Hey, how is everybody??

I'm new to this site and was hoping for some help


I recently purchased a '69 z/28 and am wanting to put a streetable combo cabable of runnin 11's, most of my expierences have been with BB and don't have much knowledge of high horse sml blks.

Second, I have a '73 z/28 w/a 496BB(580hp-550tq) a TH400(3800sthal,manual valve) Dana 60(4.11) I'm wanting to replace the TH 400 w/a 4spd. What kinda tranny and clutch combo would work best

I have a M20 and 2 M21's,would modifying either of these with a super case work....Thanks for any help

With the weight of a 69,
put a mild BB in it if you want streetable.

If you want a small block that will get you in the 11's it is just a matter of what your definition of streetable is.

REALY GOOD HEADS,like AFR 195 with 383 cubes,AFR 210 with 400 cubes.
Soild or solid roller 245 intake .050 duration 500+ lift 110 LSA
383+ cubes
For a carb-Holley 750HP Double Pumper,950HP DP. or VS.
Performer RPM Air Gap or Victor JR. intake
Minimum 10.5:1 compression
1 5/8 or 1 3/4 inch headers
Minimum 2 1/2 inch exhaust pipes
TH-350 Trans with/Aftermarket Drum and sprag/Trans-Go stage II shift kit
3500+ converter
3.73 gear
28-9/15 SLICKS
Cal Trac traction bars

This should keep put solidly in the 11's with junk air.No 12.0's here.Unless you don't tune.

Or you could run a lot of NOS to it ;)

[ 10-28-2003, 09:24 PM: Message edited by: thrasher ]

Whats a 69 camaro weigh? My 75 Camaro is 3601 with me in it, and it is a high 11 sec car in the 1/4 mile. I'm doing it with a Hydraulic Comp 292 cam. Duration is 244 @.050, lift .534 with 1.6 roller tip rockers.

383 with AFR's as mentioned, D.P. carb, TCI stall that flashes 3300 rpm, and some free flowing exhaust to. U can see the rest of my combination on my web page. But it can be done with a small block.

Michael

Thanks for the input.......

A friend of mine said that this combo would work with the right tunning.......

383
11:1 comp
comp magnum 294 solid(248@.050-525 lift)
Victor Jr.
Dart Pro 1 215(2.05in/1.60ex CNC ported)
1.75 hooker headers
850 Dbl pump Holley

I hope that this is on the right track....as I have access to most of the parts.

That's identical to my combo except I run mildly ported Trick Flow heads and a 750 cfm carb.

The 850 you mention is a bit big IMO.

IMO the Dart Pro 1's REALLY need to be ported to get the most out of them.

The manual transmission will make it very hard to get 11's too. A TQ converter really helps a lot getting out of the hole and multiplies torque which cuts some time off your ET.

How about a 350 in a 68 Camaro? What would take to get that to run solid 11's? Not a daily driver. I was wanting to use a set of Pro Lightning 200cc heads, Victor Jr., 800 cfm double pumper.
Also, a solid cam (not roller), but I didn't know how much cam.

BillZ28-

The same set up would still work.

Since you will be dealing with less cubes the engine will come on the cam later and make its real power higher up you will have to change a couple things;

4000-4500 converter
410 gear

An 800DP should work.

[ 10-26-2003, 07:26 PM: Message edited by: thrasher ]

73Z496-

850 Holley is ok for a big block.

It's not good for a small block though.
Get a 750HP or 950HP instead.The 950HP's really only flow 830CFM.Holley inflated the figure.It is something that has been highly debated on this forum until we heard it from a Holley employee.

Which solid cam would be better, the Comp Magnum 294S .525/.525" lift or the new Comp Xtreme 282S w .520/.540" lift? Either with 1.6 rockers.

I asked someone about the 294S and they informed me about the new Xtreme 282S which has less duration, but newer design, slight less intake lift but more exhaust lift then the 294S. But they didn't know how the two would compare power wise.

On paper the XE is usualy better.
In the car it might not turn out that way.Every combination want's something different.

The whole XE thing is supposed to have equal power with more bottom end because of the lower duration and accelerating the valve quicker.

I wouldn't run 1.6 rockers with the XE line because they are designed to accelerate the valves pretty quick to begin with.The 1.6 rocker will accelerate the valves even quicker,it **MIGHT** prove too much for the valvetrain.

Ok thanks man.

I picked the 294s for my combo because I needed the extra advertised duartion to work with my high static compression on pump gas. That's the main reason. The more agressive dual pattern cams should in theory make a little more power using the same duration @ .050. They are harder on valve train parts though, how much harder I don't really know.

I'd use the Magnum 294s on an 11:1 compression aluminum head SBC; with a half point less compression (10.5:1) I'd use the XS282s instead. Both would make roughly the same power IMO but the XS282s engine would be more street friendly.

What about the XS290s? I'd imagine that's inbetween the 282 and the 294?

And with the magnum 294s and 11.1 compression, what kind of gas you running?

I had the 294s in a 10.5 to 1 350 and was very pleased with the performance. My car ran 7.50's in the 1/8 with it, that should equate to about 11.60's or better in the 1/4. Motor had good bottom end and pulled good to 7000. I used canfield heads out of the box a victor jr. and 750 holley HP carb.

Tnanks for all the reply's and info, it's nice to get opinions from "real world" expierences and combo's rather than a bounch of "coulda" "woulda" :D

Originally posted by BillZ28:
And with the magnum 294s and 11.1 compression, what kind of gas you running? BillZ28 - 93 octane unleaded. Actually my compression measures 11.28:1. 92 octane, hot nasty air, and stuck in traffic and I just barely start to signs of detonation - nothing audible, just a few black specs on the plugs. So I am kind of on the edge.

The Comp XS290s is actually a bit bigger at .050 than the Magnum 294s. The XS 290s is 252/260* @ .050 where the Magnum 294s is 248-250* @ .050. (I say 248-250* @ .050 because my 294s is 248* and Travis bought one new and it said 250* @ .050.)

The XS 282s is IMO comparable in size to the Magnum 294s. The XS 282s measures 244/252* @ .050 even with the shorter advertised duration. It should flow about the same amount of air as the Magnum 294s but should be more managable on the street because of the shorter advertised duration. It would also build more cylinder pressure than the Magnum 294s, which is why I could not use it.

Another option is to use a roots type blower. I've got a '68 Camaro, tubbed, dana 60 with 4:10 gears, turbo 350 tranny with 3500 stall, 350 bored .040, eagle forged crank, hellfire rings, J&E pistons, ( about 8:1, 8 1/2:1), block is O ringed, solid roller cam ( nothing big it has to be streetable), Brodix Track 1 heads, 1 5/8" headers, Weiand 8-71 blower kit with a pair of Holley 700 cfm blower carbs. This combo has run et's at the track of 10.37 at 129 mph. It doesn't have a trans brake either, this is foot breaking only!! You can race one day and the same night go to your local cruise night!!