302 on the dyno today. Tick Tick Boom…..

1969 DZ302 Lots of money to hopefully make 370 HP…….
Stock rebuild with LS valves and springs.

 

I've seen them at 350 hp but not your number. Keep us posted.

 

The spacers indicate a bit more than valves and springs!
Good luck on the dyno, hope all goes well.
Curious why the electric WP is mounted that way.

 

Just curious & asking
Does Not look a rebuild Dz 302 from Camaro dealer with just Ls spring & valves ?
As we can see
header style , Not exhaust nor Camaro headers of time .
Carb
Distributor
water pump
Fuel pump
Looks to be Z intake .

Is The Crank , rods , piston 302 Gm ?
Wouldn't you want to use rest as original Gm parts originally built & used. 350 plus Hp
I would think thats would be the test ,
With Ls Spring & Valve switch .

If not why not go all the way with
302 cid would not be a DZ thoe
Just Block maybe crank & intake
With
Maybe 18 deg heads ext but 302 cid


Is Valve train all Gm 302 parts beside
Springs & Valves ?
The weak link was Valve train weight @ high Rpms
The way I read Stock Rebuild ,
Or Lighten parts with ***anium, rockers , girdle , maybe pedestal , push rods, lighten Roller lifters & solid .

Valve cover spacers
In my experience will leak if not modified So No ledge / shelf on inside , as in spacer same size or smaller then Valve cover So oil can not lay & leak between cover to spacer

 

Quick break for lunch update. Pulled the valve covers to install the inner springs which were not in to break the cam in. Pulled the oil filter cut it apart. All looks good. Did it leak down. All good.

@19Eddy30 Wow. I didn’t have time or interest this morning to write a whole story.
It’s a real DZ with GM original DZ302 parts. Those are Dyno headers, carburetor, water pump, Distributor and fuel pump.
After it gets a baseline pull, we will swap out to the original list 4053 carburetor and the correct original distributor who’s part number escapes me at the moment. You don’t run a mechanical fuel pump or the original water pump and pulley on this Dyno.

 

@badshifter
I know Dyno time is $$ , & most shops want to run ,set up with there typical Dyno run parts equipment.
Me in testing I would want to run simulate as close to @ would be installed & Gm correct to do a comparents test to see what the Ls parts Vs Gm dz 302 springs & Valves .
The other option to know / fined
The other Dz 302's dyno
If a compe***ion use same parts if a test
& bragging rights .

Me personally maybe I'm looking at this too deeply what test is about ,
I think of Dyno pulls / tune
That there is 2 types
One to fine tune for max with what you built ,parts used with some adjustments.

The 2nd is Test swapping / changing
Parts to make the Max R&D .

Back in early 80's the 302's was not even a teen , cousins where having Valve train issues not realizing Valve train weight trying duplicate CanAm
Era of 302's

 

Well, that was fun. 10 100% trouble free pulls.
I got within 7/10 of a horsepower from what I wanted.
369.3
Original carburetor The 72 Primary Jets, 76 Secondary. 38° total timing.
Isky 201524-10 solid lifter cam. It is smaller than the original 3030 cam but makes more torque. That was the primary goal because this original 69Z 28 is going Vintage Road racing.
I don’t know how to post videos.

 

@Moriarity
This should make you happy, despite all the advice I got from everyone I refused to go modern wheels. I’m running 15x8 corvette rally wheels. It may not be as fast, but it damn sure looks better!

 

You had a good day.

 

Is the engine for the yellow car or the other one?

 

For the other one (blue now but originally and eventually going back to Cortez Silver).
I’m building a track car with only bolt on/removable parts. I’ll post more of the car as it comes together.

 

That could happen!
I have to think about that one….

 

Roller rockers……
The water pump belongs to the dyno.

 

As cast cylinder heads?

 

Yep. No porting. I did screw in studs. Three angle valve job. No blending hard rolling etc.

 

Wow! Thats impressive! Should be a high reving, high hp, little monster. I have a couple of 302 chevy cars. I love the way they run.

 

Whenever I see 302 posted on the HAMB 99.9% of the time it's a Ford, so when I saw "tick tick boom" I wasn't too coņcerned.
THEN I GOT REALLY CONCERNED.
Glad it went well.

 

Just a note on the dyno headers, the dynos I’ve been around are wide at the pump and ch***is headers will not fit so the dyno headers are a must. Manifold’s work also but it’s just easier to use the headers, manifold’s can cost a ten percent hp and tq loss. I’ve tried using the ch***is headers I use on my cars but they were both too narrow.
The other thing is that you can put the same engine on three different dynos and get three different peek numbers depending on how the dyno is calibrated and if the operator manipulates the numbers.

 

I helped a good friend of mine run NHRA F stock for many years with a 69 Camaro 302. With a cheater cam it dyno'ed at 412 HP . Please keep us updated on the build of the car

 

Those are good numbers from that little engine. I ***ume you used the ls valves for the 8mm stems helping the valve train weight. If you can make them fit and are legal a tri y header with about 6" between the primary and secondary y's will stretch your torque curve about a 1000 rpm's on the bottom and not hurt the rest. Good job!

 

Nice, man I love that sound! If we weren't so far away, there's an unused, still in the tube '140' cam under the bench you could try if you cared too. I like how this going, thanks for the updates!

 

What disappointment! Reading 302 I was hoping for a GMC 6. Hell I would have accepted any 302 Ford, Windsor, Cleveland, or maybe a DOHC….but it was just another SBC….

 

Almost need the cross ram to get the most out of that cam as they were developed to work with each other.

Love me a 302 Chevy winding up, just sweet music.

 

heads look great. Those 186's are pretty good out of the box for old stock heads. I have a set on my 327 in my C10, but they have had every old racer trick done to them in the ports to get them to flow.

 

Truth there. It's a dinosaur of a cam by today's standards. But it sure made those Trans-Am singers hit the next octive in it's day. Not much *** down low, but what a set of pipes!
Besides, who doesn't like dinosaurs?

 

And I, like more than a few other most likely, feel exactly the opposite!

 

That 140 cam in a well built 327 would turn over 8 grand. In a 302 with 492 angle plug heads, Edelbrock original Tarantula and a 750 double pumper, open headers, 9 k. But we worried about those small journal rods…