your motor because its 9:1 - just look at the benefits - you could run a nice shot of N02 on it . . . or a small blower . . .

If you want to seriously think about running some N02 you could pick a cam made just for that.

The only thing to be careful of is the ring gap on your hyperutectic pistons - the gap on the top compression ring is usually wider for N02 engines with the KB pistons.

Sleepy-69 go to www.ReedCams.com (http://www.ReedCams.com) contact them guys, they have a catalog of lobs and grind every cam on a custom grind. Get the LSA, and lobes of your choice. Which is nice if you want an "inbetween" cam with like 228 dur. (as compaired to the 270s, or 282S).
They have many many lobes in hydrualic, solid, and both types of rollers. I dont know how expensive they are but i'm going to be looking into them before i buy a cam for my combo.
If they're to expensive i'm buying ethier Crower or Ultradyne. Look into them and see if they have a cam you like.

while i am sick of having dismal compression to start with, so i am going to buy flat top pistons with valve reliefs that will bring me up to 10.4 static compression ratio. i have already checked with afr and they said clearance should not be a problem. i will then probably get the 282s and run that cam. i hope i can do it all for under 800 bucks

any more tips are greatly appreciated.

who would you go with for hyp. pistons? i have kbs but heard the top ring gap is big compared to others.

thanks
rick

<BLOCKQUOTE>quote:</font><HR>Originally posted by 1Fast69chevy:

who would you go with for hyp. pistons? i have kbs but heard the top ring gap is big compared to others.

thanks
rick[/B]<HR></BLOCKQUOTE>

KB pistons are light and strong and are the best hyperutectic piston out there from what I've heard. I've been real happy with their durability in my 383. They also fit tight in the bore when compared to most forged pistons, but I have heard that there are some new design, tight fitting forged pistons out there now.

The ring gap is wider only when cold. When they come up to operating temp the top ring gap closes up and is the same as any other piston. It has to do with the higher ring location and heat properties of "hyperutectic" pistons. If you set the top ring gap too small on a hyper piston the ring ends will butt together and break the ring land - from what I hear this is where people usually usually run into trouble when using N02 with a KB piston. The directions are really easy and I set mine up in less than an hour.

TommyG....

I purchased a "supercase" with a nodular center plate($380) then I had the gear clusters and shafts re-maid out of the same material that the Jerico's are(L6 for the gears and stressproof for the shafts $520) I work for a heat treat so that was free.
I leave the line at 5000rpm and powershift at 6600rpm and have yet to have a problem.