Thats a nice "seasoned" block

 

Thats a nice "seasoned" block

Thats a nice "seasoned" block

I hope you can get it apart it looks pretty rusty the other thing will 60 over clean the rust up and i think 250 for half an engine is a little pricey. Up my neck of the woods we can get a whole unrusted engine for that price and i live in Taxachusettes where everything is CHARGE A PLENTY PLUS. GOOD LUCK with your project. Alex.

 

This one had a fuel pump hole, that's why we went with it. Picture of the block cleaned up before machine work.

 

Next time check Facebook Marketplace for an engine. I have found a lot of stuff there.

 

Thanks for the information.

 

More pictures

 

Do you think that will get you into the 11s? That's only a couple more degrees of duration than I have in my 355 with 10:1 compression and I don't think it would come close to 11s. Maybe with some really low gears. But to be fair I've never launched it anywhere with decent traction.

Your carb and intake seem a little mismatched to me. 850 cfm says high end power and RPM intake says lower to mid range torque. If I was trying to get better track performance I'd go with a single plane and if I wanted better street performance I'd probably drop down to a 750.

 

Thanks again for the info, I was really hoping to run low 11s. My Camaro weighs 3165. I was always told a dual plane likes a bigger carb? I also hope to have 11.1 compression with my L98 heads.

 

More pictures

 

Mark, nice looking machine work. Off topic but can you deck a block and leave the original stamping?

This the same engine discussed over at Team Chevelle?

 

OP, bench racing and the real track results are always different. Your motor combo sounds fine and machine work looks good.

IMHO to be in 11's it will be more due to traction and how your rear suspension is set up. You will need at least a 1.7 60' time (every .1 60' gain is .2 gain at the big end) to be in 11's anything and good DA. You will need track tires (read not drag radials). MT ET's (26 x 10-15). 4:10's, at least, and at least a 3600 stall if an automatic. Those gears and stall will not be ideal for the street but will pay off at the 1/4 mi.

Shake down runs, carb and timing adjustments are all part of the dance getting the car to do what is needed. Have fun on the journey.

 

IMHO to be in 11's it will be more due to traction and how your rear suspension is set up. You will need at least a 1.7 60' time (every .1 60' gain is .2 gain at the big end) to be in 11's anything and good DA. You will need track tires (read not drag radials). MT ET's (26 x 10-15). 4:10's, at least, and at least a 3600 stall if an automatic. Those gears and stall will not be ideal for the street but will pay off at the 1/4 mi.

Shake down runs, carb and timing adjustments are all part of the dance getting the car to do what is needed. Have fun on the journey.

In addition to the above, you'll need close to 500hp peak to get in the low 11s . I don't see it with that combo unless you're running nitrous. Naturally aspirated, a .060" over 350 would need at least 6500rpm along with all the matching parts. That includes a camshaft with more duration and better heads.

What's your compression ratio? Are the heads ported? Since you already have the cam, at least upgrade to 1.6 ratio rockers. 1 7/8 headers x-pipe with 3" through the mufflers (you can run 2.5" tailpipes out the mufflers for deeper tone, better torque, and a slight reduction in dB). Make sure the 850 has annular boosters to help the carb signal. And really, you should be going with a larger camshaft like the Comp 12-443-8 and 11:1 compression.

 

Thanks, and it has been fun! My car is probably better than most, but not as good as it could be for sure. The DA is about 3000-4000 this time of year where I race. Shooting for 1.4 60 foots?

Some more pictures

 

Might need a 100 shot for 11's...

Wish you luck either way

 

So here is where our build took a turn for the worst. We decided to use the Corvette L98 heads, a horrible performance head. But the good thing is we had about 2000.00 in the build. Now it was time to head to the dyno for some testing. A picture of the finished engine.

 

The L98 heads.....

 

I'll add: Engine building is pretty much one compromise after another trying to end up with the best "total package" for your intended purpose.

The harder you push to the 11 second build the further you will move away from a well-mannered "street engine".

Depending on just how much street use you have in mind ... there will likely be a considerable compromise someplace.

Edited to add: Hopefully you don't end up with neither of the goals met.

 

The

The plan was to build a very mild engine that would be just as happy in a truck with a stock converter as it would in my Camaro running down the track.

 

IMO The easiest way to add noticeable power to a 350 (in the manner you suggest) would be to begin by adding about 33 CID. 😜

 

Not a big power maker. Track test time now, was it a waste of time?

 

I’ll guess:


1.43 60 foot
6.87 660 foot
10.89 @ 120 MPH

 

if that engine combo runs those numbers i should be running low 9's on the motor. no way

 

did we ever discuss the rest of the car? what about trans, converter, rear gear ratio, suspension upgrades? that engine combination doesn't look like a low 11 second combo in a Camaro. maybe in a super light weight something. i know you posted a curb weight. i don't see low 11's maybe mid 12's. what's the rest of the car combo? obviously all this debating is happening after the fact and you've already completed the build, had it on a dyno and had the car together and at the track............what did it run?

 

Ok. I'm Guessing best time is 12.2

did we ever discuss the rest of the car? what about trans, converter, rear gear ratio, suspension upgrades? that engine combination doesn't look like a low 11 second combo in a Camaro. maybe in a super light weight something. i know you posted a curb weight. i don't see low 11's maybe mid 12's. what's the rest of the car combo? obviously all this debating is happening after the fact and you've already completed the build, had it on a dyno and had the car together and at the track............what did it run?

The Camaro has a Turbo 350, a ATI 8 inch converter, 7.5 rear end with 4.56 gears, highest ratio for a 7.5 differential. The weight I posted is as run down the track. Suspension is basically stock type, TQ arm setup. Tires are a 30 X 9 radial slick. Some pictures. What does 433 HP run @ 3165?

did we ever discuss the rest of the car? what about trans, converter, rear gear ratio, suspension upgrades? that engine combination doesn't look like a low 11 second combo in a Camaro. maybe in a super light weight something. i know you posted a curb weight. i don't see low 11's maybe mid 12's. what's the rest of the car combo? obviously all this debating is happening after the fact and you've already completed the build, had it on a dyno and had the car together and at the track............what did it run?

The Camaro has a Turbo 350, a ATI 8 inch converter, 7.5 rear end with 4.56 gears, highest ratio for a 7.5 differential. The weight I posted is as run down the track. Suspension is basically stock type, TQ arm setup. Tires are a 30 X 9 radial slick. Some pictures. What does 433 HP run @ 3165?

1320/105 MPH=12.57=282 crankshaft HP @ 3165?
1320/115 MPH=11.47=371 crankshaft HP @ 3165?

 

1320/105 MPH=12.57=282 crankshaft HP @ 3165?
1320/115 MPH=11.47=371 crankshaft HP @ 3165?

Based on ET I come up with slightly different numbers.

 

4:56 with a 30" tire with a 7.5 rear....that rear is like glass with anything making more than 300 RWHP so I suspect its track life will be short lived.

Post up a time slip

 

Yes-that was an experiment, so far it's been fine, but the ring and pinion is the weak link. This combination seems easy on everything. I have run the car with much more HP than the mild 350, no problems but I always foot brake the car.

 

Mark, your combos always seem to astound many...and I'm sure this one is doing the same.

On paper, it shouldn't do what it does...

 

Something to consider

121 MPH @ 3165 = 435 crankshaft HP observed
1320/121.3=10.88

When I had 433 HP I knew it would run 10s, especially when I looked at how it carried power past peak. I think one of the points of this thread is you can have a low buck mild 350 run 10s, a good cheap bracket engine that could easily go in a truck.

 

 

Mark, any way you can put your aftermarket headed 496 “Ripper Special” discussed at Chevelle in this car??

Seriously, 433 hp in most cars will not get anywhere near running 10’s. Your setup is optimal and most cars are not - providing some tips for all on converter selection, suspension and other details would be most appreciated. Lots are eager to learn and improve their rides.

 

I forgot to mention in good air I think it will run high 10.70, its been 10.80s at the slow track in 2000 DA.